CASOAR: an infrared active wavefront sensor for atmospheric turbulence analysis

Jean-Pierre Cariou; Agnes Dolfi-Bouteyre

doi:10.1117/12.138522

17 December 1992 CASOAR: an infrared active wave front sensor for atmospheric turbulence analysis

Jean-Pierre Cariou, Agnes Dolfi-Bouteyre

Proceedings Volume 1714, Lidar for Remote Sensing; (1992) https://doi.org/10.1117/12.138522
Event: Environmental Sensing '92, 1992, Berlin, Germany

Abstract

Knowledge of deformation of every point of a wave front over time allows statistical turbulence parameters to be analyzed, and the definition of real time adaptive optics to be designed. An optical instrumentation was built to meet this need. Integrated in a compact enclosure for experiments on outdoor sites, the CASOAR allows the deformations of a wave front to be measured rapidly (100 Hz) and with accuracy (1 deg). The CASOAR is an active system: it includes its own light source (CW CO2 laser), making it self-contained, self-aligned and insensitive to spurious light rays. After being reflected off a mirror located beyond the atmospheric layer to be analyzed (range of several kilometers), the beam is received and detected by coherent mixing. Electronic phase is converted in optical phase and recorded or displayed in real time on a monitor. Experimental results are shown, pointing out the capabilities of this device.

Citation Download Citation

Jean-Pierre Cariou and Agnes Dolfi-Bouteyre "CASOAR: an infrared active wave front sensor for atmospheric turbulence analysis", Proc. SPIE 1714, Lidar for Remote Sensing, (17 December 1992); https://doi.org/10.1117/12.138522

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available