JPH0323819U - - Google Patents

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Publication number
JPH0323819U
JPH0323819U JP8409489U JP8409489U JPH0323819U JP H0323819 U JPH0323819 U JP H0323819U JP 8409489 U JP8409489 U JP 8409489U JP 8409489 U JP8409489 U JP 8409489U JP H0323819 U JPH0323819 U JP H0323819U
Authority
JP
Japan
Prior art keywords
power
recording
light intensity
reproducing device
controlling
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
JP8409489U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP8409489U priority Critical patent/JPH0323819U/ja
Publication of JPH0323819U publication Critical patent/JPH0323819U/ja
Pending legal-status Critical Current

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Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例を示すブロツク図、
第２図はその動作説明に供する各部波形図である
。 ３…光ピツクアツプ、７…サンプルホールド回
路、８…誤差増幅器、９…電圧電流変換器、１０
…電流加算供給回路、１２…記録パワー設定回路
。 FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a waveform diagram of each part to explain its operation. 3... Optical pickup, 7... Sample hold circuit, 8... Error amplifier, 9... Voltage current converter, 10
...Current addition supply circuit, 12... Recording power setting circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 光記録媒体に対してレーザ光を照射して情報の
記録及び再生を行う光学的記録再生装置において
、半導体レーザ出力を再生パワーと記録パワーと
に切替え制御する手段と、再生パワー時のレーザ
光強度を検出してこれをサンプルする手段と、記
録パワー時に上記レーザ光強度のサンプル値をホ
ールドする手段とを有し、該サンプルホールド値
に応じて半導体レーザ出力パワーを制御すること
を特徴とした光学的記録再生装置。 In an optical recording and reproducing device that records and reproduces information by irradiating a laser beam onto an optical recording medium, there is provided a means for switching and controlling semiconductor laser output between reproduction power and recording power, and laser light intensity at reproduction power. and a means for holding the sample value of the laser light intensity during recording power, and controlling the semiconductor laser output power according to the sample hold value. Recording and reproducing device.
JP8409489U 1989-07-19 1989-07-19 Pending JPH0323819U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8409489U JPH0323819U (en) 1989-07-19 1989-07-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8409489U JPH0323819U (en) 1989-07-19 1989-07-19

Publications (1)

Publication Number Publication Date
JPH0323819U true JPH0323819U (en) 1991-03-12

Family

ID=31632294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8409489U Pending JPH0323819U (en) 1989-07-19 1989-07-19

Country Status (1)

Country Link
JP (1) JPH0323819U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58158051A (en) * 1982-03-15 1983-09-20 Toshiba Corp Controller for stabilizing output of semiconductor laser oscillator
JPH02257441A (en) * 1989-03-29 1990-10-18 Digital Sutoriimu:Kk System for controlling emissive light quantity of laser diode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58158051A (en) * 1982-03-15 1983-09-20 Toshiba Corp Controller for stabilizing output of semiconductor laser oscillator
JPH02257441A (en) * 1989-03-29 1990-10-18 Digital Sutoriimu:Kk System for controlling emissive light quantity of laser diode

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