JPS55118184A - Optical recording device - Google Patents

Optical recording device

Info

Publication number
JPS55118184A
JPS55118184A JP2553079A JP2553079A JPS55118184A JP S55118184 A JPS55118184 A JP S55118184A JP 2553079 A JP2553079 A JP 2553079A JP 2553079 A JP2553079 A JP 2553079A JP S55118184 A JPS55118184 A JP S55118184A
Authority
JP
Japan
Prior art keywords
record signal
rise
fall
correction
signal
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
JP2553079A
Other languages
Japanese (ja)
Other versions
JPS6131507B2 (en
Inventor
Yoshidai Kitaoka
Masahiro Takasago
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2553079A priority Critical patent/JPS55118184A/en
Publication of JPS55118184A publication Critical patent/JPS55118184A/en
Publication of JPS6131507B2 publication Critical patent/JPS6131507B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the accurate reproduction data by giving the correction to both the rise and fall timing of the record signal and thus eliminating the extension component of the spot which is caused by the thickness of the light beam.
CONSTITUTION: Record signal 25 is supplied to rise and fall phase correction circuits 7 and 8 within correction circuit 11. Mixer circuit 9 mixes up the output of circuits 7 and 8, and then gives the phase delay and the phase gain to the rise and the fall respectively to deliver record signal 24. Optical modulator 2 keeps output beam 21 at a high level for the high-level period of correcting record signal 24 and also keeps the output beam at a low level for the low-level period of signal 24 respectively.
COPYRIGHT: (C)1980,JPO&Japio
JP2553079A 1979-03-07 1979-03-07 Optical recording device Granted JPS55118184A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2553079A JPS55118184A (en) 1979-03-07 1979-03-07 Optical recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2553079A JPS55118184A (en) 1979-03-07 1979-03-07 Optical recording device

Publications (2)

Publication Number Publication Date
JPS55118184A true JPS55118184A (en) 1980-09-10
JPS6131507B2 JPS6131507B2 (en) 1986-07-21

Family

ID=12168582

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2553079A Granted JPS55118184A (en) 1979-03-07 1979-03-07 Optical recording device

Country Status (1)

Country Link
JP (1) JPS55118184A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62185250A (en) * 1986-02-10 1987-08-13 Ricoh Co Ltd Pit recording method by light irradiation
JPH02122436A (en) * 1988-10-31 1990-05-10 Nec Corp Optical recording and reproducing device
JPH02122434A (en) * 1988-10-31 1990-05-10 Nec Corp Optical recording and reproducing device
JPH0431420U (en) * 1990-06-29 1992-03-13

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62185250A (en) * 1986-02-10 1987-08-13 Ricoh Co Ltd Pit recording method by light irradiation
JPH02122436A (en) * 1988-10-31 1990-05-10 Nec Corp Optical recording and reproducing device
JPH02122434A (en) * 1988-10-31 1990-05-10 Nec Corp Optical recording and reproducing device
JPH0431420U (en) * 1990-06-29 1992-03-13

Also Published As

Publication number Publication date
JPS6131507B2 (en) 1986-07-21

Similar Documents

Publication Publication Date Title
JPS5388517A (en) Noise eliminating circuit of solid state pickup device
JPS51151150A (en) Optical record reproducing reproducer in signal
JPS53111708A (en) Vide signal reproducing circuit
JPS55118184A (en) Optical recording device
JPS5437787A (en) Waveform comparative display method using crt
JPS5767955A (en) Image recorder
JPS56153560A (en) Corrector for time axis error
JPS53115129A (en) Time axis correcting device
JPS57181432A (en) Optical type disc reproducer
JPS53141606A (en) Reproducer
JPS5437487A (en) Dark current compensating method for solid state pickup element
JPS5397722A (en) Record information reproducer
JPS5622294A (en) Memory circuit
JPS5315116A (en) Automatic gain adjustment system
JPS55133010A (en) Light beam scanner
JPS53118917A (en) Correction method for digital signal
JPS6430030A (en) Optical disk device
JPS5280803A (en) Automatic focusing device
JPS53149035A (en) Zerography
JPS5545147A (en) Magnetic recording and reproducing device
JPS54153006A (en) Controlling methof for drift of reproduction light power of image signal
JPS51146869A (en) Peak tracking circuit
JPS548422A (en) Multiple beam modulation system
JPS5750323A (en) Video signal recording and reproducing device
JPS5283215A (en) Automatic slice level compensation read circuit