JPS54103307A - Optical recorder-reproducer - Google Patents

Optical recorder-reproducer

Info

Publication number
JPS54103307A
JPS54103307A JP1023378A JP1023378A JPS54103307A JP S54103307 A JPS54103307 A JP S54103307A JP 1023378 A JP1023378 A JP 1023378A JP 1023378 A JP1023378 A JP 1023378A JP S54103307 A JPS54103307 A JP S54103307A
Authority
JP
Japan
Prior art keywords
lens
light
semiconductor laser
medium
light beam
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
JP1023378A
Other languages
Japanese (ja)
Inventor
Toshio Sato
Tomio Yoshida
Akifumi Nakada
Shunji Harikae
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 JP1023378A priority Critical patent/JPS54103307A/en
Publication of JPS54103307A publication Critical patent/JPS54103307A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To transmit the energies of the light beams of a semiconductor laser efficiently and reduce the focus to a minute spot by using the semiconductor laser for an information recording light source and a gas laser for a focus controlling auxiliary light source.
CONSTITUTION: Recording signal modulates the light beam L1 of a semiconductor laser 1 by way of a driving circuit 2. And the modulated light is recorded on a recording medium 9 by way of concave and convex cylindrical lenses 4, 5, tracking mirror 6, iris lens 7. On the other hand, the light beam L2 of a gas laser 11 is projected to the medium 9 via projecting lens 12, beam splitter 13, tracking mirror 14, lens 7 and the reflected light thereof is changed of its optical path by the mirror 14 and is received in an element 15 via the splitter 13. The supporting device 8 of the lens 7 is then controlled by the output of a differential amplifier 16, whereby the distance between the lens 7 and disc 9 is maintained constant. At the reproducing of th information, the light beam L1 is set at a weak constant output, and the transmitted light of the medium 9 is received 17 and outputted.
COPYRIGHT: (C)1979,JPO&Japio
JP1023378A 1978-01-31 1978-01-31 Optical recorder-reproducer Pending JPS54103307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1023378A JPS54103307A (en) 1978-01-31 1978-01-31 Optical recorder-reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1023378A JPS54103307A (en) 1978-01-31 1978-01-31 Optical recorder-reproducer

Publications (1)

Publication Number Publication Date
JPS54103307A true JPS54103307A (en) 1979-08-14

Family

ID=11744567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1023378A Pending JPS54103307A (en) 1978-01-31 1978-01-31 Optical recorder-reproducer

Country Status (1)

Country Link
JP (1) JPS54103307A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4345321A (en) * 1979-06-26 1982-08-17 Thomson-Csf Semiconductor laser source optical reading head
JPS5826336A (en) * 1981-08-06 1983-02-16 Pioneer Electronic Corp Recorder and reproducer of magnetooptic recording system
JPS63185517U (en) * 1987-05-20 1988-11-29
US5123007A (en) * 1986-05-02 1992-06-16 Hitachi, Ltd. Method for recording, reproducing and erasing information and thin film for recording information

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4345321A (en) * 1979-06-26 1982-08-17 Thomson-Csf Semiconductor laser source optical reading head
JPS5826336A (en) * 1981-08-06 1983-02-16 Pioneer Electronic Corp Recorder and reproducer of magnetooptic recording system
US5123007A (en) * 1986-05-02 1992-06-16 Hitachi, Ltd. Method for recording, reproducing and erasing information and thin film for recording information
JPS63185517U (en) * 1987-05-20 1988-11-29

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