| 摘要 |
The window is used in civil works of residential, administrative, production and other buildings. It reduces the metal consumption up to 50%. By making use of light reflecting capacities of light concentrator built in it the premise is being additionally lighted thus reducing electric power consumption. The window includes a case (3, 4) and frame (5) connected to it. Between the fixed window pane (6) fitted on the case (3, 4) and the pane (7) on the openable frame (5) there is a seat (8) for fitting a concentrator (1) with a profiled surface. Another concentrator (2) is mounted between the two window panes (6, 7). Concentrators (1 & 2) are made with concave and projected surfaces, the formers covered by a light-absorpiton coating, and the latter with light reflecting one. 5 claims, 3 figures
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