| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 359648000 | With field curvature shaping | 69 |
| 20080297910 | Micro-Lens Arrays and Curved Surface Fabrication Techniques - A method of fabricating a sub-millimeter scale curved surface on a substrate ( | 12-04-2008 |
| 20090086330 | OPTICAL PICKUP, OPTICAL DISC DRIVE DEVICE, AND OPTICAL INFORMATION DEVICE - A small optical pickup of wide spherical aberration correction range is provided. The optical pickup includes a rising mirror for deflecting a light beam at substantially right angle and guiding to an entrance surface of the objective lens; a spherical aberration correction lens having one surface formed to a larger curvature than the other surface; a lens holder for holding the spherical aberration correction lens so that the surface of large curvature partially projects out towards the rising mirror side; a guide member extending in an optical axis direction of the spherical aberration correction lens sand having an end arranged to the side of a reflecting surface of the rising mirror; and a slidable part slidable along the guide member; wherein the projecting portion of the slidable part is configured to be fitted within the side surface of the reflecting surface of the rising mirror, and the projecting portion from the lens holder of the spherical aberration correction lens overlaps the reflecting surface of the rising mirror when the spherical aberration correction lens approaches the rising mirror the most. | 04-02-2009 |
| 20090141364 | IMAGING LENS SYSTEM AND CAPSULE ENDOSCOPE - A capsule endoscope has an imaging lens system | 06-04-2009 |
| 20090323195 | Lens master devices, lens structures, imaging devices, and methods and apparatuses of making the same - A method and apparatus providing a lens master device and use of the same to form a lens template and/or a lens structure. The method includes obtaining a plurality of individual lens masters, each of which has a shaped portion defining at least a portion of a lens structure to be formed. The lens masters are affixed onto a supporting structure to form a lens master device. | 12-31-2009 |
| 20110286102 | Optical Adaptor - An optical adaptor is disclosed for use in combination with an optical imaging system. The adaptor is specifically configured so that when it is positioned within the optical path between an object and the imaging system, the adaptor corrects the field curvature of the imaging system so as to produce a substantially flat image of a curved object. The adaptor comprises a primary lens unit of positive power which in use is towards the object and which preferably takes the form of a thick meniscus lens having an overcorrect Petzval Sum, and a secondary lens unit of negative power which in use is towards the imaging system and which preferably takes the form of a relatively thin meniscus lens. | 11-24-2011 |
| 20120069449 | IMAGING LENS, IMAGING APPARATUS AND INFORMATION TERMINAL APPARATUS - When an optical image is formed through an imaging lens on an imaging surface that is convex toward a light incident side, the imaging lens is constructed in such a manner that a defocus MTF peak position at an arbitrary image height in a range of from 70% to 100% of a maximum image height of the optical image is located further in a light-traveling direction than a same kind of defocus MTF peak position on an optical axis of the imaging lens. | 03-22-2012 |
| 20120224268 | OBJECTIVE OPTICAL SYSTEM - An objective optical system including an objective optical system having a field angle of 140° or larger and including a front group, an aperture stop, and a positive rear group arranged in that order from an object side. The front group has at least one aspherical surface and includes a negative first lens disposed closest to the object side and satisfying the following conditional expression: 0≦r | 09-06-2012 |
| 20120320463 | AUTO-FOCUS ACTUATOR FOR FIELD CURVATURE CORRECTION OF ZOOM LENSES - A wide field angle camera module that incorporates field curvature correction suitable for an electronic device is described herein. By way of example, the wide field angle camera module comprises micro optical lenses adapted to capture field angles of greater than thirty degrees, and is further adapted to provide field curvature correction for a range of object distances, and for a range of zoom configurations include 1×, 2× and 3× zoom configurations. Furthermore, the field correction can be implemented alone or in conjunction with signal processing that corrects barrel distortion introduced by the micro optical lenses. In particular aspects, the field correction can be automated based on image quality analysis to provide a high quality image for object distances substantially 30 centimeters or larger. | 12-20-2012 |
| 20130027783 | PROCESS FOR CORRECTING ABERRATION DEFECTS WITHIN AN OPTICAL DEVICE FOR OBSERVING A FIELD THROUGH A WINDOW - The window substantially has the shape of a dome. The optical observation device includes means of optical conjugation of the observed field with a plane of observation and means for relatively orienting the observation plane with respect to said field. Optical correction means are provided so as to correct aberration defects. According to the device, system, and method, said optical correction means are arranged between said windows and said relative orientation means in such a way that said optical correction means form an optical system with said window, which is at least substantially afocal. | 01-31-2013 |
