Design and manufacture of a large-aperture wavefront sensor

Details Design and manufacture of a large-aperture wavefront sensor Design and manufacture of a large-aperture wavefront sensor

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5553..237h&link_type=abstract

Advanced Wavefront Control: Methods, Devices, and Applications II. Edited by Gonglewski, John D.; Gruneisen, Mark T.; Giles, Mi

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A compact, low-cost wavefront sensor has been demonstrated to measure dynamic disturbances in 1-3 m diameter optical systems. With 448 subapertures and 4 KHz frame rate, it can measure disturbances up to 2 KHz at a level of 1/3800 waves rms at 0.65 μm. It also has a linear dynamic range of 3 X 106:1 for ease of alignment. The principles of operation and test data are presented for the subaperture sensors (called NanoTrackers), which are lateral shearing interferometers capable of measuring tilt to 1.7 nanoradians rms at 8 µW of input power as well as phasing for segmented optical systems to 75 picometers rms (at 4 KHz).

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