JPS63191421U - - Google Patents
Info
- Publication number
- JPS63191421U JPS63191421U JP7944187U JP7944187U JPS63191421U JP S63191421 U JPS63191421 U JP S63191421U JP 7944187 U JP7944187 U JP 7944187U JP 7944187 U JP7944187 U JP 7944187U JP S63191421 U JPS63191421 U JP S63191421U
- Authority
- JP
- Japan
- Prior art keywords
- objective lens
- light source
- hologram element
- laser light
- pickup device
- 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 7
- 238000010586 diagram Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Optical Head (AREA)
- Holo Graphy (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案による光ピツクアツプ装置の一
実施例における強度分布と対物レンズとの関係を
示す略線図、第２図は光ピツクアツプ装置の光学
素子の配置を示す斜視図、第３図は従来の光ピツ
クアツプ装置における強度分布と対物レンズとの
関係を示す略線図、第４図は半導体レーザの発光
パターンを示す略線図である。
１……レーザダイオード、２……ホログラム素
子、３……対物レンズ、４……受光素子。
FIG. 1 is a schematic diagram showing the relationship between the intensity distribution and the objective lens in an embodiment of the optical pickup device according to the present invention, FIG. 2 is a perspective view showing the arrangement of optical elements of the optical pickup device, and FIG. FIG. 4 is a schematic diagram showing the relationship between the intensity distribution and the objective lens in a conventional optical pickup device. FIG. 4 is a schematic diagram showing the light emission pattern of a semiconductor laser. 1... Laser diode, 2... Hologram element, 3... Objective lens, 4... Light receiving element.
Claims (1)
ラム素子および対物レンズを順次介して光学式記
録媒体に照射し、その戻り光線を上記対物レンズ
を介して上記ホログラム素子に与え、当該ホログ
ラム素子によつて回折して受光素子に導くように
した光ピツクアツプ装置において、 上記レーザ光源から射出されたレーザ光線の発
散角が最も広い方向が、上記対物レンズのトラツ
キング時移動方向に沿うように上記レーザ光源を
設けたことを特徴とする光ピツクアツプ装置。[Claims for Utility Model Registration] A laser beam emitted from a laser light source is irradiated onto an optical recording medium through a hologram element and an objective lens sequentially, and the return beam is applied to the hologram element through the objective lens, In the optical pickup device which is configured to diffract the hologram element and guide it to the light receiving element, the direction in which the laser beam emitted from the laser light source has the widest angle of divergence is along the direction of movement of the objective lens during tracking. An optical pickup device characterized in that the laser light source described above is provided in the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7944187U JPS63191421U (en) | 1987-05-26 | 1987-05-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7944187U JPS63191421U (en) | 1987-05-26 | 1987-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63191421U true JPS63191421U (en) | 1988-12-09 |
Family
ID=30929303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7944187U Pending JPS63191421U (en) | 1987-05-26 | 1987-05-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63191421U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6297141A (en) * | 1985-10-17 | 1987-05-06 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Optical scanner |
-
1987
- 1987-05-26 JP JP7944187U patent/JPS63191421U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6297141A (en) * | 1985-10-17 | 1987-05-06 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | Optical scanner |