G - Physics – 01 – J
Patent
G - Physics
01
J
G01J 1/42 (2006.01) G01J 5/34 (2006.01)
Patent
CA 2149255
A radiation detector has a film-like pyroelectric element which has a fan shape, and two support plates which are made of an electrical and thermal insulating resin and adhered to the both ends elongating from the pivot of the fan shape to the peripheral portion. After a radiation absorbing layer is attached to one face of the pyroelectric element, the resin plates are adhered to each other so that the layer is positioned inside and the pyroelectric element is formed into a conic shape, thereby forming a conic portion. Radiation entering an opening of the bottom face of the conic portion is absorbed by the layer in the form of heat. The temperature rise is converted by the pyroelectric element into an electric signal, thereby detecting the energy amount of the radiation. A reflected component of radiation entering the layer again enters the layer. Since the input radiation is repeatedly reflected and absorbed by the layer, the radiation is essentially 100% absorbed and detected irrespective of its wavelength.
Nakagawa Yasuo
Okubo Kazuaki
Borden Ladner Gervais Llp
Matsushita Electric Industrial Co. Ltd.
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