A high-Strehl low-resolution optical imager (BESSEL): a measurement of the inner scale of turbulence

Details A high-Strehl low-resolution optical imager (BESSEL): a measurement of the inner scale of turbulence A high-Strehl low-resolution optical imager (BESSEL): a measurement of the inner scale of turbulence

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7015e.179p&link_type=abstract

Adaptive Optics Systems. Edited by Hubin, Norbert; Max, Claire E.; Wizinowich, Peter L. Proceedings of the SPIE, Volume 7015

Physics

Optics

Scientific paper

We have constructed a high-speed image stabilization system, BESSEL, that is capable of performing wavefront correction at a rate exceeding 1 kHz. BESSEL achieved on-sky Strehl ratios of 98-99% at 800 nm as we approached the inner scale of atmospheric turbulence when the refractor telescope aperture was stopped down to 25.4 mm (~r0/2). This is better than expected from Kolmogorov theory, indicating that at D ~r0/2 we are within the inner scale of turbulence. Utilizing high Strehls and the technique of roll subtraction enabled BESSEL to resolve the binary, ADS 10418AB, with separation of only 0.71 λ/D and a delta magnitude of ~3 mags at 800 nm. BESSEL's capability to produce high Strehls ratios means that the instrument can be used to test the performance of interference/phase coronagraphs on-sky for the first time. Integrated with an optical vortex coronagraph, BESSEL is capable of nulling the first airy ring of Betelgeuse by more then a factor of ten.

Affiliated with

Also associated with

No associations

Rating

A high-Strehl low-resolution optical imager (BESSEL): a measurement of the inner scale of turbulence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A high-Strehl low-resolution optical imager (BESSEL): a measurement of the inner scale of turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A high-Strehl low-resolution optical imager (BESSEL): a measurement of the inner scale of turbulence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-793368