Reduced mass flying spot scanner having arcuate scanning lines

Details Reduced mass flying spot scanner having arcuate scanning lines Reduced mass flying spot scanner having arcuate scanning lines

1991-09-12

1993-06-29

Porta, David P.

X-ray or gamma ray systems or devices

Beam control

Scanner

378 57, 378 86, 378 87, 378147, 378156, G21K 510

Patent

active

052241440

ABSTRACT:
A method and apparatus for creating image information for objects inspect with penetrating radiation which utilizes a flying spot scanner of reduced mass. Objects are scanned with penetrating radiation along curved scan lines. The flying spot scanner which effects such scanning has a stationary absorber plate having a fixed slit in it which is curved, as well as a chopper wheel having radially oriented slits. As the chopper wheel rotates, the radially oriented slits traverse the projection of the radiation passing through the fixed slit, and because this slit is curved, the radial slits may be of reduced length, and the chopper wheel may be of reduced mass. The detected radiant energy is divided into pixels, and the pixels are addressed to a utilization means such as a memory or a display in such manner that the pixels which correspond to a scan line of the object define a curved line in the utilization means which has the same shape as the curved scanning line.

REFERENCES:
patent: 4179100 (1979-12-01), Sashin et al.
patent: 5022062 (1991-06-01), Annis

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