JPS54140413A - Camera - Google Patents

Camera

Info

Publication number
JPS54140413A
JPS54140413A JP4800278A JP4800278A JPS54140413A JP S54140413 A JPS54140413 A JP S54140413A JP 4800278 A JP4800278 A JP 4800278A JP 4800278 A JP4800278 A JP 4800278A JP S54140413 A JPS54140413 A JP S54140413A
Authority
JP
Japan
Prior art keywords
laser
supplied
semiconductor laser
medium
output
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
JP4800278A
Other languages
Japanese (ja)
Inventor
Hiroshi Hanada
Isao Yamaguchi
Takeshi Sawada
Yuzo Kato
Kazuya Matsumoto
Yasushi Takatori
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP4800278A priority Critical patent/JPS54140413A/en
Publication of JPS54140413A publication Critical patent/JPS54140413A/en
Pending legal-status Critical Current

Links

Landscapes

  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: To secure the semipermanent preservation by applying the recording/ reproducing method via the laser beam as the non-contact electronic recording/reproducing method.
CONSTITUTION: The picture supplied to optical system 1 is read out in the form of the time-series image information signal by the clock signal of scan control circuit 3 and through photoelectric converter 2 such as CCD or the like. This information signal is then supplied to semiconductor laser driving power source 5 to control the output of the semiconductor laser. And the output light is condensed on turning recording medium 7 by motor 10 and via optical system 6, and the heat of the condensing causes the change which can be detected optically between the medium 7 and the non-irradiation part. When the reflected light from medium 7 is returned to the active region of semiconductor laser 4, laser 4 cuases the quenching phenomenon to cause lowering of the terminal voltage. This terminal voltage is detected at detection circuit 19 and then supplied to central control circuit 20 to control the positions of laser 4 and system 6 as well as the laser output as a whole, etc.
COPYRIGHT: (C)1979,JPO&Japio
JP4800278A 1978-04-23 1978-04-23 Camera Pending JPS54140413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4800278A JPS54140413A (en) 1978-04-23 1978-04-23 Camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4800278A JPS54140413A (en) 1978-04-23 1978-04-23 Camera

Publications (1)

Publication Number Publication Date
JPS54140413A true JPS54140413A (en) 1979-10-31

Family

ID=12791093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4800278A Pending JPS54140413A (en) 1978-04-23 1978-04-23 Camera

Country Status (1)

Country Link
JP (1) JPS54140413A (en)

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