Light diffraction element unit and optical computation device

Abstract

A light diffraction element unit includes a base material including a light-transmissive and flexible layer member, a light diffraction structure including microcells and disposed on a portion of a main surface of the base material, and a holding part holding the base material and including a layer member or a plate member having an opening that penetrates through a pair of main surfaces of the layer member or the plate member. The holding part holds an annular portion of the base material such that the light diffraction structure is encompassed in the opening. The annular portion surrounds the portion of the main surface of the base material.

CPC Classifications