Patent application number | Description | Published |
20090185283 | ZOOM LENS AND OPTICAL APPARATUS INCLUDING THE SAME - A zoom lens includes a first lens unit having a negative refractive power and a second lens unit having a positive refractive power, which are arranged in order from the object side to the image side. The zoom lens performs zooming by changing a distance between the lens units. The first lens unit includes a compound optical element including a lens element and a resin layer having optical characteristics different from optical characteristics of the lens element, the resin layer being laminated on the lens element. An Abbe number νdg of a material of the lens element, an Abbe number νdj of a material of the resin layer, and an anomalous partial dispersion ratio ΔθgFj of the material of the resin layer are adequately set. | 07-23-2009 |
20090273845 | OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING OPTICAL SYSTEM - Provided is an optical system in which chromatic aberrations can be excellently corrected in spite of environmental changes, to thereby maintain high optical performance. The optical system includes: a plurality of optical elements each having refractive surfaces located in a light incident side and a light exit side; and an aperture stop. A focal length, an Abbe number of a material, and an extraordinary partial dispersion ratio of each of an l-th optical element and an r-th optical element which satisfy a condition related to the extraordinary partial dispersion ratio are suitably set. | 11-05-2009 |
20100116973 | OPTICAL ELEMENT AND OPTICAL SYSTEM INCLUDING THE OPTICAL ELEMENT - An optical element is provided, which is small in distortion when at least three optical members including a resin layer sandwiched by the optical members are cemented together, has a high environmental resistance and optical performance, and has an excellent chromatic aberration correction effect. In the optical element, the resin layer is formed on one of light incident/exit surfaces of a first optical member, and a second optical member is cemented to the resin layer by a bonding material. A condition of φg<φr is satisfied where φr indicates an outer diameter of the resin layer and φg indicates an effective region diameter of a surface of the second optical member which is cemented to the resin layer. | 05-13-2010 |
20110019986 | OPTICAL APPARATUS HAVING OPTICAL ANTI-SHAKE FUNCTION - An optical apparatus of the present invention includes shake detectors | 01-27-2011 |
20110122513 | COMPOUND LENS AND OPTICAL SYSTEM INCLUDING THE SAME - A compound lens comprises three or more optical elements, including first, second, and third optical components, that are cemented together. The material of the second optical element is an organic composite material. The first optical element is cemented to one surface of the second optical element. The third optical element is disposed remotest from the first optical element in an optical axis. The diameters of effective areas of the first optical element on the cemented surface between the first and the second optical elements, and of the second optical element, and the distance ti(φ) between optically effective surfaces of the i-th optical element (i=1, 2, 3) along the optical axis at diameter φ are appropriately designed. The second optical element has such a shape that the decrease in the distance between its optically effective surfaces is small in a region outside the effective surface area. | 05-26-2011 |
20110299179 | OPTICAL SYSTEM AND OPTICAL APPARATUS INCLUDING THE OPTICAL SYSTEM - An optical system includes, in order from an object side to an image side, a first lens unit having a positive refractive power, an aperture stop, and a rear lens group. In the optical system, the rear lens group includes a second lens unit configured to move during focusing. The first lens unit includes n positive lenses (n is an integer greater than 1) and one or more negative lenses. With an order of an optical member counted from the object side towards the image side being indicated by i (i is an integer equal to or greater than 1), a refractive index and an Abbe number of a material of an i-th positive lens of the first lens unit with respect to d-line light (Ndi, νdi), maximum and minimum values of the Abbe number νdi (max(νdi), min(νdi)), a minimum value of the refractive index Ndi (min(Ndi)), a focal length of the first lens unit (fp), and a focal length of the entire optical system (f) are appropriately set. | 12-08-2011 |
20120092779 | OPTICAL SYSTEM WITH LONG FOCAL LENGTH AND OPTICAL APPARATUS HAVING THE SAME - An optical system, in order from an object side to an image side, includes a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a third lens unit having a positive or negative refractive power. The first lens unit is configured by a first partial lens unit and a second partial lens unit each having a positive refractive power. The first partial lens unit is configured by a positive single lens, and has at least one aspherical surface. The second partial lens unit is configured by a positive lens and a negative lens, and has a diffraction optical surface of a diffraction optical element rotationally symmetric with reference to an optical axis direction. The second lens unit is a focus lens unit that is movable in the optical axis direction. And a paraxial lateral magnification βasph meets a predetermined condition. | 04-19-2012 |
20130135514 | OPTICAL SYSTEM AND OPTICAL APPARATUS HAVING THE SAME - An optical system includes, in order from an object side to an image side, a front unit having a positive refractive power, an aperture diaphragm, and a rear unit. The front unit includes a first lens unit having a positive refractive power. The rear unit includes a second unit adjacent to the aperture diaphragm and configured to move in focusing. The first lens unit includes n (which is an integer of 2 or higher) positive lenses and one or more negative lenses. The materials of at least two positive lenses in the first lens unit satisfy 0.0100<ΔθgF where ΔθgF is an abnormal partial dispersion of each material. The material of the one or more positive lenses satisfies 0.0272<ΔθgF. Additional conditional expressions are satisfied. | 05-30-2013 |
20130169851 | OPTICAL SYSTEM AND OPTICAL APPARATUS HAVING THE SAME - An optical system includes, in order from an object side to an image side, a first lens unit of a positive refractive power, an aperture diaphragm, and a second lens unit of a positive refractive power. The first lens unit includes, in order from the object side to the image side, a cemented lens Lp | 07-04-2013 |
20140029109 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE SAME - A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a focus lens unit having a negative refractive power, configured to move in focusing, and a final lens unit having a positive refractive power, disposed closest to the image side. The focus lens unit and the final lens unit are disposed so as to be adjacent to each other, each lens unit moves so that a distance between adjacent lens units changes in zooming, and a focal length of the final lens unit f | 01-30-2014 |
20140098253 | ZOOM LENS AND IMAGE-PICKUP APPARATUS - A zoom lens includes, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a rear unit including a plurality of lens units. A distance between adjacent lens units changes during zooming. An aperture stop is arranged on an image side of the first lens unit. An image stabilizing unit Ls comprising at least part of the second lens unit moves in a direction perpendicular to an optical axis during blurring correction. The predetermined conditional expressions are satisfied. | 04-10-2014 |