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Evolutionary timescales of AO-produced speckles at NIR wavelengths
2016
Adaptive Optics Systems V
We present measurements of the evolutionary timescales of speckles around adaptive optics-corrected PSFs. We placed a SELEX SAPHIRA HgCdTe detector behind the SCExAO instrument at Subaru Telescope. We analyzed the behavior of speckles at radial distances of 2-8 λ/D away from the diffraction-limited PSF in H-band (∼1.6µm) images collected at ∼1 kHz framerates. Speckles evolve with a variety of timescales, and these have not previously been studied at near-infrared wavelengths. Ultimately we
doi:10.1117/12.2231926
fatcat:ztm3gap4vvf4zc5zn3i32ah5sa