| 单词 | spider diffraction |
| 释义 | spider diffractionspider diffractionThe characteristic spikes of light in the form of a cross seen in the image formed by a Newtonian reflector. They result from diffraction effects caused by the diagonal supports – the spider – and are additional to the diffraction from the circular edge of an objective lens or a mirror, which converts a star image from a point to an Airy disk in refractors and reflectors. |
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