Patent ID: 9494716
Filing Date: 2016-11-15
CPC Classification: B29D,G02B,Y10T

Claim Text:
1. A micromirror array comprising: two optical elements each having a plurality of parallel linear grooves arranged at predetermined spacings and formed in a first surface of a transparent flat substrate, the two optical elements being stacked together so that the directions in which the linear grooves of the respective optical elements extend are orthogonal to each other as seen in plan view, to thereby constitute a single unit, wherein the two optical elements are stacked together in a manner selected from the group consisting of: (A) a manner in which the front surface of one of the optical elements where the linear grooves are formed and the back surface of the other optical element where the grooves are not formed are brought into abutment with each other; (B) a manner in which the front surfaces of the respective optical elements where the linear grooves are formed are brought into abutment with each other; and (C) a manner in which the back surfaces of the respective optical elements where the grooves are not formed are brought into abutment with each other, wherein the micromirror array is capable of forming a mirror image of an object to be projected which is disposed on a first surface side of the micromirror array at a spatial position on a second surface side thereof symmetrical to the object with respect to the plane of an element surface of the micromirror array.