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Browse by Category: Main > Optical & Optics
Class Information
Number: 359/421
Name: Optical: systems and elements > Compound lens system > Telescope > Selectable magnification
Description: Subject matter wherein the telescope includes means for step variations of the image size while the object distance remains constant.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8432610 Multi-magnification viewing and aiming scope Apr. 30, 2013
8049959 Scope with improved magnification system Nov. 1, 2011
7948677 Structure for supporting an optical telescope May. 24, 2011
7869125 Multi-magnification viewing and aiming scope Jan. 11, 2011
7768703 Dual field of view sighting system Aug. 3, 2010
7684114 Scope with improved magnification system Mar. 23, 2010
7471451 Multiple field of view optical system Dec. 30, 2008
6909541 Device capable of exchanging image projection direction Jun. 21, 2005
RE38224 Flat, hands-free, convertible keplerian binoculars Aug. 19, 2003
6577449 Telescopic zoom lens system Jun. 10, 2003
6424462 Binocular and method for manufacturing the same Jul. 23, 2002
6246516 Modular infrared kepler telescope Jun. 12, 2001
6219182 Multiple magnification stereo video telescope objective lens system Apr. 17, 2001
6118583 Optical imaging system Sep. 12, 2000
6057960 Modular infrared Kepler telescope May. 2, 2000
6002517 Flat, hands-free, convertible Keplerian binoculars Dec. 14, 1999
5969860 Optical System Oct. 19, 1999
5956177 Converter for polar-axis telescope Sep. 21, 1999
5953155 Optical system Sep. 14, 1999
5930034 Microscope with a telescopic function and method Jul. 27, 1999
5796518 Real image mode variable magnification finder optical system Aug. 18, 1998
5737119 Thermal imaging device Apr. 7, 1998
5726814 Multiple field of view changing apparatus for an optical system Mar. 10, 1998
5691842 Optical sight assembly Nov. 25, 1997
5673143 Thermal imaging device with selectively replaceable telescopic lenses and automatic lens identification Sep. 30, 1997
5598296 Prismatic telescope optical system Jan. 28, 1997
5570229 Real image mode variable magnification finder optical system Oct. 29, 1996
5563736 Compact real image finder Oct. 8, 1996
5552931 Finder optical system Sep. 3, 1996
5548442 Optical sight assembly Aug. 20, 1996
5548439 Three field of view refractive infrared telescope with fixed medium filed of view Aug. 20, 1996
5528847 Variable power telescopic sight Jun. 25, 1996
5485307 Binoculars Jan. 16, 1996
5479293 Portable magnification apparatus for conducting medical examinations Dec. 26, 1995
5321546 Switching variable magnification finder Jun. 14, 1994
5321548 Real image mode variable magnification finder optical system Jun. 14, 1994
5121220 Ocular turret telescope system Jun. 9, 1992
5052791 Variable magnification viewfinder optical system with variable magnification based on polarization Oct. 1, 1991
5000556 Binocular telescope with auxiliary lens system Mar. 19, 1991
4877317 Dual field of view catadioptric optical system Oct. 31, 1989
4838672 Function-conversion device for ground monocular telescope Jun. 13, 1989
4806005 Spotting system for binoculars and telescopes Feb. 21, 1989
4695119 Infrared optical system Sep. 22, 1987
4548481 Variable magnification observation optical device Oct. 22, 1985
4486069 Afocal telescopes Dec. 4, 1984
4479695 Afocal refractor telescopes Oct. 30, 1984
4469396 Afocal dual magnification refractor telescopes Sep. 4, 1984
4411488 Afocal zoom refractor telescopes Oct. 25, 1983
4397530 Objective with several fields Aug. 9, 1983
4260217 Panoramic periscope Apr. 7, 1981

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