Multilayer diffractive optical element material selection method based
				on transmission, total internal reflection, and thickness

doi:10.1364/ao.465999

Multilayer diffractive optical element material selection method based on transmission, total internal reflection, and thickness

2022-08-24

0

OA

AI

DOI：10.1364/ao.465999

原文链接

原文求助

摘要

En 中文

The polychromatic integral diffraction efficiency (PIDE) metric is generally used to select the most suitable materials for multilayer diffractive optical elements (MLDOEs). However, this method is based on the thin element approximation, which yields inaccurate results in the case of thick diffractive elements such as MLDOEs. We propose a new material selection approach, to the best of our knowledge, based on three metrics: transmission, total internal reflection, and the optical component’s total thickness. This approach, called “geometric optics material selection method” (GO-MSM), is tested in mid-wave and long-wave infrared bands. Finite-difference time-domain is used to study the optical performance (Strehl ratio) of the “optimal” MLDOE combinations obtained with the PIDE metric and the GO-MSM. Only the proposed method can provide MLDOE designs that perform. This study also shows that an MLDOE gap filled with a low index material (air) strongly degrades the image quality.

Multilayer diffractive optical element material selection method based on transmission, total internal reflection, and thickness

摘要

期刊

机构

引用论文