Golay-6孔径阵列的非相干全息部分孔径成像OA

In response to the engineering challenges in the interferenceless coded aperture correlation ho-lography(I-COACH)partial aperture imaging system(PAIS),including uneven modulation transfer function(MTF)distribution of the conventional annular aperture array,mid-frequency information loss,and constrained imaging quality,a partial aperture imaging system integrating the Golay-6 aperture array with I-COACH was proposed.Employing a combined approach of theoretical analysis,numerical simula-tion,and experimental validation,wecompared the frequency response characteristics of the 8-element an-nular aperture array,6-element annular aperture array,and Golay-6 aperture array,and optimized the gen-eration conditions of the coded phase mask(CPM)and parameters of nonlinear reconstruction(NLR).Experimental results demonstrate that the Golay-6 aperture array reduces the system aperture area by 25％,lowers the MTF fluctuation coefficient to 0.137,and minimizes the maximum mid-frequency fluctu-ation amplitude to 0.024,achieving a system signal-to-noise ratio(SNR)of 14.82 dB.For the complex sample of a dragonfly wing,the structural similarity(SSIM)reaches 0.975 with an SNR of 13.5 dB,en-abling clear reconstruction of fine structures.This system enhances mid-frequency modulation capability and image uniformity while preserving high resolution,thereby providing experimental references and methodological support for astronomical partial aperture imaging and high-performance computational opti-cal imaging.