Patent ID: 7875987

Claim:
A structure, comprising: a recessed region of a substrate, said substrate having a top surface; a first row of first mirrors, said first row of first mirrors extending from an initial first mirror to a last first mirror along a first longitudinal axis in a first direction, each first mirror of said first row of first mirrors having a first width measured in said first direction and a first length measured in a second direction, said first direction perpendicular to said second direction, said first mirrors spaced apart a first distance in said first direction; a second row of second mirrors, said second row of second mirrors extending from an initial second mirror to a last second mirror along a second longitudinal axis in said first direction, each second mirror of said second row of second mirrors having a second width measured in said first direction and a second length measured in said second direction, said second mirrors spaced apart a second distance in said first direction; a third row of third mirrors, said third row of third mirrors extending from an initial third mirror to a last third mirror along a third longitudinal axis in said first direction, each third mirror of said third row of third mirrors having a third width measured in said first direction and a third length measured in said second direction, said third mirrors spaced apart a third distance in said first direction; said first, second and third longitudinal axes in a plane parallel to said top surface of said substrate, said first, second and third longitudinal axes parallel to each other, said first, second and third longitudinal axes offset from each other in said first direction, said first longitudinal axis between said second and third longitudinal axes; and said first distance less than said third distance, said third distance greater than said second distance.