JPH043314U

JPH043314U -

Info

Publication number: JPH043314U
Application number: JP4493490U
Authority: JP
Priority date: 1990-04-25
Filing date: 1990-04-25
Publication date: 1992-01-13

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す斜視図、第２図
は固定円板の要部拡大平面図、第３図は平面光電
変換素子の要部拡大平面図である。１……回転軸、２……回転円板、２１……回転
スリツト、３……全周反射器、３１……内側反射
面、３２……外側反射面、４……レンズ、５……
発光素子、６……固定円板、６１……固定スリツ
ト、７……平面光電変換素子。 FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is an enlarged plan view of a main part of a fixed disk, and FIG. 3 is an enlarged plan view of a main part of a planar photoelectric conversion element. DESCRIPTION OF SYMBOLS 1...Rotating shaft, 2...Rotating disk, 21...Rotating slit, 3...Full-circumference reflector, 31...Inner reflecting surface, 32...Outer reflecting surface, 4...Lens, 5...
Light emitting element, 6... Fixed disk, 61... Fixed slit, 7... Planar photoelectric conversion element.

Claims

[Claims for Utility Model Registration] 1. A rotating disk fixed to a rotating shaft and provided with annular radial rotating slits at predetermined pitches, and a light emitting element provided on one surface of the rotating disk. , a fixed disk having fixed slits facing the other surface of the rotating disk and provided in an annular shape at the same pitch as the rotating slits; and a fixed disk provided on the opposite side of the rotating disk to the rotating disk. , an optical encoder comprising an annular planar photoelectric conversion element provided at a position with the same diameter as the rotation slit, comprising: a lens that converges the light beam emitted from the light emitting element into a parallel light beam parallel to the rotation axis; A full-circle reflector that reflects a parallel light beam emitted from the lens and emits an annular light beam that is parallel to the rotation axis and has the same diameter as the rotation slit is provided between the rotating disk and the light emitting element. An optical encoder featuring: 2. The full-circumference reflector has an inner reflecting surface made of a conical surface having an angle of 45 degrees with respect to the rotation axis, and a conical surface facing the inner reflection surface and having an angle of 45 degrees with respect to the rotation axis. The optical encoder according to claim 1, further comprising an outer reflective surface.