JPS63191423U - - Google Patents
Info
- Publication number
- JPS63191423U JPS63191423U JP7943987U JP7943987U JPS63191423U JP S63191423 U JPS63191423 U JP S63191423U JP 7943987 U JP7943987 U JP 7943987U JP 7943987 U JP7943987 U JP 7943987U JP S63191423 U JPS63191423 U JP S63191423U
- Authority
- JP
- Japan
- Prior art keywords
- pickup device
- optical pickup
- optotube
- objective lens
- cylindrical shape
- 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
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Holo Graphy (AREA)
- Optical Head (AREA)
Description
第１図は本考案による光ピツクアツプ装置のオ
プトチユーブの一実施例を示す縦断面図、第２図
は光ピツクアツプ装置の光学素子の配置を示す配
置図、第３図は光ピツクアツプ装置の一部を切り
欠いて示す斜視図である。
１……レーザダイオード、２……ホログラム素
子、３……対物レンズ、１０……オプトチユーブ
、１１……中心孔、１２……貫通孔、１４……絞
り部材。
FIG. 1 is a longitudinal sectional view showing an embodiment of an optical tube of an optical pickup device according to the present invention, FIG. 2 is a layout diagram showing the arrangement of optical elements of the optical pickup device, and FIG. 3 is a part of the optical pickup device. FIG. 2 is a cutaway perspective view. DESCRIPTION OF SYMBOLS 1...Laser diode, 2...Hologram element, 3...Objective lens, 10...Optotube, 11...Center hole, 12...Through hole, 14...Aperture member.
Claims (1)
と共に、他端部に対物レンズに対向するようにホ
ログラム素子を備え、かつ、側面に上記ホログラ
ム素子によつて回折された戻り光線を通過させる
貫通孔が穿設されている光ピツクアツプ装置のオ
プトチユーブにおいて、 中心孔の内周面に、反射されることなく上記対
物レンズに直接向かう上記レーザ光源からの射出
光のみを通過させる絞り部材を設けたことを特徴
とする光ピツクアツプ装置のオプトチユーブ。[Claims for Utility Model Registration] It has a cylindrical shape, is equipped with a laser light source at one end, is equipped with a hologram element at the other end so as to face an objective lens, and has a cylindrical shape, and is equipped with a hologram element on the side surface to cause diffraction In an optotube of an optical pickup device, which is provided with a through hole through which the returned light beam passes through, only the emitted light from the laser light source is directed directly to the objective lens without being reflected on the inner peripheral surface of the center hole. 1. An optotube for an optical pickup device, characterized in that it is provided with an aperture member that allows the light to pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7943987U JPS63191423U (en) | 1987-05-26 | 1987-05-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7943987U JPS63191423U (en) | 1987-05-26 | 1987-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63191423U true JPS63191423U (en) | 1988-12-09 |
Family
ID=30929298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7943987U Pending JPS63191423U (en) | 1987-05-26 | 1987-05-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63191423U (en) |
-
1987
- 1987-05-26 JP JP7943987U patent/JPS63191423U/ja active Pending