JPH0337610U - - Google Patents
Info
- Publication number
- JPH0337610U JPH0337610U JP8866389U JP8866389U JPH0337610U JP H0337610 U JPH0337610 U JP H0337610U JP 8866389 U JP8866389 U JP 8866389U JP 8866389 U JP8866389 U JP 8866389U JP H0337610 U JPH0337610 U JP H0337610U
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- inclination
- position detection
- detection element
- light
- 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 11
- 238000001514 detection method Methods 0.000 claims description 7
- 230000010365 information processing Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
- Manufacturing Optical Record Carriers (AREA)
Description
第１図は、対物レンズの倒れ測定装置の１実施
例を説明するための図、第２図は、従来技術を説
明するための図、第３図は、光学式情報処理装置
の１実施例を説明するための図である。
１……光ヘツド、２……対物レンズ、２Ａ……
鏡面、３……1/4波長板、４……偏光ビームスプ
リツター、６……集光レンズ、７……光位置検出
素子。
FIG. 1 is a diagram for explaining an embodiment of an objective lens tilt measurement device, FIG. 2 is a diagram for explaining a conventional technique, and FIG. 3 is an embodiment of an optical information processing device. FIG. 1... Optical head, 2... Objective lens, 2A...
Mirror surface, 3... 1/4 wavelength plate, 4... Polarizing beam splitter, 6... Condensing lens, 7... Optical position detection element.
Claims (1)
倒れ振動または動的レンズ倒れを測定する装置で
あつて、 対物レンズと一体的に設けられた鏡面と、 略平行なレーザー光束を定方向から上記鏡面に
照射する光源と、 上記鏡面により反射されたレーザー光を受光す
る光位置検出素子と、 上記鏡面により反射されたレーザー光を上記光
位置検出素子上に集光させる集光レンズと、 この光位置検出素子からの出力に基づき、対物
レンズの倒れ量を演算する演算手段とを有し、 対物レンズの倒れ量測定の所望の仕様分解能が
上記位置検出素子の分解能で達成されるように、
光位置検出素子の配置を定めたことを特徴とする
光ヘツドにおける対物レンズの倒れ測定装置。 ２ 請求項１に於いて、光源が、光ヘツドによる
記録・再生もしくは原盤露光に用いられる光と異
なる波長のレーザー光を放射することを特徴とす
る光ヘツドにおける対物レンズの倒れ測定装置。 ３ 記録・再生もしくは原盤露光を行うための装
置であつて、請求項１の対物レンズの倒れ測定装
置と、この測定装置による測定結果に応じて記録
・再生もしくは原盤露光のための光束の対物レン
ズへの入射状態を補正する補正手段とを有し、記
録・再生もしくは原盤露光に用いられる光が対物
レンズの倒れ測定に用いる光と異なる波長である
ことを特徴とする光学式情報処理装置。[Claims for Utility Model Registration] 1. A device for measuring inclination vibration or dynamic lens inclination of an objective lens movably provided in an optical head, which is substantially parallel to a mirror surface provided integrally with the objective lens. a light source that irradiates the mirror surface with a laser beam from a fixed direction; a light position detection element that receives the laser light reflected by the mirror surface; and a light position detection element that focuses the laser light reflected by the mirror surface onto the light position detection element. and a calculation means for calculating the amount of inclination of the objective lens based on the output from the optical position detection element, and the desired specification resolution for measuring the amount of inclination of the objective lens is the resolution of the position detection element. As achieved in
1. A tilt measuring device for an objective lens in an optical head, characterized in that the arrangement of an optical position detection element is determined. 2. An apparatus for measuring inclination of an objective lens in an optical head according to claim 1, wherein the light source emits a laser beam having a wavelength different from that used for recording/reproducing by the optical head or for exposing a master disc. 3. A device for recording/reproducing or exposing a master disc, which includes the objective lens inclination measuring device according to claim 1, and an objective lens for producing a light beam for recording/reproducing or exposing the master disc according to the measurement result by this measuring device. 1. An optical information processing apparatus, comprising: a correction means for correcting an incident state of the optical information processing apparatus, and wherein light used for recording/reproduction or master disc exposure has a wavelength different from that of light used for measuring the inclination of an objective lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8866389U JPH0337610U (en) | 1989-05-17 | 1989-07-28 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5685589 | 1989-05-17 | ||
| JP8866389U JPH0337610U (en) | 1989-05-17 | 1989-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0337610U true JPH0337610U (en) | 1991-04-11 |
Family
ID=31718168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8866389U Pending JPH0337610U (en) | 1989-05-17 | 1989-07-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0337610U (en) |
-
1989
- 1989-07-28 JP JP8866389U patent/JPH0337610U/ja active Pending
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