Abstract

A theory of correcting residual change in focal length with wavelength is presented for high-harmonic diffractive lenses. The theory is based on a multiple-order diffractive (MOD) lens in combination with a stepped plate called an Arizona total energy color corrector (AZTECC) lens. Results indicate that best performance in terms of on-axis focused irradiance versus wavelength is found when low-dispersion glass is used for the AZTECC lens. A single-order diffractive Fresnel lens (DFL) in combination with the AZTECC lens makes the system achromatic over a wide bandwidth.

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