Abstract

Inherent strong lateral and longitudinal chromatic dispersion of a transmission resonance domain off-axis diffractive lens were studied theoretically and experimentally. It is shown that a 4 mm diameter and 0.14 NA diffractive lens provides both focusing and dispersion with a spectral resolution of up to 0.09 nm, which is suitable for laser line spectral measurements. Experimental results for measured spectra of a mercury–argon source, a helium–neon laser, and RGB laser diodes pave a technological path to compact spectral sensors and microspectrometers.

© 2015 Optical Society of America

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