Class / Patent application number | Description | Number of patent applications / Date published |
359432000 | Variable magnification | 19 |
20080198451 | WHOLE SYSTEM ZOOM AND VARIFOCAL LENS WITH INTERMEDIATE IMAGE - A lens system for forming a final image of an object, said system having an object side and an image side and forming a first intermediate real image between the object and final image, said system comprising a moving lens group containing the intermediate real image as the magnification of the final image is changed. The lens system is configured as a whole system so that optical aberrations at the intermediate real image, including field curvature, focus, astigmatism, distortion and color separation, are allowed to be of substantially greater magnitude than the corresponding optical aberrations of the final image. | 08-21-2008 |
20080198452 | Real-image variable magnification finder optical system and imaging apparatus - A real-image variable magnification finder optical system includes, in the order from an object side, an objective lens group having a positive refractive power, a member for forming an erect image from an image inverted by the objective lens group, and an eyepiece lens having positive refractive power. The objective lens group includes, in the order from an object side, a first lens group having a negative refractive power and a second lens group having positive refractive power to perform zooming and compensate a diopter change caused by the zooming by moving the first lens group and the second lens group in an optical axis direction. The objective lens satisfies a predetermined condition. | 08-21-2008 |
20080259450 | ILLUMINATION OPTICAL APPARATUS, RELAY OPTICAL SYSTEM, EXPOSURE APPARATUS, AND DEVICE MANUFACTURING METHOD - An illumination optical apparatus guides to an illumination object a light beam emitted from a light source. The illumination optical apparatus includes an enlarging optical system, disposed between the light source and the illumination object, and a reduction optical system, disposed between the enlarging optical system and the illumination object. The enlarging optical system is formed so that an image plane is disposed between the light source and the illumination object. | 10-23-2008 |
20090034067 | Three-unit zoom lens system and image pickup apparatus using the same - A three-unit zoom lens system includes in order from an object side thereof, a first lens unit G1 having a negative refracting power, a second lens unit G2 having a positive refracting power, a third lens unit G3 having a positive refracting power or a negative refracting power, and an aperture stop which is on an image plane side of the first lens unit G1, and on an object side of a lens surface nearest to the image side, of the second lens unit G2, and which moves integrally with the second lens unit. At the time of zooming from the wide angle end to the telephoto end, a distance between the first lens unit G1 and the second lens unit G2 is narrowed, and a distance between the second lens unit G2 and the third lens unit G3 changes. The second lens unit G2 moves toward the object side at the time of zooming from the wide angle end to the telephoto end. The second lens unit includes a positive lens made of plastic, which is disposed nearest to the object. The three-unit zoom lens system satisfies predetermined conditional expressions. | 02-05-2009 |
20090040604 | ZOOM LENS DEVICE AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens device includes, from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power. The zoom lens device is formed so that a distance Ximg between a position of the first lens unit at the wide-angle end and a position of the first lens unit that is maximally moved towards the image side, a distance Xobj between the position of the first lens unit at the wide-angle end and a position of the first lens unit that is maximally moved towards the object side, and a focal length fw of the zoom lens device at the wide-angle end are suitable values. | 02-12-2009 |
20090168163 | OPTICAL LENS SYSTEMS - Wide-angle, deep-field, close-focusing optical systems are disclosed. According to one aspect, the optical system comprises a negative lens unit and a relay lens. The negative lens unit accepts radiation from an object in space. The relay lens is coupled to the negative lens unit. The negative lens unit and the relay lens are aligned on an optical axis in that order. The negative lens units forms a first image on the relay lens to form a final image at a final image plane at a distance from the relay lens. The relay lens may comprise a zoom lens or zoom lens components, which may be movable. | 07-02-2009 |
20100259817 | VARIABLE POWER OPTICAL SYSTEM - Liquid lens cells are used in a compound variable power optical system that forms an intermediate image between the object and the final image. A first variable power optical component is located between the object and an intermediate real image. The first variable power optical component varies power to change the magnification of the intermediate real image. A second variable power optical component is located between the intermediate real image and the final image. The second variable power optical component varies power to change the magnification of the final image. At least one of the first and second variable power optical components is stationary on the optical axis and comprises at least two liquids with different refractive properties and at least one variable shape contact surface between the two liquids, with variations in the shape of the contact surface producing a change of optical power in the optical system. | 10-14-2010 |
20110109963 | RELAY ZOOM SYSTEM - A relay zoom system includes, in order from an object side, a first lens group having a positive refractive power and a second lens group having a positive refractive power. Furthermore, in the relay zoom system, the first lens group and the second lens group are each made up of at least two positive lenses and one negative lens. The first lens group and the second lens group in the relay zoom system are configured so as to move along an optical axis when magnification is varied from a lower magnification edge state to a higher magnification edge state. | 05-12-2011 |
20130044371 | Beam Shaping Unit For Focusing a Laser Beam - A beam shaping unit for focusing a divergent laser beam includes a first optical element to receive the laser beam, a second optical element to receive the beam from the first optical element, an optical focusing unit to receive the beam from the second optical element, a first focal point adjustment device coupled to the first optical element, the first focal point adjustment device being configured to adjust the beam focal point diameter by manipulating the first optical element, and a second focal point adjustment device coupled to the second optical element, the second focal point adjustment device being configured to adjust, in the beam propagation direction, the beam focal position by manipulating the second optical element, and in which the beam shaping unit is configured to image the beam from the first optical element through an intermediate focal point onto the second optical element. | 02-21-2013 |
