Radiant energy – Radiation controlling means
Patent
1979-05-03
1981-09-08
Anderson, Bruce C.
Radiant energy
Radiation controlling means
250445T, 250503, G02B 500, G21K 100, H01J 152
Patent
active
042886970
ABSTRACT:
A collimator (21, 38, 38A) transmits intercepted X rays or the like along an array of predetermined spaced apart paths (22, 22A), which may be parallel or convergent, while absorbing intercepted radiation which is traveling in other directions. A laminated construction of the collimator provides for an extremely large number of very minute and closely spaced radiation passages (42, 42A) which may have a noncircular cross section to increase transmissivity. The laminated construction also reduces the amount of heavy and sometimes costly radiation absorbent material required in the collimator, enables precise control of the transmitted radiation paths and facilitates the establishing of a desired focal point for the paths. Photoetching techniques, including optical image reduction, are used in the manufacture of the collimator laminations. In some variations of the method, the radiation absorbent material is plated onto the laminations.
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