Simulations of coronagraphy with a dynamic hologram for the direct detection of exo-planets

Details Simulations of coronagraphy with a dynamic hologram for the direct detection of exo-planets Simulations of coronagraphy with a dynamic hologram for the direct detection of exo-planets

2010-09-22

arxiv.org/abs/1009.4381v1

2010SPIE.7731E.158R

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

5 pages, 6 figures

Scientific paper

10.1117/12.861756

In a previous paper, we discussed an original solution to improve the performances of coronagraphs by adding, in the optical scheme, an adaptive hologram removing most of the residual speckle starlight. In our simulations, the detection limit in the flux ratio between a host star and a very near planet (5 lambda/D) improves over a factor 1000 (resp. 10000) when equipped with a hologram for cases of wavefront bumpiness imperfections of lambda/20 (resp. lambda/100). We derive, in this paper, the transmission accuracy required on the hologram pixels to achieve such goals. We show that preliminary tests could be performed on the basis of existing technologies.

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