JPH0296619U - - Google Patents
Info
- Publication number
- JPH0296619U JPH0296619U JP474089U JP474089U JPH0296619U JP H0296619 U JPH0296619 U JP H0296619U JP 474089 U JP474089 U JP 474089U JP 474089 U JP474089 U JP 474089U JP H0296619 U JPH0296619 U JP H0296619U
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- pickup device
- optical pickup
- optical
- recording medium
- 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 4
- 239000004065 semiconductor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は、本考案の１実施例を説明するための
図、第２図乃至第４図は、考案の解決課題を説明
するための図である。
１……半導体レーザー、２……カツプリングレ
ンズ、３……偏光ビームスプリツター、４……1/
4波長板、５……対物レンズ、６……光情報記録
媒体、７……トラツクエラー信号検出用受光素子
、８……アパーチユアを有する遮光部材。
FIG. 1 is a diagram for explaining one embodiment of the present invention, and FIGS. 2 to 4 are diagrams for explaining problems to be solved by the invention. 1... Semiconductor laser, 2... Coupling lens, 3... Polarizing beam splitter, 4... 1/
4 wavelength plate, 5... objective lens, 6... optical information recording medium, 7... light receiving element for track error signal detection, 8... light shielding member having an aperture.
Claims (1)
光情報記録媒体上にスポツト状に結像させ、情報
の記録及び／又は再生を行う光ピツクアツプ装置
であつて、 対物レンズとトラツクエラー信号検出用受光素
子との間に、対物レンズの有効径より小さいアパ
ーチユアを有する遮光部材を配備したことを特徴
とする光ピツクアツプ装置。[Scope of Claim for Utility Model Registration] An optical pickup device that records and/or reproduces information by forming a spot-like image of a beam from a semiconductor laser on an optical information recording medium using an objective lens, which comprises: an objective lens and a track; An optical pickup device characterized in that a light shielding member having an aperture smaller than the effective diameter of an objective lens is disposed between a light receiving element for detecting an error signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP474089U JPH0296619U (en) | 1989-01-19 | 1989-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP474089U JPH0296619U (en) | 1989-01-19 | 1989-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0296619U true JPH0296619U (en) | 1990-08-01 |
Family
ID=31207520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP474089U Pending JPH0296619U (en) | 1989-01-19 | 1989-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0296619U (en) |
-
1989
- 1989-01-19 JP JP474089U patent/JPH0296619U/ja active Pending
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