JPS5560842A - Failure checking unit - Google Patents

Failure checking unit

Info

Publication number
JPS5560842A
JPS5560842A JP13425078A JP13425078A JPS5560842A JP S5560842 A JPS5560842 A JP S5560842A JP 13425078 A JP13425078 A JP 13425078A JP 13425078 A JP13425078 A JP 13425078A JP S5560842 A JPS5560842 A JP S5560842A
Authority
JP
Japan
Prior art keywords
light
polarized light
passes
optical
filter
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
JP13425078A
Other languages
Japanese (ja)
Inventor
Yoshihisa Morioka
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13425078A priority Critical patent/JPS5560842A/en
Publication of JPS5560842A publication Critical patent/JPS5560842A/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
    • G01N21/21—Polarisation-affecting properties

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)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE:To perform an automatic accurate surface defect inspection by employing linearly polarized light and polarized light filter. CONSTITUTION:An optical system having light source 12 emitting linearly polarized light such as a He-Ne gas laser oscillator is combined with detecting system having a polarized light filter 19 which blocks the passing of particular components of light reflected from the surface of an object to be checked such as weld rod, and an optical-elctrical converter 18. Linearly polaized light from the light source 12 passes through the revolving polyface mirror 13, the reflecting mirrors 15, 16 and impinges on the surface of the object to be tested, its reflected light passes through the condenser lense 17, the polarized light filter 19, so that the optical-electrical converter 18 receives only light components other than projected polarized light. The light is then converted to an electric signal and passes through the differentiator 20, the discriminator 21, the logic gate 22 to be outputted as a failure signal.
JP13425078A 1978-10-31 1978-10-31 Failure checking unit Pending JPS5560842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13425078A JPS5560842A (en) 1978-10-31 1978-10-31 Failure checking unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13425078A JPS5560842A (en) 1978-10-31 1978-10-31 Failure checking unit

Publications (1)

Publication Number Publication Date
JPS5560842A true JPS5560842A (en) 1980-05-08

Family

ID=15123896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13425078A Pending JPS5560842A (en) 1978-10-31 1978-10-31 Failure checking unit

Country Status (1)

Country Link
JP (1) JPS5560842A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6323627U (en) * 1986-07-29 1988-02-16
JPH05296942A (en) * 1992-04-15 1993-11-12 Sumitomo Electric Ind Ltd Device for detecting bubble within linear body resin covering
JP2009002790A (en) * 2007-06-21 2009-01-08 Sumitomo Electric Ind Ltd Abnormality detector of color tracer and abnormality detection method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6323627U (en) * 1986-07-29 1988-02-16
JPH05296942A (en) * 1992-04-15 1993-11-12 Sumitomo Electric Ind Ltd Device for detecting bubble within linear body resin covering
JP2009002790A (en) * 2007-06-21 2009-01-08 Sumitomo Electric Ind Ltd Abnormality detector of color tracer and abnormality detection method
JP4640381B2 (en) * 2007-06-21 2011-03-02 住友電気工業株式会社 Colored tracer abnormality detection device and abnormality detection method

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