JPS6190029U - - Google Patents
Info
- Publication number
- JPS6190029U JPS6190029U JP17556884U JP17556884U JPS6190029U JP S6190029 U JPS6190029 U JP S6190029U JP 17556884 U JP17556884 U JP 17556884U JP 17556884 U JP17556884 U JP 17556884U JP S6190029 U JPS6190029 U JP S6190029U
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- lens
- grating
- light beam
- information
- 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 8
- 230000010365 information processing Effects 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 239000012780 transparent material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Optical Head (AREA)
- Lens Barrels (AREA)
Description
第１図はこの考案に係る光学的情報処理装置を
示す構成図、第２図及び第３図はこの考案の要部
を示す断面図、第４図はこの考案におけるグレー
テイングレンズのグレーテイング面での光の屈折
の様子を示す説明図、第５図は従来の光学的情報
処理装置を示す構成図、第６図は従来におけるグ
レーテイングレンズが入射光側（光デイスクと反
対側）にあるときのグレーテイング面での光の屈
折の様子を示す断面図、第７図は従来におけるグ
レーテイングレンズが光デイスクと対向する側に
あるときのグレーテイング面での光の屈折の様子
を示す断面図である。
９…光源、１０…ビームスプリツタ、１１…コ
リメータレンズ、１２…グレーテイングレンズ（
対物レンズ）、１３…保護層、１４…光デイスク
（記録媒体）、１５…検出レンズ、１６…光検出
器。
Fig. 1 is a configuration diagram showing an optical information processing device according to this invention, Figs. 2 and 3 are sectional views showing main parts of this invention, and Fig. 4 is a grating surface of a grating lens in this invention. Figure 5 is a configuration diagram showing a conventional optical information processing device. Figure 6 is a conventional grating lens on the incident light side (opposite side from the optical disk). Figure 7 is a cross-sectional view showing how light is refracted at the grating surface when the conventional grating lens is on the side facing the optical disk. It is a diagram. 9...Light source, 10...Beam splitter, 11...Collimator lens, 12...Grating lens (
objective lens), 13...protective layer, 14...optical disk (recording medium), 15...detection lens, 16...photodetector.
Claims (1)
る記録媒体に、情報再生及び又は記録用の光ビー
ムを送出する光源と、この光源からの光ビームを
上記記録媒体の情報記録面に収束させるためのコ
リメータレンズ及び対物レンズを含む光学系と、
上記情報記録面から得られた情報を含む光ビーム
を検出する光検出器とを少なくとも備え、上記対
物レンズとして上記記録媒体に対向する面に、断
面が鋸歯状をなす同心円状の不等間隔回折格子パ
ターンが形成されたグレーテイングレンズを用い
る光学的情報処理装置において、 上記グレーテイングレンズをその回折格子パタ
ーンが、記録媒体と対向するように配設し、更に
記録媒体と対向する面に、グレーテイングレンズ
を構成する物質の屈折率よりも小さな屈折率を持
つ透明物質からなる保護層を、上記記録媒体側の
面が平らになるように被覆したことを特徴とする
光学的情報処理装置。[Claims for Utility Model Registration] A light source that transmits a light beam for information reproduction and/or recording to a recording medium on which information read by light beam scanning is recorded, and a light beam from this light source that transmits information on the recording medium. an optical system including a collimator lens and an objective lens for converging on the recording surface;
at least a photodetector for detecting a light beam containing information obtained from the information recording surface, and the objective lens is a concentric unequal-spaced diffraction beam having a sawtooth cross section on the surface facing the recording medium. In an optical information processing device using a grating lens on which a grating pattern is formed, the grating lens is disposed so that its diffraction grating pattern faces a recording medium, and further a grating is provided on the surface facing the recording medium. 1. An optical information processing device characterized in that a protective layer made of a transparent material having a refractive index smaller than that of a material constituting the lens is coated so that the surface facing the recording medium is flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17556884U JPS6190029U (en) | 1984-11-19 | 1984-11-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17556884U JPS6190029U (en) | 1984-11-19 | 1984-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6190029U true JPS6190029U (en) | 1986-06-11 |
Family
ID=30733169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17556884U Pending JPS6190029U (en) | 1984-11-19 | 1984-11-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6190029U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH021109A (en) * | 1987-10-13 | 1990-01-05 | Theodore R Whitney | System and method of high resolution image focusing |
-
1984
- 1984-11-19 JP JP17556884U patent/JPS6190029U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH021109A (en) * | 1987-10-13 | 1990-01-05 | Theodore R Whitney | System and method of high resolution image focusing |
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