High-efficiency, multilevel, diffractive optical elements

Optical: systems and elements – Diffraction – From zone plate

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359355, 359569, 359742, 101473, 353 53, G02B 308, G02B 2744, B41M 500

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active

051610590

ABSTRACT:
A high-efficiency, diffractive optical element having at least one surface including multilevel steps, the steps determined by calculating equiphase boundaries utilizing a disclosed equation and algorithm. The optical element can be adapted to correct for chromatic and/or spherical aberration, and can be used in UV lithographic apparatus.

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