Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1985-12-23
1987-09-29
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
350620, G01T 114, H01J 4704
Patent
active
046970843
ABSTRACT:
A single-piece, molded plastic, Cassigrainian-type condenser arrangement is incorporated in a tubular-shaped personal pocket dosimeter of the type which combines an ionization chamber with an optically-read fiber electrometer to provide improved illumination of the electrometer fiber. The condenser routes incoming light from one end of the dosimeter tubular housing around a central axis charging pin assembly and focuses the light at low angles to the axis so that it falls within the acceptance angle of the electrometer fiber objective lens viewed through an eyepiece lens disposed in the opposite end of the dosimeter. This results in improved fiber illumination and fiber image contrast.
REFERENCES:
patent: 3064526 (1962-11-01), Lindsay
patent: 4306154 (1981-12-01), Williams, Jr. et al.
V. V. Novikov, V. K. Baranov, L. V. Vasileva and N. N. Protasov, "Cassegrain System Modified for Solar Concentrators" Appl. Solar Energy, (U.S.A.), vol. 2, No. 5, (Sep.-Oct. 1966), pp. 10-12.
O. G. Landsverk, "A Survey Meter for the Measurement of Alpha, Beta, and Gamma Rays, Fast and Slow Neutrons", U.S. Atomic Energy Commission No. MDDC-396 (declassified Oct. 28, 1946), pp. 1-11.
Breeden David E.
Hamel Stephen D.
Hannaher Constantine
Hightower Judson R.
Howell Janice A.
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