JPH0360020U

JPH0360020U -

Info

Publication number: JPH0360020U
Application number: JP12018589U
Authority: JP
Priority date: 1989-10-14
Filing date: 1989-10-14
Publication date: 1991-06-13

Description

[Brief explanation of the drawing]

第１図は、この考案の一実施例に係るロータリ
ーエンコーダの要部拡大図、第２図は、同ロータ
リーエンコーダの固定スリツト板上のスリツト配
置を示す図、第３図は、従来のロータリーエンコ
ーダを説明する斜視図、第４図は、同従来のロー
タリーエンコーダの固定スリツト板上のスリツト
配置を示す図である。２……発光ダイオード、３……固定スリツト板
、４ａ，６ｂ……主信号用スリツト、４ｂ，６ｂ
……原点信号用スリツト、５……回転スリツト板
、８……ホトダイオード、Ａ……照射スポツト。 FIG. 1 is an enlarged view of the main parts of a rotary encoder according to an embodiment of the invention, FIG. 2 is a diagram showing the arrangement of slits on a fixed slit plate of the same rotary encoder, and FIG. 3 is a diagram showing a conventional rotary encoder. FIG. 4 is a perspective view illustrating the arrangement of slits on a fixed slit plate of the conventional rotary encoder. 2... Light emitting diode, 3... Fixed slit plate, 4a, 6b... Main signal slit, 4b, 6b
...Slit for origin signal, 5... Rotating slit plate, 8... Photodiode, A... Irradiation spot.

Claims

[Scope of Claim for Utility Model Registration] A light projecting element having a lens, a light receiving element receiving light from the light projecting element, and a light receiving element fixed between the light projecting element and the light receiving element and having slits arranged in a row. An optical encoder comprising a fixed slit plate and a movable slit plate provided between the light emitting element and the light receiving element and having slits arranged along the direction of movement of the movable slit plate, the lens of the light emitting element This is an optical device characterized in that the irradiation spot of the light emitting element is shaped into an ellipse, with a curvature so that the light is parallel in the direction in which the slits are arranged and spread in a direction perpendicular to the direction in which the slits are arranged. expression encoder.