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:
Aug. 10, 2021
Filed:
May. 10, 2018
Thales, Courbevoie, FR;
Nicolas Tetaz, Cannes, FR;
Cyril Ruilier, Cannes, FR;
THALES, Courbevoie, FR;
Abstract
A bifocal anastigmatic telescope with five aspherical mirrors, comprises: a concave first mirror, a convex second mirror, a concave third mirror and a first detector, which are common to a first and second focal length of the telescope, a first fourth mirror and a first fifth mirror that are associated with the first focal length, and a second fourth mirror and a second fifth mirror that are associated with the second focal length, the first mirror and the second mirror being arranged to form, from an object at infinity, an intermediate image situated between the second mirror and the third mirror, and for each focal length: the fixed positions and forms of the mirrors associated with the focal length being determined from the generalized Korsch equations with 5 mirrors, with the constraint of the first, second and third mirror and of the first focal plane that are common to the two focal lengths, and so as to optimize the image quality in the first focal plane of the telescope in accordance with a predetermined criterion.