Concentrators for focal-plane arrays.
It is generally assumed that lenslet arrays are needed to concentrate image light upon the relatively sparse detector areas in a focal-plane array. These have severe field-of-view difficulties and require considerable space to implement. We show how to manufacture optically parallel arrays of concentrators of controllable size and field of view with photorefractive crystals.
H J
HJ
Caulfield
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N
Kukhtarev
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T
Kukhtareva