| 20130235463 | OPTICAL IMAGE LENS ASSEMBLY - An optical image lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. The first lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The second lens element with refractive power has a concave object-side surface and a convex image-side surface. The third lens element with refractive power has two surfaces being aspheric. The fourth lens element with positive refractive power has a convex image-side surface, wherein the surfaces of the fourth lens element are aspheric. The fifth lens element with negative refractive power has a concave image-side surface, wherein the surfaces of the fifth lens element are aspheric, and the fifth lens element has inflection points on at least one of the surfaces thereof. | 09-12-2013 |
| 20130258490 | IMAGING APPARATUS - Provided is an imaging apparatus, including: an imaging optical system including a plurality of lenses; and an image plane which is disposed on an image side of the imaging optical system and is curved so that a concave surface thereof faces an object side of the imaging optical system. The imaging optical system includes an aperture stop. In the imaging optical system, a lens closer to the object side than the aperture stop and a lens closer to the image side than the aperture stop have different positive powers. A focal length of the imaging optical system is substantially equal to a distance from an exit pupil of the imaging optical system to the image plane. A radius of curvature of the image plane is substantially equal to the focal length of the imaging optical system. | 10-03-2013 |
| 20160202455 | OPTICAL ZOOM LENS WITH TWO LIQUID LENSES | 07-14-2016 |
| 359649000 | Projection type | 57 |
| 20080198472 | PROJECTION TYPE IMAGE DISPLAY APPARATUS - The present invention is a projection type image display apparatus comprising: an image display device which displays an image; an optical illumination means which irradiates the image display device, the optical illumination means having a light source unit; and a projection lens for projecting an enlarged image of the image display device; characterized in that an optical element is disposed between the image display device and the projection lens or within the projection lens and focusing is performed by moving the optical element in a direction which is substantially perpendicular to the optical axis of the projection lens. | 08-21-2008 |
| 20080231962 | Projection type zoom lens and projection type display apparatus - Disposed in order from a magnification side are a negative first group which is fixed during zooming to effect focusing, second to fifth groups of positive refractive power which move with mutual relationship during magnification variation, and a fixed sixth group. A negative lens made of a glass material which has an anomalous dispersion property and which has 70 or more in Abbe number is disposed in the first lens group. A positive lens made of a glass material which has an anomalous dispersion property and which has 70 or more in Abbe number is disposed in the third group located closer to a reduction side than a diaphragm. The negative lens and the positive lens are cemented to their adjacent lenses, respectively. Also, bf/fw≧2.7 is satisfied where bf denotes a back focus, and fw denotes a focal length of the entire system at a wide-angle end. | 09-25-2008 |
| 20080247049 | ZOOM LENS AND IMAGE PROJECTION APPARATUS - The zoom lens includes a plurality of lens units. The first lens unit is disposed closest to a magnification side in the plurality of lens units and has a negative optical power, and magnification-varying lens units that are disposed closer to a reduction side than the first lens unit and moves for variation of magnification. The first lens unit includes, in order from the magnification side, a first-A lens sub-unit having a negative optical power and a first-B lens sub-unit having a positive optical power. For focusing from an infinite side to a close side, the first-A and first-B lens sub-units move as a distance therebetween increases, and the first-B lens sub-unit moves toward the reduction side. The zoom lens is capable of correcting well variation of curvature of field due to a projection distance change and has a good optical performance. | 10-09-2008 |
| 20080252987 | Projection Objective For Microlithography - A projection objective for imaging a pattern arranged in an object surface of the projection objective into an image surface of the projection objective with a demagnified imaging scale has a plurality of optical elements which arc arranged along an optical axis of the projection objective and are configured in such a way that a defined image field curvature of the projection objective is set in such a way that an object surface that is curved convexly with respect to the projection objective can be imaged into a planar image surface. What can be achieved given a suitable setting of the object surface curvature is that a gravitation-dictated bending of a mask does not have a disturbing effect on the imaging quality. | 10-16-2008 |
