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(a) Test setup for measuring distance variation. (b1–g1) One hundred averaged 50 ms custom sensor images taken at increasing distance from 0.65 mm to 1.8 mm in 0.25 mm intervals. The maximum SNR in each image is noted. (b2–g2) Normalized versions of the images to more clearly visualize the degradation in imaging resolution with increasing distance. (h) 1 s integration time microscope image for reference.
