JPH03106525U - - Google Patents

Info

Publication number
JPH03106525U
JPH03106525U JP1585790U JP1585790U JPH03106525U JP H03106525 U JPH03106525 U JP H03106525U JP 1585790 U JP1585790 U JP 1585790U JP 1585790 U JP1585790 U JP 1585790U JP H03106525 U JPH03106525 U JP H03106525U
Authority
JP
Japan
Prior art keywords
optical disk
wavelength plate
optical axis
beam splitter
recording surface
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
Application number
JP1585790U
Other languages
English (en)
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 filed Critical
Priority to JP1585790U priority Critical patent/JPH03106525U/ja
Publication of JPH03106525U publication Critical patent/JPH03106525U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Optical Recording Or Reproduction (AREA)

Description

【図面の簡単な説明】
第1図は本考案の実施例を示す側面図、第2図
は従来例を示す側面図、第3図は要部を拡大した
側面図である。 4……光デイスク、5……駆動装置、8……第
一の1/4波長板、13……面傾斜面変位測定装置
、14……第二の1/4波長板、15……反射ミラ
ー。

Claims (1)

    【実用新案登録請求の範囲】
  1. 回転自在に支持した光デイスクの記録面に照射
    して反射された検査光を光検出装置で受光して前
    記光デイスクの面振れ量等を測定する面傾斜面変
    位測定装置において、光源装置が対向配置された
    ビームスプリツタの反射光軸上に第一の1/4波長
    板を介して前記光デイスクの記録面を位置させ、
    この光デイスクの記録面で反射されて前記第一の
    1/4波長板とビームスプリツタとを透過した検査
    光の光軸上に第二の1/4波長板を介して反射ミラ
    ーを配置し、この反射ミラーの光軸上に前記第二
    の1/4波長板を介して位置する前記ビームスプリ
    ツタの反射光軸上に前記光検出装置を配置したこ
    とを特徴とする面傾斜面変位測定装置。
JP1585790U 1990-02-20 1990-02-20 Pending JPH03106525U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1585790U JPH03106525U (ja) 1990-02-20 1990-02-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1585790U JPH03106525U (ja) 1990-02-20 1990-02-20

Publications (1)

Publication Number Publication Date
JPH03106525U true JPH03106525U (ja) 1991-11-05

Family

ID=31519146

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1585790U Pending JPH03106525U (ja) 1990-02-20 1990-02-20

Country Status (1)

Country Link
JP (1) JPH03106525U (ja)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5771537A (en) * 1980-10-20 1982-05-04 Mitsubishi Electric Corp Optical pickup device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5771537A (en) * 1980-10-20 1982-05-04 Mitsubishi Electric Corp Optical pickup device

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