| 20080285142 | PROJECTION ZOOM LENS - A projection zoom lens includes, from a screen side to an image source side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, a third lens group having a positive refractive power, a fourth lens group having a negative refractive power and a fifth lens group having a positive refractive power. Zooming the projection zoom lens from the wide-angle end to the telephoto end causes the second, third and fourth lens groups to move toward the screen side, and the first and fifth lens groups are kept stationary. The projection zoom lens may further include an auto iris being axially movable with the fourth lens group, a composite prism and a cover glass. The projection zoom lens satisfies several conditions so that it can effectively eliminate aberrations and improve the projection image quality. | 11-20-2008 |
| 20090009878 | PROJECTION LENS, IMAGE PROJECTION APPARATUS AND OPTICAL APPARATUS - The projection lens that projects a light flux from an object onto a projection surface. The projection lens includes a negative lens unit having a negative optical power, and a correction mechanism that tilts the negative lens unit with respect to an optical axis of the projection lens such that field tilt is generated in a direction opposite to a direction of field curvature generated at the projection surface. The projection lens reduces the generation of field curvature and its variation using a simple configuration. | 01-08-2009 |
| 20090015933 | Projection lens system - A projection lens system that has a compact configuration and is capable of correcting a color aberration. In the system, first and second lenses have a weak refractive power, respectively, and a third lens has a strong positive refractive power. A fourth lens corrects an aberration generated by the third lens, and a fifth lens has a negative refractive power. A diffractive optical element is formed on at least one among the surface of the first to fifth lenses. A color aberration and spherical aberration is corrected with the diffractive optical element, so that a high resolution can be realized without increasing the number of lenses and the manufacturing cost can be reduced. | 01-15-2009 |
| 20090015934 | PROJECTION ZOOM LENS DEVICE AND PROJECTION-TYPE DISPLAY APPARATUS - A projection zoom lens device includes, in order from a magnification side, a negative first group G | 01-15-2009 |
| 20090059384 | PROJECTION LENS WITH HIGH RESOLUTION AND REDUCED OVERALL LENGTH - An exemplary projection lens includes, in this order from the magnification side to the minification side thereof, a negative lens group having negative fraction of power, and a positive lens group having positive fraction of power. The positive and negative lens groups each include a number of positive and negative lenses. The focal length of the projection lens is adjustable. The projection lens satisfies the formulas of: −256, where F1, and F2 respectively represent the effective focal lengths of the negative lens group and the positive lens group, Fw is the shortest effective focal length of the projection lens, and Vg2 is the average of the Abbe number of the positive lenses in the positive lens group. | 03-05-2009 |
| 20090059385 | PROJECTION OBJECTIVE HAVING A HIGH APERTURE AND A PLANAR END SURFACE - A projection objective for imaging a pattern provided in an object plane of the projection objective onto an image plane of the projection objective suitable for microlithography projection exposure machines has a plurality of optical elements transparent for radiation at an operating wavelength of the projection objective. At least one optical element is a high-index optical element made from a high-index material with a refractive index n≧1.6 at the operating wavelength. | 03-05-2009 |
| 20090103184 | LITHOGRAPHY PROJECTION OBJECTIVE, AND A METHOD FOR CORRECTING IMAGE DEFECTS OF THE SAME - Projection objectives, as well as related components, systems and methods, are disclosed. In general, a projection objective is configured to image radiation from an object plane to an image plane. A projection objective can include a plurality of optical elements along the optical axis. The plurality of optical elements can include a group of optical elements and a last optical element which is closest to the image plane, and a positioning device configured to move the last optical element relative to the image plane. Typically, a projection objective is configured to be used in a microlithography projection exposure machine. | 04-23-2009 |
| 20090161226 | MOBILE PHONE - A mobile phone ( | 06-25-2009 |
| 20090168189 | Projection optical system, exposure apparatus, and exposure method - A projection objective includes at least four curved mirrors, which include a first curved mirror that is a most optically forward mirror and a second curved mirror that is a second most optically forward mirror, as defined along a light path. In addition, an intermediate lens element is disposed physically between the first and second mirrors, the intermediate lens element being a single pass type lens. The objective forms an image with a numerical aperture of at least substantially 1.0 in immersion. | 07-02-2009 |
