Patent ID: 6627891
Filing Date: 2003-09-30
Classification: G01T

Abstract:
A temporal dosimeter, comprising in combination:(a) a sensor for recording dosages of ionizing radiation, said sensor comprising a first side and a second side; (b) a rotatable first radiation shield comprising a shield portion for shielding a major portion of said first side of said sensor from ionizing radiation and at least one aperture portion for unveiling a minor portion of said sensor to ionizing radiation; (c) a rotatable second radiation shield comprising a plurality of apertures configured such that said first rotatable shield and said second rotatable shield together produce a compound aperture for unveiling different portions of said sensor; (d) a third radiation shield for shielding said second side of said sensor; (e) a drive mechanism comprising a rotatable shaft, said shaft being coupled to said rotatable first shield and to said rotatable second shield for rotating said rotatable first shield and said rotatable second shield; (f) a power source for driving said drive mechanism; and (g) a housing for enclosing said sensor, said rotatable first shield and said rotatable second shield, said housing being opaque to visible light but transparent to ionizing radiation.