Abstract
A digital computer is used with a ray tracing technique to calculate the response of a multihole focusing collimator to a point source of radiation placed anywhere in the object space. The analysis is applicable to a focusing collimator with circular holes and includes both the geometrical contribution to the response and the effects arising from both edge and septum penetration. The results are presented as the solid angle subtended at the point source by the effective exit pupil of the collimator and may be calculated as a function of the linear absorption coefficient of the collimator material. The responses for a single taper hole collimator and for a series of seven-hole collimators differing from each other only in septum thickness, each hole again having the same dimensions as the 2107, are calculated.
Published Version
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