Patents
Sitemap › G02 - Optics › G02B - Optical elements, systems, or apparatus › G02B 15 - Optical objectives with means for varying the magnification
Patents for G02B 15 - Optical objectives with means for varying the magnification (11,929)
11/1980
11/26/1980EP0019262A1 High magnification optical system for endoscopes
11/11/1980US4232942 Optically compensated zoom lens
11/04/1980US4231636 Variable field curvature lens system
10/1980
10/28/1980US4230398 Zoom lens system
10/28/1980US4230397 Large aperture extended range zoom lens
09/1980
09/23/1980US4223981 Telephoto zoom lens
09/23/1980CA1086116A1 Zoom lens
08/1980
08/12/1980US4217033 Camera objective of variable focal length
07/1980
07/15/1980CA1081512A1 Variable magnification lens system
07/01/1980US4210387 Focus device for zoom lens
06/1980
06/24/1980CA1080010A1 Variable focal length reflector lens system
06/17/1980CA1079557A1 Zoom lens optical system
06/10/1980US4206971 Rear conversion lens
05/1980
05/27/1980US4204732 Focus adjusting mechanism for variable magnification device
04/1980
04/29/1980US4200358 Wide-angle type zoom lens
04/22/1980US4199217 Infra-red optical systems
04/15/1980US4198129 Varifocal lens system with three moving components
04/15/1980US4198128 Wide angle zoom lens system
04/15/1980US4198127 Wide angle zoom lens system having small distortion
04/15/1980US4198126 Zoom lens system capable of macrophotography
04/08/1980US4196970 Optical objective with extended varifocal range
04/08/1980US4196969 Zoom lens having a small distortion aberration
04/08/1980US4196968 Wide angle zoom lens system
04/01/1980US4195912 Zoom lens system
03/1980
03/18/1980USRE30231 Lens selection device
03/18/1980US4193667 Zoom lens system capable of constant magnification photography
03/18/1980CA1073717A1 Three-lens system providing a variable focal power along one principal meridian
03/11/1980US4192577 Zoom lens system
02/1980
02/26/1980US4190323 Wide angle zoom lens with high zoom ratio
02/19/1980US4189213 Zoom lens system
02/19/1980US4189212 Wide angle zoom lens system
01/1980
01/29/1980US4185893 Zoom lenses
12/1979
12/11/1979US4178076 Macro zoom lens
11/1979
11/13/1979US4174153 Varifocal objective with focal length adjustment
10/1979
10/30/1979US4172635 Zoom lens system
10/09/1979US4170402 Very compact wide-angle zoom lens system
10/02/1979US4169660 Wide-angle zoom lens system
09/1979
09/18/1979US4168110 Zoom lens having small distortion
07/1979
07/03/1979US4159865 Zoom lens system
06/1979
06/26/1979US4159165 Zoom lens
06/26/1979CA1057096A1 Multi-mode optical scanning system
06/05/1979US4157212 Large aperture miniature wide-angle zoom lens system
06/05/1979US4157211 Zoom lens having an easily changeable range of variable focal distance
05/1979
05/22/1979US4155629 Wide angle zoom lens system
05/15/1979US4154508 Rear conversion lens
05/08/1979US4153339 Zoom lens
05/08/1979US4153338 Wide-angle zoom lens system
05/08/1979US4153337 High-power zoom projection objective
04/1979
04/24/1979US4150883 Cineconversion machine
04/17/1979US4149775 Zoom lens apparatus with adjustable aperture
04/17/1979US4149774 Zoom lens system
04/10/1979US4148548 Temperature compensating focusing in infrared zoom lenses
04/03/1979US4147410 Two group wide angle zoom lens system
03/1979
03/27/1979US4146305 Variable lens which can have its focal distance range easily changed
03/20/1979US4145115 Zoom lens
03/06/1979US4142779 Zoom lens system
02/1979
02/27/1979US4141636 Zoom lens with movable diaphragm
01/1979
01/23/1979US4135786 Zoom lens system
01/02/1979US4132463 Zoom optical system
12/1978
12/12/1978US4129359 Extending attachment lens
11/1978
11/21/1978US4126377 Zoom optical system for microscopes
11/07/1978US4124275 Compact varifocal lens assembly
11/07/1978US4124274 Zoom lens having closeup focusing control
10/1978
10/31/1978CA1041336A1 Zoom lens
10/03/1978US4118108 Zoom objective, especially for a projector
09/1978
09/12/1978US4113356 Zoom lens system with high zooming ratio
09/12/1978US4113355 Macro zoom lens
08/1978
08/29/1978US4110006 Telephoto type zoom lens
08/29/1978US4110005 Wide-angle attachment for varifocal objective
08/29/1978CA1037547A1 Optical scanning system
08/08/1978US4105291 Large aperture zoom lens
07/1978
07/11/1978US4099847 Zoom lens system capable of close-up photography
07/11/1978US4099846 Variable magnification lens system
07/11/1978US4099845 Zoom lens with aberration variation prevented for focusing
07/11/1978US4099844 Variable focal lens having a divergent front element
06/1978
06/27/1978US4097124 Zoom lens
06/13/1978US4094587 Afocal front attachment for zoom objective
06/13/1978US4094586 Compact zoom lens
05/1978
05/16/1978US4089590 Zoom lens barrel having macro-photographing mechanism
05/02/1978US4087160 Camera objective of variable focal length
03/1978
03/21/1978US4080047 Lens system capable of wide range zooming and macrophotography
03/14/1978US4078857 Optical system
02/1978
02/28/1978US4076388 Zoom lens assembly
02/21/1978US4074931 Variable focal length lens system
02/14/1978US4073573 Zoom lens system
01/1978
01/03/1978US4066340 Basic lens assembly for series of zoom objectives of different varifocal ratios
12/1977
12/20/1977US4064520 Still photographic or movie camera
12/20/1977US4063800 Zoom lens for a projector
12/13/1977US4062621 Large aperture extended range zoom lens
12/06/1977US4061419 Variable magnification lens system
11/1977
11/29/1977US4060756 Automatic iris control means for variable focal length lens system
11/01/1977US4056308 Variable focal length reflector lens system
10/1977
10/18/1977US4054372 Focusing mechanism for varifocal objective
10/18/1977US4054371 Compact varifocal lens system capable of macrophotography
09/1977
09/27/1977US4050788 Basic lens for pancratic system
08/1977
08/23/1977US4043642 Zoom lens system having electrical control of moving elements
08/23/1977US4043641 Three-lens system providing a variable focal power along one principal meridian
07/1977
07/26/1977US4037937 Variable magnification lens system using symmetric lens of variable focal length
07/05/1977US4033674 Zoom lens having a wide magnification variation range
06/1977
06/14/1977US4029409 Multi-mode optical scanning system
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