Patent ID: 9182579
Filing Date: 2015-11-10
Classification: G02B

Abstract:
1. A device for taking long-distance images, successively comprising: a catadioptric optical system that forms a first image of the observed scene; a variable focal length optical system having an aperture and a second image of said aperture in an image space; an optical system to shape beams forming the first image, positioned close to the first image generated by the catadioptric system, which adjusts the exit aperture of the catadioptric system on the second image of the aperture in the image space of the variable focal length optical system; wherein the assembly consisting of the catadioptric optical system and the optical system to shape the beams generates a third image of the observed scene; wherein the variable focal length optical system is positioned back-to-front, and a focal plane of the variable focal length optical system is superposed over an image plane of an assembly consisting of the catadioptric optical system and the optical system to shape the beam, and wherein the variable focal length optical system focuses the third image to infinity; a projection lens receiving the light beam output by the variable focal length system to form a fourth image of the observed scene at the focal plane of the projection lens; and an image sensor positioned at the focal plane of the projection lens.