Extended Data Fig. 1: Triple-input PS (TRIPS) OCT. | Nature Biomedical Engineering

Extended Data Fig. 1: Triple-input PS (TRIPS) OCT.

From: Posterior scleral birefringence measured by triple-input polarization-sensitive imaging as a biomarker of myopia progression

Extended Data Fig. 1

a, TRIPS-OCT system schematic. Briefly, compared to a conventional OCT system that records only the intensity of the light, the polarization states of light are additionally recorded by a polarization diversity detection circuit (BS, PBSs, D1, D2). The triple-state modulator was inserted into the sample arm. b, Triple-state modulator. The modulator comprises a polarizer and an EOM. c, EOM modulation scheme. The EOM is driven by a triple-step voltage to produce three retardance values, −120°, 0°, and 120°. d, Polarizer axis configuration. The angle between the linear polarizer preceding the EOM and the optic axis of the EOM is set as 27.37°. e, Mutually orthogonal polarization states on the Poincaré sphere resulting from triple-state modulation. FC, Fibre coupler. P1-2, Polarizer. A, Motorized aperture. C1-2, Circulator. PBS, Polarizing beam splitter. BS, Nonpolarizing beam splitter. SG, Scanning galvo mirrors. EOM, Electro-optic modulator. M, Mirror. D1-2, Photodetector.

Back to article page