1. A pyramid wavefront sensor with no dynamic modulation
- Author
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Elise Vernet, Roberto Ragazzoni, and Emiliano Diolaiti
- Subjects
Physics ,Field (physics) ,Plane (geometry) ,business.industry ,Exit pupil ,Astrophysics::Instrumentation and Methods for Astrophysics ,Wavefront sensor ,Atomic and Molecular Physics, and Optics ,Electronic, Optical and Magnetic Materials ,law.invention ,Telescope ,Optics ,Dynamic modulation ,law ,Pyramid ,Electrical and Electronic Engineering ,Physical and Theoretical Chemistry ,business ,Adaptive optics - Abstract
The pyramid wavefront sensor has been introduced in the field of astronomical adaptive optics a few years ago. An important issue characterizing this wavefront sensor is how to reach high dynamical range, a task realized so far by either vibrating the pyramid or oscillating a tip-tilt mirror in a plane conjugated to the exit pupil of the telescope. A new method is proposed here to achieve the same result, without any moving part: the new approach is based on a light diffusing plate placed in an intermediate pupil plane. Some practical implementations of this concept are presented and the relevance to multi-conjugate adaptive optics is discussed.
- Published
- 2002
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