| 摘要 |
PURPOSE: To concentrate beams to one point in a prescribed distance by a device which can easily be manufactured and used by arranging at least three cylindrical convex mirrors in proper relation. CONSTITUTION: This mirror system is provided with at least three cylindrical convex mirrors M1, M2, and M3. The recessed part of the first mirror M1 is arranged toward the second mirror M2, and planes limited by the straight parts of the two mirrors M1 and M2 are made vertical to each other. Moreover, the recessed part of the third mirror M3 is arranged toward the second mirror M2, and planes limited by the two straight parts of the two mirrors M3 and M2 are made vertical to each other. Moreover, the first mirror M1 and the third mirror M3 are symmetrically arranged to the second mirror M2.
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