| 摘要 |
PURPOSE:To obtain a belt-like heating point having a desired length by using a convex lens body of which the top surface is formed to a rectangular plane and the bottom surface is formed to an arc-shaped as a heat condensing means. CONSTITUTION:The convex lens body 1 of which the top surface 2 is formed to the rectangular plane 3 and the bottom surface 4 is formed to the arc-shaped section 5 is used as the heat condensing means. The rectangular plane 3 on the top surface of the semicylindrical convex lens body 1 is made plane perpendicular to the optical axis A-A of the body 1. The length L of the body 1 is made to the required length according to the purposes of use, by which is intended belt-like heating point is obtd. High temp. of about >=1,000 deg.C is obtainable by capturing the solar light heat.
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