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Class Information
Number: 250/559.11
Name: Radiant energy > Photocells; circuits and apparatus > With circuit for evaluating a web, strand, strip, or sheet > Detection of both reflected and transmitted light
Description: Subject matter wherein photocells are arranged to receive light which has been reflected by the material and light which has been transmitted through the mate­rial.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8666202 System and method for measuring properties of a thin film coated glass Mar. 4, 2014
8610048 Photosensitive integrated circuit equipped with a reflective layer and corresponding method of production Dec. 17, 2013
8575581 Image reading apparatus Nov. 5, 2013
8522949 Paper sheet processing apparatus Sep. 3, 2013
8471705 Method and apparatus for detecting presence of a target object via continuous laser and range of the target object via laser pulse Jun. 25, 2013
8345246 Running yarn line inspection method and carbon fiber manufacturing method using thereof Jan. 1, 2013
8068641 Interaction interface for controlling an application Nov. 29, 2011
7968860 System and method for measurement of degree of moisture stratification in a paper or board Jun. 28, 2011
7961327 Optical pH sensor Jun. 14, 2011
7936914 Authenticity determination method, apparatus, and program May. 3, 2011
7684022 System and method for shade selection using a fabric brightness factor Mar. 23, 2010
7677379 Optical sensing device for detecting optical features of valuable papers Mar. 16, 2010
7677380 Optical sensing device for detecting optical features of valuable papers Mar. 16, 2010
7667598 Method and apparatus for detecting presence and range of a target object using a common detector Feb. 23, 2010
7589339 Paper sheets metal thread part or magnetic element pattern detector or paper sheets metal thread part or magnetic element pattern detection method Sep. 15, 2009
7519213 Optical double feed detection Apr. 14, 2009
7491959 Defect inspection apparatus Feb. 17, 2009
7465935 Method for inspecting pattern defect and device for realizing the same Dec. 16, 2008
7401778 Multi-sheet feed detection system Jul. 22, 2008
7385176 Calibration reflector device, sensor arrangement, and method for sterile packaging of a fiber-optic sensor arrangement Jun. 10, 2008
7282729 Fabry-Perot resonator apparatus and method for observing low reflectivity surfaces Oct. 16, 2007
7235805 Paper sheets theft prevention ink detector and paper sheets theft prevention ink detection method Jun. 26, 2007
7199386 System and method for detecting defects in a light-management film Apr. 3, 2007
7145161 Detecting location of edge of media sheet Dec. 5, 2006
7075086 Measurement of metal polish quality Jul. 11, 2006
7030400 Real-time web inspection method and apparatus using combined reflected and transmitted light images Apr. 18, 2006
6994432 Early transparency detection routine for inkjet printing Feb. 7, 2006
6960777 Image-forming device sensing mechanism Nov. 1, 2005
6924892 Apparatus and a method of inspecting pieces of cloth Aug. 2, 2005
6885466 Method for measuring thickness of oxide film Apr. 26, 2005
6859274 Light spectrum detecting apparatus Feb. 22, 2005
6819409 System for reading an information strip containing optically coded information Nov. 16, 2004
6778307 Method and system for performing swept-wavelength measurements within an optical system Aug. 17, 2004
6743337 Process and apparatus for determining the properties of a traveling material web Jun. 1, 2004
6731393 System and related methods for automatically determining media type in a printing device media tray May. 4, 2004
6685313 Early transparency detection routine for inkjet printing Feb. 3, 2004
6653649 Optical measurement and inspection method and apparatus having enhanced optical path difference detection Nov. 25, 2003
6605819 Media validation Aug. 12, 2003
6600167 Medium discerning apparatus with optical sensor Jul. 29, 2003
6561643 Advanced media determination system for inkjet printing May. 13, 2003
6521905 Method and device for detecting the position of a transparent moving conveyor belt Feb. 18, 2003
6455865 Test piece analyzing apparatus Sep. 24, 2002
6437358 Apparatus and methods for capturing defect data Aug. 20, 2002
6433350 Multi-range fiber-optic reflective displacement micrometer Aug. 13, 2002
6334752 Hand mechanism and library apparatus Jan. 1, 2002
6192141 Apparatus and method for automatically recognizing print media Feb. 20, 2001
6040584 Method and for system for detecting damaged bills Mar. 21, 2000
5955741 Methods of measuring currency limpness Sep. 21, 1999
5938334 Methods of measuring currency limpness Aug. 17, 1999
5915279 Multispectral optical detection device and method Jun. 22, 1999

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