US 12,348,846 B2
Method and apparatus for extending operational availability for terrestrial optical surveillance systems
Richard B. Holmes, Albuquerque, NM (US); and Steven F. Griffin, Kihei, HI (US)
Assigned to The Boeing Company, Arlington, VA (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Oct. 12, 2021, as Appl. No. 17/499,564.
Claims priority of provisional application 63/134,088, filed on Jan. 5, 2021.
Prior Publication US 2023/0164410 A1, May 25, 2023
Int. Cl. H04N 23/55 (2023.01); G02B 7/18 (2021.01); G02B 7/183 (2021.01); G02B 23/06 (2006.01); G02B 23/16 (2006.01); H04N 23/51 (2023.01); H04N 23/52 (2023.01)
CPC H04N 23/55 (2023.01) [G02B 7/181 (2013.01); G02B 7/183 (2013.01); G02B 23/06 (2013.01); G02B 23/16 (2013.01); H04N 23/51 (2023.01); H04N 23/52 (2023.01)] 23 Claims
OG exemplary drawing
 
1. An optical surveillance system, comprising:
a primary mirror;
a secondary mirror;
a support structure extending between the primary mirror and the secondary mirror, the support structure retaining the secondary mirror along an optical axis of the primary mirror, the support structure comprising a head ring disposed adjacent to the secondary mirror; and
a flexible first cover, between the primary mirror and the secondary mirror, affixed to the support structure, the first cover having a first end at least partially sealingly disposed around a periphery of the primary mirror and a second end at least partially sealingly disposed around the head ring.