RGBC color filter array patterns to minimize color aliasing

摘要

Implementations of a color filter array comprising a plurality of tiled minimal repeating units. Each minimal repeating unit includes at least a first set of filters comprising three or more color filters, the first set including at least one color filter with a first spectral photoresponse, at least one color filter with a second spectral photoresponse, and at least one color filter with a third spectral photoresponse; and a second set of filters comprising one or more broadband filters positioned among the color filters of the first set, wherein each of the one or more broadband filters has a fourth spectral photoresponse with a broader spectrum than any of the first, second, and third spectral photoresponses, and wherein the individual filters of the second set have a smaller area than any of the individual filters in the first set. Other implementations are disclosed and claimed.

主权项

1. A color filter array comprising:
a plurality of tiled minimal repeating units, each minimal repeating unit including at least:
a first set of filters comprising three or more color filters, the first set including at least one color filter with a first spectral photoresponse, at least one color filter with a second spectral photoresponse, and at least one color filter with a third spectral photoresponse, anda second set of filters comprising one or more broadband filters positioned among the color filters of the first set, wherein each of the one or more broadband filters has a fourth spectral photoresponse with a broader spectrum than any of the first, second, and third spectral photoresponses, and wherein the individual filters of the second set have a smaller area than any of the individual filters in the first set; wherein the first set includes four rectangular color filters arranged to form a quadrilateral annulus and the second set includes a single broadband filter positioned in the interior of the quadrilateral annulus, the quadrilateral annulus being a shape that results when the area of one quadrilateral is subtracted from the interior of a larger quadrilateral that has the same shape and the same center.