Patent application number | Description | Published |
20080239505 | ZOOM LENS AND IMAGER APPARATUS - A zoom lens comprises first, second, third and fourth lens groups in order from an object side, so as to change magnification by changing a spacing between the lens groups. The first lens group has a positive refractive power as a whole and comprises, in order from the object side, a negative meniscus lens, a reflecting member that bends an optical path nearly 90 degrees and a positive lens of a resin material having at least one aspheric surface. The second lens group has a negative refractive power as a whole and comprises a negative lens of a resin material on an most object side of the second lens group. A conditional expression given below is satisfied provided that P | 10-02-2008 |
20080239510 | IMAGING LENS, CAMERA MODULE, AND PORTABLE TERMINAL APPARATUS - An imaging lens comprises, in order from an object side: a first lens having a positive refractive power and a meniscus shape and having a convex surface directed to the object side; a second lens having a negative refractive power in the vicinity of an optical axis of the imaging lens; and a third lens having a positive refractive power in the vicinity of the optical axis, wherein at least one surface of each of the second lens and the third lens is an aspheric surface; and the imaging lens satisfies the following conditional expression expressions: | 10-02-2008 |
20080291551 | IMAGING LENS - An imaging lens includes, in order from an object side, a first lens having a positive refractive power and having a meniscus shape with a convex surface directed to the object side thereof, a second lens having a concave object-side surface and a third lens having a negative refractive power in a vicinity of an optical axis. Each of the second and third lenses has at least one aspheric surface. The following conditional expressions are satisfied: | 11-27-2008 |
20090002839 | BIFOCAL IMAGING OPTICAL SYSTEM AND IMAGING APPARATUS - A configuration where a first group having a positive refractive power and a positive second group having a positive refractive power are placed sequentially from the object side is basically used. As the first group, a wide-angle first group and a telephoto first group are selectively switched over to be placed on the optical axis, thereby switching over the focal length between the wide-angle side and the telephoto side. Since the configuration in which the first group placed on the object side is switched is employed, adherence of dust or the like to the imaging surface due to the switching of the focal length can be prevented from occurring. Each group is configured by a minimum number of lenses. The whole system has a configuration which has a reduced number of lenses, and which is small and simple. | 01-01-2009 |
20090027779 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens is provided and includes: in order from the object side, a first lens group having a positive power and including in order from the object side, a negative lens, a reflecting member that bends an optical path by substantially 90°, and a positive lens having biconvex shape which has at least one aspherical surface; a second lens group having a negative power and including two lenses; a third lens group having a positive power; and a fourth lens group having a positive power and including in order from the object side, a cemented lens having a negative power and a positive lens having a meniscus shape which has at least one aspherical surface and a convex surface on the object side. The zoom lens is adapted to change a magnification thereof by moving the second lens group and forth lens group, and satisfies specific conditional equations. | 01-29-2009 |
20090147097 | IMAGING SYSTEM, IMAGING APPARATUS, PORTABLE TERMINAL APPARATUS, ONBOARD APPARATUS, MEDICAL APPARATUS AND METHOD OF MANUFACTURING THE IMAGING SYSTEM - An imaging system is provided and includes an imaging lens and an imaging device such that the maximum diameter of an effective region of a point image covers three or more pixels of light receiving pixels, the point image being projected onto a light receiving surface through the imaging lens from an intended position. A signal processing unit executes restoration processing on first image data output from the imaging device, and the restoration processing is executed to generate second image data equivalent to the first image data output from the imaging device when the resolving power of the imaging lens is higher. The imaging lens has a first lens group having a positive power, a second lens group having a negative power, and a third lens group in which a lens positioned closest to an image side has a positive power, in order from the object side. | 06-11-2009 |
20090268307 | ZOOM LENS AND IMAGING APPARATUS - A zoom lens is provided and includes: in order from an object side of the zoom lens, a first lens group adapted to be fixed during power-varying of the zoom lens, the first lens group having a positive power and including in order from the object side, a negative lens, a reflecting member that bends an optical path thereof, and a biconvex lens of a positive lens made of a resin material and having at least one aspherical surface; a second lens group adapted to move during the power-varying, the second lens group having a negative power and including two lenses; a third lens group adapted to be fixed during the power-varying and including one positive lens; and a fourth lens group adapted to move during the power-varying and during focusing of the zoom lens, the fourth lens having a positive power and including in order from the object side, a cemented lens having a positive power, and a negative lens made of a resin material and having at least one aspherical surface and a concave surface on an image side of the fourth lens. | 10-29-2009 |
20100265355 | PHASE CORRECTION PLATE, IMAGING SYSTEM AND APPARATUS, MOBILE PHONE, IN-VEHICLE DEVICE, MONITOR CAMERA, ENDOSCOPIC APPARATUS, DIGITAL CAMERA, DIGITAL VIDEO CAMERA, AND LENS UNIT - A phase correction plate is mounted on an imaging lens. The phase correction plate is structured in such a manner that the phase difference of light that has passed a middle region of the phase correction plate is lower than the phase difference of light that has passed a peripheral region of the phase correction plate, and that in the peripheral region, the phase difference of light that has passed through the phase correction plate increases from the middle-region side of the peripheral region toward the periphery side of the peripheral region. | 10-21-2010 |
20110044673 | ZOOM LENS AND IMAGE PICKUP APPARATUS - Provided is a photographic lens which prevents lenses disposed in the front and the rear of a prism from physically interfering with each other and in which the optical axes of the prism and the lenses disposed in the front and the rear of the prism are precisely aligned with each other. A photographic lens is a zoom lens that deflects the optical path of a prism and performs zooming by moving a second lens group and a third lens group disposed in the rear of the prism. A notch having a circular shape is formed on the prism side of a negative lens adjacent to the prism along the outer periphery of the lens. During zooming, when the second lens group is moved to the position close to the prism, the edge of the second lens group is fitted into the notch. | 02-24-2011 |
20110261468 | LIGHT MODULATION PANEL AND IMAGING LENS - A light modulation panel is inserted into an optical path of an imaging lens composed of an image-forming optical system to make the imaging lens function as a depth-of-field-extended optical system. The light modulation panel has power that makes a peak position of defocus MTF when the imaging lens is used alone to function as the image-forming optical system and a peak position of defocus MTF when the imaging lens functions as the depth-of-field-extended optical system by insertion of the light modulation panel into the optical path of the imaging lens coincide with each other. | 10-27-2011 |