CA2504545A1 - Full width array scanning spectrophotometer - Google Patents

Full width array scanning spectrophotometer Download PDF

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Publication number
CA2504545A1
CA2504545A1 CA002504545A CA2504545A CA2504545A1 CA 2504545 A1 CA2504545 A1 CA 2504545A1 CA 002504545 A CA002504545 A CA 002504545A CA 2504545 A CA2504545 A CA 2504545A CA 2504545 A1 CA2504545 A1 CA 2504545A1
Authority
CA
Canada
Prior art keywords
color
full width
closely spaced
paper path
transverse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002504545A
Other languages
French (fr)
Other versions
CA2504545C (en
Inventor
Lalit K. Mestha
Jagdish C. Tandon
Steven B. Bolte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of CA2504545A1 publication Critical patent/CA2504545A1/en
Application granted granted Critical
Publication of CA2504545C publication Critical patent/CA2504545C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/501—Colorimeters using spectrally-selective light sources, e.g. LEDs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/062—LED's
    • G01N2201/0627—Use of several LED's for spectral resolution

Abstract

A full width array spectrophotometer for full width scanning color analysis of color test targets, with one or two substantially linear elongated arrays of closely spaced multiple LED illumination sources of plural different color emissions in a multiply repeated pattern of at least three or four different colors transversely spanning a printer paper path and sequentially illuminated to illuminate a transverse band across a printed sheet moving in the paper path, and a corresponding elongated low cost light imaging bar comprising a parallel and correspondingly elongated array of multiple closely spaced different color sensitive (three or four rows of color-filtered) photodetectors, which imaging bar is positioned to detect and analyze light reflected from the transverse sequentially illuminated band.
CA002504545A 2004-04-27 2005-04-20 Full width array scanning spectrophotometer Expired - Fee Related CA2504545C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/833,231 US6975949B2 (en) 2004-04-27 2004-04-27 Full width array scanning spectrophotometer
US10/833,231 2004-04-27

Publications (2)

Publication Number Publication Date
CA2504545A1 true CA2504545A1 (en) 2005-10-27
CA2504545C CA2504545C (en) 2009-10-06

Family

ID=34939516

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002504545A Expired - Fee Related CA2504545C (en) 2004-04-27 2005-04-20 Full width array scanning spectrophotometer

Country Status (5)

Country Link
US (1) US6975949B2 (en)
EP (1) EP1591761A3 (en)
JP (1) JP2005315883A (en)
CN (1) CN100554898C (en)
CA (1) CA2504545C (en)

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Also Published As

Publication number Publication date
CN100554898C (en) 2009-10-28
EP1591761A3 (en) 2009-09-30
EP1591761A2 (en) 2005-11-02
CN1699937A (en) 2005-11-23
US20050240366A1 (en) 2005-10-27
CA2504545C (en) 2009-10-06
JP2005315883A (en) 2005-11-10
US6975949B2 (en) 2005-12-13

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