JPS6384730U - - Google Patents
Info
- Publication number
- JPS6384730U JPS6384730U JP17885986U JP17885986U JPS6384730U JP S6384730 U JPS6384730 U JP S6384730U JP 17885986 U JP17885986 U JP 17885986U JP 17885986 U JP17885986 U JP 17885986U JP S6384730 U JPS6384730 U JP S6384730U
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- laser beam
- receiving element
- light receiving
- guided
- 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 13
- 239000004065 semiconductor Substances 0.000 claims description 5
- 230000010287 polarization Effects 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Optical Head (AREA)
Description
第１図は本考案に係る光デイスク装置の要部構
成を示す光学系図、第２図は第１図に示す半導体
レーザーの発振出力が段階的に減衰する状態を説
明するための図、第３図は第１図に示す電界効果
型光変調器に加える印加電圧とビームスプリツタ
の出射面から出射されるレーザービームの相対出
射強度との関係を示す特性図である。
１……半導体レーザー、４……偏光ビームスプ
リツタ、６……対物レンズ、７……光デイスク、
８……受光素子、１１……ビーム減衰手段、１１
ｆ……黒色反射防止膜。
FIG. 1 is an optical system diagram showing the main structure of the optical disk device according to the present invention, FIG. 2 is a diagram for explaining the state in which the oscillation output of the semiconductor laser shown in FIG. 1 is attenuated in stages, and FIG. The figure is a characteristic diagram showing the relationship between the applied voltage applied to the field-effect optical modulator shown in FIG. 1 and the relative output intensity of the laser beam emitted from the output surface of the beam splitter. 1... Semiconductor laser, 4... Polarizing beam splitter, 6... Objective lens, 7... Optical disk,
8... Light receiving element, 11... Beam attenuation means, 11
f...Black antireflection film.
Claims (1)
を偏光ビームスプリツタを介して対物レンズに導
きかつ該対物レンズによつて前記レーザービーム
を光デイスクに集中させて該光デイスクに情報の
書き込みを行なうと共に、前記光デイスクにより
反射された反射レーザービームを前記偏光ビーム
スプリツタにより受光素子の存在する方向に導い
て該受光素子に結像させ、前記光デイスクに記録
された情報の読み取りを行なう光デイスク装置に
おいて、 前記半導体レーザーと前記偏光ビームスプリツ
タとの間のレーザービームの出射光路途中に、前
記光デイスクに記録されている情報の読み取りを
行なうときに前記半導体レーザーから出射された
レーザービームの一部を前記偏光ビームスプリツ
タにより反射させて前記光デイスクに導かれるレ
ーザービームを減衰させるビーム減衰手段を設け
、前記偏光ビームスプリツタには該偏光ビームス
プリツタを前記光デイスクに向かつて通過する際
に反射された反射レーザービームが前記受光素子
に導かれて該受光素子の再生ノイズが増大するの
防止する迷光防止手段を設けたことを特徴とする
光デイスク装置。[Claims for Utility Model Registration] A laser beam emitted from a semiconductor laser is guided through a polarizing beam splitter to an objective lens, and the objective lens focuses the laser beam onto an optical disk to generate information on the optical disk. At the same time, the reflected laser beam reflected by the optical disk is guided by the polarizing beam splitter in the direction of the light receiving element to form an image on the light receiving element, and the information recorded on the optical disk is read. In an optical disk device that performs the above, the laser beam emitted from the semiconductor laser when reading information recorded on the optical disk is placed in the optical path of the laser beam between the semiconductor laser and the polarization beam splitter. The polarizing beam splitter is provided with a beam attenuating means for reflecting a part of the laser beam by the polarizing beam splitter to attenuate the laser beam guided to the optical disk, 1. An optical disk device comprising a stray light prevention means for preventing a reflected laser beam reflected when passing through the light receiving element from being guided to the light receiving element, thereby preventing reproduction noise of the light receiving element from increasing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17885986U JPS6384730U (en) | 1986-11-20 | 1986-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17885986U JPS6384730U (en) | 1986-11-20 | 1986-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6384730U true JPS6384730U (en) | 1988-06-03 |
Family
ID=31121386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17885986U Pending JPS6384730U (en) | 1986-11-20 | 1986-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6384730U (en) |
-
1986
- 1986-11-20 JP JP17885986U patent/JPS6384730U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS61111036U (en) | ||
| JPS6384730U (en) | ||
| JP2912560B2 (en) | Optical pickup | |
| JPS6384729U (en) | ||
| JPS62173650A (en) | Optical information reproducing device | |
| JPH03283112A (en) | Optical pickup device | |
| JPS57154658A (en) | Optical type information reproducing device | |
| JPS6374724U (en) | ||
| JPH0519853Y2 (en) | ||
| JP2616466B2 (en) | Optical head device | |
| JPS592243A (en) | Optical device | |
| JPS6148428U (en) | ||
| JPS6313418U (en) | ||
| JPS6128113U (en) | focus detection device | |
| JPS57200959A (en) | Write and read device of optical magnetic recording system | |
| JPS62117719U (en) | ||
| JPS6077021U (en) | Magneto-optical pickup device | |
| KR960015434A (en) | Optical pickup | |
| JPH01154527U (en) | ||
| KR950034123A (en) | Optical pickup head of magneto-optical disc playback system | |
| JPH02304756A (en) | Optical head | |
| JPS5912111U (en) | 1/4 wavelength plate | |
| JPS63205826A (en) | Optical reproducing device | |
| JPH02223027A (en) | Optical head device | |
| JPS5869821U (en) | Hologram Sukiyana |