JPH01116913U - - Google Patents
Info
- Publication number
- JPH01116913U JPH01116913U JP1237188U JP1237188U JPH01116913U JP H01116913 U JPH01116913 U JP H01116913U JP 1237188 U JP1237188 U JP 1237188U JP 1237188 U JP1237188 U JP 1237188U JP H01116913 U JPH01116913 U JP H01116913U
- Authority
- JP
- Japan
- Prior art keywords
- optical
- light
- recording medium
- information recording
- optical 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims 1
- 230000010365 information processing Effects 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 1
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図はこの考案の第一の実施例を示す光ビー
ムの入射状態を示す説明図、第２図及び第３図は
２分割受光素子に光ビームが照射されている状態
を示す平面図、第４図は２分割受光素子上での受
光量の差分の変化量を示す波形図、第５図はこの
考案の第二の実施例の光ビームの入射状態を示す
説明図、第６図はその２分割受光素子に光ビーム
が照射されている状態を示す平面図、第７図は２
分割受光素子上での受光量の差分の変化量を示す
波形図、第８図は従来の非点収差法における光ビ
ームの入射状態を示す説明図、第９図はその４分
割受光素子を示す平面図、第１０図は従来のナイ
フエツジ法における光ビームの入射状態を示す説
明図、第１１図はその２分割受光素子を示す平面
図である。
４……光学部品、５……２分割受光素子、６…
…光学部品、７……２分割受光素子。
FIG. 1 is an explanatory diagram showing a state of incidence of a light beam showing a first embodiment of this invention, FIGS. 2 and 3 are plan views showing a state in which a light beam is irradiated onto a two-split light-receiving element, Fig. 4 is a waveform diagram showing the amount of change in the difference in the amount of light received on the two-split light receiving element, Fig. 5 is an explanatory diagram showing the incident state of the light beam in the second embodiment of this invention, and Fig. 6 is Figure 7 is a plan view showing the state in which the light beam is irradiated to the two-split photodetector.
A waveform diagram showing the amount of change in the difference in the amount of light received on the divided light-receiving element, Figure 8 is an explanatory diagram showing the incident state of the light beam in the conventional astigmatism method, and Figure 9 shows the four-divided light-receiving element. A plan view, FIG. 10 is an explanatory view showing the incident state of a light beam in the conventional knife edge method, and FIG. 11 is a plan view showing the two-split light receiving element. 4...Optical component, 5...2-split light receiving element, 6...
...Optical component, 7...2-split light receiving element.
Claims (1)
体に照射して情報の記録を行い、その光情報記録
媒体からの反射光を用いてトラツキングサーボや
フオーカスサーボのサーボ検出を行うと共に、光
磁気信号を検出して情報の再生を行う光ピツクア
ツプ装置において、前記光情報記録媒体により反
射された反射光の光路上にその反射光を集光する
光学部品を設け、その集光された光を検出する２
分割受光素子を設けたことを特徴とする光情報処
理装置。 Information is recorded by irradiating light emitted from a semiconductor laser onto an optical information recording medium, and the reflected light from the optical information recording medium is used for servo detection of tracking servo and focus servo. In an optical pickup device that detects a signal and reproduces information, an optical component is provided on the optical path of the reflected light reflected by the optical information recording medium to condense the reflected light, and the condensed light is detected. do 2
An optical information processing device characterized in that a divided light receiving element is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1237188U JPH01116913U (en) | 1988-02-01 | 1988-02-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1237188U JPH01116913U (en) | 1988-02-01 | 1988-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01116913U true JPH01116913U (en) | 1989-08-07 |
Family
ID=31221759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1237188U Pending JPH01116913U (en) | 1988-02-01 | 1988-02-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01116913U (en) |
-
1988
- 1988-02-01 JP JP1237188U patent/JPH01116913U/ja active Pending
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