基本信息
摘要：869,710. Semi-conductor devices. UNICAM INSTRUMENTS Ltd. Jan. 19, 1960 [Jan. 27, 1959], No. 2978/59. Class 37. A radiation detector has a first electricallyconducting radiationabsorbing film spaced by an insulating sheet from a second electrically-conducting film forming part of a thermocouple or bolometer. Fig. 1 shows a thermocouple which consists of a gold film 4 in contact with welded joints 6, 7 of thermoelectric material and supported by a thin insulating sheet 2. On the other side of the insulating sheet is a radiation-absorbing film of aluminium, gold, nickel, bismuth, selenium or tellurium. The separation of the absorbing film from the thermocouple proper enables the film to have a surface roughness appropriate to the wavelength of the radiation to be absorbed without its thickness, which necessarily becomes large in the case of long wavelengths, affecting the thermal capacity of the thermocouple. Fig. 3 shows a bolometer in which the radiationabsorbing element is a film 13 of gold or nickel evaporated on to a collodion or Formvar (Registered Trade Mark) support. The resistive film 14 on the other side of the insulating support is connected to wire 16 by electrodes 15 formed by metal deposits.
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