US 11,988,508 B1
Digital holographic tomography turbulence measurements
Samuel Trent Thurman, Arvada, CO (US); Anthony Klee, Lafayette, CO (US); and Thomas G. Alley, Broomfield, CO (US)
Assigned to Lockheed Martin Corporation, Bethesda, MD (US)
Filed by Lockheed Martin Corporation, Bethesda, MD (US)
Filed on Jan. 13, 2022, as Appl. No. 17/574,968.
Claims priority of provisional application 63/221,244, filed on Jul. 13, 2021.
Claims priority of provisional application 63/137,785, filed on Jan. 15, 2021.
Int. Cl. G01B 9/02 (2022.01); G01B 9/02091 (2022.01); G02B 5/18 (2006.01); G03H 1/04 (2006.01)
CPC G01B 9/02091 (2013.01) [G01B 9/02044 (2013.01); G02B 5/1814 (2013.01); G03H 1/0443 (2013.01); G03H 2001/045 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
generating a source optical beam and a reference optical beam;
diffracting the source optical beam to produce multiple test beams;
directing the multiple test beams through a test volume housing a test article such that the multiple test beams propagate at different angles through the test volume;
interfering the multiple test beams and the reference optical beam onto a detector such that at least the multiple test beams are defocused on the detector and a pixel saturation of the detector is avoided; and
processing one or more signals produced by the detector to determine turbulence measurements associated with at least the test article.