Patent ID: 9097967
Filing Date: 2015-08-04
Classification: G02B,G03B,H04N

Abstract:
1. A projection device, comprising: a first tilting mirror matrix; a second tilting mirror matrix, wherein each of the first and second tilting mirror matrixes include a plurality of tilting mirrors and a cover glass covering the tilting mirrors; an imaging lens system, including a relay lens system which images the tilting mirrors of the first tilting mirror matrix onto the tilting mirrors of the second tilting mirror matrix and thus light reflected by tilting mirrors of the first tilting mirror matrix onto tilting mirrors of the second tilting mirror matrix; and a projection lens system, which projects light reflected by tilting mirrors of the second tilting mirror matrix, in order to produce an image, wherein the imaging lens system further includes a correction element which corrects at least one image error caused by the light obliquely passing through the cover glasses, and wherein the correction element includes a curved surface, which is formed as a free-form surface, the curvature of which runs differently in two sections running perpendicular to one another and changes depending on the position on the surface.