JPS63118714U - - Google Patents
Info
- Publication number
- JPS63118714U JPS63118714U JP913587U JP913587U JPS63118714U JP S63118714 U JPS63118714 U JP S63118714U JP 913587 U JP913587 U JP 913587U JP 913587 U JP913587 U JP 913587U JP S63118714 U JPS63118714 U JP S63118714U
- Authority
- JP
- Japan
- Prior art keywords
- optical
- semiconductor laser
- detection
- optical device
- pair
- 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 16
- 239000004065 semiconductor Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 1
Landscapes
- Optical Head (AREA)
Description
第1図は本考案の実施例による光学式ピツクア
ツプの光学装置を示す素子の配置図、第2図はビ
ーム補正のためのシリンドリカルレンズを示す平
面図、第3図は第2図の側面図、第4図は本考案
の第二実施例を示す第2図に相当する平面図、第
5図は従来の光学式ピツクアツプの光学装置を示
す素子の配置図、第6図は半導体レーザの構造を
示す透視斜視図、第7図は半導体レーザのビーム
の放射特性を示す斜視図、第8図〜第10図は半
導体レーザの出力ビームを補正する従来の光学系
を示す側面図である。
D……光デイスク、1……半導体レーザ、2…
…偏光ビームスプリツタ、3……コリメートレン
ズ、5……対物レンズ、6……受光素子、20,
20a,20b……シリンドリカルレンズ、21
,21a,22,22a……シリンドリカル面。
FIG. 1 is a layout diagram of elements showing an optical device of an optical pickup according to an embodiment of the present invention, FIG. 2 is a plan view showing a cylindrical lens for beam correction, and FIG. 3 is a side view of FIG. 2. FIG. 4 is a plan view corresponding to FIG. 2 showing a second embodiment of the present invention, FIG. 5 is a layout diagram of elements showing a conventional optical pickup optical device, and FIG. 6 is a diagram showing the structure of a semiconductor laser. 7 is a perspective view showing radiation characteristics of a semiconductor laser beam, and FIGS. 8 to 10 are side views showing a conventional optical system for correcting the output beam of a semiconductor laser. D... Optical disk, 1... Semiconductor laser, 2...
... Polarizing beam splitter, 3... Collimating lens, 5... Objective lens, 6... Light receiving element, 20,
20a, 20b...Cylindrical lens, 21
, 21a, 22, 22a... Cylindrical surface.
Claims (1)
れる検知ビームを集光して光デイスクの記録面に
検知スポツトを形成する対物レンズ、ならびに光
デイスクからの反射ビームを検知する受光素子と
が装備されている光学式ピツクアツプの光学装置
において、半導体レーザからの出力される検知ビ
ームの光軸上には、光軸に対して同一方向へ彎曲
している一対のシリンドリカル面が配置されてい
ることを特徴とする光学式ピツクアツプの光学装
置。 (2) 一対のシリンドリカル面は一枚のレンズの
両面に形成されている実用新案登録請求の範囲第
1項記載の光学式ピツクアツプの光学装置。[Scope of Claim for Utility Model Registration] (1) A semiconductor laser, an objective lens that focuses a detection beam output from the semiconductor laser to form a detection spot on the recording surface of an optical disk, and a beam reflected from the optical disk. In an optical pickup optical device equipped with a light receiving element for detection, on the optical axis of the detection beam output from the semiconductor laser, there is a pair of cylindrical surfaces curved in the same direction with respect to the optical axis. An optical device for an optical pickup, characterized in that: (2) The optical device of the optical pickup according to claim 1, wherein the pair of cylindrical surfaces are formed on both sides of one lens.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP913587U JPS63118714U (en) | 1987-01-23 | 1987-01-23 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP913587U JPS63118714U (en) | 1987-01-23 | 1987-01-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63118714U true JPS63118714U (en) | 1988-08-01 |
Family
ID=30794163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP913587U Pending JPS63118714U (en) | 1987-01-23 | 1987-01-23 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63118714U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7379411B2 (en) | 2004-03-24 | 2008-05-27 | Konica Minolta Opto, Inc. | Beam shaping device |
JP2016045302A (en) * | 2014-08-21 | 2016-04-04 | カシオ計算機株式会社 | Atypical lens, light source device and projection device |
JP2018063448A (en) * | 2017-12-27 | 2018-04-19 | カシオ計算機株式会社 | Light source device and projection device |
-
1987
- 1987-01-23 JP JP913587U patent/JPS63118714U/ja active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7379411B2 (en) | 2004-03-24 | 2008-05-27 | Konica Minolta Opto, Inc. | Beam shaping device |
JP2016045302A (en) * | 2014-08-21 | 2016-04-04 | カシオ計算機株式会社 | Atypical lens, light source device and projection device |
CN106199783A (en) * | 2014-08-21 | 2016-12-07 | 卡西欧计算机株式会社 | Collimating lens, the light supply apparatus possessing this collimating lens and projection arrangement |
CN106199783B (en) * | 2014-08-21 | 2019-01-29 | 卡西欧计算机株式会社 | Light supply apparatus and projection arrangement |
JP2018063448A (en) * | 2017-12-27 | 2018-04-19 | カシオ計算機株式会社 | Light source device and projection device |