JPS536001A - Focus location detector for optical recording medium - Google Patents

Focus location detector for optical recording medium

Info

Publication number
JPS536001A
JPS536001A JP7981976A JP7981976A JPS536001A JP S536001 A JPS536001 A JP S536001A JP 7981976 A JP7981976 A JP 7981976A JP 7981976 A JP7981976 A JP 7981976A JP S536001 A JPS536001 A JP S536001A
Authority
JP
Japan
Prior art keywords
recording medium
optical recording
location detector
focus location
focus
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
JP7981976A
Other languages
Japanese (ja)
Inventor
Shigeo Tsuji
Takahisa Aikawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7981976A priority Critical patent/JPS536001A/en
Publication of JPS536001A publication Critical patent/JPS536001A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To detect with high precision the location of the focal plane of a data record disk, by enlarging the movement of the light beams on a photodetector element surface.
COPYRIGHT: (C)1978,JPO&Japio
JP7981976A 1976-07-07 1976-07-07 Focus location detector for optical recording medium Pending JPS536001A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7981976A JPS536001A (en) 1976-07-07 1976-07-07 Focus location detector for optical recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7981976A JPS536001A (en) 1976-07-07 1976-07-07 Focus location detector for optical recording medium

Publications (1)

Publication Number Publication Date
JPS536001A true JPS536001A (en) 1978-01-20

Family

ID=13700802

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7981976A Pending JPS536001A (en) 1976-07-07 1976-07-07 Focus location detector for optical recording medium

Country Status (1)

Country Link
JP (1) JPS536001A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01151428U (en) * 1988-04-06 1989-10-19

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01151428U (en) * 1988-04-06 1989-10-19

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