Fraunhofer diffraction

Interference of light using parallel light.

The diffraction theory explained by the other Fraunhofer actually serves as the fundamental theory for the particle size distribution measurement device using laser diffraction, which will be discussed later. In a very rough classification to distinguish it from Fresnel diffraction: - Fresnel diffraction occurs when both the light source and the observation point are close to the aperture where diffraction occurs. - Fraunhofer diffraction occurs when both the light source and the observation point are infinitely far from the aperture where diffraction occurs. The Fraunhofer diffraction phenomenon can be mathematically expressed more simply compared to Fresnel diffraction. For experts in optics, this may seem like a rough development akin to being struck by lightning, but for those who are eager to understand the reason behind the formation of fringes, I strongly recommend reading the reference materials on light provided in the appendix. *For more details, please refer to the related links or feel free to contact us.*

Other measuring instruments