US 11,703,321 B2
Retrographic sensors with compact illumination
Edward Adelson, Winchester, MA (US); Branden Romero, Brighton, MA (US); and Filipe Fernandes Veiga, Cambridge, MA (US)
Assigned to Massachusetts Institute of Technology, Cambridge, MA (US)
Filed by Massachusetts Institute of Technology, Cambridge, MA (US)
Filed on Oct. 15, 2020, as Appl. No. 17/71,301.
Claims priority of provisional application 62/915,064, filed on Oct. 15, 2019.
Prior Publication US 2021/0318116 A1, Oct. 14, 2021
Int. Cl. H04N 7/18 (2006.01); G01B 11/24 (2006.01); G01L 1/24 (2006.01); G06F 3/01 (2006.01)
CPC G01B 11/24 (2013.01) [G01L 1/24 (2013.01); G06F 3/016 (2013.01)] 33 Claims
OG exemplary drawing
 
1. A retrographic sensor comprising:
a transparent shell including at least a portion having a curved interior surface and a curved exterior surface;
a transparent elastomeric pad disposed on the curved exterior surface;
an at least partially reflective layer disposed on the transparent elastomeric pad such that the transparent elastomeric pad is disposed between the at least partially reflective layer and the transparent shell; and
one or more light sources configured to emit light into the transparent shell.