JPS6466549A - Transmission of light through light transmitting sheet-like product - Google Patents

Transmission of light through light transmitting sheet-like product

Info

Publication number
JPS6466549A
JPS6466549A JP22303387A JP22303387A JPS6466549A JP S6466549 A JPS6466549 A JP S6466549A JP 22303387 A JP22303387 A JP 22303387A JP 22303387 A JP22303387 A JP 22303387A JP S6466549 A JPS6466549 A JP S6466549A
Authority
JP
Japan
Prior art keywords
light
angle
film
transmitting sheet
transmission
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
JP22303387A
Other languages
Japanese (ja)
Other versions
JPH0740000B2 (en
Inventor
Tomio Nakamura
Tokuji Takahashi
Kazumi Furuta
Tsuneo Sawazumi
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP22303387A priority Critical patent/JPH0740000B2/en
Publication of JPS6466549A publication Critical patent/JPS6466549A/en
Publication of JPH0740000B2 publication Critical patent/JPH0740000B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/8901—Optical details; Scanning details

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • 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)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To achieve a higher detection accuracy, by varying the direction of linear polarization according to the angle of inclination of a main refractive index to axis at an irradiation position of a light transmitting sheet-shaped product to low noise attributed to optical anisotrophy. CONSTITUTION:A laser light from a linearly polarized laser oscillator 2 is made to scan with a polygon mirror 4 via a Faraday elment 3 and passes through, for example, a polyethylene/terephthalate film 1 to be incident on a light receiver 6. The angle of rotation of linear polarization of the element 3 is controlled with a controller 5 to synthesize with a detector 7 arranged on a scan line. Then, an angle beta of incidence of the laser light into the film 1 is set to be roughly an angle of polarization so as to reduce interference to a minimum possible between a light transmitted once through the film 1 and a transmission light reflected on both sides, surface and back of the film 1 thereby reducing noise attributed to optical anisotrophy.
JP22303387A 1987-09-08 1987-09-08 Method of transmitting light to translucent sheet Expired - Lifetime JPH0740000B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22303387A JPH0740000B2 (en) 1987-09-08 1987-09-08 Method of transmitting light to translucent sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22303387A JPH0740000B2 (en) 1987-09-08 1987-09-08 Method of transmitting light to translucent sheet

Publications (2)

Publication Number Publication Date
JPS6466549A true JPS6466549A (en) 1989-03-13
JPH0740000B2 JPH0740000B2 (en) 1995-05-01

Family

ID=16791794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22303387A Expired - Lifetime JPH0740000B2 (en) 1987-09-08 1987-09-08 Method of transmitting light to translucent sheet

Country Status (1)

Country Link
JP (1) JPH0740000B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102866163A (en) * 2012-09-06 2013-01-09 中国科学院上海光学精密机械研究所 Apparatus and method for detecting laser injury

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102866163A (en) * 2012-09-06 2013-01-09 中国科学院上海光学精密机械研究所 Apparatus and method for detecting laser injury

Also Published As

Publication number Publication date
JPH0740000B2 (en) 1995-05-01

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