| 摘要 |
The radiation unit (1) is insulated on the surfaces which do not face the reflector (2), and is heated by an electrical element in the form of a surface-resistive foil. Apart from the main reflector, a further such unit (5) is located in the radiation path The second reflector is flat and is so positioned that, e.g., where shooting practice is taking place towards the infra-red radiation unit, the latter and the first reflector can be placed in a protective location, with only the second reflector in the line of fire. Both reflectors, being subject to firing damage in military applications, are made of cheap material, such as metal foil-lined cardboard. On the radiation unit is a temp. indicator which via a cable gives an actual value to a regulator connected to a control appts. for energy feed to the infra-red radiation unit. |
