Performance Study of Integrated Coronograph - Adaptive Optics Designs

Details Performance Study of Integrated Coronograph - Adaptive Optics Designs Performance Study of Integrated Coronograph - Adaptive Optics Designs

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007lyot.confe..28p&link_type=abstract

Proceedings of the conference In the Spirit of Bernard Lyot: The Direct Detection of Planets and Circumstellar Disks in the 21s

Computer Science

Performance

Scientific paper

Direct imaging of exo-planets requires that an efficient starlight suppression system and wavefront compensator work together to achieve a stable null with sufficient contrast. The performances of several configurations for these two sub-systems have been extensively studied over the past few years, with particular attention being payed to the following four quantities and their relationship: throughput, contrast level, inner working angle and bandwidth. In this paper we propose a new approach that considers starlight suppression and wavefront correction as a unique integrated component that is the combination of a shaped-pupil and two sequential deformable mirrors that operate simultaneously as a short stroke pupil mapping device and a wavefront compensator. To do so we first develop a new method based on Huygens wavelets to explain the contrast limits of pupil mapping due to propagation, and study the hybrid associations of PIAA systems and shaped pupils that have been introduced in order to mitigate these effects. Since two cascaded deformable mirrors are, in principal, a wavelength independent amplitude actuator, we argue that they could be used in conjunction with shaped pupils to carry some of the apodisation load and thus increase the throughput of the new hybrid system. Finally we will present a full performance analysis of several hybrid designs and illustrate how the four aforementioned performance metrics are related, in order to ultimately highlight the tradeoffs underlying the decision to be made among these various designs.

Affiliated with

Also associated with

No associations

Rating

Performance Study of Integrated Coronograph - Adaptive Optics Designs 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 Performance Study of Integrated Coronograph - Adaptive Optics Designs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Performance Study of Integrated Coronograph - Adaptive Optics Designs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-883497