JPS57160006A - Optical measuring method and auxiliary device therefor - Google Patents

Optical measuring method and auxiliary device therefor

Info

Publication number
JPS57160006A
JPS57160006A JP4490781A JP4490781A JPS57160006A JP S57160006 A JPS57160006 A JP S57160006A JP 4490781 A JP4490781 A JP 4490781A JP 4490781 A JP4490781 A JP 4490781A JP S57160006 A JPS57160006 A JP S57160006A
Authority
JP
Japan
Prior art keywords
measured
scanning
beams
pair
collimator lens
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
JP4490781A
Other languages
Japanese (ja)
Inventor
Hideo Sakata
Taiji Takayama
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.)
Mitsutoyo Manufacturing Co Ltd
Original Assignee
Mitsutoyo Manufacturing 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 Mitsutoyo Manufacturing Co Ltd filed Critical Mitsutoyo Manufacturing Co Ltd
Priority to JP4490781A priority Critical patent/JPS57160006A/en
Publication of JPS57160006A publication Critical patent/JPS57160006A/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
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters

Landscapes

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

Abstract

PURPOSE:To measure the size of a large object to be measured without enalarging a collimator lens and without degrading measuring efficiency and accuracy in a constitutiong wherein the object to be measured is scanned by two divided parallel beams. CONSTITUTION:The parallel scanning beam B which has passed a collimator lens 4 is divided into two beams by a two division mirror 17 and reflected by a pair of deflecting mirrors 18. A pair of the parallel beams obtained in this way scan the outer edge of the object to be measured 6. After the scanning, the scanning beams are reflected into the same directions by a pair of deflecting mirrors 19 and a combining mirror 20. The value of an outer diameter D=L+l, where L is a width which is not scanned by the scanning beams and l is a width of a dark part after scanning, is displayed through a measuring circuit. Since two divided parallel beams are used, the size of the large object to be measured 6 can be measured without enlarging the collimator lens 4 and also without degarding resolution, measuring efficiency, and accuracy.
JP4490781A 1981-03-27 1981-03-27 Optical measuring method and auxiliary device therefor Pending JPS57160006A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4490781A JPS57160006A (en) 1981-03-27 1981-03-27 Optical measuring method and auxiliary device therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4490781A JPS57160006A (en) 1981-03-27 1981-03-27 Optical measuring method and auxiliary device therefor

Publications (1)

Publication Number Publication Date
JPS57160006A true JPS57160006A (en) 1982-10-02

Family

ID=12704531

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4490781A Pending JPS57160006A (en) 1981-03-27 1981-03-27 Optical measuring method and auxiliary device therefor

Country Status (1)

Country Link
JP (1) JPS57160006A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606808A (en) * 1983-06-24 1985-01-14 Mitsutoyo Mfg Co Ltd Optical measuring device
US4911307A (en) * 1983-09-30 1990-03-27 Accupack Systems Photoelectric apparatus for sorting articles according to size

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606808A (en) * 1983-06-24 1985-01-14 Mitsutoyo Mfg Co Ltd Optical measuring device
US4911307A (en) * 1983-09-30 1990-03-27 Accupack Systems Photoelectric apparatus for sorting articles according to size

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