Optimized modal tomography in adaptive optics

Letter to the Editor Modal tomography for adaptive optics

Multiple Laser Guide Stars can be used to retrieve the three–dimensional distribution of the perturbing layers on the coming wavefront in Adaptive Optics system and to derive corrections for conical anisoplanatism. We outline the basic analytical details of a modal approach to this problem. The advantages of this approach with respect to the traditional zonal one are pointed out along with a pr...

Solar tomography adaptive optics.

Conventional solar adaptive optics uses one deformable mirror (DM) and one guide star for wave-front sensing, which seriously limits high-resolution imaging over a large field of view (FOV). Recent progress toward multiconjugate adaptive optics indicates that atmosphere turbulence induced wave-front distortion at different altitudes can be reconstructed by using multiple guide stars. To maximiz...

Multi-modal adaptive optics system including fundus photography and optical coherence tomography for the clinical setting

We present a new compact multi-modal imaging prototype that combines an adaptive optics (AO) fundus camera with AO-optical coherence tomography (OCT) in a single instrument. The prototype allows acquiring AO fundus images with a field of view of 4°x4° and with a frame rate of 10fps. The exposure time of a single image is 10 ms. The short exposure time results in nearly motion artifact-free high...

Adaptive Optics for Optical Coherence Tomography

Frequency based design of modal controllers for adaptive optics systems.

This paper addresses the problem of reducing the effects of wavefront distortions in ground-based telescopes within a "Modal-Control" framework. The proposed approach allows the designer to optimize the Youla parameter of a given modal controller with respect to a relevant adaptive optics performance criterion defined on a "sampled" frequency domain. This feature makes it possible to use turbul...