Statistics – Applications
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990luq..rept.....l&link_type=abstract
M.S. Thesis Laval Univ. (Quebec).
Statistics
Applications
Holography, Optical Correction Procedure, Paraboloid Mirrors, Reflecting Telescopes, Aberration, Applications Programs (Computers), Mathematical Models
Scientific paper
The technology of rotating liquid mirrors provides the potential for constructing reflecting telescopes of high optical quality at larger mirror diameters than those currently achievable using solid glass. However, such mirrors can only operate in a fixed position, and if they are used to observe objects off their optical axis, aberration of the image becomes more significant as the distance off the optical axis increases. Without the use of an optical correction device, the image can be degraded to the point where it is useless. It is proposed that a corrector as simple as a holographic optical element can carry out the necessary correction at a fixed angle of incidence. The theory of scalar diffraction of a monochromatic plane wave by a parabolic mirror is presented along with modeling of aberration phenomena at the mirror surface and at the telescope focus. The computer-aided generation of various types of numerical holographic correctors is presented and two are analyzed. Certain characteristics are put forward in evidence which allow expanding of the useful field of view. Computer program listings are included.
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