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US 8,014,062 B2Granted
Method of making a close proximity filter and multi color MWIR sensor and resultant device
AssigneeLockheed Martin Corporation
InventorsJeffrey W. Scott, Gene R. Loefer, Nicholas J. Pfister
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Abstract
The present invention relates generally to a method and apparatus for attaching a close proximity filter to an FPA (focal plane array) and more particularly, to a method and apparatus that allows improved spectral discrimination of a mid-wave infra red (MWIR) detector by applying an improved multi-color filter to a focal plane array (FPA), while employing existing production equipment and techniques to reduce cost and improve production yield.
Claims17
A pixel-level patterned band-pass filter applied to a focal plane array, the filter comprising:
- a substrate material;
- a band-pass filter applied in a specified pixel-level pattern to a first side of said substrate;
- and
- a broad-band anti-reflective coating applied to a second side of said substrate;
- where the pixel-level patterned band-pass filter has a specified thickness and material composition;
- where the pattern of the band-pass filter alternates pixel-level filter areas of a narrow detection waveband with pixel-level filter areas of a broad detection waveband;
- where the broad detection waveband includes the narrow detection waveband such that the pattern produces a first image in the broad detection waveband overlapped with a second image in the narrow detection waveband;
- and
- where the second image is generated at a higher pixel resolution than the first image.
6 more elements
Dependencies are inferred from the claim text.