JPS57105831A - Detector for optical position - Google Patents
Detector for optical positionInfo
- Publication number
- JPS57105831A JPS57105831A JP18068780A JP18068780A JPS57105831A JP S57105831 A JPS57105831 A JP S57105831A JP 18068780 A JP18068780 A JP 18068780A JP 18068780 A JP18068780 A JP 18068780A JP S57105831 A JPS57105831 A JP S57105831A
- Authority
- JP
- Japan
- Prior art keywords
- light
- prism
- prisms
- error signal
- deflected
- 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.)
- Granted
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Automatic Focus Adjustment (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE:To obtain a focus error signal and a tracking error signal, by providing prisms in parallel to a light axis and having different deflections, located at left and right around the light axis, and receiving the light flux passing through the prisms at a two-split photodetector. CONSTITUTION:A light reflected from an objective 12 is picked up with a beam splitter 3 toward prisms 41, 42, and deflected up and down with the prisms 41, 42. The light separated at the beam splitter 3 enters the prism 41, but since the prism 41 has no capability being deflected to the condensing direction of a cylindrical mirror 43, the light is condensed on a split line of an optical disc 44. Other arbitrary light passing through the prism 41 passes through the prism 41 again after reflection at the cylindrical mirror 43. A focus error signal can be detected with the Foucault system from differential signals of optical detectors 45, 47.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18068780A JPS57105831A (en) | 1980-12-19 | 1980-12-19 | Detector for optical position |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18068780A JPS57105831A (en) | 1980-12-19 | 1980-12-19 | Detector for optical position |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33083787A Division JPS63171435A (en) | 1987-12-25 | 1987-12-25 | Optical position detector |
JP33083687A Division JPS63171434A (en) | 1987-12-25 | 1987-12-25 | Optical position detector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57105831A true JPS57105831A (en) | 1982-07-01 |
JPS6336045B2 JPS6336045B2 (en) | 1988-07-19 |
Family
ID=16087544
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18068780A Granted JPS57105831A (en) | 1980-12-19 | 1980-12-19 | Detector for optical position |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57105831A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6074126A (en) * | 1983-09-29 | 1985-04-26 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
JPS60169706A (en) * | 1984-02-14 | 1985-09-03 | Olympus Optical Co Ltd | Surface-state measuring device |
JPS6159201A (en) * | 1984-08-30 | 1986-03-26 | Sony Corp | Optical displacement detector |
JPS62172208A (en) * | 1986-01-27 | 1987-07-29 | Osaka Seimitsu Kikai Kk | Method for optically measuring shape |
JPS62238403A (en) * | 1986-04-09 | 1987-10-19 | Mitsubishi Electric Corp | Apparatus for measuring surface shape |
JPS63250552A (en) * | 1987-04-08 | 1988-10-18 | Yasunaga Tekkosho:Kk | Optical flaw displacement measuring instrument |
US5161139A (en) * | 1989-01-06 | 1992-11-03 | Kabushiki Kaisha Toshiba | Focusing error detecting apparatus |
-
1980
- 1980-12-19 JP JP18068780A patent/JPS57105831A/en active Granted
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6074126A (en) * | 1983-09-29 | 1985-04-26 | Matsushita Electric Ind Co Ltd | Optical recording and reproducing device |
JPH0447894B2 (en) * | 1983-09-29 | 1992-08-05 | Matsushita Electric Ind Co Ltd | |
JPS60169706A (en) * | 1984-02-14 | 1985-09-03 | Olympus Optical Co Ltd | Surface-state measuring device |
JPH056643B2 (en) * | 1984-02-14 | 1993-01-27 | Olympus Optical Co | |
JPS6159201A (en) * | 1984-08-30 | 1986-03-26 | Sony Corp | Optical displacement detector |
JPH0690008B2 (en) * | 1984-08-30 | 1994-11-14 | ソニー株式会社 | Tracking error detector |
JPS62172208A (en) * | 1986-01-27 | 1987-07-29 | Osaka Seimitsu Kikai Kk | Method for optically measuring shape |
JPS62238403A (en) * | 1986-04-09 | 1987-10-19 | Mitsubishi Electric Corp | Apparatus for measuring surface shape |
JPS63250552A (en) * | 1987-04-08 | 1988-10-18 | Yasunaga Tekkosho:Kk | Optical flaw displacement measuring instrument |
US5161139A (en) * | 1989-01-06 | 1992-11-03 | Kabushiki Kaisha Toshiba | Focusing error detecting apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS6336045B2 (en) | 1988-07-19 |
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