JPS57105832A - Detector for optical position - Google Patents

Detector for optical position

Info

Publication number
JPS57105832A
JPS57105832A JP18068880A JP18068880A JPS57105832A JP S57105832 A JPS57105832 A JP S57105832A JP 18068880 A JP18068880 A JP 18068880A JP 18068880 A JP18068880 A JP 18068880A JP S57105832 A JPS57105832 A JP S57105832A
Authority
JP
Japan
Prior art keywords
photodetector
error signal
adjustment
light
sum
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
Application number
JP18068880A
Other languages
Japanese (ja)
Other versions
JPS6331858B2 (en
Inventor
Tsuneo Hirose
Shinichi Tanaka
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP18068880A priority Critical patent/JPS57105832A/en
Publication of JPS57105832A publication Critical patent/JPS57105832A/en
Publication of JPS6331858B2 publication Critical patent/JPS6331858B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a focus error signal and a tracking error signal without light amount loss, by reflecting light toward different directions in parallel after a beam splitter, focusing it with a lens, and receiving light at a 4-split photodetector. CONSTITUTION:A light from prisms 21, 22 is condensed on an optical detector 24 with a photodetector condensing lens 23. A tracking error signal can be obtained by taking the difference between the sum of detectors 25, 26 and the sum of 27, 28. The adjustment of the photodetector for the optimum location can be made with focus adjustment at a direction vertical to the 2-split plane after passing through the beam splitter 3 and with tracking adjustment toward a direction in parallel.
JP18068880A 1980-12-19 1980-12-19 Detector for optical position Granted JPS57105832A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18068880A JPS57105832A (en) 1980-12-19 1980-12-19 Detector for optical position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18068880A JPS57105832A (en) 1980-12-19 1980-12-19 Detector for optical position

Publications (2)

Publication Number Publication Date
JPS57105832A true JPS57105832A (en) 1982-07-01
JPS6331858B2 JPS6331858B2 (en) 1988-06-27

Family

ID=16087562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18068880A Granted JPS57105832A (en) 1980-12-19 1980-12-19 Detector for optical position

Country Status (1)

Country Link
JP (1) JPS57105832A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982336U (en) * 1982-11-24 1984-06-04 株式会社東芝 Optical disk inspection equipment
JPS6020025U (en) * 1983-07-15 1985-02-12 日東光学株式会社 Optical disk signal detection splitter
JPS6040031U (en) * 1983-08-25 1985-03-20 日東光学株式会社 Optical disk signal detection splitter
US5161139A (en) * 1989-01-06 1992-11-03 Kabushiki Kaisha Toshiba Focusing error detecting apparatus
KR100547211B1 (en) * 1997-12-25 2006-04-10 소니 가부시끼 가이샤 Optical pickup and optical disk unit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5982336U (en) * 1982-11-24 1984-06-04 株式会社東芝 Optical disk inspection equipment
JPH04248Y2 (en) * 1982-11-24 1992-01-07
JPS6020025U (en) * 1983-07-15 1985-02-12 日東光学株式会社 Optical disk signal detection splitter
JPS6040031U (en) * 1983-08-25 1985-03-20 日東光学株式会社 Optical disk signal detection splitter
US5161139A (en) * 1989-01-06 1992-11-03 Kabushiki Kaisha Toshiba Focusing error detecting apparatus
KR100547211B1 (en) * 1997-12-25 2006-04-10 소니 가부시끼 가이샤 Optical pickup and optical disk unit

Also Published As

Publication number Publication date
JPS6331858B2 (en) 1988-06-27

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