| 单词 | retrodirective mirror |
| 释义 | retrodirective mirror [¦re·tro·di`rek·tiv `mir·ǝr] OPTICS 1. An optical system consisting of two mutually perpendicular plane mirrors; it reflects any beam of light which lies in a plane perpendicular to the mirrors into a direction antiparallel to its original direction. 2. An optical system consisting of three mutually perpendicular plane mirrors; it reflects any beam of light into a direction antiparallel to its original direction. |
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