Fig. 2: Experimental setup for recording a compressed time-reversal matrix.
From: High-throughput volumetric adaptive optical imaging using compressed time-reversal matrix
a Schematic of the experimental setup. BS: beamsplitter, OL: objective lens. A Ti: Sapphire pulsed laser is used as a low-coherence light source. Random speckle patterns produced by a rotating diffuser illuminate a sample. The off-axis holograms between the sample wave and a plane reference wave are recorded by a camera. Optics for reference beam path is omitted for brevity. b Representative E-field amplitude (left) and phase (right) images of the sample wave. The size of each image is 40 × 40 µm2, composed of N = 7744 orthogonal modes. c Sparsely-sampled timed-gated reflection matrix RS reconstructed by a set of M = 700 E-field images. d The matrix SS† obtained from an experimentally measured S by placing a mirror at the sample plane
