JPH0485115U - - Google Patents

Info

Publication number
JPH0485115U
JPH0485115U JP12949790U JP12949790U JPH0485115U JP H0485115 U JPH0485115 U JP H0485115U JP 12949790 U JP12949790 U JP 12949790U JP 12949790 U JP12949790 U JP 12949790U JP H0485115 U JPH0485115 U JP H0485115U
Authority
JP
Japan
Prior art keywords
superimposing
diffraction grating
interference fringes
split
encoder
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
JP12949790U
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 JP12949790U priority Critical patent/JPH0485115U/ja
Publication of JPH0485115U publication Critical patent/JPH0485115U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】
第1図はこの考案の一実施例のエンコーダの概
略構成を示す図である。第2図は従来のエンコー
ダの概略構成を示す図である。 図において、1は光源、2はコリメータレンズ
、3は偏光ビームスプリツタ、4は回折格子、5
a,5bは反射ミラー、6はビームスプリツタ、
7a,7bは1/2波長板、8a,8bは光検出器
を示す。

Claims (1)

  1. 【実用新案登録請求の範囲】 可干渉性光束を光束分割手段により分割し、分
    割したそれぞれの光束を被検物体に付された回折
    格子に入射させ、その回折格子からの反射回折光
    どうしを重ね合わせ手段により重ね合わせて干渉
    縞を形成し、その干渉縞を計数することによつて
    被検物体の移動量を測定するエンコーダにおいて
    、 前記光束分割手段と前記重ね合わせ手段とが単
    一のビームスプリツタで構成されたことを特徴と
    する、エンコーダ。
JP12949790U 1990-11-29 1990-11-29 Pending JPH0485115U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12949790U JPH0485115U (ja) 1990-11-29 1990-11-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12949790U JPH0485115U (ja) 1990-11-29 1990-11-29

Publications (1)

Publication Number Publication Date
JPH0485115U true JPH0485115U (ja) 1992-07-23

Family

ID=31876896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12949790U Pending JPH0485115U (ja) 1990-11-29 1990-11-29

Country Status (1)

Country Link
JP (1) JPH0485115U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8949906B2 (en) 1997-10-06 2015-02-03 Rovi Guides Inc. Interactive television program guide system with pay program package promotion

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8949906B2 (en) 1997-10-06 2015-02-03 Rovi Guides Inc. Interactive television program guide system with pay program package promotion

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