Joseph C Lin

US Patent:

20170366763, Dec 21, 2017

Filed:

Jun 20, 2017

Appl. No.:

15/627775

Inventors:

Joseph Hsuhuan Lin - Lowell MA, US
Michael KELLY - North Reading MA, US
Brian TYRRELL - Brookline NH, US

International Classification:

H04N 5/33
G02F 1/1335
G02F 1/133
H04N 7/18

Abstract:

An imaging system uses a dynamically varying coded mask, such as a spatial light modulator (SLM), to time-encode multiple degrees of freedom of a light field in parallel and a detector and processor to decode the encoded information. The encoded information may be decoded at the pixel level (e.g., with independently modulated counters in each pixel), on a read-out integrated circuit coupled to the detector, or on a circuit external to the detector. For example, the SLM, detector, and processor may create modulation sequences representing a system of linear equations where the variables represent a degree of freedom of the light field that is being sensed. If the number of equations and variables form a fully determined or overdetermined system of linear equations, the system of linear equations' solution can be determined through a matrix inverse. Otherwise, a solution can be determined with compressed sensing reconstruction techniques with the constraint that the signal is sparse in the frequency domain.