Patent ID: 7999218
Filing Date: 2011-08-16
Classification: G01T

Abstract:
1. A radiation detector comprising: a radiation detecting unit including a radiation sensor comprising a single element adapted to directly convert radiation into an electric signal, the radiation sensor being capable of sensing light, the radiation detecting unit further including a signal amplifier, a pulse-height discriminator, and a counter; an optical pulse emitting unit configured to emit an optical pulse for confirming operational integrity of the radiation detecting unit; an emission controlling unit configured to control an operation of the optical pulse emitting unit; a light path through which light is led from the optical pulse emitting unit to a vicinity of the radiation sensor; a circuit board to which the radiation sensor is attached; and a filter provided around the circuit board and configured to adjust response characteristics of radiation impinging on the filter and thereby producing filtered radiation and flattening the response of the radiation sensor, wherein the emission controlling unit includes a mechanism for adjusting emission time characteristics of the optical pulse emitting unit, and the radiation detecting unit is utilized to confirm a normal operation of the radiation detecting unit by having the optical pulse emitting unit inputting light to the radiation sensor, and wherein the filter is configured to adjust the response characteristics of the radiation impinging on the filter, to a form suitable for units of radiation to be measured by the radiation sensor that senses and directly converts the filtered radiation that has been filtered by the filter, wherein the filter is formed with a groove along which the light path is provided.