JPS55107929A - Detecting method of chromaticity of lumber surface - Google Patents

Detecting method of chromaticity of lumber surface

Info

Publication number
JPS55107929A
JPS55107929A JP1531679A JP1531679A JPS55107929A JP S55107929 A JPS55107929 A JP S55107929A JP 1531679 A JP1531679 A JP 1531679A JP 1531679 A JP1531679 A JP 1531679A JP S55107929 A JPS55107929 A JP S55107929A
Authority
JP
Japan
Prior art keywords
light
lumber
chromaticity
veneer
reflected
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.)
Pending
Application number
JP1531679A
Other languages
Japanese (ja)
Inventor
Motoo Igari
Shozo Nomura
Toshinori Inoue
Yutaka Abe
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP1531679A priority Critical patent/JPS55107929A/en
Publication of JPS55107929A publication Critical patent/JPS55107929A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G01N21/55—Specular reflectivity

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To eliminate an error due to surface reflected light and raise the reliability of examination of chromaticity of lumber surface, by placing polarizers for a light projector and a light receiver and inclining the polarization of the polarizers rectangularly to each other centering the proceeding directions of light. CONSTITUTION:Sliced veneer 6, whose chromaticity is to be examined, is moved in the direction of an arrow by a conveyor 7. Laser light is irradiated from a laser beam projector 8 upon the veneer through a polarizing filter 9 and a rotary mirror 10 to scan the surface of the veneer 6. The light reflected from the veneer is transmitted to a light receiver 11 through another polarizing filter 12. At that time, the polarization planes of the polarizing filters 9, 12 are inclined rectangularly to each other centering the proceeding directions of the light. As a result, the light regularly reflected on the surface of the lumber does not pass through the polarizing filters because the light is hardly polarized. Only scattered light polarized by the surface of the lumber passes through polarizing filter on the side of the light receiver. This results in providing a lumber surface chromaticity examination unit which is not affected by luster.
JP1531679A 1979-02-13 1979-02-13 Detecting method of chromaticity of lumber surface Pending JPS55107929A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1531679A JPS55107929A (en) 1979-02-13 1979-02-13 Detecting method of chromaticity of lumber surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1531679A JPS55107929A (en) 1979-02-13 1979-02-13 Detecting method of chromaticity of lumber surface

Publications (1)

Publication Number Publication Date
JPS55107929A true JPS55107929A (en) 1980-08-19

Family

ID=11885367

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1531679A Pending JPS55107929A (en) 1979-02-13 1979-02-13 Detecting method of chromaticity of lumber surface

Country Status (1)

Country Link
JP (1) JPS55107929A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62134038U (en) * 1986-02-17 1987-08-24
JPS6474676A (en) * 1987-09-16 1989-03-20 Matsushita Electric Ind Co Ltd Pattern recognizing device
JPH04232821A (en) * 1990-12-28 1992-08-21 Tetsuya Muraoka Automatic identification device for irregular color
JP2009141511A (en) * 2007-12-04 2009-06-25 Pfu Ltd Image reading unit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015127A (en) * 1975-10-30 1977-03-29 Aluminum Company Of America Monitoring film parameters using polarimetry of optical radiation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015127A (en) * 1975-10-30 1977-03-29 Aluminum Company Of America Monitoring film parameters using polarimetry of optical radiation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62134038U (en) * 1986-02-17 1987-08-24
JPS6474676A (en) * 1987-09-16 1989-03-20 Matsushita Electric Ind Co Ltd Pattern recognizing device
JPH04232821A (en) * 1990-12-28 1992-08-21 Tetsuya Muraoka Automatic identification device for irregular color
JP2009141511A (en) * 2007-12-04 2009-06-25 Pfu Ltd Image reading unit

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