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)
02/1991
02/26/1991US4995708 Photographic lens free from forming of ghost image
02/26/1991US4995707 Vari-focal lens system
02/19/1991US4993814 Zoom lens system
02/13/1991EP0412314A2 Infrared imaging system with a device for compensating the temperature effect on the focussing.
02/12/1991US4992809 Zoom finder system
02/12/1991US4991945 Zoom lens
02/12/1991US4991943 Compact zoom lens with high zoom ratio
02/12/1991US4991942 Zoom lens
02/05/1991US4989962 Dual band/dual FOV infrared telescope
02/05/1991US4989958 Focus adjusting apparatus provided with a focus lens member formed of polymer gel substance having electro-reactive deformability
01/1991
01/29/1991US4988176 Projection lens
01/29/1991US4988174 Zoom lens
01/29/1991US4988173 Modular afocal variator optical focusing system
01/22/1991US4986643 Lens system capable of close-up photographing
01/15/1991US4984877 High zoom-ratio/zoom lens system for use in a compact camera
01/15/1991US4984876 Zoom lens system
01/08/1991US4983027 Compact zoom lens system with a high zoom ratio
01/08/1991US4983026 Focal length changeable lens system
01/02/1991EP0405856A2 Zoom lens
01/02/1991EP0405532A2 Zoom lens
12/1990
12/25/1990US4979806 Zoom lens system
12/18/1990US4978204 High zoom-ratio zoom lens system for use in a compact camera
12/12/1990EP0401862A2 Zoom lens of rear focus type
12/12/1990EP0401264A1 A reprographic lens system and a reprographic camera comprising such a system
12/11/1990US4976522 Objective lens system for endoscopes
12/11/1990US4976521 Zoom lens system
12/04/1990US4974948 Optical device for varying magification
11/1990
11/27/1990US4973995 Camera system and attachment lens with integral lens sections
11/27/1990US4973143 Zoom lens system
11/20/1990US4971428 Catadioptric zoom lens
11/13/1990US4969721 Zoom lens system
11/01/1990WO1990013053A1 Continuously focusable optical system incorporating an afocal variator optical system
10/1990
10/31/1990EP0394877A2 Zoom lens system
10/16/1990US4963010 Compact zoom lens system
10/16/1990US4963005 Zoom lens having built-in diaphragm
10/11/1990DE4011280A1 Ancillary lens system for camera - is used for taking close-up pictures and is mounted in front of main objective lens system
09/1990
09/25/1990US4959728 Interchangeable lens and interchangeable lens system
09/11/1990US4955700 Small-size zoom lens system
09/04/1990US4953958 Variable magnification duplicator lens system
09/04/1990US4953957 Zoom lens system
08/1990
08/28/1990US4952039 Macro-adapted zoom lens system capable of high zoom ratio while covering wide angles
08/28/1990US4952038 Zoom lens system for use in compact camera
08/21/1990US4951074 Camera having zoom strobe device
08/14/1990US4948239 Zoom lens
08/14/1990US4948234 Zoom lens system
07/1990
07/03/1990US4938572 Zoom lens system for use in microfilm projection apparatus
06/1990
06/26/1990US4936661 Zoom lens with short back focal length
06/21/1990DE3842199A1 Refractor (refracting telescope) having variable refractive behaviour
06/20/1990EP0373719A1 Bifocal optical system
06/19/1990US4934796 Zoom lens
06/19/1990US4934795 Zoom lens
06/19/1990US4934794 Zoom lens system for use in microfilm projection apparatus
06/13/1990EP0372976A1 Zoom lens apparatus with lens units for zooming and focusing
05/1990
05/29/1990US4929069 Zoom lens
05/29/1990US4929068 Conversion lens
05/22/1990US4927250 Optical system for compensating chromatic abherration of image
05/15/1990US4925281 Zoom lens
05/15/1990US4925280 Vari-focal lens system
05/09/1990EP0367197A2 Dual band/dual FOV infrared telescope
04/1990
04/24/1990US4919524 Variable focus lens for image reproduction
04/17/1990US4917483 F.theta lens system with variable focal length
04/17/1990US4917482 Compact zoom lens system capable of high zoom ratio and having coverage of a wide visual field
04/03/1990US4913537 Vari-focal lens system with switchable auxiliary lens units
03/1990
03/27/1990US4911540 Zoom lens system
03/27/1990US4911539 Micro zoom lens
03/20/1990US4909615 Zoom lens system for use in an image projecting apparatus with kohler illumination
03/20/1990US4909614 Variable magnification finder
03/20/1990US4909613 Zoom lens
03/13/1990US4907867 Varifocal optical system and associated electro-mechanical control
03/13/1990US4907866 Objective of variable focal length
03/13/1990US4907865 Variable magnification duplicator lens system
03/06/1990US4906079 Zoom lens system
03/06/1990US4906077 Zoom lens system for use in a compact camera
02/1990
02/13/1990US4900141 Rear conversion lens
01/1990
01/30/1990US4896950 Zoom lens of high power varying ratio
01/18/1990DE3911664A1 Pancratic system
01/09/1990US4892397 Photographic lens having ghost image prevented from appearing
01/09/1990US4892396 Variable-focus optical device
01/02/1990US4890904 Zoom lens system capable of wide-angle viewing for high zoom ratio
12/1989
12/26/1989US4889416 Finite distance zoom lens
12/19/1989US4887891 Zoom lens system for use in microfilm projection apparatus
12/06/1989EP0344806A2 Drive mechanism for a zoom lens
11/1989
11/30/1989WO1989011670A1 Compact wide-angle close-focus zoom lens for single lens reflex camera
11/28/1989US4884140 Vignetting compensating circuit for a video camera
11/28/1989US4883346 Zoom lens system
11/23/1989DE3904190A1 Afocal pancratic system
11/22/1989CN1037404A Three-element symmetrical projection objective lens for enlarger
10/1989
10/31/1989US4877314 Objective lens system for endoscopes
10/17/1989US4874232 Imaging optical system
10/17/1989US4874231 Zoom lens
10/17/1989US4874230 Zoom lens with a variable power lens element
10/03/1989US4871243 Photographic lens of improved near distance performance
10/03/1989US4871241 Compact zoom lens system
10/03/1989US4871240 Zoom lens system having a lens unit with a variable refractive power
10/03/1989US4871239 Zoom lens system for minimal lens system length and minimal aberrations
10/03/1989US4871238 Photographic optical device with variable magnification
09/1989
09/19/1989US4867545 Telecentric image-forming system having varible magnifications
09/13/1989CN2044353U Multi-purpose jionter for endoscope camera
09/12/1989US4865434 Zoom lens capable of selecting a focal length beyond a standard focal length range
08/1989
08/29/1989US4861147 Zoom lens system
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