Figure 6 | Scientific Reports

Figure 6

From: High-brightness laser imaging with tunable speckle reduction enabled by electroactive micro-optic diffusers

Figure 6

Coherent interferometric phase imaging with speckle reduction. (a) Optical system for off-axis common-path QPI with speckle reduction. 1963A US AF test chart was imaged after a biologically relevant scattering film under four different illuminations, (b) a CW laser, (c) a CW laser, with a static diffuser (SD) and moving diffuser (MD) in the illumination path with a diffusion angle (DA) of 1°, (d) a CW laser, SD/MD, DA = 6°, and (e) a CW laser, SD/MD, DA = 12°. Reconstructed optical phase maps of the cropped areas are shown below. LD: laser diode, L: lens, OD: optical diffuser, SF: scattering film, AF: air force test chart, O: objective lens, HWP: half wave plate, WP: Wollaston prism, P: polarizer, and CCD: charge coupled device.

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