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)
05/1983
05/10/1983US4382661 Zoom lens barrel capable of close up photography
04/1983
04/19/1983US4380377 Compact zoom lens
04/19/1983US4380376 Zoom objective
04/19/1983US4380375 Wide angle zoom lens of two-group construction
04/19/1983US4380374 Variable focal length projection lens for use on overhead projectors
03/1983
03/22/1983US4377325 Bright and compact optical-compensation type zoom lens system
02/1983
02/08/1983US4372663 Rear aperture converter
02/08/1983US4372654 Telephoto zoom lens
01/1983
01/25/1983US4370031 Zoom objective of small size
01/18/1983US4368955 Variable-focal-length objective
01/18/1983US4368954 Compact zoom objective
01/18/1983US4368953 Zoom lens system
01/11/1983US4367927 Zoom lens system
01/04/1983CA1138695A1 Zoom optical system
12/1982
12/21/1982US4364642 Zoom element focusable zoom lens
12/21/1982US4364641 Wide angle zoom lens
11/1982
11/23/1982US4360835 Television camera objective having driving mechanism for adjusting components of its optical system
11/16/1982US4359270 Zoom lens
11/16/1982US4359269 Variable power copying lens system
10/1982
10/27/1982EP0063425A1 Variable focal length projection lens for use on overhead projectors
10/19/1982US4354743 Attachment lens system
09/1982
09/21/1982US4350416 Compact zoom lens
09/21/1982US4350415 Auxiliary lens system for overhead projectors
09/07/1982US4348082 Zoom lens having high zoom ratio including wide angle range
08/1982
08/24/1982US4345822 Telephoto zoom lens
08/24/1982US4345821 Zoom lens
07/1982
07/27/1982US4341435 Stereoscopic microscope for multiple observation
07/20/1982US4340279 Rear attachment lens
06/1982
06/29/1982US4336996 Variable-focal-length objective and an optical system equipped with objectives of this type for the production of special effects on film
06/29/1982US4336983 Photographic objective stabilized against change of angular field during focusing
06/08/1982US4333711 Zoom lens for copying
06/01/1982US4332444 Photographic lens capable of photographing the magnifications
05/1982
05/25/1982US4331389 Compact zoom lens system
05/25/1982US4331388 Gas zoom lens
05/18/1982US4330181 Compact zoom lens
05/18/1982US4330180 Zoom lens system having a plural number of relay lenses
05/11/1982US4329578 Optical imaging system having variable focal length
05/11/1982US4329040 Signal transmitting device of an intermediate lens barrel of a camera
05/11/1982US4329022 Two group type zoom lens with wide image angle
04/1982
04/27/1982US4326788 Information transmission means in an intermediate lens tube for camera
04/06/1982US4323302 Wide-angle zoom lens system
03/1982
03/16/1982US4319810 Four-group lens
03/09/1982US4318593 Zoom lens assembly with two movable focusing lens groups
03/09/1982US4318592 Lens system with attachment lens removably attached
03/09/1982US4318585 Optical system with an afocal focusing group
02/1982
02/16/1982US4315669 Wide-angle zoom lens system
02/09/1982US4314752 Mount device of a focal length changing auxiliary lens
01/1982
01/26/1982US4312572 Focusing objective lens system for endoscopes
01/12/1982US4310231 Close-up copy photography apparatus
12/1981
12/30/1981EP0042687A1 A focusing means for a zoom lens system
12/29/1981US4307943 Close focusing zoom lens
12/29/1981CA1115101A1 Holographic stepwise zoom lens
12/22/1981US4306776 Zoom lens having three movable lens groups
12/08/1981US4304466 Zoom lens
12/08/1981CA1113753A1 Optical viewer with selected magnification
12/01/1981US4303312 Photographic objective of continuously variable focal length
12/01/1981US4303311 Short distance zoom lens system
11/1981
11/17/1981US4300812 Optical system for endoscopes
11/10/1981US4299454 Wide angle to long focus zoom lens
11/10/1981US4299453 Zoom lens system with movable diaphragm
11/10/1981US4299452 Zoom lens having two movable lens groups
11/03/1981US4298251 Dual macro zoom optical system
10/1981
10/27/1981US4297007 Optical apparatus and method for changing a zoom camera to a fixed focus camera
10/13/1981US4294521 Rear stop type zoom lens
09/1981
09/23/1981EP0036341A1 Optical system for the realization of special effects on films
09/02/1981EP0034947A1 Multi-element lens system
09/01/1981US4286845 Zoom lens barrel capable of close up photography
08/1981
08/18/1981US4284331 Photographic objective having a focusing control with prevention of change in angular field of view
08/04/1981US4281906 Zoom lens
07/1981
07/14/1981US4278331 Photographic objective which prevents variation in angular field of view during focusing
07/14/1981US4278330 Catadioptric virtual-zoom optical system
06/1981
06/17/1981EP0030325A2 Stereomicroscope for simultaneous use by several observers
06/16/1981US4273423 Zoom lens barrel assembly for constant magnification
06/16/1981US4273414 Zoom lens
06/02/1981US4270848 Image enlarging optical variator
05/1981
05/26/1981US4269484 Varifocal optical system
05/12/1981US4266860 Wide angle zoom lens system having shortened closeup focal length
05/05/1981CA1100344A2 Optical beam projector
04/1981
04/28/1981USRE30592 Large aperture extended range zoom lens
04/28/1981US4264151 Optical adaptor for movie and television cameras
04/14/1981US4261648 Pancratic objective
03/1981
03/17/1981US4256381 Zoom lens
03/17/1981US4256371 Zoom lens with extended variable focal length range
03/10/1981US4255020 Zoom lens system capable of macrophotography
03/04/1981EP0024326A1 Afocal optical device
03/03/1981US4253736 Combination lens system with attachment lens
02/1981
02/17/1981US4251132 Compact standard zoom lens
02/10/1981US4249798 Miniature camera with zoom lens
02/10/1981US4249793 Erect type zoom telescopic optical system
01/1981
01/27/1981US4247168 Zoom lens for photographic printers
01/20/1981US4245891 Zoom lens system with a movable distortion-correcting element
01/07/1981EP0020914A1 Optical reproduction system with variable focal length, in particular a zoom objective for photographic cameras
12/1980
12/30/1980US4241981 Compact wide angle zoom lens
12/23/1980US4240700 Wide angle zoom lens having a high variation ratio
12/23/1980US4240699 Zoom lens having extended focusing range
12/23/1980US4240698 Large aperture zoom lens
12/23/1980US4240697 Lens system having selectively shiftable focal length
12/16/1980US4239340 Conversion lens system
12/16/1980US4239339 Varifocal objective for photographic camera
12/02/1980US4236789 Projection optical system
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