Physics – Optics
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..660v&link_type=abstract
Astronomicheskii Zhurnal, vol. 53, May-June 1976, p. 660-670. In Russian.
Physics
Optics
1
Optical Equipment, Optical Properties, Paraboloid Mirrors, Telescopes, Aberration, Diaphragms, Diffraction, Laplace Transformation, Mechanical Properties, Optical Correction Procedure, Surface Properties, Wave Fronts
Scientific paper
Conditions are analyzed which limit the applicability of Hartmann's (1904) method for studying the optics of astronomical mirrors. The principle of this method is reviewed, its quality is evaluated, and three of the most important factors limiting its application are examined. It is shown that: (1) diffraction at the diaphragm apertures and the diaphragm's mechanical stability place upper and lower limits on the aperture diameters and the distance between their centers; (2) the lower limit on the total number of apertures is determined by the precision which must be developed for obtaining results of specified reliability; and (3) an adequate description of an optical element's surface is limited by the degree of surface smoothness.
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