JPS6449140A - Multiplex recording and reproducing device based upon optical wavelength - Google Patents

Multiplex recording and reproducing device based upon optical wavelength

Info

Publication number
JPS6449140A
JPS6449140A JP62206895A JP20689587A JPS6449140A JP S6449140 A JPS6449140 A JP S6449140A JP 62206895 A JP62206895 A JP 62206895A JP 20689587 A JP20689587 A JP 20689587A JP S6449140 A JPS6449140 A JP S6449140A
Authority
JP
Japan
Prior art keywords
beams
medium
wavelengths
wavelength
condensed
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
JP62206895A
Other languages
Japanese (ja)
Other versions
JP2632318B2 (en
Inventor
Koichi Takeuchi
Koichi Yamada
Kyosuke Yoshimoto
Motomu Yoshimura
Mitsuo Maeda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62206895A priority Critical patent/JP2632318B2/en
Priority to US07/231,881 priority patent/US5107483A/en
Priority to DE3827667A priority patent/DE3827667A1/en
Publication of JPS6449140A publication Critical patent/JPS6449140A/en
Application granted granted Critical
Publication of JP2632318B2 publication Critical patent/JP2632318B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/0045—Recording
    • G11B7/00453—Recording involving spectral or photochemical hole burning
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optical Head (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To attain high information recording density based upon multiplex recording by guiding optical beams with plural different wavelengths to a fixed optical path by means of an optical element having reflective index wavelength dispersing property and concentrating the beams into a medium. CONSTITUTION:Recording, data erasing, focusing/tracking, and focusing wavelength variable lasers LD1-LD4 are arranged on an optical head 10. These lasers LD1-LD4 emit laser beams having respectively different wavelengths. A dichroic mirror (DM) 111 transmits only the wavelength band light of the LD1 and reflects beams having other wavelength bands. Respective DMs 112-114 reflect only the beams of wavelengths corresponding to the LD2-LD4 and transmit other beams. Thereby, all beams are made incident upon a deflecting beam splitter 105 and condensed into the medium 5. The emitted beams and reflected beams from the medium 5 are simultaneously and dispersely condensed into different positions corresponding to respective wavelengths by a hologram lens 108. Said constitution makes it possible to attain high information recording density.
JP62206895A 1987-08-19 1987-08-19 Optical wavelength multiplexing recording / reproducing device Expired - Lifetime JP2632318B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP62206895A JP2632318B2 (en) 1987-08-19 1987-08-19 Optical wavelength multiplexing recording / reproducing device
US07/231,881 US5107483A (en) 1987-08-19 1988-08-12 Frequency selective optical data record/regenerate apparatus
DE3827667A DE3827667A1 (en) 1987-08-19 1988-08-16 Frequency-selective optical data recording and data reproduction apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62206895A JP2632318B2 (en) 1987-08-19 1987-08-19 Optical wavelength multiplexing recording / reproducing device

Publications (2)

Publication Number Publication Date
JPS6449140A true JPS6449140A (en) 1989-02-23
JP2632318B2 JP2632318B2 (en) 1997-07-23

Family

ID=16530836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62206895A Expired - Lifetime JP2632318B2 (en) 1987-08-19 1987-08-19 Optical wavelength multiplexing recording / reproducing device

Country Status (2)

Country Link
JP (1) JP2632318B2 (en)
DE (1) DE3827667A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5510317A (en) * 1992-12-02 1996-04-23 Central Glass Co. Ltd. N-acyl-N-phenylmaleamic acid derivatives, methods of producing same, and herbicides containing same as effective components

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04259921A (en) * 1991-02-15 1992-09-16 Ricoh Co Ltd Optical disk device
DE19732065A1 (en) * 1997-07-25 1999-01-28 Harm Drecoll Information storage on a storage medium
DE29719613U1 (en) * 1997-11-05 1998-07-30 Junike, Nils, 22391 Hamburg Optical storage system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992447A (en) * 1982-11-18 1984-05-28 Nec Corp Double beam optical head

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4101976A (en) * 1977-02-14 1978-07-18 International Business Machines Corporation Frequency selective optical data storage system
JPS5851355A (en) * 1981-09-22 1983-03-26 Fujitsu Ltd Program access system
JPS5936338A (en) * 1982-08-24 1984-02-28 Matsushita Electric Ind Co Ltd Optical disk recording and reproducing method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992447A (en) * 1982-11-18 1984-05-28 Nec Corp Double beam optical head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5510317A (en) * 1992-12-02 1996-04-23 Central Glass Co. Ltd. N-acyl-N-phenylmaleamic acid derivatives, methods of producing same, and herbicides containing same as effective components

Also Published As

Publication number Publication date
DE3827667C2 (en) 1990-06-21
DE3827667A1 (en) 1989-03-02
JP2632318B2 (en) 1997-07-23

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