JPS55124002A - Optical position detector - Google Patents
Optical position detectorInfo
- Publication number
- JPS55124002A JPS55124002A JP3056579A JP3056579A JPS55124002A JP S55124002 A JPS55124002 A JP S55124002A JP 3056579 A JP3056579 A JP 3056579A JP 3056579 A JP3056579 A JP 3056579A JP S55124002 A JPS55124002 A JP S55124002A
- Authority
- JP
- Japan
- Prior art keywords
- photodetector
- accomplished
- electric signal
- reflecting mirror
- luminous flux
- 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
Abstract
PURPOSE: To obtain the optical position detector of high accuracy and high resolution by providing a reference position projection system within the optical system and compensating the measurement errors owing to the aging of photodetectors and external factors.
CONSTITUTION: The luminous flux from a light source part 10 is reflected only in the direction of a projecting lens 30 by a reflecting mirror 20 and the reflected light projected to the subject 60 generates an electric signal by a photodetector Lb on the photodetector 40 surface. Here, part of the transmitted luminous flux of the lens 30 is caused to generate a reference electric signal by a photodetector Ls by a reference reflecting mirror 50. These signals are processed in an electronic counter device 70, whereby digital displaying is accomplished. Hitherto, Lb was made a reference value, i.e., zero point, but when the photodetector Lb displaces, it directly becomes a measurement error. If this (Lb-Ls) is made a reference value, the differences of addresses may be made constant irrespective of the displacement of the photodetector. Thereby, highly accurate position detection may be accomplished.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3056579A JPS55124002A (en) | 1979-03-17 | 1979-03-17 | Optical position detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3056579A JPS55124002A (en) | 1979-03-17 | 1979-03-17 | Optical position detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55124002A true JPS55124002A (en) | 1980-09-24 |
Family
ID=12307338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3056579A Pending JPS55124002A (en) | 1979-03-17 | 1979-03-17 | Optical position detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55124002A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58113706A (en) * | 1981-12-26 | 1983-07-06 | Nippon Kogaku Kk <Nikon> | Detector for horizontal position |
JPS58146804A (en) * | 1982-02-25 | 1983-09-01 | Nippon Kogaku Kk <Nikon> | Automatic collimator of photoelectric type |
JPS59174221A (en) * | 1983-03-25 | 1984-10-02 | Komatsu Ltd | Bending angle detecting device of bending machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51145353A (en) * | 1975-06-09 | 1976-12-14 | Masayoshi Yoshimura | Angle measuring device |
-
1979
- 1979-03-17 JP JP3056579A patent/JPS55124002A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51145353A (en) * | 1975-06-09 | 1976-12-14 | Masayoshi Yoshimura | Angle measuring device |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58113706A (en) * | 1981-12-26 | 1983-07-06 | Nippon Kogaku Kk <Nikon> | Detector for horizontal position |
JPH0442601B2 (en) * | 1981-12-26 | 1992-07-14 | Nippon Kogaku Kk | |
JPS58146804A (en) * | 1982-02-25 | 1983-09-01 | Nippon Kogaku Kk <Nikon> | Automatic collimator of photoelectric type |
JPS59174221A (en) * | 1983-03-25 | 1984-10-02 | Komatsu Ltd | Bending angle detecting device of bending machine |
JPH0557046B2 (en) * | 1983-03-25 | 1993-08-23 | Komatsu Mfg Co Ltd |
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