| 单词 | right-angle prism |
| 释义 | > as lemmasright-angle prism right-angle prism n. Optics a prism whose cross-section is a right triangle, used for deflecting rays through 90 degrees (if they enter through one of the faces forming the right angle) or 180 degrees (if they enter through the hypotenuse face). ΚΠ 1871 Eng. Mechanic 31 Mar. 42/3 I have also taken photos of the sun with the same telescope, only fixing the right-angle prism..between the object-glass and the terrestrial combination. 1923 C. E. Dull Essent. Mod. Physics xviii. 297 The right-angle prism is more efficient as a reflector than a mirror would be if set in the same position. 1997 G. Smith & D. A. Atchison Eye & Visual Optical Instruments viii. 195 The right-angle prism is used for deviating the beam through 90°. < as lemmas |
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