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:
Mar. 05, 2024
Filed:
Mar. 19, 2021
Raytheon Company, Waltham, MA (US);
Raytheon Company, Tewksbury, MA (US);
Abstract
A zoom system includes a collection optic Land a reflective Fresnel Lens Lhaving a variable focal length. The reflective Fresnel Lens Lis implemented with a MEMS MMA in which the mirrors tip, tilt and piston form and alter the reflective Fresnel Lens to focus light at a common focal point to set the variable focal length f2, hence the magnification M. In different embodiments, the zoom system may be configured to be 'focal' or “afocal”. In the focal system, both Land Lare fixed such that the system affects the net convergence or divergence of the magnified beam. In an afocal system, a mechanism is used to translate Lto maintain a separation between Land Lof d=f1+f2 as f2 is varied to change the magnification M.