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Class Information
Number: 359/426
Name: Optical: systems and elements > Compound lens system > Telescope > Focusing or relatively sliding barrels > Internal focusing
Description: Subject matter wherein the entrance and exit lenses remain a fixed distance apart while the telescope is focused.

Patents under this class:

Patent Number Title Of Patent Date Issued
8325415 Binocular telescope Dec. 4, 2012
8194314 Binoculars Jun. 5, 2012
8054545 Lens hood for a camera lens Nov. 8, 2011
7706063 Image capturing device with focusing assembly Apr. 27, 2010
7636210 Ocular focus device for a sight Dec. 22, 2009
7626760 Top angle focus scope Dec. 1, 2009
7359114 Clip-on night vision device Apr. 15, 2008
7259910 Focal device for a telescope Aug. 21, 2007
7251073 Pair of binoculars Jul. 31, 2007
6960749 Automatic focusing mechanism for mounting on measuring device Nov. 1, 2005
6891141 Surveying instrument having an optical distance meter and an autofocus system, and a surveying instrument having a detachable autofocus system May. 10, 2005
6734410 Surveying instrument having an optical distance meter and an autofocus system, and a surveying instrument having a detachable autofocus system May. 11, 2004
6580555 Adjustable eyepiece for a viewing device Jun. 17, 2003
6556283 Electronic distance meter Apr. 29, 2003
6266911 Autofocusing apparatus of a sighting telescope Jul. 31, 2001
6108129 Micro focuser Aug. 22, 2000
6057960 Modular infrared Kepler telescope May. 2, 2000
6014253 Binocular including focus and diopter adjustment of different lens groups Jan. 11, 2000
5923468 Surveying instrument having an automatic focusing device Jul. 13, 1999
5886815 Binoculars with dioptric and focus adjustment Mar. 23, 1999
5877892 Focus detecting apparatus for a telescope system Mar. 2, 1999
5838492 Method and apparatus for a binocular optical system Nov. 17, 1998
5796517 Inner focus type telescope Aug. 18, 1998
5572361 Binocular system with automatic diopter power adjustment Nov. 5, 1996
5329347 Multifunction coaxial objective system for a rangefinder Jul. 12, 1994
5311354 Telescope May. 10, 1994
4998357 Binocular telescopr with radially acting compensating spring Mar. 12, 1991
4650297 Binocular optical system with automatic focusing mechanism Mar. 17, 1987
4397520 Afocal refractor telescopes Aug. 9, 1983
4317029 Optics frame assembly Feb. 23, 1982
4023189 Wide angle fundus illumination and photography apparatus May. 10, 1977

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