Strehl ratioZemax

Wavefront error: The difference between the ideal wavefront of light and the actual wavefront produced by an optical system, contributing to optical aberrations.

strehlratio中文

Modulation transfer function (MTF): A function that describes how well an optical system can reproduce (or transfer) detail from the object to the image at various spatial frequencies.

The Strehl ratio is a measure of the quality of optical imaging systems, defined as the ratio of the peak intensity of an aberrated image to the peak intensity of a perfect image under the same conditions. It serves as an important metric for assessing how well an optical system performs in the presence of aberrations, which can distort images and reduce clarity. A higher Strehl ratio indicates better performance and less distortion, while a lower ratio reflects greater aberrations that can negatively impact image quality.

Optical aberration: A deviation from perfect optical performance, leading to distortions in the image produced by an optical system.