JPS6419530A - Optical recording and reproducing device - Google Patents
Optical recording and reproducing deviceInfo
- 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
Links
Landscapes
- 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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61258367A (en) * | 1985-05-10 | 1986-11-15 | Toshiba Corp | Disk device |
-
1987
- 1987-07-15 JP JP62176166A patent/JP2578816B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61258367A (en) * | 1985-05-10 | 1986-11-15 | Toshiba Corp | Disk device |
Cited By (5)
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 |