| 20090213470 | PROJECTION OPTICAL SYSTEM AND IMAGE DISPLAY DEVICE - A projection optical system, in which a plurality of light flux emitted from one conjugate plane enters another conjugate plane and an image formed on the one conjugate plane is projected on the other conjugate plane, includes: a first optical system including at least one lens; and a second optical system which includes at least two reflecting surfaces with optical power, a normal line of the other conjugate plane from a center of an image projected on the other conjugate plane has no intersection with any space of the first optical system, or the second optical system, or a space between the first optical system and the second optical system, and when a plane defined by a vertical direction of the image projected on the other conjugate plane and an extending direction of the normal line is set as a YZ plane, from the first optical system to the other conjugate plane an optical path intersects only once on the YZ plane. | 08-27-2009 |
| 20090231723 | WIDE ANGLE PROJECTION LENS SYSTEM AND METHOD - The disclosed embodiments relate to a system and method for wide angle image projection. An exemplary embodiment of the present invention comprises a video unit, comprising an imaging system configured to create a projected image, a lens group optically coupled to the imaging system to receive the projected image. The lens group including a lens doublet having a first positive crown element, a negative flint element affixed to the first positive crown element, and a second positive crown element adjacent to the lens doublet and facing the imaging system. The video unit further comprises a positive flint element optically coupled to the lens group to receive the projected image from the lens group, a physical stop disposed between the positive flint element and the lens group, and a negative crown meniscus optically coupled to the positive flint element to receive the projected image from the positive flint element, the negative crown meniscus adapted to produce a wide-angle representation of the projected image. | 09-17-2009 |
| 20090257129 | PROJECTION ZOOM LENS SYSTEM AND PROJECTION TYPE DISPLAY APPARATUS - A projection lens system includes, in order from the magnification side, a negative first group G | 10-15-2009 |
| 20100091379 | Wide-angle objective lens system and camera - A vehicle camera and wide-angle objective lens system are disclosed wherein the wide-angle objective lens has image aberrations or errors that do not deteriorate the detection of obstructions or obstacles in its field of view. | 04-15-2010 |
| 20100123955 | PROJECTION LENS SYSTEM AND PROJECTION TYPE DISPLAY APPARATUS USING THE SAME - A projection lens system includes, in order from the magnification side, a negative first lens group and a positive second lens group, and is telecentric on the reduction side. The first lens group includes a first lens formed as an aspheric lens which is disposed closest to the magnification side. The second lens group includes a second lens formed as a positive lens, in or near which an aperture diaphragm is disposed, disposed closest to the magnification side, and an aspheric lens. Between the aperture diaphragm and the aspheric lens of the second lens group, two or more negative lenses and two or more cemented surfaces are disposed. And, 0.10| 05-20-2010 | |
| 20100134897 | PROJECTING TYPE HYPER-LENS AND METHOD OF MANUFACTURING THE SAME - Disclosed are a projecting type hyper-lens and a method of manufacturing the same. The projecting type hyper-lens includes a main lens layer and a substrate layer. A front surface of the main lens layer is recessed. The substrate layer supports the main lens layer. A front central portion of the main lens layer protrudes beyond a surface of the substrate layer. The projecting type hyper-lens allows an object to move towards a front surface of the hyper-lens until a distance between the front surface of the hyper-lens and the object is smaller than a half-wavelength of light, and thus images an object smaller than a half-wavelength of used light. Evanescent waves scattered from an object is used in a manner convenient to a user. | 06-03-2010 |
| 20100157435 | LITHOGRAPHY PROJECTION OBJECTIVE, AND A METHOD FOR CORRECTING IMAGE DEFECTS OF THE SAME - Projection objectives, as well as related components, systems and methods, are disclosed. In general, a projection objective is configured to image radiation from an object plane to an image plane. A projection objective can include a plurality of optical elements along the optical axis. The plurality of optical elements can include a group of optical elements and a last optical element which is closest to the image plane, and a positioning device configured to move the last optical element relative to the image plane. Typically, a projection objective is configured to be used in a microlithography projection exposure machine. | 06-24-2010 |
| 20110007401 | PROJECTION VARIABLE FOCUS LENS AND PROJECTION DISPLAY DEVICE - A projection variable focus lens includes seven lenses. The seven lenses include first to seventh lenses in order from a magnification side. The first and second lenses are provided closest to the magnification side and have a negative composite refractive power. The third lens has a positive refractive power. The fifth lens has a negative refractive power. The sixth lens has a positive refractive power. The seventh lens has a positive refractive power. A reduction side of a lens system is telecentric. The seven lenses are classified into three or more lens groups. Three or less lens groups among the three or more lens groups are moved to change a focal length. When the focal length varies from a wide angle end to a telephoto end, at least the third lens is moved from the reduction side to the magnification side along an optical axis. | 01-13-2011 |
