JPH0178319U - - Google Patents
Info
- Publication number
- JPH0178319U JPH0178319U JP1987175254U JP17525487U JPH0178319U JP H0178319 U JPH0178319 U JP H0178319U JP 1987175254 U JP1987175254 U JP 1987175254U JP 17525487 U JP17525487 U JP 17525487U JP H0178319 U JPH0178319 U JP H0178319U
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- pickup device
- information recording
- optical pickup
- information
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Optical Head (AREA)
Description
第１図は、本考案の一実施例の概略側断面図、
第２図ａ及び第２図ｂは、それぞれ実施例の収束
位置での光束の断面形状及び受光素子のチツプ形
状を示す図、第３図ａ及び第３図ｂは、それぞれ
他の実施例の収束位置での光束の断面形状及び受
光素子のチツプ形状を示す図、第４図は、従来例
の概略側断面図である。
１ａ，１ｂ……半導体レーザー光源、３ａ，３
ｂ……ビームスプリツター、５……プリズム、６
……集光レンズ、７……光検出器、７ａ，７ｂ…
…受光素子、１０……デイスク状記録媒体、１２
ａ，１２ｂ……反射光、１２ａ′，１２ｂ′……
反射光の収束位置でのスポツト。
FIG. 1 is a schematic side sectional view of an embodiment of the present invention;
Figures 2a and 2b are diagrams showing the cross-sectional shape of the light beam and the chip shape of the light receiving element at the convergence position of the embodiment, respectively, and Figures 3a and 3b are diagrams of the other embodiments, respectively. FIG. 4, which is a diagram showing the cross-sectional shape of the light beam at the converging position and the chip shape of the light-receiving element, is a schematic side sectional view of the conventional example. 1a, 1b... semiconductor laser light source, 3a, 3
b... Beam splitter, 5... Prism, 6
...Condenser lens, 7...Photodetector, 7a, 7b...
... Light receiving element, 10 ... Disc-shaped recording medium, 12
a, 12b...Reflected light, 12a', 12b'...
A spot where reflected light converges.
Claims (1)
を照射し、同時に複数の異なる情報の記録再生を
行うように構成された光ピツクアツプ装置におい
て、情報記録媒体から反射された信号光を同一の
光路を経て光検出器に導く集光手段として、少な
くとも片面が円弧状凸形状となつた断面形状を有
する集光レンズを用いたことを特徴とする光ピツ
クアツプ装置。 In an optical pickup device that is configured to irradiate an information recording medium with multiple light beams of different wavelengths and simultaneously record and reproduce multiple different pieces of information, the signal light reflected from the information recording medium is routed along the same optical path. An optical pickup device characterized in that a condensing lens having a cross-sectional shape with at least one side having an arcuate convex shape is used as a condensing means for guiding light to a photodetector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17525487U JPH073463Y2 (en) | 1987-11-16 | 1987-11-16 | Optical pickup device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17525487U JPH073463Y2 (en) | 1987-11-16 | 1987-11-16 | Optical pickup device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0178319U true JPH0178319U (en) | 1989-05-26 |
| JPH073463Y2 JPH073463Y2 (en) | 1995-01-30 |
Family
ID=31467060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17525487U Expired - Lifetime JPH073463Y2 (en) | 1987-11-16 | 1987-11-16 | Optical pickup device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073463Y2 (en) |
-
1987
- 1987-11-16 JP JP17525487U patent/JPH073463Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH073463Y2 (en) | 1995-01-30 |