JPS55107941A - Inspecting method of sheet - Google Patents

Inspecting method of sheet

Info

Publication number
JPS55107941A
JPS55107941A JP1531479A JP1531479A JPS55107941A JP S55107941 A JPS55107941 A JP S55107941A JP 1531479 A JP1531479 A JP 1531479A JP 1531479 A JP1531479 A JP 1531479A JP S55107941 A JPS55107941 A JP S55107941A
Authority
JP
Japan
Prior art keywords
sheet
scanning beams
light
irradiated
proceed
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
JP1531479A
Other languages
Japanese (ja)
Other versions
JPS6239380B2 (en
Inventor
Yutaka Abe
Shozo Nomura
Toshinori Inoue
Motoo Igari
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 JP1531479A priority Critical patent/JPS55107941A/en
Publication of JPS55107941A publication Critical patent/JPS55107941A/en
Publication of JPS6239380B2 publication Critical patent/JPS6239380B2/ja
Granted 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)

Abstract

PURPOSE:To raise the accuracy of detection, by generating scanning beams which proceed in parallel with one another on a horizontal plane and by irradiating the scanning beams upon the surface of a sheet and providing a light receiver to detect the change the quantity of reflected or transmitted light. CONSTITUTION:A light beam is irradiated from a gas laser 4 upon a rotary mirror 3 provided on the focus of a parabolic reflector 7, thereby generating scanning beams L which proceed in parallel with one another on a horizontal plane. The scanning beams L are irradiated upon the surface of a sheet 2 by a slender oblique reflector 8 which is moved near the surface of a sheet 2. The change in the quantity of reflected or transmitted light is detected by a light receiver 5. The oblique reflector 8 is Attached to a movable frame 9 which slides in a direction (b) perpendicular to the conveyance direction (a) of the sheet 2. As a result, the angle of incidence to the surface of the inspected sheet is kept constant. Therefore, the level of received light from the end of the sheet does not fall and a flaw or the like can be detected with high accuracy.
JP1531479A 1979-02-13 1979-02-13 Inspecting method of sheet Granted JPS55107941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1531479A JPS55107941A (en) 1979-02-13 1979-02-13 Inspecting method of sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1531479A JPS55107941A (en) 1979-02-13 1979-02-13 Inspecting method of sheet

Publications (2)

Publication Number Publication Date
JPS55107941A true JPS55107941A (en) 1980-08-19
JPS6239380B2 JPS6239380B2 (en) 1987-08-22

Family

ID=11885314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1531479A Granted JPS55107941A (en) 1979-02-13 1979-02-13 Inspecting method of sheet

Country Status (1)

Country Link
JP (1) JPS55107941A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50151189A (en) * 1974-05-24 1975-12-04

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50151189A (en) * 1974-05-24 1975-12-04

Also Published As

Publication number Publication date
JPS6239380B2 (en) 1987-08-22

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