| 20110007402 | PROJECTION VARIABLE FOCUS LENS AND PROJECTION DISPLAY DEVICE - An inexpensive projection variable focus lens includes six lenses and three or less lens groups which are moved when power varies, is telecentric, and is capable of effectively reducing all aberrations including astigmatism. Also, a projection display device includes the projection variable focus lens. | 01-13-2011 |
| 20110038054 | OPTICAL SYSTEM AND OPTICAL APPARATUS HAVING THE SAME - An optical system includes, in order from an enlargement conjugate side to a reduction conjugate side via a largest air gap, a front unit having a negative power, and a rear unit having positive power. The optical system satisfies 1.75| 02-17-2011 | |
| 20110122503 | PROJECTING DEVICE AND LENS ADJUSTING MODULE THEREOF - The invention discloses a lens adjusting module for adjusting the position of a lens module. The lens adjusting module includes an input rod and an output rod, wherein the input rod is configured along a first direction and has an inclined surface. The output rod is configured along a second direction perpendicular to the first direction. The output rod has a first contact surface contacting the inclined surface, and a second contact surface contacting the lens module. When the input rod moves along the first direction, the first contact surface of the output rod moves along the inclined surface of the input rod, and the lens module moves with the output rod along the second direction. | 05-26-2011 |
| 20110134536 | Lens Assembly - A lens assembly includes a platform having an incident surface and a projection surface on opposite surfaces thereof. Wire holes are formed to the bottom side along a longer axis of the incident surface for wiring. A cut is formed around the incident surface for receiving waterproof ring. The incident surface has a main oval-shaped concave surface. Two symmetric oval-shaped lateral concave surfaces are formed to front two lateral sides of the main oval-shaped concave surface. The projection surface is formed by a plurality of continuous oval-shaped convex surfaces and discontinuous oval-shaped convex surfaces. Two symmetric vertical planes are formed to two lateral sides of the projection surface. The lens assembly capable of receiving LED larger than 10 mm has good distribution of a transverse maximum intensity of light occurring between ±50 to ±60 degrees and a vertical maximum intensity of light occurring between ±30 to ±40 degrees. | 06-09-2011 |
| 20110292515 | FIXED-FOCUS LENS - A fixed-focus lens disposed between a magnified side and a minified side. The fixed-focus lens has an optical axis and includes a reflective system and a refractive system. The reflective system includes a reflection mirror with a negative refractive power. The refractive system is disposed between the reflection mirror and the minified side and includes a first lens group and a second lens group. The first lens group has a positive refractive power. The second lens group is disposed between the first lens group and the minified side, and has a positive refractive power. The fixed-focus lens satisfies F/H>0.23, where F is an effective focal length and H is an image height. | 12-01-2011 |
| 20110299173 | ZOOM LENS FOR PROJECTION AND PROJECTION-TYPE DISPLAY APPARATUS - A zoom lens for projection includes a negative first group composed of two lenses, a second group composed of a positive lens, an aperture stop, a third group composed of a positive lens, a fourth group composed of a negative fourth-group-first lens, a fourth-group-second lens arranged in such a manner that a negative air lens is formed between the fourth-group-first lens and the fourth-group-second lens, and a positive fourth-group-third lens, and a fifth group composed of a positive lens having a convex surface facing the magnification side of the zoom lens, which are arranged in this order from the magnification side. Further, the following formula (1) is satisfied: | 12-08-2011 |
| 20120170132 | PROJECTION PRIME LENS - The present invention provides a projection prime lens including first lens group, a second lens group, and a third lens group arranged in sequence along an optical axis from a screen side to a light modulator side. The first lens group has negative refractive power and includes a first lens with negative refractive power and a second lens with negative refractive power. The second lens group has positive refractive power and includes a third lens with positive refractive power and a fourth lens with positive refractive power The third lens group has positive refractive power and includes a fifth lens with negative refractive power, a sixth lens with positive refractive power, and a seventh lens with positive refractive power. Therefore, the projection prime lens of the present invention has a small size and a good image quality. | 07-05-2012 |
| 20120170133 | PROJECTION LENS UNIT FOR PICO-PROJECTOR - A projection lens unit for a pica-projector includes a plurality of plastic lenses and a single glass lens to minimize a change in focal length due to the heat generated inside the pico-projector. The lens array includes:
| 07-05-2012 |
