Research on Projection System Design Based on DMD Chip
ZHOU He
HONG Zuofei
Abstract：This article focuses on the application of automotive high pixel headlights,and designs two-piece,three piece,and four piece projection lens systems based on a 0.55-inch DMD chip using ZEMAX optical software.Through optimized design,the modulation transfer function of the four piece anti long distance structure at a spatial frequency of 43 lp/mm is greater than 0.6,the optical distortion is only 1.188%,and the total optical length is controlled at 63.1 mm;the MTF of the three piece structure is greater than 0.5,and the distortion is 1.1937%.Tolerance analysis shows that under the same machining and assembly tolerance conditions,there is a 90% probability that the MTF value of the four piece structure is higher than 0.402,indicating the best performance stability;However,the 90% probability MTF value of the two-piece structure is only 0.228,indicating a higher engineering risk.
Keywords：high-pixel headlampDMD chipprojection systemdesign and optimization
Publication Date：2025-11-25
Online Publishing Date：2025-12-15(First online date of this platform, not the publication date of the document)
Pages：6( 39-44 )