New method of measuring the shape of precise antenna reflectors

Details New method of measuring the shape of precise antenna reflectors New method of measuring the shape of precise antenna reflectors

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976rsci...47...50p&link_type=abstract

Review of Scientific Instruments, vol. 47, Jan. 1976, p. 50-55.

Computer Science

8

Mechanical Measurement, Parabolic Reflectors, Radio Antennas, Surface Geometry, Computer Techniques, Curvature, Curve Fitting, Error Analysis, Measuring Instruments, Random Errors, Telescopes

Scientific paper

The shape of the paraboloidal reflector surface is determined by making a large number of measurements of the reflector curvature along several radii of the surface. These measures of curvature are then integrated twice to give the reflector profile along each radius; the results from several radii then allow the reflector surface shape to be mapped in three dimensions. The curvature measurements are made by a three-wheeled cart with a depth sensor resting on the surface at the midpoint of the wheels. Tests of the method on an 11 m diam antenna show an average repeatability of 0.037 mm in the measurement of the shape of the parabolic reflector.

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