JPS5960744U - optical pick up - Google Patents

optical pick up

Info

Publication number
JPS5960744U
JPS5960744U JP15357782U JP15357782U JPS5960744U JP S5960744 U JPS5960744 U JP S5960744U JP 15357782 U JP15357782 U JP 15357782U JP 15357782 U JP15357782 U JP 15357782U JP S5960744 U JPS5960744 U JP S5960744U
Authority
JP
Japan
Prior art keywords
liquid crystal
linearly polarized
optical pick
collimator lens
beam splitter
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
Application number
JP15357782U
Other languages
Japanese (ja)
Other versions
JPH0437290Y2 (en
Inventor
拾井　央
Original Assignee
オンキヨー株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by オンキヨー株式会社 filed Critical オンキヨー株式会社
Priority to JP15357782U priority Critical patent/JPS5960744U/en
Publication of JPS5960744U publication Critical patent/JPS5960744U/en
Application granted granted Critical
Publication of JPH0437290Y2 publication Critical patent/JPH0437290Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)
  • 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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は光学式ピックアップの＝般的な構成を示す図、
第２図は本考案の要部構成を示す射視図、第３図は同、
液晶の説明図、第４図は同、他の実施例の要部構成図で
ある。 １はレーザ、２はコリメータレンズ、３は偏光−ビーム
スプリッタ、４は１７４波長板、５は対物レンズ、６は
ディスク、１２は液晶であ名。Figure 1 is a diagram showing the general configuration of an optical pickup.
Figure 2 is a perspective view showing the main structure of the present invention, Figure 3 is the same,
FIG. 4, which is an explanatory diagram of the liquid crystal, is a main part configuration diagram of another embodiment of the same. 1 is a laser, 2 is a collimator lens, 3 is a polarizing beam splitter, 4 is a 174 wavelength plate, 5 is an objective lens, 6 is a disk, and 12 is a liquid crystal.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 、レーザ１からの直線偏光ビームをコリメータレンズ２
によって平行光に変換１、偏光ビームスプリッタ３で反
射した直線偏光ビームを１７４波長板４、対物レンズ５
を通してディスク６の信号ピッ゛　ト面に集束させるよ
うにした構成において、上記コリメータレンズ２と偏光
ビームスプリッタ３との間にツィステッド・ネマチック
液晶１２を配置し、当該液晶°１２に印加される電圧を
オン・オフ制ｉするようにしたことを特徴とする光学式
ピックアップ。, the linearly polarized beam from laser 1 is passed through collimator lens 2
The linearly polarized beam reflected by the polarizing beam splitter 3 is converted into parallel light by the 174 wavelength plate 4 and the objective lens 5.
In this configuration, a twisted nematic liquid crystal 12 is disposed between the collimator lens 2 and the polarizing beam splitter 3, and the voltage applied to the liquid crystal 12 is An optical pickup characterized by an on/off system.
JP15357782U 1982-10-08 1982-10-08 optical pick up Granted JPS5960744U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15357782U JPS5960744U (en) 1982-10-08 1982-10-08 optical pick up

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15357782U JPS5960744U (en) 1982-10-08 1982-10-08 optical pick up

Publications (2)

Publication Number Publication Date
JPS5960744U true JPS5960744U (en) 1984-04-20
JPH0437290Y2 JPH0437290Y2 (en) 1992-09-02

Family

ID=30339735

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15357782U Granted JPS5960744U (en) 1982-10-08 1982-10-08 optical pick up

Country Status (1)

Country Link
JP (1) JPS5960744U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239945A (en) * 1984-05-15 1985-11-28 Seiko Epson Corp Multi-optical head for optical memory

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60239945A (en) * 1984-05-15 1985-11-28 Seiko Epson Corp Multi-optical head for optical memory

Also Published As

Publication number Publication date
JPH0437290Y2 (en) 1992-09-02

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