JPH01116962U - - Google Patents
Info
- Publication number
- JPH01116962U JPH01116962U JP1129088U JP1129088U JPH01116962U JP H01116962 U JPH01116962 U JP H01116962U JP 1129088 U JP1129088 U JP 1129088U JP 1129088 U JP1129088 U JP 1129088U JP H01116962 U JPH01116962 U JP H01116962U
- Authority
- JP
- Japan
- Prior art keywords
- disk
- detects
- optical
- optical head
- head
- 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
Links
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Moving Of Head For Track Selection And Changing (AREA)
Description
第1図は本考案の一実施例の光デイスク装置の
ヘツド位置検出部分の構成を示すブロツク図、第
2図は第1図のインクリメンタル・カウンタ1か
らの出力信号A,Bを例示する波形図である。
1……インクリメンタル・カウンタ、2……ア
ツプダウン・カウンタ、3……最内周検出スイツ
チ、4……最外周検出回路、11……スリツト板
、12……発光ダイオード、13……レンズ、1
4,15……フオトセンサ、16,17……電圧
比較器。
FIG. 1 is a block diagram showing the configuration of a head position detection portion of an optical disk device according to an embodiment of the present invention, and FIG. 2 is a waveform diagram illustrating output signals A and B from the incremental counter 1 of FIG. It is. 1... Incremental counter, 2... Up-down counter, 3... Innermost circumference detection switch, 4... Outermost circumference detection circuit, 11... Slit plate, 12... Light emitting diode, 13... Lens, 1
4, 15...Photo sensor, 16, 17...Voltage comparator.
Claims (1)
状のグルーブに情報を書込み、あるいはこれから
情報を読出す光ヘツドと、 この光ヘツドがデイスク最内周に位置すること
を検出する最内周検出スイツチによつてリセツト
されると共に、光ヘツドのデイスク径方向への移
動を検出するインクリメンタル・エンコーダによ
つて駆動されるアツプダウン・カウンタと、 このアツプダウン・カウンタの内容を所定値と
照合し照合一致を以て光ヘツドがデイスク最外周
に位置することを検出する最外周検出回路とを備
えたことを特徴とする光デイスク装置。[Claims for Utility Model Registration] An optical disk having a spiral groove; an optical head that writes information to or reads information from the spiral groove while moving in the radial direction of the optical disk; An up-down counter is reset by an innermost detection switch that detects that the head is located at the innermost circumference of the disk, and is also driven by an incremental encoder that detects movement of the optical head in the disk radial direction. and an outermost circumference detection circuit that compares the contents of the up-down counter with a predetermined value and detects that the optical head is located at the outermost circumference of the disk upon a match.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1129088U JPH01116962U (en) | 1988-01-30 | 1988-01-30 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1129088U JPH01116962U (en) | 1988-01-30 | 1988-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01116962U true JPH01116962U (en) | 1989-08-07 |
Family
ID=31219713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1129088U Pending JPH01116962U (en) | 1988-01-30 | 1988-01-30 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01116962U (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58158080A (en) * | 1982-03-15 | 1983-09-20 | Toshiba Corp | Information recording device |
JPS59127271A (en) * | 1983-01-07 | 1984-07-23 | Canon Inc | Feeding device of transducer |
-
1988
- 1988-01-30 JP JP1129088U patent/JPH01116962U/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58158080A (en) * | 1982-03-15 | 1983-09-20 | Toshiba Corp | Information recording device |
JPS59127271A (en) * | 1983-01-07 | 1984-07-23 | Canon Inc | Feeding device of transducer |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE68901868D1 (en) | REFLECTION TYPE PHOTOELECTRIC SWITCHGEAR. | |
JPS60134117U (en) | optical rotary encoder | |
JPH02121708U (en) | ||
KR970066626A (en) | Encoder to detect forward / reverse rotation | |
JPH01116962U (en) | ||
JP2535873B2 (en) | Disk device | |
JPS6449823U (en) | ||
JPS62175414U (en) | ||
JPH0177072U (en) | ||
JPH0276321U (en) | ||
JPS6245737U (en) | ||
JPS60108200U (en) | Stepping motor drive circuit | |
JPS6437958U (en) | ||
JPS629115U (en) | ||
JPH0336985U (en) | ||
JPH06324069A (en) | Optical movement detector | |
JPH0268537U (en) | ||
JPH042317U (en) | ||
JPS6224561U (en) | ||
JPH03100833U (en) | ||
JPS6124614U (en) | optical rotary encoder | |
JPS6448230A (en) | Optical disk drive device | |
JPH0260925U (en) | ||
JPS60193414U (en) | optical encoder | |
JPS60146967U (en) | Movement detection device for information recording and/or reading means |