optical system

Optical system refers to a system composed of various optical elements such as lenses, mirrors, prisms and diaphragms in a certain order. Usually used for imaging or optical information processing. An optical system composed of two or more refracting (or reflecting) spherical surfaces with the center of curvature on the same line is called a coaxial spherical system, and the line where the center of curvature is located is called the optical axis.
In addition to considering Gaussian optics related issues in an optical system, such as the conjugate position of the object image, magnification, image transfer and refraction optical path, etc., it also needs to consider the size of the imaging range, the size of the imaging beam aperture angle, the width of the imaging band, and A series of problems such as clarity and illumination. The actual optical system that meets a series of requirements is often not a simple combination of several lenses, but consists of a series of lenses, curved mirrors, plane mirrors, reflective prisms, and reticles and other optical parts. Means of finely correcting aberrations and properly dimensioning the lateral dimensions of the optical components are required to obtain the desired high quality system.