JPS6419530A - Optical recording and reproducing device - Google Patents

Optical recording and reproducing device

Info

Publication number
JPS6419530A
JPS6419530A JP17616687A JP17616687A JPS6419530A JP S6419530 A JPS6419530 A JP S6419530A JP 17616687 A JP17616687 A JP 17616687A JP 17616687 A JP17616687 A JP 17616687A JP S6419530 A JPS6419530 A JP S6419530A
Authority
JP
Japan
Prior art keywords
disk
lambda
optical
differential
differential 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
JP17616687A
Other languages
Japanese (ja)
Other versions
JP2578816B2 (en
Inventor
Kenji Koishi
Takashi Inoue
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62176166A priority Critical patent/JP2578816B2/en
Publication of JPS6419530A publication Critical patent/JPS6419530A/en
Application granted granted Critical
Publication of JP2578816B2 publication Critical patent/JP2578816B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To discriminate the classification of a disk without using the identifier of a cartridge by receiving the reflection light emitted from an optical disk by an optical detector and processing the total signal and differential signal thereof. CONSTITUTION:The reflection light having a different phase structure emitted from an optical disk is received by an optical detector to identify the optical disk 7 in three kinds of different structure by the characteristics of the total signal waveform and differential signal waveform. A 1st disk (sample format) is of lambda/4 bit only and a differential signal is hardly generated and can be discriminated by a reference level 25. A 2nd disk (ingroove record) is composed of lambda/8 bit only, a 3rd disk (intergroove record) is composed of lambda/8 continuous groove and lambda/4 index and the classification of the disk can be discriminated without using the identifier of a cartridge by comparing the differential level in the total signal 23, 26 thereof with a reference level 29.
JP62176166A 1987-07-15 1987-07-15 Optical recording / reproducing device Expired - Fee Related JP2578816B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62176166A JP2578816B2 (en) 1987-07-15 1987-07-15 Optical recording / reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62176166A JP2578816B2 (en) 1987-07-15 1987-07-15 Optical recording / reproducing device

Publications (2)

Publication Number Publication Date
JPS6419530A true JPS6419530A (en) 1989-01-23
JP2578816B2 JP2578816B2 (en) 1997-02-05

Family

ID=16008818

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62176166A Expired - Fee Related JP2578816B2 (en) 1987-07-15 1987-07-15 Optical recording / reproducing device

Country Status (1)

Country Link
JP (1) JP2578816B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580066A2 (en) * 1992-07-16 1994-01-26 Matsushita Electric Industrial Co., Ltd. Write/read device of optical information
EP1643313A3 (en) * 2004-09-29 2007-07-04 Brother Kogyo Kabushiki Kaisha Recording medium conveying device, image forming apparatus and cartridge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61258367A (en) * 1985-05-10 1986-11-15 Toshiba Corp Disk device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61258367A (en) * 1985-05-10 1986-11-15 Toshiba Corp Disk device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580066A2 (en) * 1992-07-16 1994-01-26 Matsushita Electric Industrial Co., Ltd. Write/read device of optical information
EP0580066A3 (en) * 1992-07-16 1994-10-12 Matsushita Electric Ind Co Ltd Write/read device of optical information.
EP1643313A3 (en) * 2004-09-29 2007-07-04 Brother Kogyo Kabushiki Kaisha Recording medium conveying device, image forming apparatus and cartridge
US7506866B2 (en) 2004-09-29 2009-03-24 Brother Kogyo Kabushiki Kaisha Recording medium conveying device, image forming apparatus and cartridge
US7862030B2 (en) 2004-09-29 2011-01-04 Brother Kogyo Kabushiki Kaisha Recording medium conveying device, image forming apparatus and cartridge

Also Published As

Publication number Publication date
JP2578816B2 (en) 1997-02-05

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees