Patents
Sitemap › G02 - Optics › G02B - Optical elements, systems, or apparatus › G02B 13 - Optical objectives specially designed for the purposes specified below
Patents for G02B 13 - Optical objectives specially designed for the purposes specified below (20,651)
10/1981
10/13/1981US4294521 Rear stop type zoom lens
10/06/1981US4293197 Telephoto lens with small telephoto ratio
10/06/1981US4293196 Objective lens system with aspheric Fresnel elements
09/1981
09/29/1981US4291951 Compact type retrofocus lens
09/08/1981US4288148 Beam-splitting optical system
09/02/1981EP0034947A1 Multi-element lens system
09/01/1981USRE30728 High speed focusing telephoto lens
09/01/1981US4286848 Reproducing objective lens for videodiscs
09/01/1981US4286847 Lightweight inverted telephoto type wide angle lens system
08/1981
08/25/1981US4285579 Copying lens system
08/11/1981USRE30708 Telephoto objective
07/1981
07/29/1981EP0032499A1 Optical illumination and distortion compensator.
07/07/1981US4277128 Anamorphic Fθ lens system
06/1981
06/30/1981US4275962 Projection device
06/23/1981US4274733 Copying apparatus with stationary original support table and novel imaging lens system
06/23/1981US4274711 Bright photographic lens system with rear stop diaphragm
06/16/1981US4273424 Variable aberration lens system
06/09/1981US4272152 Unit magnification relay systems
06/02/1981US4270858 Scanning and projecting device
06/02/1981US4270843 Objective for video disks
06/02/1981US4270842 Optical system for forming an image of the retina
06/02/1981US4270837 Periscopic viewfinder system for use in photographic cameras
05/1981
05/26/1981US4269478 Constant-speed scanning lens system
05/26/1981US4269477 Symmetrical objective
05/20/1981EP0029005A2 Optical system for a night vision apparatus with an image intensifier or image converter
05/12/1981US4266860 Wide angle zoom lens system having shortened closeup focal length
05/12/1981US4266848 Optical system for night-vision glasses
04/1981
04/28/1981US4264139 Lens system for facsimile
04/28/1981US4264138 Photographic lens system
04/28/1981US4264137 Compact retrofocus type lens system
04/21/1981CA1099549A1 Exposure apparatus for copying machines
04/14/1981US4261645 Reflection preventive film having an aspherical layer
04/07/1981US4260223 Lens system for photographing objects from infinity to a very short distance
04/01/1981EP0025832A1 Beam-splitting optical system
03/1981
03/31/1981US4258985 Inverted telephoto type wide angle lens system
03/31/1981US4258981 Reproducing objective for video disks
03/31/1981US4258980 Retrofocus lens
03/24/1981US4257679 Reproducing objective for video disks
03/24/1981US4257678 Wide angle photographic lens
03/18/1981EP0025188A1 Optical arrangement for a photodetector
03/17/1981US4256374 Write and read objective lens for high density storage
03/17/1981US4256373 Fish eye lens system
03/17/1981US4256364 Two-dimensional scanning optical system with distortion correction
03/03/1981US4253736 Combination lens system with attachment lens
03/03/1981US4253735 Image forming optical system for semiconductor laser
03/03/1981US4253724 Recording optical system
02/1981
02/19/1981WO1981000499A1 Optical illumination and distortion compensator
02/17/1981US4251133 Large aperture telephoto-lens
02/17/1981US4251132 Compact standard zoom lens
02/10/1981US4249805 Composite photography system
02/03/1981US4249205 Aspheric projection lens system utilizing concave image
12/1980
12/30/1980US4241983 Telephoto lens
12/30/1980US4241981 Compact wide angle zoom lens
12/23/1980US4240704 Objective for video disks
12/23/1980US4240703 Telephoto lens
12/23/1980US4240701 All plastic projection lens assembly with aspheric surface
12/23/1980US4240699 Zoom lens having extended focusing range
12/10/1980EP0020006A1 Four-component lens and display apparatus including this lens
12/09/1980US4238675 Optics for infrared intrusion detector
12/02/1980US4236789 Projection optical system
11/1980
11/25/1980US4235521 Photographic lens system
11/25/1980US4235520 Wide-angle retrofocus lens system
11/25/1980US4235519 Compact retrofocus type wide angle objective
11/18/1980US4234894 Reflecting optical system for projection television
11/18/1980US4234891 Optical illumination and distortion compensator
11/18/1980US4234243 Reducing lens system
11/18/1980US4234240 Optical scanning system with unwanted reflections controlled
11/11/1980US4232943 Modified Petzval lens
11/11/1980CA1089262A1 System for synthesizing strip-multiplexed holograms
11/04/1980US4231636 Variable field curvature lens system
10/1980
10/15/1980EP0017466A1 A write and read objective lens
10/07/1980US4226500 Scanning optical system with reflective lens
10/07/1980CA1087006A1 Optical system for rotating mirror line scanning apparatus
10/01/1980EP0016227A1 Anamorphote wide-angle lens
09/1980
09/30/1980CA1086591A2 Radiant heat recouperator
09/23/1980US4223982 Semi-wide angle photographic lens having short overall length
09/23/1980CA1086116A1 Zoom lens
09/16/1980US4222634 Wide angle objective for examination of the eye
09/09/1980US4221467 Wide-angle photographic camera lens system
08/1980
08/20/1980EP0014549A1 Objective lens for reading videodiscs
08/19/1980US4218111 Holographic head-up displays
08/12/1980US4217034 Retrofocus type wide angle photographic lens
08/05/1980US4215933 Projection system for copying machines
08/05/1980US4215919 Refractor optical system
07/1980
07/29/1980US4214816 High speed telephoto lens system
07/29/1980US4214815 Semi-wide angle objective lens
07/29/1980US4214814 Variable soft focus lens system
07/29/1980CA1082504A1 Lens system for modifying spherical aberration
07/15/1980CA1081512A1 Variable magnification lens system
07/08/1980US4211472 Wide angle objective lens system
07/01/1980US4210388 Large-aperture wide-angle lens system for photographic cameras
06/1980
06/24/1980CA1080010A1 Variable focal length reflector lens system
06/17/1980US4208088 Multi-axial optical objective for an optical read head in a facsimile system
06/17/1980CA1079557A1 Zoom lens optical system
06/10/1980US4206977 Reproducing objective for video disks
06/10/1980US4206976 Compact telephoto lens
06/10/1980US4206975 Retrofocus type wide-angle lens system
06/10/1980US4206974 High resolution objective lens system
06/10/1980US4206973 Retrofocus type wide-angle objective
06/10/1980US4206972 High resolving objective covering a wide spectral r nge
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