| 20120218643 | LENS BLANK AND LENS ELEMENTS AS WELL AS METHOD FOR THEIR PRODUCTION - A method for manufacturing a preferably asymmetrical lens element ( | 08-30-2012 |
| 20120307371 | Variable-Focal-Length Projection Lens System and Projection Apparatus - A variable-focal-length lens system for projection which achieves focusing by movement of the entire system has a second to a fourth lens group as focal-length-varying lens groups and a first lens group as a distance-compensation lens group. The second to fourth lens groups individually move in the optical axis direction to vary the group-to-group distances so as to vary the focal length of the entire system. During focusing, the first lens group moves in the optical axis direction such that, as the projection distance varies from a remote distance to a close distance, curvature of field varies to the under side. | 12-06-2012 |
| 20130250434 | PROJECTION OBJECTIVE LENS SYSTEM - A projection objective lens system includes from an object plane to an image plane: a first lens group (S | 09-26-2013 |
| 20130258491 | PROJECTION LENS ASSEMBLY WITH SIX LENSES - A projection lens assembly with six lenses, suitable for being applied to a pico projector projecting vivid and clear images. The projection lens assembly comprises six lenses, that is, a first lens having a minus focal distance, a second lens having a positive focal distance, a third lens having a minus focal distance, a fourth lens having a positive focal distance, a fifth lens having a positive focal distance and a sixth lens having a positive focal distance arranged in sequence and with spaces therebetween, an aperture stop between the second lens having the positive focal distance and the third lens having the minus focal distance, a reflective liquid-crystal panel behind the sixth lens having the positive focal distance, wherein the front sixth lens having the positive focal distance has a greater area than that of the rear reflective liquid-crystal panel. | 10-03-2013 |
| 20140092483 | PROJECING LENS AND OPTICAL ENGINE - A projection lens disposed between an enlarged side and a reduced side is provided. The projection lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are sequentially arranged from the enlarged side to the reduced side. Refractive powers of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are respectively negative, positive, positive, negative, positive and positive. A focal length of the third lens is greater than or equal to 20 mm and is less than or equal to 200 mm. An optical engine is also provided. | 04-03-2014 |
| 20140104694 | PROJECTION LENS UNIT FOR PICO-PROJECTOR - A projection lens unit for a pico-projector includes a plurality of plastic lenses and a single glass lens to minimize a change in focal length due to the heat generated inside the pico-projector. The lens array includes:
| 04-17-2014 |
| 20140118838 | Wide Angle Projection Lens - The present invention uses the concave hybrid architecture to form a wide angle projection lens with large numerical aperture. The wide angle projection lens includes a refraction system and a reflection system, wherein the refraction system includes a first lenses group containing a plurality of spherical lenses and at least one spherical lenses, and a second lenses group containing at least two aspheric lenses and at least one spherical lens, and the at least one spherical lens is configured between any two of the at least two aspheric lenses. The present invention is beneficial in reducing the wide angle projection lens in size and is able to effectively overcome the problem in low geometric efficiency, and enable the ultra-short focus projector have compact and portable advantages. | 05-01-2014 |
| 20140192419 | OPTICAL SYSTEM AND IMAGE PROJECTION APPARATUS INCLUDING THE SAME - In an optical system including a front lens unit having negative refractive power, a stop, and a rear lens unit having positive refractive power in order from an enlargement side to a reduction side, the front lens unit has a combination lens in which a negative lens and a positive lens are adjacently arranged in order from the enlargement side to the reduction side, and a focal length of the negative lens f | 07-10-2014 |
| 20140307327 | PROJECTION LENS AND PROJECTION DISPLAY APPARATUS - A projection lens that projects image information displayed on the reduction side conjugate position onto the magnification side conjugate position includes an aspherical lens having a positive refractive power that satisfies predetermined conditional expressions and, when the back focus of the entire system is taken as Bf, the focal length of the entire system is taken as f, the maximum effective image circle diameter on the reduction side is taken as Imφ, and the distance from the reduction side conjugate position to the reduction side pupil position is taken as dexp, satisfies conditional expressions (6): Bf/f>2 and (7): 0.5<|Imφ/dexp|<1. | 10-16-2014 |
| 20140307328 | PROJECTION LENS AND PROJECTION TYPE DISPLAY DEVICE - When a single lens which includes a surface having the smallest effective beam diameter or a cemented lens is designated as a reference lens, a system substantially consisting of lenses disposed closer to a magnification side than the reference lens is designated as a front group, and a system substantially consisting of lenses disposed closer to a reduction side than the reference lens is designated as a rear group, the projection lens satisfying conditional expressions (1) and (2) given below as well as conditional expressions (3) and (4): | 10-16-2014 |
