JPH0216423U - - Google Patents
Info
- Publication number
- JPH0216423U JPH0216423U JP9630688U JP9630688U JPH0216423U JP H0216423 U JPH0216423 U JP H0216423U JP 9630688 U JP9630688 U JP 9630688U JP 9630688 U JP9630688 U JP 9630688U JP H0216423 U JPH0216423 U JP H0216423U
- Authority
- JP
- Japan
- Prior art keywords
- light
- light receiving
- receiving element
- receiving
- receiving 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Description
第１図は本考案に係る受光装置の一実施例の概
略斜視図、第２図ａ，ｂはそれぞれ第１図の受光
装置に用いられる第１，第２の受光素子の平面図
、第３図は第１図の受光装置を適用した光ピツク
アツプ装置の構成図、第４図ａ乃至ｃは第３図の
光ピツクアツプ装置における焦点検出の動作を説
明するための図、第５図は一般的な光ピツクアツ
プ装置の概略構成図、第６図は第５図の光ピツク
アツプ装置に用いられる従来の受光装置の平面図
、第７図ａ乃至ｃは第５図の光ピツクアツプ装置
における焦点検出の動作を説明するための図であ
る。
１……受光装置、２，３……受光素子、４……
反射部分、５ａ，５ｂ，５ｃ……受光部分、５１
……半導体レーザ、５２……カツプリングレンズ
、５３……偏光ビームスプリツタ、５４……λ／
４板、５５……対物レンズ、５６……光情報記憶
媒体、５７……受光レンズ、Ｖａ′，Ｖｂ′，Ｖ
ｃ′……出力信号。
FIG. 1 is a schematic perspective view of an embodiment of a light receiving device according to the present invention, FIGS. 2a and 2b are plan views of first and second light receiving elements used in the light receiving device of FIG. The figure is a block diagram of an optical pickup device to which the light receiving device of FIG. 1 is applied, FIGS. 6 is a plan view of a conventional light receiving device used in the optical pickup device shown in FIG. 5, and FIGS. 7a to 7c show focus detection operations in the optical pickup device shown in FIG. FIG. 1... Light receiving device, 2, 3... Light receiving element, 4...
Reflective portion, 5a, 5b, 5c... Light receiving portion, 51
... Semiconductor laser, 52 ... Coupling lens, 53 ... Polarizing beam splitter, 54 ... λ/
4 plates, 55...Objective lens, 56...Optical information storage medium, 57...Light receiving lens, Va', Vb', V
c'...Output signal.
Claims (1)
ている第１の受光素子と、受光部分が形成されて
いる第２の受光素子とを備え、前記第２の受光素
子はこの受光部分に前記第１の受光素子の反射部
分からの光が入射するように前記第１の受光素子
に対して配置されていることを特徴とする受光装
置。 The second light receiving element includes a first light receiving element having a light receiving part and a reflecting part formed in a predetermined arrangement, and a second light receiving element having a light receiving part formed therein. A light-receiving device characterized in that the light-receiving device is arranged relative to the first light-receiving element so that light from a reflective portion of the first light-receiving element is incident thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9630688U JPH0216423U (en) | 1988-07-20 | 1988-07-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9630688U JPH0216423U (en) | 1988-07-20 | 1988-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0216423U true JPH0216423U (en) | 1990-02-01 |
Family
ID=31321178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9630688U Pending JPH0216423U (en) | 1988-07-20 | 1988-07-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0216423U (en) |
-
1988
- 1988-07-20 JP JP9630688U patent/JPH0216423U/ja active Pending
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