Optical System Design Of Sightseeing Telescope Which Has Large Aperture And Large Magnification

Aim at the requirement of can observe people or scenery at ten kilometers, a large aperture and large magnification sight-seeing telescope system is developed.In order to achieve the large aperture and the large magnification, by use of the relationships between wave disparity and spherical aberration, and wavefront chromatic aberration and chromatic difference of focal length, the equations of solving original structure for the apochromatic objective, the satisfied structural parameters of the three color achromats are acquired quickly. And the normalized coefficient L of longitudinal chromatic aberration and normalized coefficient S of secondary spectrum of optical materials are introduced. With the help of the instructive S-L chart, suitable optical materials for the design of apochromatic system can be selected effectively.The targets that the sight-seeing telescope attained are: magnification is fifty times, focal length of objective lens is one hundred millimeters, apparent field angel is 0.46 degree, second order spectrum of the whole optical system achieve 0.0001millimeter.At the same time, by compute the position and the dimension of reversed image prism, and consider the problem of converse or plus of the image, we edit a POB file, import a leman roof prism into ZEMAX program, synthesis consider with the objective lens to achieve apochromatic.