| 20140355127 | PROJECTION LENS AND PROJECTION DISPLAY APPARATUS - A projection lens is provided having a positive refractive power as a whole and including a correction group consisting of a plurality of lens groups that corrects field curvature by moving in an optical axis direction and changing the distance between each lens group. The conjugation length of a combined optical system combining the most magnification side lens group constituting the correction group to the most reduction side lens group constituting the correction group in the projection lens is constant before and after the movement of the correction group for correcting field curvature. If the projection lens is variable in magnification or focusable by moving at least some of the lens groups, the movement of the correction group for correcting field curvature is allowed to be performed independently of the movement for either changing magnification or focusing. | 12-04-2014 |
| 20150116840 | PROJECTION LENS - A projection lens for a projection device having a light valve is provided. The light valve provides an image light beam. The projection lens includes a first lens group, a second lens group and a reflecting lens group. The second lens group is disposed between the first lens group and the reflecting lens group. The first lens group has positive refractive power. The second lens group has positive refractive power and includes a plurality of lenses and an aperture stop located between the lenses. An angle of a field of view of the second lens group is less than 100 degrees. The reflecting lens has negative reflective power and has a curved reflecting surface to reflect the image light beam passed through the second lens group. | 04-30-2015 |
| 20150323766 | PROJECTION LENS AND PROJECTION DISPLAY APPARATUS - A projection lens includes a compound aspherical lens in which a resin layer is formed on a surface of a glass lens and a lens surface of the resin layer on the air contacting surface side has an aspherical shape. If the glass transition temperature of the resin layer is taken as Tg and its unit is taken as ° C., Tg of at least one of the resin layers is 150| 11-12-2015 | |
| 20150362709 | Projection Lens - A projection lens includes a first lens group and a second lens group, all of which are arranged in sequence from a projection side to an image source side along an optical axis. The first lens group is with positive refractive power. The second lens group is with positive refractive power and includes a first lens, a second lens, a third lens and a fourth lens, wherein the first lens is with negative refractive power, the second lens is with positive refractive power, the third lens is with positive refractive power and the fourth lens is with positive refractive power. The first lens and the second lens are cemented together to form a cemented lens, the cemented lens is with negative refractive power. The first lens satisfies: −0.579≦f | 12-17-2015 |
| 20150378135 | PROJECTION LENS ADJUSTMENT MODULE AND PROJECTOR USING THE SAME - A projection lens adjustment module applicable to a projection lens is provided. The projection lens includes a first assembly and a second assembly. The projection lens adjustment module includes a flexible connection line, an adjusting element and a driving mechanism. The flexible connection line has a first end and a second end opposite to each other. The adjusting element is connected to the first end. The driving mechanism is connected to the second assembly and the second end. When the adjusting element drives the first end to move along a first direction thereby leading the second end to move along a second direction non-parallel to the first direction, the second end drives the second assembly to move along an optical axis direction of the projection lens relative to the first assembly through the driving mechanism. | 12-31-2015 |
| 20170235089 | PROJECTION LENS BARREL AND PROJECTION DISPLAY DEVICE | 08-17-2017 |
| 359650000 | Having four components | 9 |
| 20080310029 | Method for Improving the Imaging Properties of a Projection Objective, and Such a Projection Objective - The invention relates to a method -for improving the imaging properties of a micro lithography projection objective ( | 12-18-2008 |
| 20090009879 | LIGHT PIPE ASSEMBLY INCLUDING A PLURALITY OF LENSES AND RELATED PROJECTOR SYSTEM - A light pipe assembly includes a lens set and a holder. The lens set includes a first lens, a second lens, a third lens, and a fourth lens. The first lens has a first surface and a fifth surface adjacent to the first surface. The second lens has a second surface and a sixth surface adjacent to the second surface, and the fifth surface covers the second surface. The third lens has a third surface and a seventh surface adjacent to the third surface, and the sixth surface covers the third surface. The fourth lens has a fourth surface and an eighth surface adjacent to the fourth surface. The seventh surface covers the fourth surface and the eighth surface covers the first surface. Furthermore, the holder is used for encompassing and abutting the lens set. | 01-08-2009 |
