JPS5651049A - Optical position detector - Google Patents
Optical position detectorInfo
- 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
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
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)
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 |
-
1979
- 1979-10-01 JP JP12654179A patent/JPS5651049A/en active Pending
Cited By (3)
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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