Hartmann-Shack sensor

A Hartmann-Shack sensor is a device used to measure how light waves are distorted as they pass through or reflect off an object. It consists of a grid of tiny lenses that focus incoming light onto a detector. By analyzing the pattern of focused spots, the sensor determines how the wavefront of light is bent or irregular. This information helps in correcting distortions, such as in improving vision correction or designing better optical systems. Essentially, it acts like a detailed map of how light is shaped, enabling precise adjustments for clearer images or better optical performance.