| 20090073571 | PROJECTING LENS SYSTEM - A projecting lens system includes a first lens positive in power, a second lens negative in power, a third lens positive in power, and a fourth lens positive in power. The projecting lens system meets a criteria of 1.4| 03-19-2009 | |
| 20090153978 | Projection lens and projection device using the same - A projection lens and a projection device using the same are provided. The projection device comprises a projection lens and an optical element. The projection lens comprises a first lens group and a second lens group from an image side sequentially. The first lens group has a negative refracting power, and the first lens group includes an aspherical lens surface. The second lens group has a positive refracting power. The first lens group has a first focal length f | 06-18-2009 |
| 20090316276 | PROJECTION LENS SYSTEM - An exemplary projection lens system includes, in order from the magnification side to the reduction side thereof, a first lens with negative refraction power, a second lens with positive refraction power, a third lens with negative refraction power, and a fourth lens with positive refraction power. The projection lens system satisfies the formulae 3.71.41; where TT is a total length of the projection lens, f is an effective focal length of the projection lens system and BFL is a back focal length of the projection lens system. | 12-24-2009 |
| 20110249343 | LENS SYSTEM AND DISPLAY DEVICE - There is provided a lens system ( | 10-13-2011 |
| 20130235464 | WIDE-ANGLE PROJECTION LENS FOR PROJECTION DISPLAY SYSTEMS - Wide-angle projection lens, as well as optical engines and projection display devices comprising such projections lens are described. In one embodiment, a wide-angle projection lens is described comprising in sequential order from a screen side a first lens group of negative refractive power, a second lens group of positive refractive power, a third lens group of positive refractive power; and a fourth lens group of positive refractive power. At least one lens group has an aspheric surface. The ratio of the focal length of the wide-angle projection lens (F) to the focal length of each of the lens groups (F | 09-12-2013 |
| 20130286484 | PROJECTION LENS AND PROJECTION DISPLAY APPARATUS - A projection lens for projecting image information displayed on a reduction side conjugate position to a magnification side conjugate position, including a negative first lens group, a positive second lens group, a positive third lens group, and a positive fourth lens group arranged in this order from the magnification side, which satisfies predetermined conditional expressions. | 10-31-2013 |
| 20140043690 | PROJECTION LENS AND PROJECTION-TYPE DISPLAY APPARATUS USING THE LENS - To provide a projection lens that is compact, lightweight, low-cost, and readily portable, a first lens having a positive power and at least one surface that is an aspheric surface; a second lens having a negative power and having a concave surface on the magnification side; a third lens having a positive power and having a convex surface on the reduction side; and a fourth lens having a positive power are arranged in order from the magnification side. In addition to arranging the lenses telecentrically on the reduction side, the following formulas are satisfied simultaneously, and images formed on the conjugation surface on the reduction side are enlarged and projected on the conjugation surface on the magnification side: formula (A) 0.8| 02-13-2014 | |
| 359651000 | Having less than four components | 3 |
| 20080291542 | PROJECTION LENS DEVICE AND PROJECTION DISPLAY APPARATUS USING THE SAME - A projection lens device includes, in order from a magnification side, a first lens group G | 11-27-2008 |
| 20090080086 | SYMMETRICAL OBJECTIVE HAVING FOUR LENS GROUPS FOR MICROLITHOGRAPHY - The invention features a system for microlithography that includes a mercury light source configured to emit radiation at multiple mercury emission lines, a projection objective positioned to receive radiation emitted by the mercury light source, and a stage configured to position a wafer relative to the projection objective. During operation, the projection objective directs radiation from the light source to the wafer, where the radiation at the wafer includes energy from more than one of the emission lines. Optical lens systems for use in said projection objective comprise four lens groups, each having two lenses comprising silica, the first and second lens groups on one hand and the third and fourth lens groups on the other hand are positioned symmetrically with respect to a plane perpendicular to the optical axis of said lens system. | 03-26-2009 |
| 20120275029 | PROJECTION LENS, OPTICAL APPARATUS INCLUDING PROJECTION LENS, AND METHOD FOR MANUFACTURING PROJECTION LENS - A projection lens PL comprises, in order from a projection side: a first lens component L1 which has positive refractive power and is biconvex; a second lens component L2 which has negative refractive power and is meniscus; and a third lens component L3 which has positive refractive power and has a convex lens surface facing the projection side, lens surfaces on the projection side and an object side of the first lens component L1 and lens surfaces on the projection side and the object side of the second lens component L2 being aspherical, and the following conditional expression being satisfied: | 11-01-2012 |
