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Browse by Category: Main > Optical & Optics
Class Information
Number: 356/443
Name: Optics: measuring and testing > For light transmission or absorption > Of photographic film
Description: Subject matter wherein structure is provided to transmit light through a sheet, strip, or other translucent solid medium of a photographic nature, with provision to position the medium so that the light is transmitted either through all or selected portions of the medium, together with means to visually or photoelectrically determine the intensity of the transmitted light.










Sub-classes under this class:

Class Number Class Name Patents
356/444 With scanning, sweeping, or moving detector over film 101


Patents under this class:
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Patent Number Title Of Patent Date Issued
8462346 Representation of spatial-frequency data as a map Jun. 11, 2013
8325344 Optical density determination methods and apparatus Dec. 4, 2012
8055590 Method and system for remotely monitoring meters Nov. 8, 2011
7859674 System and method for measuring a harvest quality parameter on a harvesting device Dec. 28, 2010
7715660 Image acquisition device May. 11, 2010
7502116 Densitometers and methods for measuring optical density Mar. 10, 2009
7456971 Optical gas sensing apparatus Nov. 25, 2008
7430046 Pathogen and particle detector system and method Sep. 30, 2008
7151603 Overhead transparency clarity simulator Dec. 19, 2006
7035437 Image reading apparatus Apr. 25, 2006
6927859 Microdensitometer system with micrometer resolution for reading radiochromic films Aug. 9, 2005
6903824 Laser sensitometer Jun. 7, 2005
6897958 Apparatus and method for inspecting light transmittable material May. 24, 2005
6661518 Analysis machine for analyzing a cleanness condition of perforated transparent strips Dec. 9, 2003
6559939 Method of high throughput haze screening of material May. 6, 2003
6522385 Air shower head of photolithography equipment for directing air towards a wafer stage Feb. 18, 2003
6509575 Method and apparatus for polarization filtered x-ray film scanning recording Jan. 21, 2003
6476910 Light scattering apparatus and method for determining radiation exposure to plastic detectors Nov. 5, 2002
6236461 Laser sensitometer using multiple-prism beam expansion and a polarizer May. 22, 2001
6128090 Visual control strip for imageable media Oct. 3, 2000
6058202 Method of determining exposure condition of photograph May. 2, 2000
6035148 Shuttering system for a sensitometer Mar. 7, 2000
5875022 Film image detection device and method Feb. 23, 1999
5753930 Device for translating negative film image to a line scan May. 19, 1998
5686210 Identification of image-forming material type Nov. 11, 1997
5677762 Apparatus for illumination stabilization and homogenization Oct. 14, 1997
5673098 Feed device for motion picture film and device for detecting abnormalities in perforations Sep. 30, 1997
5664252 Apparatus for use in optimizing photographic film developer apparatus Sep. 2, 1997
5617213 Spot microdensitometer for spectral density analysis of film Apr. 1, 1997
5571643 Spectrophotometric quantitation of images in X-ray film and electrophoresis gel bands Nov. 5, 1996
5543883 Calibration of sensitometers Aug. 6, 1996
5506656 Method of and apparatus for measuring the optical density of a photographic negative Apr. 9, 1996
5436979 Process for detecting and mapping dirt on the surface of a photographic element Jul. 25, 1995
5427878 Semiconductor wafer processing with across-wafer critical dimension monitoring using optical endpoint detection Jun. 27, 1995
5369285 Method and apparatus for optical detection of cleaning medium in an information storage drive Nov. 29, 1994
5283636 Image reader and image reading method Feb. 1, 1994
5255069 Electro-optical interferometric microdensitometer system Oct. 19, 1993
5245418 Method for recording a color image on a medium and reading an image recorded on a medium Sep. 14, 1993
5216487 Transmissive system for characterizing materials containing photoreactive constituents Jun. 1, 1993
5142138 Image reader including plural light stopping plates with apertures Aug. 25, 1992
5117119 Auto-ranging film densitometer May. 26, 1992
5111037 Device for measuring light scattered by an information support May. 5, 1992
5066132 Method of and apparatus for inspecting paint coating Nov. 19, 1991
5065775 Tobacco processing Nov. 19, 1991
5044754 Apparatus and method for use in determining the optical transmission factor or density of a translucent element Sep. 3, 1991
5041995 Negative film inspection apparatus Aug. 20, 1991
5030838 Quality inspection device for printed matter and method thereof Jul. 9, 1991
5021978 Apparatus and method for controlling film density for an apparatus for exposing photographic film with image data Jun. 4, 1991
5021979 Calibration apparatus for a light source used for exposing photographic film with image data Jun. 4, 1991
4983044 Quantitative analysis of biological materials and photogrtaphic film and apparatus therefor Jan. 8, 1991

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