JPS5359386A - Linear light output emission unit - Google Patents

Linear light output emission unit

Info

Publication number
JPS5359386A
JPS5359386A JP13455276A JP13455276A JPS5359386A JP S5359386 A JPS5359386 A JP S5359386A JP 13455276 A JP13455276 A JP 13455276A JP 13455276 A JP13455276 A JP 13455276A JP S5359386 A JPS5359386 A JP S5359386A
Authority
JP
Japan
Prior art keywords
monitor
light output
linear light
emission unit
led
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
JP13455276A
Other languages
Japanese (ja)
Inventor
Masabumi Igarashi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13455276A priority Critical patent/JPS5359386A/en
Publication of JPS5359386A publication Critical patent/JPS5359386A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Semiconductor Lasers (AREA)
  • Led Devices (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)

Abstract

PURPOSE:A LED for monitor drivem by the prescribed voltage and a LED are connected in paralled to the output edge of an amplifier, and a photo detector for monitor operated by the zero bias voltage is connected to the input edge. Then, the radial flux of the LED for monitor is caused to be incident to the photo detector for monitor to make a negative feedback amplifier, thereby obtaining the linear light output.
JP13455276A 1976-11-09 1976-11-09 Linear light output emission unit Pending JPS5359386A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13455276A JPS5359386A (en) 1976-11-09 1976-11-09 Linear light output emission unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13455276A JPS5359386A (en) 1976-11-09 1976-11-09 Linear light output emission unit

Publications (1)

Publication Number Publication Date
JPS5359386A true JPS5359386A (en) 1978-05-29

Family

ID=15130977

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13455276A Pending JPS5359386A (en) 1976-11-09 1976-11-09 Linear light output emission unit

Country Status (1)

Country Link
JP (1) JPS5359386A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821879A (en) * 1981-08-03 1983-02-08 Takei Kiki Kogyo Kk Intensity stabilizer for light emitting diode

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918479A (en) * 1972-04-17 1974-02-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918479A (en) * 1972-04-17 1974-02-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5821879A (en) * 1981-08-03 1983-02-08 Takei Kiki Kogyo Kk Intensity stabilizer for light emitting diode

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