Testing of a transmission-filter coronagraph for ground-based imaging of exoplanets

Details Testing of a transmission-filter coronagraph for ground-based imaging of exoplanets Testing of a transmission-filter coronagraph for ground-based imaging of exoplanets

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7735e.273d&link_type=abstract

Ground-based and Airborne Instrumentation for Astronomy III. Edited by McLean, Ian S.; Ramsay, Suzanne K.; Takami, Hideki. Pro

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the latest laboratory test of a new coronagraph using one step-transmission filter at the visible wavelength. The primary goal of this work is to test the feasibility and stability of the coronagraph, which is designed for the ground-based telescope especially with a central obstruction and spider structures. The transmission filter is circular symmetrically coated with inconel film on one surface and manufactured with a precisely position-controlled physical mask during the coating procedure. At first, the transmission tolerance of the filter is controlled within 5% for each circular step. The target contrast of the coronagraph is set to be 10-5~10-7 at an inner working angle around 5λ/D. Based on the high-contrast imaging test-bed in the laboratory, the point spread function image of the coronagraph is obtained and it has delivered a contrast better than 10-6 at 5λ/D. As a follow-up effort, the transmission error should be controlled in 2% and the transmission for such filter will be optimized in the near infrared wavelength, which should deliver better performances. Finally, it is shown that the transmission-filter coronagraph is a promising technique to be used for the direct imaging of exoplanets from the ground.

Affiliated with

Also associated with

No associations

Rating

Testing of a transmission-filter coronagraph for ground-based imaging of exoplanets 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 Testing of a transmission-filter coronagraph for ground-based imaging of exoplanets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Testing of a transmission-filter coronagraph for ground-based imaging of exoplanets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1382194