JPS58131435U - Focus adjustment lens in optical recording and reproducing equipment - Google Patents
Focus adjustment lens in optical recording and reproducing equipmentInfo
- Publication number
- JPS58131435U JPS58131435U JP2708682U JP2708682U JPS58131435U JP S58131435 U JPS58131435 U JP S58131435U JP 2708682 U JP2708682 U JP 2708682U JP 2708682 U JP2708682 U JP 2708682U JP S58131435 U JPS58131435 U JP S58131435U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- focus adjustment
- light
- optical recording
- adjustment lens
- 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
Landscapes
- Optical Head (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図ないし第３図は、光学的記録再生装置における焦
点調整を説明するための図、第４図は、本考案の１実施
例を示す斜視図、第５図は、本考案の別実施例を示す斜
視図である。
１・・・光源、２・・・カップリングレンズ、３・・・
偏光ビームスプリッタ−１４・・・１八波長板、５・・
・対物 −レンズ、６・・・情報記録媒体、７・・
・球面レンズ、８・・・シリンドリカルレンズ、９・・
・４分割受光素子、１３．１４・・・焦点調整用レンズ
。1 to 3 are diagrams for explaining focus adjustment in an optical recording/reproducing device, FIG. 4 is a perspective view showing one embodiment of the present invention, and FIG. 5 is another embodiment of the present invention. It is a perspective view showing an example. 1... Light source, 2... Coupling lens, 3...
Polarizing beam splitter 14...1 8-wave plate, 5...
・Objective - Lens, 6... Information recording medium, 7...
・Spherical lens, 8... Cylindrical lens, 9...
- 4-split light receiving element, 13.14...lens for focus adjustment.
Claims (1)
し、情報記録媒体に対してζ情報の記録もしくは読み出
し再生を行なう光学的記録再生装置において、上記情報
記録媒体からの反射光もしくは透過光を受光手段上へ導
いて、上記対物レンズの焦点調整を行なうためのレンズ
であって、一方のレンズ面が球面に形成され、他方のレ
ンズ面が円筒面に形成され、プラスチック材により単体
に形成されたことを特徴とする１、焦点調整用レンズ。In an optical recording and reproducing device that focuses light from a light source onto an information recording medium using an objective lens and records or reads and reproduces ζ information on the information recording medium, reflected light or transmitted light from the information recording medium is used. A lens for guiding the light onto the light receiving means and adjusting the focus of the objective lens, one lens surface is formed into a spherical surface, the other lens surface is formed into a cylindrical surface, and the lens is formed singly from a plastic material. 1. Focus adjustment lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2708682U JPS58131435U (en) | 1982-02-26 | 1982-02-26 | Focus adjustment lens in optical recording and reproducing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2708682U JPS58131435U (en) | 1982-02-26 | 1982-02-26 | Focus adjustment lens in optical recording and reproducing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58131435U true JPS58131435U (en) | 1983-09-05 |
Family
ID=30039006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2708682U Pending JPS58131435U (en) | 1982-02-26 | 1982-02-26 | Focus adjustment lens in optical recording and reproducing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58131435U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61240444A (en) * | 1985-04-17 | 1986-10-25 | Mitsubishi Electric Corp | Optical pickup device |
| JP2015001997A (en) * | 2013-06-18 | 2015-01-05 | 船井電機株式会社 | Optical pickup device |
-
1982
- 1982-02-26 JP JP2708682U patent/JPS58131435U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61240444A (en) * | 1985-04-17 | 1986-10-25 | Mitsubishi Electric Corp | Optical pickup device |
| JP2015001997A (en) * | 2013-06-18 | 2015-01-05 | 船井電機株式会社 | Optical pickup device |
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