Abstract
Binary Fresnel lenses produce focused spots at subharmonics of the principal focal length of the lens. The intensities of these focal spots can be controlled by variation of the relative widths of the rings of the Fresnel lens compared with the spacings between the rings. Theory is presented and experimental verification is provided with Fresnel lenses written onto the magneto-optic spatial light modulator.
© 1994 Optical Society of America
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