JPH01113825U - - Google Patents
Info
- Publication number
- JPH01113825U JPH01113825U JP735488U JP735488U JPH01113825U JP H01113825 U JPH01113825 U JP H01113825U JP 735488 U JP735488 U JP 735488U JP 735488 U JP735488 U JP 735488U JP H01113825 U JPH01113825 U JP H01113825U
- Authority
- JP
- Japan
- Prior art keywords
- light
- recording medium
- condensing lens
- pickup device
- optical pickup
- 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 5
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案による光ピツクアツプ装置の一
実施例を示す概略構成図、第２図ａ，ｂは各々同
実施例を説明するための模式図、第３図ａ〜ｃは
各々同実施例の動作例を説明するための側面図、
第４図ａ〜ｃは各々同実施例の動作例を説明する
ための模式図、第５図は従来の光ピツクアツプ装
置の一例を示す概略構成図、第６図ａ〜ｃは各々
第５図に示す光ピツクアツプ装置を説明するため
の側面図である。
２７……記録媒体、２８……集光レンズ、３２
……分割部（ミラー）、３３，３４……受光器（
受光素子）。
FIG. 1 is a schematic configuration diagram showing an embodiment of an optical pickup device according to the present invention, FIGS. 2 a and b are schematic diagrams for explaining the same embodiment, and FIGS. 3 a to c are each the same embodiment. A side view to explain an example of operation,
4a to 4c are schematic diagrams for explaining an example of the operation of the same embodiment, FIG. 5 is a schematic configuration diagram showing an example of a conventional optical pickup device, and FIGS. FIG. 2 is a side view for explaining the optical pickup device shown in FIG. 27...Recording medium, 28...Condensing lens, 32
...Divided part (mirror), 33, 34... Light receiver (
Light receiving element).
Claims (1)
上に情報を記録したり、記録されている情報を読
み取つたりする光ピツクアツプ装置において、記
録媒体からの光を収束させる集光レンズと、この
集光レンズを通過した光を複数に分割する分割部
と、この分割部によつて分割された各光を各々受
光する複数の受光部と、これら各受光器の出力に
基づいてフオーカス状態を検出する検出部とを備
えたことを特徴とする光ピツクアツプ装置。 In an optical pickup device that irradiates a light beam onto a recording medium to record information on the recording medium or read recorded information, a condensing lens that converges the light from the recording medium and a condensing lens that converges the light from the recording medium and A splitting section that splits the light that has passed through the condensing lens into multiple parts, multiple light receiving sections that each receive each light split by this splitting section, and detecting the focus state based on the output of each of these light receivers. What is claimed is: 1. An optical pickup device comprising: a detection section for detecting
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP735488U JPH01113825U (en) | 1988-01-22 | 1988-01-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP735488U JPH01113825U (en) | 1988-01-22 | 1988-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01113825U true JPH01113825U (en) | 1989-07-31 |
Family
ID=31212296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP735488U Pending JPH01113825U (en) | 1988-01-22 | 1988-01-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01113825U (en) |
-
1988
- 1988-01-22 JP JP735488U patent/JPH01113825U/ja active Pending
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