A study of optical design for the drum projector and its application

This study of optical design for drum projectors includes six projector lenses, which are divided into three flat-imaging lenses and three curved-imaging lenses. This article explores the different optical layout between flat imaging and curved imaging, and the impact of the different number of lenses, the presence or absence of curvature on the imaging surface, and its relationship to the imaging quality. Finally, except for some fields of view, the imaging quality of all designs is very good at a spatial frequency of 32lp/mm. In addition, adding elements to the lens might eliminate many aberrations. In the analysis of curved lenses, the obliquely incident light on the plane can be modified to a vertically incident structure, which also has the dual contribution to the elimination of field curvature. It is concluded that the overall imaging quality of curved lenses is better than that of flat lenses, which is valuable and worth further exploration.