The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 13, 2021
Filed:
Dec. 12, 2017
Thales, Courbevoie, FR;
Nicolas Tetaz, Cannes, FR;
THALES, Courbevoie, FR;
Abstract
A three-aspherical-mirror anastigmat telescope comprises: means for moving the third mirror linearly along the optical axis of the telescope to make the focal length of the telescope change between a minimum focal length and a maximum focal length, a deformable and controllable mirror, means for changing the optical path between the deformable mirror and the detector, the third mirror having a new conicity determined from an initial conicity, the initial conicity determined from the Korsch equations, the new conicity determined so that the telescope has, in the absence of the deformable mirror and for the minimum and maximum focal lengths, aberrations that are compensable by the deformable mirror, the fixed median position of the deformable mirror and the form of its surface, for the minimum focal length and maximum focal length, respectively, being determined so as to correct the compensable aberrations and to optimize image quality in the focal plane of the telescope according to a preset criterion.