Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1990-03-13
1992-01-07
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036309, G01T 1208
Patent
active
050794248
ABSTRACT:
A standard light beam is incident on a photomultiplier tube (PMT) to adjust the gain of a preamplifier which serves to amplify the output signal of the PMT. A light-emitting diode which produces a standard light beam is fixed to the glass tube of the PMT by means of an attachment made of transparent resin. The standard light beam can therefore pass through the attachment. The light transmitting efficiency of the attachment is improved such that an ample quantity of the standard light beam can be supplied to the light-receiving face of the PMT. Even when the angle that the diode is attached to the glass tube is changed, the transmission of the standard light beam is not disturbed by the attachment, thereby enabling the quantity of the standard light beam supplied to the light-receiving face to remain substantially constant. Thus, gain adjustment can be accurately attained.
REFERENCES:
patent: 4220851 (1980-09-01), Whatley
patent: 4346590 (1982-08-01), Brown
patent: 4904865 (1990-02-01), Meisner et al.
Belle, Volchok, Korovin, "A Four-Channel System for Stabilizing a Scintillation Gamma-Spectrometric Installation," Translated from Pribory i Tekhnika Eksperimenta, No. 5, pp. 82-84, Sep.-Oct. 1974.
Beyer James E.
Fields Carolyn E.
Kabushiki Kaisha Toshiba
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