JPH01165923U - - Google Patents
Info
- Publication number
- JPH01165923U JPH01165923U JP6175888U JP6175888U JPH01165923U JP H01165923 U JPH01165923 U JP H01165923U JP 6175888 U JP6175888 U JP 6175888U JP 6175888 U JP6175888 U JP 6175888U JP H01165923 U JPH01165923 U JP H01165923U
- Authority
- JP
- Japan
- Prior art keywords
- photodetector
- light
- parts
- information recording
- recording carrier
- 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 2
- 238000010586 diagram Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Description
第１図は本考案の一実施例の概略構成図、第２
図は同実施例における光検出器、第３図は同実施
例における光検出部での収束像を示す説明図、第
４図は同実施例における信号取り出し回路の一例
を示す回路図、第５図は円錐形レンズの他の例を
示す図、第６図は従来の光学的情報読み取り装置
の概略構成図、第７図は従来のフオーカス誤差信
号を取り出す回路の構成を示す回路図、第８図は
フーコ方式の説明図、第９図は従来のトラツキン
グ誤差信号および情報信号を取り出す回路構成を
示す回路図である。
１……レーザ光源、９……無偏光ビームスプリ
ツタ、１２，１３……光検出器、２１……円錐形
レンズ、２２……光検出器。
Figure 1 is a schematic diagram of an embodiment of the present invention;
The figure shows a photodetector in the same embodiment, FIG. 6 is a schematic configuration diagram of a conventional optical information reading device, FIG. 7 is a circuit diagram illustrating the configuration of a conventional focus error signal extraction circuit, and FIG. 8 is a diagram showing another example of a conical lens. 9 is an explanatory diagram of the Foucault system, and FIG. 9 is a circuit diagram showing a conventional circuit configuration for extracting a tracking error signal and an information signal. DESCRIPTION OF SYMBOLS 1... Laser light source, 9... Non-polarizing beam splitter, 12, 13... Photodetector, 21... Conical lens, 22... Photodetector.
Claims (1)
トを形成する光照射手段と、前記情報記録担体か
らの反射光を光検出器に導いてリング状の収束像
を形成する円錐形レンズとを有し、上記光検出器
を同心円状に２分割しかつ径方向に４分割したこ
とを特徴とする光学的情報読み取り装置。 It has a light irradiation means that focuses a light beam to form a light spot on the information recording carrier, and a conical lens that guides the reflected light from the information recording carrier to a photodetector to form a ring-shaped convergent image. An optical information reading device characterized in that the photodetector is divided concentrically into two parts and radially into four parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6175888U JPH01165923U (en) | 1988-05-11 | 1988-05-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6175888U JPH01165923U (en) | 1988-05-11 | 1988-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01165923U true JPH01165923U (en) | 1989-11-21 |
Family
ID=31287406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6175888U Pending JPH01165923U (en) | 1988-05-11 | 1988-05-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01165923U (en) |
-
1988
- 1988-05-11 JP JP6175888U patent/JPH01165923U/ja active Pending
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