Abstract
Diffractive optical elements with blazed profiles can, in theory, have
100% relative efficiency. We review several methods for making such
elements and compare their advantages and limitations. Our emphasis is on
processes to produce elements other than those with approximate, stepped
surfaces, such as binary optical elements. For optical methods, we offer an
expression relating the maximum numerical aperture of a diffractive lens with
a given maximum efficiency to the numerical aperture of the recording
system.
© 1997 Optical Society of America
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