Diffraction theory of Fresnel lenses encoded in low-resolution devices

Carcolé i Carrubé, EduardBosch i Puig, SalvadorCampos Coloma, Juan2012-04-202012-04-2019940003-6935https://hdl.handle.net/2445/24282A mathematical model that describes the behavior of low-resolution Fresnel lenses encoded in any low-resolution device (e.g., a spatial light modulator) is developed. The effects of low-resolution codification, such the appearance of new secondary lenses, are studied for a general case. General expressions for the phase of these lenses are developed, showing that each lens behaves as if it were encoded through all pixels of the low-resolution device. Simple expressions for the light distribution in the focal plane and its dependence on the encoded focal length are developed and commented on in detail. For a given codification device an optimum focal length is found for best lens performance. An optimization method for codification of a single lens with a short focal length is proposed.13 p.application/pdfeng(c) Optical Society of America, 1994DifraccióÒptica electrònicaDiffractionElectron opticsDiffraction theory of Fresnel lenses encoded in low-resolution devicesinfo:eu-repo/semantics/article88022info:eu-repo/semantics/openAccess