| 摘要 |
PROBLEM TO BE SOLVED: To simultaneously solve a problem in leading luminous flux with a large conical angle of sunlight converging on a heat storing and insulating furnace, into the inner part of the furnace in which an object to be irradiated with sunlight is inserted, and a structural defect characteristic of a reflector optical system, that is, the loss of quantity of light caused by intercepting solar luminous flux incident to the parabolic reflector, by the heat storing and insulating furnace itself in a device related to solar heat utilization of collecting sunlight by the parabolic reflector and utilizing its heat energy. SOLUTION: The parabolic reflector 1 and a convex lens 6 are arranged on the same optical axis placing the heat storing and insulating furnace 8 having an elliptic reflector 4 on an internal wall, in between, and a first focus 3 of the elliptic reflector and a focus 3 of the parabolic reflector are made coincident to lead the focus into a second focus 5 of the elliptic reflector at the inner part of the heat storing and insulating furnace. The convex lens 6 is used to compensate the loss of quantity of light due to shielding by the heat storing and insulating furnace 8, and its focus is made coincident with the second focus 5 of the elliptic reflector to solve the problem. COPYRIGHT: (C)2007,JPO&INPIT
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