JPS6484446A - Semiconductor laser light source device - Google Patents

Semiconductor laser light source device

Info

Publication number
JPS6484446A
JPS6484446A JP62242992A JP24299287A JPS6484446A JP S6484446 A JPS6484446 A JP S6484446A JP 62242992 A JP62242992 A JP 62242992A JP 24299287 A JP24299287 A JP 24299287A JP S6484446 A JPS6484446 A JP S6484446A
Authority
JP
Japan
Prior art keywords
signal
light quantity
current
light beam
light
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
JP62242992A
Other languages
Japanese (ja)
Inventor
Yuji Ohara
Takashi Shiyouji
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP62242992A priority Critical patent/JPS6484446A/en
Publication of JPS6484446A publication Critical patent/JPS6484446A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To make a feedback signal for light quantity stabilization control into a high level by providing a laser diode to monitor light quantity in addition to the laser diode to emit a light beam to be used for picture recording, etc. CONSTITUTION:The light quantity of the second light beam 12 is detected by a photodiode 24, and is outputted as the light quantity feedback signal S2 from a difference current/voltage converter 25, and a differential amplifier 23 amplifies a difference between a light quantity instruction signal S1 and the signal S2, and outputs a current instruct signal S3 to a current buffer 22, and the light quantity of the light beam 12 is controlled to a value that the signal S1 shows. Besides, the signal S3 is inputted to an adder 21 too, and the current instruction signal S5 to correct the difference between the drive current versus light output characteristics of the first and the second laser diodes 13, 14, is outputted to the current buffer 20, and a current I1 flows in the laser diode 13, and the first light beam with the same light quantity as the light beam 12 is emitted, and the light quantity of the light beam 11 is controlled to the value that the signal S1 shows.
JP62242992A 1987-09-28 1987-09-28 Semiconductor laser light source device Pending JPS6484446A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62242992A JPS6484446A (en) 1987-09-28 1987-09-28 Semiconductor laser light source device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62242992A JPS6484446A (en) 1987-09-28 1987-09-28 Semiconductor laser light source device

Publications (1)

Publication Number Publication Date
JPS6484446A true JPS6484446A (en) 1989-03-29

Family

ID=17097281

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62242992A Pending JPS6484446A (en) 1987-09-28 1987-09-28 Semiconductor laser light source device

Country Status (1)

Country Link
JP (1) JPS6484446A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6734891B2 (en) 2000-12-20 2004-05-11 Heidelberger Druckmaschinen Ag Method for the thermal stabilization of a laser diode in a recorder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6734891B2 (en) 2000-12-20 2004-05-11 Heidelberger Druckmaschinen Ag Method for the thermal stabilization of a laser diode in a recorder

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