JPS6114506A - Optical sensor - Google Patents

Optical sensor

Info

Publication number
JPS6114506A
JPS6114506A JP13562284A JP13562284A JPS6114506A JP S6114506 A JPS6114506 A JP S6114506A JP 13562284 A JP13562284 A JP 13562284A JP 13562284 A JP13562284 A JP 13562284A JP S6114506 A JPS6114506 A JP S6114506A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
means
output
work
light
corresponding
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
JP13562284A
Other versions
JPH0423724B2 (en )
Inventor
Keiichi Kobayashi
Masao Murata
Seiichiro Tamai
Original Assignee
Matsushita Electric Ind 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

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00Measuring arrangements characterised by the use of optical means

Abstract

PURPOSE:To perform optical sensing in the presence of noises due to external light by projecting laser light which has different modulation frequencies upon a work, calculating outputs corresponding to modulation frequencies from reflected light, and calculating their difference. CONSTITUTION:A modulation frequency setting means 14 which sets sections of mutually different modulation frequencies periodically, a means which modulates and projects laser light on the work 5 through said means 15, and the photodetecting means consisting of an interference filter 16, semiconductor position sensor 7, etc., which photodetect reflected light from the work 5 are provided. Further, current-voltage converting circuit 8 and 9 which convert the output of the photodetecting means into an electric signal, filters 17 and 18 which are connected to the circuits 8 and 9 to pass a signal of modulation frequency f1, output sample means 19 and 20 which receive outputs of the filters 18 and 19 and detect an output A corresponding to a section of frequency f1 and an output B corresponding to a section of frequency f2, and an arithmetic means 23 which calculates the difference between the outputs A and B are provided. Then, a filter 16 cuts off the majority of arc light to prevent the sensor 7 and electric signal converting circuits 8 and 9 connected thereto from being saturated.
JP13562284A 1984-06-29 1984-06-29 Expired - Lifetime JPH0423724B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13562284A JPH0423724B2 (en) 1984-06-29 1984-06-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13562284A JPH0423724B2 (en) 1984-06-29 1984-06-29

Publications (2)

Publication Number Publication Date
JPS6114506A true true JPS6114506A (en) 1986-01-22
JPH0423724B2 JPH0423724B2 (en) 1992-04-23

Family

ID=15156108

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13562284A Expired - Lifetime JPH0423724B2 (en) 1984-06-29 1984-06-29

Country Status (1)

Country Link
JP (1) JPH0423724B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63302314A (en) * 1987-03-26 1988-12-09 Matsushita Electric Works Ltd Photoelectric sensor
JPS6415907U (en) * 1987-07-13 1989-01-26
JPS6448777A (en) * 1987-08-20 1989-02-23 Fuji Xerox Co Ltd After treatment device for copying machine
JPH022902A (en) * 1988-06-14 1990-01-08 Ntt Technol Transfer Corp Posture control sensor
JP2008122318A (en) * 2006-11-15 2008-05-29 Yamatake Corp Range finder/speedometer, and distance/speed measurement method
JP2008139059A (en) * 2006-11-30 2008-06-19 Yamatake Corp Distance meter and a distance measuring method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63302314A (en) * 1987-03-26 1988-12-09 Matsushita Electric Works Ltd Photoelectric sensor
JPS6415907U (en) * 1987-07-13 1989-01-26
JPS6448777A (en) * 1987-08-20 1989-02-23 Fuji Xerox Co Ltd After treatment device for copying machine
JPH022902A (en) * 1988-06-14 1990-01-08 Ntt Technol Transfer Corp Posture control sensor
JP2008122318A (en) * 2006-11-15 2008-05-29 Yamatake Corp Range finder/speedometer, and distance/speed measurement method
JP2008139059A (en) * 2006-11-30 2008-06-19 Yamatake Corp Distance meter and a distance measuring method

Also Published As

Publication number Publication date Type
JPH0423724B2 (en) 1992-04-23 grant

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