Figure 4 | Scientific Reports

Figure 4

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

Figure 4

Speckle reduction in optical imaging. (a) Optical configuration. 1963A test chart was imaged with a scattering film under five 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°, and (f) white light (WL). The intensity line profiles and standard deviation (SD) of the images are shown below. LD: laser diode, L: lens, OD: optical diffuser, SF: scattering film, AF: air force test target, O: objective lens, and CCD: charge coupled device.

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