JPH0193622U - - Google Patents
Info
- Publication number
- JPH0193622U JPH0193622U JP19025987U JP19025987U JPH0193622U JP H0193622 U JPH0193622 U JP H0193622U JP 19025987 U JP19025987 U JP 19025987U JP 19025987 U JP19025987 U JP 19025987U JP H0193622 U JPH0193622 U JP H0193622U
- Authority
- JP
- Japan
- Prior art keywords
- light
- signal light
- receiving element
- recording medium
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 2
- 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、更に他
の実施例の概略側断面図、第5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、14……ホログ
ラム素子。
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 is a schematic side sectional view of still another embodiment, and FIG. 5 is a schematic side sectional view of a 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'...
Spot at the convergence position of reflected light, 14... Hologram element.
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、波長
によつて光軸方向の収束位置が異なる集光手段を
用いると共に、特定の波長の信号光の収束点に、
収束した信号光に対応する受光素子チツプと収束
しない信号光に対応する受光素子チツプとを備え
た分割型光検出器を配置し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. As a condensing means for guiding the light to the photodetector, a condensing means whose convergence position in the optical axis direction differs depending on the wavelength is used, and at the convergence point of the signal light of a specific wavelength,
An optical pickup device characterized in that a split-type photodetector is arranged, which includes a light-receiving element chip corresponding to converged signal light and a light-receiving element chip corresponding to non-convergent signal light.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987190259U JPH0810853Y2 (en) | 1987-12-14 | 1987-12-14 | Optical pickup device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987190259U JPH0810853Y2 (en) | 1987-12-14 | 1987-12-14 | Optical pickup device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0193622U true JPH0193622U (en) | 1989-06-20 |
JPH0810853Y2 JPH0810853Y2 (en) | 1996-03-29 |
Family
ID=31481247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987190259U Expired - Lifetime JPH0810853Y2 (en) | 1987-12-14 | 1987-12-14 | Optical pickup device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0810853Y2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6452123U (en) * | 1987-09-24 | 1989-03-30 |
-
1987
- 1987-12-14 JP JP1987190259U patent/JPH0810853Y2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6452123U (en) * | 1987-09-24 | 1989-03-30 |
Also Published As
Publication number | Publication date |
---|---|
JPH0810853Y2 (en) | 1996-03-29 |
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