JPS5745405A - Light spot position detector - Google Patents

Light spot position detector

Info

Publication number
JPS5745405A
JPS5745405A JP12114580A JP12114580A JPS5745405A JP S5745405 A JPS5745405 A JP S5745405A JP 12114580 A JP12114580 A JP 12114580A JP 12114580 A JP12114580 A JP 12114580A JP S5745405 A JPS5745405 A JP S5745405A
Authority
JP
Japan
Prior art keywords
light spot
laser beam
elements
outputs
spot position
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
JP12114580A
Other languages
Japanese (ja)
Inventor
Akira Hirai
Tsukasa Ikegami
Tsugio Iwama
Shigekiyo Sagi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12114580A priority Critical patent/JPS5745405A/en
Publication of JPS5745405A publication Critical patent/JPS5745405A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To give no limitations to the size of a detection range and to reduce the influence of background light by receiving laser beam by the plural photodiode elements which are arranged in a grid shape, and comparing and operating the outputs thereof. CONSTITUTION:Laser beam is received with the plural photodiode elements which are disposed on a one plane in close contact in a grid shape, and the outputs among the adjacent four elements to which the laser beam is made incident are operated, whereby the light spot position in the four elements is determined. Then, the intersecting point positions of the above four pieces are added to the value thereof, whereby, the light spot position is determined. For example, laser beam is cast on a light spot detecting element 12 disposed with plural photodiode element 13 in a grid shape and the outputs of the respective elements 13 are successively processed with a multiplexer 14, a voltage converter 15, and an A/D converter 16 to detect the four diodes to which the laser beam is made incident. The outputs thereof are processed and operated, whereby the light spot position is detected.
JP12114580A 1980-09-03 1980-09-03 Light spot position detector Pending JPS5745405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12114580A JPS5745405A (en) 1980-09-03 1980-09-03 Light spot position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12114580A JPS5745405A (en) 1980-09-03 1980-09-03 Light spot position detector

Publications (1)

Publication Number Publication Date
JPS5745405A true JPS5745405A (en) 1982-03-15

Family

ID=14803965

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12114580A Pending JPS5745405A (en) 1980-09-03 1980-09-03 Light spot position detector

Country Status (1)

Country Link
JP (1) JPS5745405A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082908A (en) * 1983-10-14 1985-05-11 Nippon Kogaku Kk <Nikon> Photoelectric auto collimator
JPS61225101A (en) * 1985-03-28 1986-10-06 Agency Of Ind Science & Technol Volatile mildew-proofing agent
KR100781649B1 (en) 2006-04-28 2007-12-05 주식회사 셀텍 Diagnosis reagent analysis system using photosensor array
CN102353521A (en) * 2011-06-13 2012-02-15 北京康拓红外技术股份有限公司 Method for measuring spot size of multi-element infrared ray shaft temperature detector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082908A (en) * 1983-10-14 1985-05-11 Nippon Kogaku Kk <Nikon> Photoelectric auto collimator
JPS61225101A (en) * 1985-03-28 1986-10-06 Agency Of Ind Science & Technol Volatile mildew-proofing agent
JPH0116804B2 (en) * 1985-03-28 1989-03-27 Kogyo Gijutsuin
KR100781649B1 (en) 2006-04-28 2007-12-05 주식회사 셀텍 Diagnosis reagent analysis system using photosensor array
CN102353521A (en) * 2011-06-13 2012-02-15 北京康拓红外技术股份有限公司 Method for measuring spot size of multi-element infrared ray shaft temperature detector

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