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Class Information
Number: 250/559.01
Name: Radiant energy > Photocells; circuits and apparatus > With circuit for evaluating a web, strand, strip, or sheet
Description: Subject matter wherein a photocell is responsive to light from a material having a cross-sectional dimension which is small compared to length, and through additional structure (i.e., a circuit) produces an electrical or mechanical output indicative of some characteristic of the material.

Sub-classes under this class:

Class Number Class Name Patents
250/559.12 Beam interruption or shadow 116
250/559.11 Detection of both reflected and transmitted light 71
250/559.16 Detection of diffuse light 120
250/559.04 Evaluation by regions, zones, or pixels 86
250/559.02 Evaluation of photographic film 104
250/559.19 Measuring dimensions 160
250/559.29 Measuring position 549
250/559.03 Sequential detector arrangement 24
250/559.1 With calibration 101
250/559.39 With comparison to reference or standard 196
250/559.07 With imaging 116
250/559.4 With indication of presence of material or feature 689
250/559.09 With polarization 59

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8704154 Non-contact probe with an optical filter and measuring machine including the same Apr. 22, 2014
8666202 System and method for measuring properties of a thin film coated glass Mar. 4, 2014
8654349 Method and device for determining the topography of a material surface Feb. 18, 2014
8598558 Sensor device for the spectrally resolved capture of valuable documents and a corresponding method Dec. 3, 2013
8575581 Image reading apparatus Nov. 5, 2013
8537350 Inspecting a workpiece using scattered light Sep. 17, 2013
8497976 Substrate measurement method and apparatus Jul. 30, 2013
8455851 Optical sensor and image forming apparatus Jun. 4, 2013
8448937 Medium supplying apparatus May. 28, 2013
8444821 Measuring of web May. 21, 2013
8428686 Extended optical range system for monitoring motion of a member Apr. 23, 2013
8422751 Method and apparatus for generating virtual teeth, and recording media storing program performing the method Apr. 16, 2013
8415648 Method of determination of glass surface shapes and optical distortion by reflected optical imaging Apr. 9, 2013
8399838 Terahertz investigative system and method Mar. 19, 2013
8345947 Paper-sheet recognition apparatus Jan. 1, 2013
8212205 Device and method for verifying valuable documents Jul. 3, 2012
8183548 System for detecting one or more predetermined optically derivable characteristics of a sample May. 22, 2012
8149409 Apparatus and method for on-line detecting welding part of strip Apr. 3, 2012
8145291 Extended optical range reflective system for monitoring motion of a member Mar. 27, 2012
8120000 Measuring apparatus having a movable measuring device in a press Feb. 21, 2012
8120001 Inspection method and apparatus, lithographic apparatus, lithographic processing cell and device manufacturing method Feb. 21, 2012
8108169 Method and apparatus for matching translucent coatings of absorbent substrates Jan. 31, 2012
8094298 Method for detecting particles and defects and inspection equipment thereof Jan. 10, 2012
8071967 Trolley wire wear measuring device using binary operated images Dec. 6, 2011
7969565 Device for inspecting a surface Jun. 28, 2011
7920751 Adaptive gradient weighting technique for detector bad cell correction Apr. 5, 2011
7868291 Investigation of vehicle glazing panels Jan. 11, 2011
7860278 Measuring color on a moving substrate Dec. 28, 2010
7839547 Optical fiber illumination device and inspection apparatus Nov. 23, 2010
7830549 Method for the identification of color measuring strips Nov. 9, 2010
7795604 Device for measuring wear of trolley wire by image processing Sep. 14, 2010
7741629 Apparatus for analysing surface properties with indirect illumination Jun. 22, 2010
7725152 Extended optical range system for monitoring motion of a member May. 25, 2010
7715897 Extended optical range reflective system for monitoring motion of a member May. 11, 2010
7684022 System and method for shade selection using a fabric brightness factor Mar. 23, 2010
7635853 Analyzing reflection data for recording medium identification Dec. 22, 2009
7627141 System and method for measuring color on a printing press Dec. 1, 2009
7619729 Method for detecting particles and defects and inspection equipment thereof Nov. 17, 2009
7582888 Reflection type optical sensor and method for detecting surface roughness Sep. 1, 2009
7435947 Apparatus and methods for integrating encoding functions in material placement machines Oct. 14, 2008
7427768 Apparatus, unit and method for testing image sensor packages Sep. 23, 2008
7425719 Method and apparatus for selectively providing data from a test head to a processor Sep. 16, 2008
7376251 Electronic image evaluating device and evalution method May. 20, 2008
7334520 Printing press and device for the inline monitoring of printing quality in sheet-fed offset printing presses Feb. 26, 2008
7317198 Method for determining the scale of an observation area Jan. 8, 2008
7301164 Measuring apparatus Nov. 27, 2007
7278704 Image forming apparatus Oct. 9, 2007
7167580 Image quality assurance systems and methodologies for improving the identification of and access speed to image quality suspects in documents Jan. 23, 2007
7155356 Quality and condition monitoring based on spectrum separating measurement Dec. 26, 2006
7101461 Method and apparatus for imaging a paper web Sep. 5, 2006

1 2 3 4

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