20130222901 | Optical Lens Systems - Wide-angle, deep-field, close-focusing optical systems are disclosed. According to one aspect, the optical system comprises a negative lens unit and a relay lens. The negative lens unit accepts radiation from an object in space. The relay lens is coupled to the negative lens unit. The negative lens unit and the relay lens are aligned on an optical axis in that order. The negative lens unit forms a first image on the relay lens to form a final image at a final image plane at a distance from the relay lens. The relay lens may comprise a zoom lens or zoom lens components, which may be movable. | 08-29-2013 |
20130222902 | Sighting Apparatus Capable of Displaying Magnification - A sighting apparatus for displaying a magnification value is described. The sighting apparatus includes a magnification generation module, a controller and a display unit. The magnification generation module includes a magnification pattern, which has a plurality of magnification values, and a sensing unit. When the magnification pattern is rotated, the sensing unit detects one of the magnification values from the magnification pattern. The magnification generation module generates a magnification signal corresponding to the magnification value. The controller transforms the magnification signal and the display unit displays the magnification value corresponding to the magnification signal. | 08-29-2013 |
20140139913 | REAL-IMAGE VARIABLE-MAGNIFICATION VIEWFINDER AND IMAGING APPARATUS - A real-image variable-magnification viewfinder substantially consists of, in order from the object side: an objective lens system substantially consisting of a positive first lens, a negative second lens, a positive third lens, and a positive fourth lens; an erect optical system formed by a plurality of optical members; and a positive eyepiece lens system. The first lens and the third lens are fixed relative to the optical axis direction during magnification change, and the second lens and the fourth lens are moved in the optical axis direction during magnification change. All optical surfaces of all the optical members forming the erect optical system are planar surfaces. At least one of the optical members forming the erect optical system is made of a glass material. A predetermined conditional expression is satisfied. | 05-22-2014 |
20140247483 | SIGHTING APPARATUS CAPABLE OF DISPLAYING COMPENSATION POSITION - A sighting apparatus for displaying compensation position is described. The sighting apparatus includes a magnification adjustment module; a magnification generation module, which comprises a magnification pattern for undergoing a movement of the magnification pattern, and a sensing unit for detecting the magnification pattern to obtain a current magnification value; a display unit, for displaying the target in a reference position of the displaying unit when the sighting apparatus sights the target; and a controller coupled to the magnification generation module and the display unit respectively, for acquiring a first compensation position based on a range distance of the target, and for computing a ratio of the current magnification value and a predetermined magnification value of the sighting apparatus, wherein the controller generates a second compensation position based on the first compensation position and the ratio for displaying the second compensation position in the display unit. | 09-04-2014 |
20140285883 | VARIABLE POWER OPTICAL SYSTEM - Liquid lens cells are used in a compound variable power optical system that forms an intermediate image between the object and the final image. A first variable power optical component is located between the object and an intermediate real image. The first variable power optical component varies power to change the magnification of the intermediate real image. A second variable power optical component is located between the intermediate real image and the final image. The second variable power optical component varies power to change the magnification of the final image. At least one of the first and second variable power optical components is stationary on the optical axis and comprises at least two liquids with different refractive properties and at least one variable shape contact surface between the two liquids, with variations in the shape of the contact surface producing a change of optical power in the optical system. | 09-25-2014 |
20140307312 | Beam Shaping Unit For Focusing a Laser Beam - A beam shaping unit for focusing a divergent laser beam includes a first optical element to receive the laser beam, a second optical element to receive the beam from the first optical element, an optical focusing unit to receive the beam from the second optical element, a first focal point adjustment device coupled to the first optical element, the first focal point adjustment device being configured to adjust the beam focal point diameter by manipulating the first optical element, and a second focal point adjustment device coupled to the second optical element, the second focal point adjustment device being configured to adjust, in the beam propagation direction, the beam focal position by manipulating the second optical element, and in which the beam shaping unit is configured to image the beam from the first optical element through an intermediate focal point onto the second optical element. | 10-16-2014 |
20150103403 | ZOOM LENS SYSTEM AND IMAGING APPARATUS - A zoom lens system includes: a primary image forming lens group that forms light from an object side into an intermediate image and a relay lens group that forms light from the intermediate image into a final image. The primary image forming lens group includes, in order from the object side, a first fixed lens group G1 with negative refractive power, a stop St, and a second fixed lens group G2 with positive refractive power, and the relay lens group includes, in order from the object side, a third fixed lens group G3 with negative refractive power, a first moving lens group G4 with positive refractive power, and a second moving lens group G5 with positive refractive power. | 04-16-2015 |
20150116823 | FINDER OPTICAL SYSTEM - A finder optical system includes an image inverter optical member and an eyepiece lens system. The eyepiece lens system includes a negative first lens element, a positive biconvex second lens element, and a meniscus third lens element having a concave surface on the eyepoint side, in that order from the object side. A diopter adjustment operation is performed by moving the second lens element along the optical axis. Conditions (1) and (2) are satisfied: | 04-30-2015 |
20160077317 | Variable -Magnification Observation Optics - A variable-magnification observation optical system includes an objective system, an erecting system, and an eyepiece system. The objective system includes a positive first group, a positive second group, and a negative third group in order from the object side. The eyepiece system includes a positive fourth group and a positive fifth group in order from the object side. The erecting system is located between the first group and the second group. The fifth group includes in order from the object side a negative meniscus lens and a positive lens with an air gap therebetween wherein the negative meniscus lens has a concave surface facing the object. The fifth group has at least one aspheric surface. | 03-17-2016 |
20160170188 | Variable Magnification Observation Optical System | 06-16-2016 |