JPS61170122U - - Google Patents
Info
- Publication number
- JPS61170122U JPS61170122U JP5398385U JP5398385U JPS61170122U JP S61170122 U JPS61170122 U JP S61170122U JP 5398385 U JP5398385 U JP 5398385U JP 5398385 U JP5398385 U JP 5398385U JP S61170122 U JPS61170122 U JP S61170122U
- Authority
- JP
- Japan
- Prior art keywords
- signal surface
- heater
- optical pickup
- disc
- photodetector
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Optical Head (AREA)
Description
第１図、第２図は本考案にかかる光ピツクアツ
プ説明図、第３図は本考案の別の実施例説明図、
第４図は光ピツクアツプの光学系説明図。
１５……対物レンズ、５１……ヒータ、５２…
…光学ヘツド、５３……温度スイツチ、１０１…
…エンジンスイツチ、１０２……温度センサ、１
０３……ヒータ、１０４……フリツプフロツプ、
１０６……光検出器、１０９……検波器、１１１
……比較回路。
1 and 2 are diagrams for explaining an optical pickup according to the present invention, and FIG. 3 is a diagram for explaining another embodiment of the present invention.
FIG. 4 is an explanatory diagram of the optical system of the optical pickup. 15...Objective lens, 51...Heater, 52...
...Optical head, 53...Temperature switch, 101...
...Engine switch, 102...Temperature sensor, 1
03...Heater, 104...Flip-flop,
106...Photodetector, 109...Detector, 111
...Comparison circuit.
Claims (1)
イスク信号面に当て、その反射光を光検出器で検
出して該デイスク信号面に記録されているデジタ
ルデータを読み取る車載用コンパクトデイスクプ
レーヤの光ピツクアツプにおいて、光ビームをデ
イスク信号面にしぼる対物レンズの周辺部にヒー
タを配設すると共に、該ヒータに直列に所定温度
以下において動作するスイツチを接続したことを
特徴とする光ピツクアツプ。 In the optical pickup of a vehicle-mounted compact disc player, a light beam emitted from a laser diode is applied to the disc signal surface, and the reflected light is detected by a photodetector to read the digital data recorded on the disc signal surface. An optical pickup characterized in that a heater is disposed around an objective lens that focuses a beam onto a disk signal surface, and a switch that operates at a temperature below a predetermined temperature is connected in series with the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5398385U JPS61170122U (en) | 1985-04-11 | 1985-04-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5398385U JPS61170122U (en) | 1985-04-11 | 1985-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61170122U true JPS61170122U (en) | 1986-10-22 |
Family
ID=30575339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5398385U Pending JPS61170122U (en) | 1985-04-11 | 1985-04-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61170122U (en) |
-
1985
- 1985-04-11 JP JP5398385U patent/JPS61170122U/ja active Pending
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