Code plate of optical encoder

Abstract

The present invention discloses code plate of an optical encoder having a planar portion that is located on a surface to which a light flux for detection is applied; and a non-planar portion that is arranged alternatively with the planar portion on the surface and is comprised of multiple convex structures and concave structures arranged continuously intersecting to a parallel direction of arranging the planar portion and the non-planar portion. The longitudinal direction in the planar portion and the non-planar portion is consistent with the radial direction of the code plate, and a direction (Parallel direction) in which the planar portion and the non-planar portion are arranged alternately is consistent with the circumferential direction of the code plate. The non-planar portion which forms the concave and convex structure is formed by arranging multiple V-shaped structures in the longitudinal direction of the non-planar portion. Since the multiple V-shaped structures are arranged in the direction in which the non-planar portion is extending, the width of the V-shaped structure is not restricted by the width of the non-planar portion in the parallel direction.

Dependencies are inferred from the claim text.