Techniques for locating beams within large area detectors

Details Techniques for locating beams within large area detectors Techniques for locating beams within large area detectors

1982-07-06

1985-01-15

Willis, Davis L.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

250233, G01J 120

Patent

active

044939914

ABSTRACT:
Methods are shown for deducing the point of impingement of a beam, such as particle or electromagnetic beam, on a planar detector which is much larger than the beam cross-section. The methods involve chopping the beam before it reaches the detector by means of a chopper which periodically obscures the field of view of the detector as a known function of the chopper motion, and then determining the point of impingement from output measurements of the detector and from the known geometry of the chopper and the detector.

REFERENCES:
patent: 3177366 (1965-04-01), Larchuk et al.
patent: 3220298 (1965-11-01), Powell et al.
patent: 3944167 (1976-03-01), Figler et al.
patent: 4286760 (1981-09-01), Coudero et al.

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