Patent ID: 8992025
Filing Date: 2015-03-31
Classification: G02B,G03B

Abstract:
1. A rear projection apparatus, comprising: a screen with a front face and a rear face, the screen having only one transmissive Fresnel pane; and projection optics with a first aspherical mirror, a second aspherical mirror and an image module for production of an image projected by means of the projection optics onto the rear face of the screen, wherein the image projected onto the rear face of the screen is perceived on the front face of the screen, the first aspherical mirror has a negative power, the second aspherical mirror has a positive power, and after the image is sequentially reflected by the first aspherical mirror and the second aspherical mirror, the image is directly projected onto the screen, and wherein the projection optics together with the transmissive Fresnel pane are in the form of a rotationally symmetrical system and the projection optics have a same optical axis as the transmissive Fresnel pane.