19 July 1976 Adaptive Optics For Space Telescopes
Author Affiliations +
Proceedings Volume 0075, Imaging Through the Atmosphere; (1976) https://doi.org/10.1117/12.954747
Event: 1976 SPIE/SPSE Technical Symposium East, 1976, Reston, United States
Adaptive optics systems for ground-based imaging through the earth's atmosphere must generally measure and correct for path distortions within a time period ranging from 0.5 to 10 milliseconds. For most astronomical objects, this requires a wavefront error sensor of the highest sensitivity -- typically a system which employs hundreds of quantum-limited photodetectors devoted exclusively to this task. This paper will point out how the system problems for figure control of orbiting telescopes are quite different since the error sources have periods which typically range from hours to years. Thus error signal integration times can be thousands of times larger for the orbiting optics, and it is feasible and economically advantageous to use low sensitivity dither adaptive optics systems, employing single detectors at the image plane. We will compare three classes of dither systems for this application: 1) one-element-at-a-time step systems; 2) half-at-a-time step systems; and 3) parallel sinusoidal dither (multidither) systems. Several types of signal processing will be compared from a signal-to-noise viewpoint. Computer simulations will be employed to illustrate the system performance at marginal signal-to-noise ratios.
© (1976) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. R. O' Meara, T. R. O' Meara, C. J. Swigert, C. J. Swigert, W. P. Brown, W. P. Brown, } "Adaptive Optics For Space Telescopes", Proc. SPIE 0075, Imaging Through the Atmosphere, (19 July 1976); doi: 10.1117/12.954747; https://doi.org/10.1117/12.954747


A Near Infrared Astronomical Adaptive Optics System
Proceedings of SPIE (September 19 1989)
Design of the 6.5 m MMT Adaptive Optics System and...
Proceedings of SPIE (March 20 1997)
SAAO adaptive optics system
Proceedings of SPIE (May 03 2000)
GRACE a controlled environment for adaptive optics at the...
Proceedings of SPIE (October 24 2004)
ESO adaptive optics facility progress report
Proceedings of SPIE (September 12 2012)

Back to Top