Abstract
For the problem about the design of large fieldofview(FOV) projection lens，a projection lens with large FOV was designed with ZEMAX through limiting the basic parameters and dimensions of the lens by various operating parameters. The optimization process was carried on by using lens frame. The main optical parameters are such that the focal length is 13.6 mm，the full FOV is 60°，the relative aperture is 1/1.6. From the result we can see that the absolute value of maximum distortion of full field lens is less than 3%，the maximum field curve is less than 0.06 mm，the modulation transfer function( MTF) of the whole FOV at 50 lp/mm is greater than 0.6,which is very closed to diffraction limit. The designed optical system is composed of 10 pieces of spherical lenses and has the advantages of compact structure and easy processing.
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