Lauren Ashley White

US Patent:

20170230596, Aug 10, 2017

Filed:

Oct 21, 2016

Appl. No.:

15/331455

Inventors:

Curtis B. Colonero - Shrewsbury MA, US
Michael W. Kelly - North Reading MA, US
Megan H. Blackwell - Winchester MA, US
Lauren L. White - Lowell MA, US

International Classification:

H04N 5/355
H04N 5/378
H04N 5/372

Abstract:

In time-delay-and-integrate (TDI) imaging, a charge-couple device (CCD) integrates and transfers charge across its columns. Unfortunately, the limited well depth of the CCD limits the dynamic range of the resulting image. Fortunately, TDI imaging can be implemented with a digital focal plane array (DFPA) that includes a detector, analog-to-digital converter (ADC), and counter in each pixel and transfer circuitry connected adjacent pixels. During each integration period in the TDI scan, each detector in the DFPA generates a photocurrent that the corresponding ADC turns into digital pulses, which the corresponding counter counts. Between integration periods, the DFPA transfers the counts from one column to the next, just like in a TDI CCD. The DFPA also non-destructively transfers some or all of the counts to a separate memory. A processor uses these counts to estimate photon flux and correct any rollovers caused by “saturation” of the counters.

Address:

513 Westover Dr, Euless, TX 76039

VIN:

2CNDL73F276104472

Make:

CHEVROLET

Model:

EQUINOX

Year:

2007