Joseph H 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.

US Patent:

20170295337, Oct 12, 2017

Filed:

Jun 28, 2017

Appl. No.:

15/635262

Inventors:

- Baltimore MD, US
Philippe O. Pouliquen - Baltimore MD, US
Andreas G. Andreou - Baltimore MD, US
Joseph H. Lin - Lowell MA, US

International Classification:

H04N 5/378
H04N 5/374
H04N 5/365
G01J 1/44

Abstract:

A computational sensing array includes an array of sensing elements. In each sensing element, a first signal is generated from a transducer. A second signal is produced by a collection unit in response to receiving the first signal. The second signal may be modified, in a conditioning unit. A sensing element preprocessing unit generates a word representing the value of the modified second signal, and may produce an indication of change of the first signal. A current value of the word may be stored in a state holding element local to the sensing element, and a previous value of the word may be retained in a further state holding element local to the sensing element.

US Patent:

20170131143, May 11, 2017

Filed:

Jul 2, 2014

Appl. No.:

15/318373

Inventors:

Andreas G. ANDREOU - Baltimore MD, US
Joseph H. LIN - Arlington MA, US
Philippe O. POULIQUEN - Baltimore MD, US
Charbel G. RIZK - Sykesville MD, US
- Baltimore MD, US

International Classification:

G01J 1/44
H01L 31/02
H01L 31/0352
H01L 31/107

Abstract:

A photodetection circuit includes an avalanche photodiode and a mode switching circuit that may be configured to selectively switch an operating mode of the photodetection circuit between linear mode and Geiger mode. The photodetection circuit may further include a quenching circuit configured to quench and reset the avalanche photodiode in response to an avalanche event when the photodetection circuit is operated in Geiger mode. The photodetection circuit may additionally include an integration circuit configured to integrate photocurrent output by the photodiode and generate integrated charge units when the photodetection circuit is operated in linear mode. The photodetection circuit may also include a counter configured to count pulses output by the avalanche photodiode when the photodetection circuit is operated in Geiger mode and to count integrated charge units generated by the integration circuit when the photodetection circuit is operated in linear mode.

US Patent:

20160050382, Feb 18, 2016

Filed:

Oct 27, 2015

Appl. No.:

14/923784

Inventors:

- Baltimore MD, US
Philippe O. Pouliquen - Baltimore MD, US
Andreas G. Andreou - Baltimore MD, US
Joseph H. Lin - Arlington MA, US

International Classification:

H04N 5/378
H04N 5/357

Abstract:

A computational sensing array includes an array of sensing elements. In each sensing element, a first signal is generated from a transducer. A second signal is produced by a collection unit in response to receiving the first signal. The second signal may be modified, in a conditioning unit. A sensing element preprocessing unit generates a word representing the value of the modified second signal, and may produce an indication of change of the first signal. A current value of the word may be stored in a state holding element local to the sensing element, and a previous value of the word may be retained in a further state holding element local to the sensing element.