Cassegrainian/Gregorian-type null correctors for surface measurements of radio telescope reflectors.
The (sub)millimeter wavelength radio observatory of the next generation will probably be an interferometer array of some 50 telescopes with parabolic reflectors 10-15 m in diameter. At this scale of mass production it is convenient to have at hand for workshop assembly a reflector surface measurement technique that is precise and easy to operate. We discuss the possibility of reflector measurements based on 10.6-microm CO2 laser interferometry using Cassegrainian/Gregorian-type null correctors.
Greve
A
A
Institut de Radio Astronomie Millimetrique, 300 Rue de la Piscine, Domaine Universitaire de Grenoble, 38406 St. Martin d'Heres, France.