US 11,898,907 B1
Freeform offner spectrometer
Benjamin James Lewis, Redondo Beach, CA (US)
Assigned to Raytheon Company, Tewksbury, MA (US)
Filed by Raytheon Company, Waltham, MA (US)
Filed on Sep. 19, 2022, as Appl. No. 17/948,153.
Int. Cl. G01J 3/28 (2006.01); G01J 3/02 (2006.01); G01J 3/04 (2006.01); G01J 3/18 (2006.01)
CPC G01J 3/0208 (2013.01) [G01J 3/04 (2013.01); G01J 3/18 (2013.01); G01J 3/2823 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An optical guide device configured to guide electromagnetic radiation along an optical path, the optical guide device comprising:
a first prism positioned in the optical path; and
a focusing optic positioned in the optical path;
wherein the first prism comprises at least one freeform prism surface having at least some degree of cylindrical curvature, and having freeform polynomial terms formed thereon.