JPS5792438A - Recording method by laser beam - Google Patents

Recording method by laser beam

Info

Publication number
JPS5792438A
JPS5792438A JP55168277A JP16827780A JPS5792438A JP S5792438 A JPS5792438 A JP S5792438A JP 55168277 A JP55168277 A JP 55168277A JP 16827780 A JP16827780 A JP 16827780A JP S5792438 A JPS5792438 A JP S5792438A
Authority
JP
Japan
Prior art keywords
semiconductor laser
light
output
recording
optical disk
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
JP55168277A
Other languages
Japanese (ja)
Other versions
JPH0213372B2 (en
Inventor
Michiharu Abe
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55168277A priority Critical patent/JPS5792438A/en
Publication of JPS5792438A publication Critical patent/JPS5792438A/en
Publication of JPH0213372B2 publication Critical patent/JPH0213372B2/ja
Granted 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
    • G11B7/12—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
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Head (AREA)

Abstract

PURPOSE:To stabilize optical recording by irradiating a recording medium with semiconductor laser light while modulating the laser beam, by feeding its reflected light to a semiconductor laser, and by confirming a recording state by detecting the feedback output. CONSTITUTION:Light 6 emitted from a semiconductor laser 5 passes through a coupling lens 7, a quarter-wavelength plate 8, and a condenser lens 9 to be focused on the metallic film 16 of an optical disk 17, and its reflected light travels backward to be fed back to the semiconductor laser 5. The output of the semiconductor laser 5 is modulated by a modulating current which corresponds to information and while the optical disk 17 is turning, the output light 12 of the semiconductor laser 5 is detected by a photodetector 13, such as a PIN diode, to observe a detection signal 14, thereby optimizing the output of the light under automatic control. Consequently, optical recording is performed stably.
JP55168277A 1980-11-28 1980-11-28 Recording method by laser beam Granted JPS5792438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55168277A JPS5792438A (en) 1980-11-28 1980-11-28 Recording method by laser beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55168277A JPS5792438A (en) 1980-11-28 1980-11-28 Recording method by laser beam

Publications (2)

Publication Number Publication Date
JPS5792438A true JPS5792438A (en) 1982-06-09
JPH0213372B2 JPH0213372B2 (en) 1990-04-04

Family

ID=15865029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55168277A Granted JPS5792438A (en) 1980-11-28 1980-11-28 Recording method by laser beam

Country Status (1)

Country Link
JP (1) JPS5792438A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961984A (en) * 1982-09-30 1984-04-09 Sharp Corp Semiconductor laser device
JPS60145537A (en) * 1984-01-10 1985-08-01 Nec Corp Optical information recording system and its device
JPH0460921A (en) * 1990-06-27 1992-02-26 Nippon Columbia Co Ltd Optical recording and reproducing device
US5798993A (en) * 1995-05-29 1998-08-25 Nec Corporation System and method for simultaneously verifying optical data writing and optical data writing medium for use therein
EP1207525A2 (en) * 2000-11-15 2002-05-22 Ricoh Company, Ltd. Optical information recording employing improved recording power control scheme

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5365116A (en) * 1976-11-24 1978-06-10 Tokyo Shibaura Electric Co Serial printer
JPS5553776A (en) * 1978-10-13 1980-04-19 Nec Corp Optical information reading method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5365116A (en) * 1976-11-24 1978-06-10 Tokyo Shibaura Electric Co Serial printer
JPS5553776A (en) * 1978-10-13 1980-04-19 Nec Corp Optical information reading method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5961984A (en) * 1982-09-30 1984-04-09 Sharp Corp Semiconductor laser device
JPS60145537A (en) * 1984-01-10 1985-08-01 Nec Corp Optical information recording system and its device
JPH0460921A (en) * 1990-06-27 1992-02-26 Nippon Columbia Co Ltd Optical recording and reproducing device
US5798993A (en) * 1995-05-29 1998-08-25 Nec Corporation System and method for simultaneously verifying optical data writing and optical data writing medium for use therein
EP1207525A2 (en) * 2000-11-15 2002-05-22 Ricoh Company, Ltd. Optical information recording employing improved recording power control scheme
US6664526B2 (en) 2000-11-15 2003-12-16 Ricoh Company, Ltd. Optical information recording employing improved recording power control scheme
US6781105B2 (en) 2000-11-15 2004-08-24 Ricoh Company, Ltd. Optical information recording employing improved recording power control scheme
EP1207525A3 (en) * 2000-11-15 2005-03-09 Ricoh Company, Ltd. Optical information recording employing improved recording power control scheme
US7019273B2 (en) 2000-11-15 2006-03-28 Ricoh Company, Ltd. Optical information recording employing improved recording power control scheme

Also Published As

Publication number Publication date
JPH0213372B2 (en) 1990-04-04

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