| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem in which there are cases where a retroreflection sheet is overheated by incident light from the direction in which solar light, for example, is directly incident since the retroreflection sheet condenses incident light incident from the same direction. <P>SOLUTION: A thermal energy recovery device comprises: a fluid layer in which fluid circulates; a pump for circulating the fluid in the fluid layer; a heat exchanger for recovering heat energy from the fluid circulated by the pump; a condensing lens array arranged along a plane; and a spherical reflecting mirror array comprising spherical reflecting mirrors each of which has a center at the position which is different from the curvature center of the lens surface of a condensing lens, corresponding to each condensing lens of the condensing lens array. Incident light incident from the specific direction along an optical axis of the corresponding condensing lens and the spherical reflecting mirror is retroreflected to a specific direction by being transmitted through the fluid layer and the condensing lens array and reflected at the spherical reflecting mirror array. <P>COPYRIGHT: (C)2012,JPO&INPIT |
