1994•Applied OpticsRequires access
Focal-plane pixel-energy redistribution and concentration by use of microlens arrays
W. H. Southwell
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Abstract
A physical-optics calculation was performed to study the effects of a microlens array placed over a focal-plane detector array. In certain conditions the light is further concentrated to a spot size that is smaller than the point-spread function of the receiver optics. It is also shown that the microlens refocuses a sinc-squared point-spread function to a shape that is more uniform as well as narrower. Numerical examples were made for the far IR.