JPS55125545A - Optical information recorder/reproducer - Google Patents

Optical information recorder/reproducer

Info

Publication number
JPS55125545A
JPS55125545A JP3268279A JP3268279A JPS55125545A JP S55125545 A JPS55125545 A JP S55125545A JP 3268279 A JP3268279 A JP 3268279A JP 3268279 A JP3268279 A JP 3268279A JP S55125545 A JPS55125545 A JP S55125545A
Authority
JP
Japan
Prior art keywords
light detector
mirror
point
reproducer
movable mirror
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
JP3268279A
Other languages
Japanese (ja)
Inventor
Toru Nakamura
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 JP3268279A priority Critical patent/JPS55125545A/en
Publication of JPS55125545A publication Critical patent/JPS55125545A/en
Pending legal-status Critical Current

Links

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To make it possible to satisfactorily detect various signals such as a tracking signal, etc., by arranging a light detector at the position which in not affected by rotation of a movable mirror. CONSTITUTION:A half mirror 8 is mounted between movable mirror 2 and a condensing lens 3, and divides a reflected ray which comes from the information recording surface 4. And a point which is equivalent to an image point G' by the lense 3 is made G''', and when the mirror 2 has been rotated, a signal is detected by a light detector 7 which is mounted at the point G'''. Accordingly, a light spot of proper size which is not affected by rotation of the movable mirror 2 is formed on the light detector 7.
JP3268279A 1979-03-20 1979-03-20 Optical information recorder/reproducer Pending JPS55125545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3268279A JPS55125545A (en) 1979-03-20 1979-03-20 Optical information recorder/reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3268279A JPS55125545A (en) 1979-03-20 1979-03-20 Optical information recorder/reproducer

Publications (1)

Publication Number Publication Date
JPS55125545A true JPS55125545A (en) 1980-09-27

Family

ID=12365637

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3268279A Pending JPS55125545A (en) 1979-03-20 1979-03-20 Optical information recorder/reproducer

Country Status (1)

Country Link
JP (1) JPS55125545A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381557A (en) * 1980-12-19 1983-04-26 Rca Corporation Optical focus sensor
US4682315A (en) * 1984-06-22 1987-07-21 Fuji Photo Film Co., Ltd. Focussing error detection device for use in optical disk type recording system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381557A (en) * 1980-12-19 1983-04-26 Rca Corporation Optical focus sensor
US4682315A (en) * 1984-06-22 1987-07-21 Fuji Photo Film Co., Ltd. Focussing error detection device for use in optical disk type recording system

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