JPS61195530U - - Google Patents
Info
- Publication number
- JPS61195530U JPS61195530U JP8029185U JP8029185U JPS61195530U JP S61195530 U JPS61195530 U JP S61195530U JP 8029185 U JP8029185 U JP 8029185U JP 8029185 U JP8029185 U JP 8029185U JP S61195530 U JPS61195530 U JP S61195530U
- Authority
- JP
- Japan
- Prior art keywords
- light
- disk
- incident
- diffraction means
- diffracted
- 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 5
- 230000001678 irradiating effect Effects 0.000 claims 1
- 230000010287 polarization Effects 0.000 claims 1
Landscapes
- Mounting And Adjusting Of Optical Elements (AREA)
- Optical Head (AREA)
Description
第1図は本考案の光学式ピツクアツプ装置の模
式的平面図、第2図は従来の光学式ピツクアツプ
装置の模式的平面図である。
1……光源、2……位相型回折板、3……対物
レンズ、4……デイスク、5……受光素子、11
……偏光板、12……波長板。
FIG. 1 is a schematic plan view of an optical pickup device of the present invention, and FIG. 2 is a schematic plan view of a conventional optical pickup device. DESCRIPTION OF SYMBOLS 1... Light source, 2... Phase type diffraction plate, 3... Objective lens, 4... Disc, 5... Light receiving element, 11
...Polarizing plate, 12...Wave plate.
Claims (1)
される入射光を該デイスク上に収束する対物レン
ズと、該デイスクにて反射された反射光の少なく
とも一部を受光する受光素子と、該入射光と反射
光の光路中に配置され、入射される光を少なくと
も2つの回折光に回折する回折手段とを有する光
学式ピツクアツプ装置において、 該光学からの該入射光を該回折手段により回折
し、一方の回折光を該対物レンズを介して該デイ
スクに収束、照射し、該デイスクからの該反射光
を該対物レンズを介して該回折手段に入射させ、
該回折手段により回折された一方の回切光を該受
光素子に入射させるようにするとともに、該光源
と該回折手段との間に、偏向板と波長板とを配置
し、該デイスクからの該反射光が該光源に戻るの
を阻止することを特徴とする光学式ピツクアツプ
装置。[Claims for Utility Model Registration] A light source, an objective lens that converges incident light emitted from the light source and incident on the disk onto the disk, and receives at least a portion of the reflected light reflected by the disk. an optical pickup device having a light-receiving element for detecting the incident light, and a diffraction means disposed in the optical path of the incident light and the reflected light for diffracting the incident light into at least two diffracted lights, diffracted by the diffraction means, converging and irradiating one diffracted light onto the disk via the objective lens, and causing the reflected light from the disk to enter the diffraction means via the objective lens;
One of the split beams diffracted by the diffraction means is made to enter the light receiving element, and a polarization plate and a wavelength plate are disposed between the light source and the diffraction means, and the light from the disk is made incident on the light receiving element. An optical pickup device characterized in that reflected light is prevented from returning to the light source.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8029185U JPS61195530U (en) | 1985-05-29 | 1985-05-29 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8029185U JPS61195530U (en) | 1985-05-29 | 1985-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61195530U true JPS61195530U (en) | 1986-12-05 |
Family
ID=30626003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8029185U Pending JPS61195530U (en) | 1985-05-29 | 1985-05-29 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61195530U (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5741610A (en) * | 1980-08-26 | 1982-03-08 | Sharp Corp | Optical device |
JPS59119548A (en) * | 1982-12-25 | 1984-07-10 | Pioneer Electronic Corp | Optical pickup device |
-
1985
- 1985-05-29 JP JP8029185U patent/JPS61195530U/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5741610A (en) * | 1980-08-26 | 1982-03-08 | Sharp Corp | Optical device |
JPS59119548A (en) * | 1982-12-25 | 1984-07-10 | Pioneer Electronic Corp | Optical pickup device |