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Class Information
Number: 359/673
Name: Optical: systems and elements > Lens > Selective magnification by exchanging or adding a lens component > To the front of a basic lens
Description: Subject matter wherein a lens component is exchanged or added to the objective side (i.e., front) of a basic lens for selective magnification.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7463424 |
Wide converter lens and image pickup apparatus equipped with the wide converter lens |
Dec. 9, 2008 |
| 7408718 |
Lens array imaging with cross-talk inhibiting optical stop structure |
Aug. 5, 2008 |
| 7289272 |
Optical system including an anamorphic lens |
Oct. 30, 2007 |
| 7170689 |
Front converter lens |
Jan. 30, 2007 |
| 7016114 |
Diffraction optical device and optical system including same |
Mar. 21, 2006 |
| 6831730 |
Optical magnification adjustment system and projection exposure device |
Dec. 14, 2004 |
| 6738195 |
Optical magnification adjustment system and projection exposure device |
May. 18, 2004 |
| 6661583 |
Close-up attachment lens |
Dec. 9, 2003 |
| 6654179 |
Wide converter lens system for both underwater and above-water use |
Nov. 25, 2003 |
| 6583939 |
Auxiliary imaging lens and imaging apparatus using the same |
Jun. 24, 2003 |
| 6504655 |
Wide converter lens |
Jan. 7, 2003 |
| 6493152 |
Wide converter lens |
Dec. 10, 2002 |
| 6449100 |
Teleconverter lens |
Sep. 10, 2002 |
| 6400515 |
Taking optical system, image taking apparatus, and method for converting frame-format in a taking optical system |
Jun. 4, 2002 |
| 6351336 |
Attachment lens for short distance shots |
Feb. 26, 2002 |
| 6288767 |
Imaging optical system |
Sep. 11, 2001 |
| 6181482 |
Variable ratio anamorphic lens |
Jan. 30, 2001 |
| 6124981 |
Attachment lens having diffraction surface |
Sep. 26, 2000 |
| 6104432 |
Compact image pickup lens system for a video camera |
Aug. 15, 2000 |
| 6097547 |
Front converter lens system using a diffractive surface |
Aug. 1, 2000 |
| 6011655 |
Eyepiece |
Jan. 4, 2000 |
| 6002533 |
Close-up attachment lens |
Dec. 14, 1999 |
| 5801886 |
Image magnification apparatus |
Sep. 1, 1998 |
| 5589976 |
Telescope with rear converter and rear conversion lens and telescope |
Dec. 31, 1996 |
| 5555132 |
Wide-conversion lens and a zoom lens with it |
Sep. 10, 1996 |
| 5555133 |
Objective lens for microscope |
Sep. 10, 1996 |
| 5528416 |
Compact multiple field-of-view attachment |
Jun. 18, 1996 |
| 5459615 |
Miniature fixed-focal-length lens system |
Oct. 17, 1995 |
| 5452133 |
Variator optical system |
Sep. 19, 1995 |
| 5329400 |
Focal length changeable lens |
Jul. 12, 1994 |
| 5218475 |
Attachment lens system |
Jun. 8, 1993 |
| 5216546 |
Attachment lens system for close-up photography |
Jun. 1, 1993 |
| 5214532 |
Afocal objective lens |
May. 25, 1993 |
| 5000556 |
Binocular telescope with auxiliary lens system |
Mar. 19, 1991 |
| 4929068 |
Conversion lens |
May. 29, 1990 |
| 4887109 |
Viewfinder for a camera with changeable focal length |
Dec. 12, 1989 |
| 4877314 |
Objective lens system for endoscopes |
Oct. 31, 1989 |
| 4854679 |
Photographic system having front conversion lens |
Aug. 8, 1989 |
| 4832470 |
Inverted galilean telescope type viewfinder system capable of changing over the magnification |
May. 23, 1989 |
| 4807982 |
Lens system of variable magnification range and having a supplementary lens unit |
Feb. 28, 1989 |
| 4791441 |
Multi-focus camera |
Dec. 13, 1988 |
| 4749264 |
Front conversion lens system |
Jun. 7, 1988 |
| 4725864 |
Vari-focal camera |
Feb. 16, 1988 |
| 4518227 |
Method of widening the angular field of a photographic objective lens |
May. 21, 1985 |
| 4482228 |
Lens changeover mechanism for use in photographic camera |
Nov. 13, 1984 |
| 4427268 |
Variable magnification ratio lens |
Jan. 24, 1984 |
| 4426135 |
Lens attchment for forming wide-ranging images |
Jan. 17, 1984 |
| 4391493 |
Method to increase focal distance at telephotographic side of a zoom lens system |
Jul. 5, 1983 |
| 4350415 |
Auxiliary lens system for overhead projectors |
Sep. 21, 1982 |
| 4236789 |
Projection optical system |
Dec. 2, 1980 |
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