JPH0449324U - - Google Patents
Info
- Publication number
- JPH0449324U JPH0449324U JP9091390U JP9091390U JPH0449324U JP H0449324 U JPH0449324 U JP H0449324U JP 9091390 U JP9091390 U JP 9091390U JP 9091390 U JP9091390 U JP 9091390U JP H0449324 U JPH0449324 U JP H0449324U
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- recording carrier
- information recording
- lens holder
- diameter
- 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 6
- 230000004907 flux Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Head (AREA)
Description
第１図は本考案の一実施例に係る光ピツクアツ
プの要部である対物レンズ保持ユニツトの断面図
、第２図ａは従来の光ピツクアツプの平面図、第
２図ｂは第２図ａの一部を切り欠いた側面図、第
３図ａは第２図ｂの要部である対物レンズ保持ユ
ニツトの断面図、第３図ｂは第３図ａの平面図、
第４図は第３図の対物レンズ保持ユニツトの代わ
りに取付けられるアパーチヤユニツトの断面図で
ある。
１……光デイスク（情報記録担体）、３……半
導体レーザ（光源）、１３……対物レンズ、２１
……対物レンズ保持ユニツト、３１……対物レン
ズホルダ、５３……絞り部、Ｌ……光束。
FIG. 1 is a sectional view of an objective lens holding unit which is a main part of an optical pickup according to an embodiment of the present invention, FIG. 2a is a plan view of a conventional optical pickup, and FIG. A side view with a part cut away, FIG. 3a is a sectional view of the objective lens holding unit which is the main part of FIG. 2b, FIG. 3b is a plan view of FIG. 3a,
FIG. 4 is a sectional view of an aperture unit installed in place of the objective lens holding unit of FIG. 3. 1... Optical disk (information recording carrier), 3... Semiconductor laser (light source), 13... Objective lens, 21
...Objective lens holding unit, 31...Objective lens holder, 53...Aperture section, L...Light flux.
Claims (1)
録された情報を読取るため、光源よりの光束を前
記情報記録担体に照射する対物レンズを有する対
物レンズホルダと、この対物レンズホルダを前記
情報記録担体のフオーカシング方向又はトラツキ
ング方向に対して移動自在に支持する対物レンズ
保持ユニツトとを備えた光ピツクアツプであつて
、 前記対物レンズホルダには前記対物レンズの光
軸と同軸上の光学的な絞り部を形成するとともに
、この絞り部の径を前記対物レンズに入射される
光束の径とほぼ等しく設定したことを特徴とする
光ピツクアツプ。[Claims for Utility Model Registration] An objective lens holder having an objective lens that irradiates the information recording carrier with a light beam from a light source in order to optically record information on the information recording carrier or read the recorded information; and an objective lens holding unit that supports the objective lens holder movably with respect to the focusing direction or the tracking direction of the information recording carrier, the objective lens holder having an optical axis of the objective lens and An optical pickup characterized in that a coaxial optical diaphragm is formed, and the diameter of the diaphragm is set to be approximately equal to the diameter of the light beam incident on the objective lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9091390U JPH0449324U (en) | 1990-08-29 | 1990-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9091390U JPH0449324U (en) | 1990-08-29 | 1990-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0449324U true JPH0449324U (en) | 1992-04-27 |
Family
ID=31826076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9091390U Pending JPH0449324U (en) | 1990-08-29 | 1990-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0449324U (en) |
-
1990
- 1990-08-29 JP JP9091390U patent/JPH0449324U/ja active Pending
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