JPS5771527A - Optical recording and reproducing system - Google Patents

Optical recording and reproducing system

Info

Publication number
JPS5771527A
JPS5771527A JP14681880A JP14681880A JPS5771527A JP S5771527 A JPS5771527 A JP S5771527A JP 14681880 A JP14681880 A JP 14681880A JP 14681880 A JP14681880 A JP 14681880A JP S5771527 A JPS5771527 A JP S5771527A
Authority
JP
Japan
Prior art keywords
output
recording
reproducing
optical system
monitoring
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
JP14681880A
Other languages
Japanese (ja)
Inventor
Akihiko Kuroiwa
Kazuo Takahashi
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP14681880A priority Critical patent/JPS5771527A/en
Publication of JPS5771527A publication Critical patent/JPS5771527A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To perform recording/reproducing and monitoring with a single optical system by such constitution wherein the light transmitting through the fine pores on a recording medium is received with a photodetector and is made into a monitoring output for recording through a threshold circuit by a selection switch. CONSTITUTION:If a writing laser beam 3 is focused on a recording medium 1 by an optical system 10, a hole 1a is formed. The light transmitted therethrough is made incident to a photodetector 6, the output whereof is fed via a switch 11 to a threshold circuit 13, by which an output level is discriminated; thereafter, it is supplied as a monitoring output to a reproducing output terminal 14. At the reproducing, on the other hand, a laser beam 5 for read out is irradiated onto the medium 1 by the optical system 10, and the output of the photodetector 6 by the light transmitted through the fine hole 1a is applied to the terminal 14 through the switch 11 connected to the contact (a). Thereby, the recording/reproducing and monitoring at the recording are made possible by the single optical system.
JP14681880A 1980-10-22 1980-10-22 Optical recording and reproducing system Pending JPS5771527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14681880A JPS5771527A (en) 1980-10-22 1980-10-22 Optical recording and reproducing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14681880A JPS5771527A (en) 1980-10-22 1980-10-22 Optical recording and reproducing system

Publications (1)

Publication Number Publication Date
JPS5771527A true JPS5771527A (en) 1982-05-04

Family

ID=15416218

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14681880A Pending JPS5771527A (en) 1980-10-22 1980-10-22 Optical recording and reproducing system

Country Status (1)

Country Link
JP (1) JPS5771527A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59154651A (en) * 1983-02-24 1984-09-03 Canon Inc Information recording and reproducing device
CN104475549A (en) * 2014-12-20 2015-04-01 无锡朗贤汽车组件研发中心有限公司 Separation device capable of reducing punching loss of hot-forming steel plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59154651A (en) * 1983-02-24 1984-09-03 Canon Inc Information recording and reproducing device
CN104475549A (en) * 2014-12-20 2015-04-01 无锡朗贤汽车组件研发中心有限公司 Separation device capable of reducing punching loss of hot-forming steel plate

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