JPH03101420U

JPH03101420U -

Info

Publication number: JPH03101420U
Application number: JP961790U
Authority: JP
Priority date: 1990-02-01
Filing date: 1990-02-01
Publication date: 1991-10-23

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示す構成説明図
、第２図は第１図の−断面図、第３図は第１
図の−断面図、第４図はこの考案の第二の実
施例の第２図相当図、第５図は第二の実施例の第
３図相当図、第６図はこの考案の第三の実施例の
要部斜視図、第７図は第三の実施例の第２図相当
図、第８図は第三の実施例の第３図相当図である
。１……光学式測定装置、２……メインスケール
、３，４……インデツクススケール、５……発光
素子、６，７，８……受光素子、９……演算手段
、Ｄ，ｄ……間隙幅。 Fig. 1 is a configuration explanatory diagram showing an embodiment of this invention, Fig. 2 is a cross-sectional view of Fig. 1, and Fig. 3 is a cross-sectional view of Fig. 1.
Fig. 4 is a view corresponding to Fig. 2 of the second embodiment of this invention, Fig. 5 is a view equivalent to Fig. 3 of the second embodiment, and Fig. 6 is a view corresponding to Fig. 3 of the second embodiment of this invention. 7 is a view corresponding to FIG. 2 of the third embodiment, and FIG. 8 is a view corresponding to FIG. 3 of the third embodiment. DESCRIPTION OF SYMBOLS 1... Optical measuring device, 2... Main scale, 3, 4... Index scale, 5... Light emitting element, 6, 7, 8... Light receiving element, 9... Calculating means, D, d... Gap width.

Claims

[Claims for Utility Model Registration] A main scale, an index scale disposed parallel to the main scale, a light emitting element, and a light emitting element disposed on the opposite side of the main scale with respect to the index scale. a first light-receiving element and a second light-receiving element, and a calculating means for calculating the amount of relative positional displacement between the main scale and the index scale based on signals from these light-receiving elements, the first light-receiving element The first gap width between the main scale and index scale, which are located opposite to each other, is different from the second gap width between the main scale and index scale, which are located opposite to the second light-receiving element. Characteristic optical measuring device.