JPS62195221U - - Google Patents
Info
- Publication number
- JPS62195221U JPS62195221U JP8225686U JP8225686U JPS62195221U JP S62195221 U JPS62195221 U JP S62195221U JP 8225686 U JP8225686 U JP 8225686U JP 8225686 U JP8225686 U JP 8225686U JP S62195221 U JPS62195221 U JP S62195221U
- Authority
- JP
- Japan
- Prior art keywords
- optical path
- astigmatism
- reflected light
- optical disk
- incident
- 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 13
- 201000009310 astigmatism Diseases 0.000 claims 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図ないし第４図ロは本考案の第１実施例を
示し、第１図はその光学系の構成を示す説明図、
第２図は曲面ミラーの斜視図、第３図は光検出器
及びその周辺の回路の構成図、第４図イ，ロは曲
面ミラーに関係する光路を示す説明図、第５図は
本考案の第２実施例の光学系の構成を示す説明図
、第６図は第２実施例の他の態様を示す部分説明
図、である。
１……光学デイスク、５……ビームスプリツタ
、９……対物レンズ、１１……曲面ミラー、１３
……光検出器。
1 to 4B show a first embodiment of the present invention, and FIG. 1 is an explanatory diagram showing the configuration of the optical system,
Figure 2 is a perspective view of the curved mirror, Figure 3 is a configuration diagram of the photodetector and its surrounding circuits, Figure 4 A and B are explanatory diagrams showing the optical path related to the curved mirror, and Figure 5 is the invention of the present invention. FIG. 6 is a partial explanatory diagram showing another aspect of the second embodiment. DESCRIPTION OF SYMBOLS 1... Optical disk, 5... Beam splitter, 9... Objective lens, 11... Curved mirror, 13
...Photodetector.
Claims (1)
、所定の入射光路を経て照光する発光手段と、 該入射光路に配設され、上記発光手段から入射
する光を上記光学デイスク上の所定の領域に集光
すると共に、該光学デイスクからの反射光を入射
方向へ戻す対物レンズと、 上記入射光路に配設され、対物レンズを経て戻
つてくる上記反射光の少なくとも一部を、上記入
射光路とは異なる方向へ導く反射光路変更手段と
、 上記反射光路変更手段にて導かれた反射光に非
点収差を生じさせる非点収差発生手段と、 該非点収差発生手段を経た反射光の非点収差を
検出し、フオーカスエラー信号を出力する非点収
差検出手段と、 を備え、上記光学デイスクに記録されている情報
を読み取る光学デイスク読取装置において、 上記非点収差発生手段が、曲面ミラーよりなる
ことを特徴とする光学デイスク読取装置。[Claims for Utility Model Registration] Light emitting means for illuminating a reflective optical disk on which information is recorded through a predetermined incident optical path; an objective lens that focuses the light onto a predetermined area on the optical disk and returns the reflected light from the optical disk to the incident direction; and at least one of the reflected light that is disposed in the incident optical path and returns through the objective lens. a reflective optical path changing means for guiding the light to a direction different from the incident optical path; an astigmatism generating means for causing astigmatism in the reflected light guided by the reflective optical path changing means; and the astigmatism generating means. an astigmatism detection means for detecting astigmatism of reflected light that has passed through the optical disk and outputting a focus error signal; An optical disc reading device characterized in that the means comprises a curved mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8225686U JPS62195221U (en) | 1986-05-29 | 1986-05-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8225686U JPS62195221U (en) | 1986-05-29 | 1986-05-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62195221U true JPS62195221U (en) | 1987-12-11 |
Family
ID=30934744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8225686U Pending JPS62195221U (en) | 1986-05-29 | 1986-05-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62195221U (en) |
-
1986
- 1986-05-29 JP JP8225686U patent/JPS62195221U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5855567B2 (en) | The best way to do it | |
| JPS6358321U (en) | ||
| KR950004127A (en) | Optical pickup device for magneto-optical disk | |
| JPS61111036U (en) | ||
| US4633454A (en) | Optical information pickup apparatus | |
| JPS62195221U (en) | ||
| JPH07192281A (en) | Optical pickup device | |
| JPH08221789A (en) | Optical information processor | |
| JP2763174B2 (en) | Optical pickup device | |
| JPS6355217U (en) | ||
| KR0144874B1 (en) | Optical pick-up device | |
| KR960005480A (en) | Focus error detection device | |
| JPH03268239A (en) | Optical disk reader | |
| JPS6222727U (en) | ||
| JPS61140430U (en) | ||
| JPH042317U (en) | ||
| JPH0226129U (en) | ||
| JPS61178522U (en) | ||
| JPH01165923U (en) | ||
| JPH04372729A (en) | Integrated optical element and integrated optical pickup | |
| JPH0332726U (en) | ||
| JPS61140429U (en) | ||
| JPH01154527U (en) | ||
| JPS61182926U (en) | ||
| JPS63113221U (en) |