US 12,140,774 B2
Light field-based beam correction systems and methods
Chensheng Wu, Greenbelt, MD (US); Jonathan Ko, Davidsonville, MD (US); John R. Rzasa, College Park, MD (US); Christopher C. Davis, Annapolis, MD (US); and Daniel Paulson, Hyattsville, MD (US)
Assigned to University of Maryland, College Park, College Park, MD (US)
Filed by UNIVERSITY OF MARYLAND, COLLEGE PARK, College Park, MD (US)
Filed on Dec. 2, 2021, as Appl. No. 17/540,644.
Claims priority of provisional application 63/120,655, filed on Dec. 2, 2020.
Prior Publication US 2022/0171204 A1, Jun. 2, 2022
Int. Cl. G02B 27/09 (2006.01); G02B 3/00 (2006.01); G02B 27/00 (2006.01); G06T 7/557 (2017.01); G06T 7/70 (2017.01); H04N 23/957 (2023.01)
CPC G02B 27/0916 (2013.01) [G02B 3/0037 (2013.01); G02B 27/0025 (2013.01); G02B 27/0068 (2013.01); G06T 7/557 (2017.01); G06T 7/70 (2017.01); H04N 23/957 (2023.01); G06T 2207/10052 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A light beam correction system comprising:
(a) a plenoptic sensor module comprising:
an objective lens assembly (OLA) having a first effective focal length (EFL) and being arranged to receive a light beam with an aberrated wavefront and a wavelength, λ;
a microlens array (MLA) having a second EFL and being arranged to receive the light beam from the OLA; and
a photodetector having a two-dimensional array of pixels and being arranged to receive the light beam from the MLA,
wherein a focal plane at the first EFL behind the OLA coincides with a focal plane at the second EFL in front of the MLA, and an imaging plane of the photodetector coincides with a focal plane at the second EFL behind the MLA, and
(b) a controller comprising one or more processors and computer readable storage media storing instructions that, when executed by the one or more processors, cause the controller to:
(i) receive one or more signals from the photodetector indicative of sorted four-dimensional (4D) light field information regarding the light beam;
(ii) reconstruct the aberrated wavefront of the light beam based on the sorted 4D light-field information, the reconstructed wavefront having a phase accuracy in a range of λ/2 to λ/30, inclusive; and
(iii) control, based on the reconstructed wavefront, a plurality of actuators of an adaptive optics (AO) device so as to modify the light beam to correct for an aberration of the wavefront.