Use this URL to cite or link to this record in EThOS:
Title: An adaptive optics system for astronomical image sharpening
Author: Doel, A. P.
ISNI:       0000 0001 3427 186X
Awarding Body: Durham University
Current Institution: Durham University
Date of Award: 1990
Availability of Full Text:
Access from EThOS:
Access from Institution:
Images of stars in the focal plane of large astronomical telescopes are many times larger than the images expected from diffraction theory. Much of this blurring of the image is due to variations in the optical properties of the atmosphere above the observatory which for small aperture telescopes causes motion of the image, and for large aperture telescopes causes the image to break up into a number of smaller sub-images. This thesis describes a prototype adaptive system which is designed to sharpen astronomical images in real-time. The sharpening is achieved by removing the atmospherically induced motions of the image with servo-looped plane mirrors driven by piezo-electric actuators. The results of real-time sharpening obtained with the adaptive system at the William Herschel Telescope (WET) are presented along with the results of an investigation into the characteristics of the atmospheric limitations at the La Palma observatory site.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Optics & masers & lasers