Longwave IR focal-plane binary optics
نویسندگان
چکیده
In this paper we discuss a choice between the diffractive and refractive binary micro-lenses for the longwave IR FPA. To investigate diffraction on the micro-lenses we have used a numerical code based-on the rigorous electromagnetic theory, because neither geometrical optics nor thin element approach of scalar diffraction theory can correctly describe waveguide, shadowing and interference effects inside the micro-lens surface relief. These effects strongly influence the micro-lens diffraction efficiency when the width of the surface-relief features is close to the wavelength.
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