US 5,327,234 A · Time delay and integrate focal plane array detector

Abstract

System and method to achieve high resolution and sensitivity from scanned focal plane array detectors without generating objectionable articfacts by scanning a scene in alternate odd and even channels at a predetermined scanning rate to provide a plurality of equally time spaced samples in each channel, offsetting the samples in the even channels relative to the odd channels to be time spaced intermediate adjacent samples of the odd channels, forming a plurality of odd TV lines, each of the odd lines composed of the samples from a different one of the odd channels and the interstices between the samples in each of the odd lines being composed of a sample which is a function of the samples abutting each of the interstices in the odd lines, forming a plurality of even TV lines, each of the even lines composed of the samples from a different one of the even channels and the interstices between the samples in each of the even lines being composed of a sample which is a function of the samples abutting each of the interstices in the even lines and generating video signals from the odd TV lines and the even TV lines in interlaced manner at a multiple of the predetermined rate.

Claims20

Dependent claims

A forward looking infrared system, comprising:

(a) a scanner for scanning a scene in alternate odd and even channels at a predetermined scanning rate to provide a plurality of equally time spaced samples in each said channel;
(b) an offsetting circuit offsetting said samples in said even channels relative to said odd channels to be time spaced intermediate adjacent samples of said odd channels;
(c) a storage circuit storing a plurality of odd TV lines, each of said odd lines composed of the samples from a different one of said odd channels with individual samples from the following even channel disposed between an adjacent pair of samples of said odd channel and a plurality of even TV lines, each of said even lines composed of the samples from a different one of said even channels with individual samples from the following odd channel disposed between an adjacent pair of samples of said even channel;
and
(d) video generating circuitry for generating video signals from said odd TV lines and said even TV lines in interlaced manner at a multiple of said predetermined rate;
(e) wherein said scanner includes a plurality of detector elements arranged in columns and channels, and plural summing devices, each summing device associated with a different predetermined plurality of said detector elements in one of said channels to provide said sample for the associated channel.

3 more elements

Dependencies are inferred from the claim text.

Time delay and integrate focal plane array detector

Life of this patent

Time delay and integrate focal plane array detector

Life of this patent

Abstract

Claims20