Radiant energy – Invisible radiant energy responsive electric signalling – With heating of luminophors
Reexamination Certificate
2004-12-20
2008-09-16
Porta, David P. (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
With heating of luminophors
Reexamination Certificate
active
07425705
ABSTRACT:
A TLD reader system has a laser diode that heats a thermoluminescent material causing a hemispherical photon emission that is collected by a ball lens. A filter ensures the ball lens receives and collects a predetermined transmittance value of the photons emitted within a predetermined range of wavelength. The ball lens sends the collected photons via a fiber-optic connection to a detection module. An infrared sensor senses the temperature and monitors the heating profile of the thermoluminescent material. A computer-controlled feedback loop maintains a constant output power from the laser diode.
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Flournoy James T.
Harris, Jr. William S.
Gray Michael K.
Malevic Djura
Porta David P.
The United States of America as represented by the Secretary of
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