Design of achromatic diffractive lenses

Area of Science:

• Optics and Photonics
• Optical Engineering

Background:

• Diffractive lenses offer advantages in thinness and weight.
• Traditional diffractive lenses suffer from chromatic aberration and limited wavelength range.
• Achromatic diffractive lenses are emerging as a promising solution.

Purpose of the Study:

• To compare methods for optimizing diffractive lens profiles for Strehl ratio and efficiency.
• To investigate how lens design performance approaches theoretical limits.
• To provide guidelines for expected Strehl ratio and efficiency.

Main Methods:

• Comparative analysis of lens profiling strategies.
• Investigation of theoretical performance limits for diffractive lens designs.
• Development of simple rules and approximate guidelines for performance prediction.

Main Results:

• Established methods for optimizing Strehl ratio and efficiency in achromatic diffractive lenses.
• Quantified the proximity of designed lens performance to theoretical limits.
• Provided simple rules and guidelines for predicting lens performance under specific conditions.
• Identified reasons for overestimated efficiencies in previous studies, such as unaddressed scattered radiation and inadequate radial sampling.

Conclusions:

• The study provides a framework for designing high-performance achromatic diffractive lenses.
• Guidelines are offered to help researchers achieve optimal Strehl ratio and efficiency.
• Clarification is provided on credible efficiency benchmarks, addressing common overestimations in the field.