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Class Information
Number: 355/56
Name: Photocopying > Projection printing and copying cameras > Focus or magnification control > Automatic or semiautomatic focusing when varying image size
Description: Subject matter including means to automatically move the objective lens or lens system relative to the original and photosensitive paper for proper focusing when the original and photosensitive paper are moved relative to each other to vary the size of the image projected on the photosensitive paper.










Sub-classes under this class:

Class Number Class Name Patents
355/58 Including a cam or a screw with nonuniform pitch 56
355/57 Reflector between original and photo-sensitive paper 191


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8085386 Method for determining exposure condition and computer-readable storage media storing program for determining exposure condition Dec. 27, 2011
7659989 Focus determination for laser-mask imaging systems Feb. 9, 2010
7570431 Optical arrangement of autofocus elements for use with immersion lithography Aug. 4, 2009
7414794 Optical arrangement of autofocus elements for use with immersion lithography Aug. 19, 2008
6795165 Focus inspection device and focusing method Sep. 21, 2004
6545743 Producing an image of a portion of a photographic image onto a receiver using a digital image of the photographic image Apr. 8, 2003
6522391 Image reading apparatus Feb. 18, 2003
6333778 Image reading apparatus Dec. 25, 2001
6163369 Plane position detecting method and exposing method and exposure apparatus using same Dec. 19, 2000
6141134 Multiple-resolution optical device Oct. 31, 2000
5995201 Digital print method Nov. 30, 1999
5875022 Film image detection device and method Feb. 23, 1999
5841521 Method and apparatus for obtaining a lithographic plate Nov. 24, 1998
5703676 Zoom lens system for a photographic copier Dec. 30, 1997
5673101 Method of repetitively imaging a mask pattern on a substrate, and apparatus for performing the method Sep. 30, 1997
5670855 Motor control device Sep. 23, 1997
5659384 Position detection apparatus and method Aug. 19, 1997
5543833 Scanner focussing method and apparatus concurrently displaying multiple partial scans with different focus settings Aug. 6, 1996
5367406 Optical device with inherent focusing error correction Nov. 22, 1994
5274419 Camera and photosensitive material feed unit useful therefor Dec. 28, 1993
5204707 Multiple mode prints from tele/pan camera Apr. 20, 1993
5195148 Image reader having electrical and optical means for varying magnification Mar. 16, 1993
5168305 Optical system control mechanism Dec. 1, 1992
5157515 Image reading apparatus using a plurality of phase excitation modes Oct. 20, 1992
5138400 Image forming apparatus Aug. 11, 1992
5124744 Original scanning apparatus and image forming apparatus Jun. 23, 1992
5124738 Apparatus for correcting focal point according to lens temperature Jun. 23, 1992
5113218 Electrophotographic machine with control means responsive to set magnification ratio and focal length May. 12, 1992
5049923 Microfilm reader/printer Sep. 17, 1991
5048106 Image reader Sep. 10, 1991
5038168 Photographic printing apparatus Aug. 6, 1991
5028951 Copying apparatus Jul. 2, 1991
5023657 Micro-image handling apparatus with automatic focusing function Jun. 11, 1991
4998135 Mechanism for moving a projection lens assembly to alter projecting magnification Mar. 5, 1991
4996559 Optical system supporting mechanism for an image processing equipment Feb. 26, 1991
4972229 Copying magnification setting device for an electrophotographic copying apparatus Nov. 20, 1990
4959684 Copying machine Sep. 25, 1990
4956672 Copying magnification setting device for an electrophotographic copying apparatus Sep. 11, 1990
4954863 Image forming apparatus Sep. 4, 1990
4952971 Autofocusing apparatus for photographic printer Aug. 28, 1990
4922087 Image reader capable of calculating the real focal length of a projecting lens May. 1, 1990
4917460 Method and apparatus for controlling lens of image forming apparatus Apr. 17, 1990
4905042 Image forming apparatus Feb. 27, 1990
4901107 Lens repositioning device in a copier Feb. 13, 1990
4899194 Method of and device for detecting image Feb. 6, 1990
4881102 Copier with variable magnification ratio Nov. 14, 1989
4876568 Focusing method for printer Oct. 24, 1989
4857969 Copying machine having an intermediate tray Aug. 15, 1989
4847662 Image forming apparatus Jul. 11, 1989
4822137 Means for adjusting the focal length of a lens in relation to its displacement Apr. 18, 1989

1 2 3










 
 
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