JPS5651049A - Optical position detector - Google Patents

Optical position detector

Info

Publication number
JPS5651049A
JPS5651049A JP12654179A JP12654179A JPS5651049A JP S5651049 A JPS5651049 A JP S5651049A JP 12654179 A JP12654179 A JP 12654179A JP 12654179 A JP12654179 A JP 12654179A JP S5651049 A JPS5651049 A JP S5651049A
Authority
JP
Japan
Prior art keywords
photodetector
emitting element
light emitting
output signal
circuit
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
JP12654179A
Other languages
Japanese (ja)
Inventor
Minoru Yoshioka
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP12654179A priority Critical patent/JPS5651049A/en
Publication of JPS5651049A publication Critical patent/JPS5651049A/en
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE: To perform stable detection, by driving a light emitting element so that it flickers with a prescribed frequency and inputting the output signal of a photodetector to a differentiating circuit.
CONSTITUTION: The detector is provided with a signal pickup means mounted on a support member which moves on a record disc, and a light emitting element 1 and a photodetector 3 so that they move according to the movement of the means. The photodetector 3 detects the reflection light from the record disc. Further, the detector consists of an oscillating circuit 4 feeding the driving current to the light emitting element 1, band pass filter circuit 6 having the center frequency equal to the oscillating frequency with the output signal of the photodetector 3, and a comparator 8 comparing the output signal of the filter circuit 6 with a prescribed reference voltage.
COPYRIGHT: (C)1981,JPO&Japio
JP12654179A 1979-10-01 1979-10-01 Optical position detector Pending JPS5651049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12654179A JPS5651049A (en) 1979-10-01 1979-10-01 Optical position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12654179A JPS5651049A (en) 1979-10-01 1979-10-01 Optical position detector

Publications (1)

Publication Number Publication Date
JPS5651049A true JPS5651049A (en) 1981-05-08

Family

ID=14937732

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12654179A Pending JPS5651049A (en) 1979-10-01 1979-10-01 Optical position detector

Country Status (1)

Country Link
JP (1) JPS5651049A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837870A (en) * 1981-08-28 1983-03-05 Hitachi Ltd Full automatic player
JPS60127905A (en) * 1983-12-09 1985-07-08 Ngk Spark Plug Co Ltd High touchness ceramic tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5837870A (en) * 1981-08-28 1983-03-05 Hitachi Ltd Full automatic player
JPS60127905A (en) * 1983-12-09 1985-07-08 Ngk Spark Plug Co Ltd High touchness ceramic tool
JPH0260442B2 (en) * 1983-12-09 1990-12-17 Ngk Spark Plug Co

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