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| physical object > artifact > device > instrument > optical device > wavefront modifier > spectrograph dispersing element > Fabry-Perot interferometer > etalon |
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| etalon comparison table | ||
| Subject | is a kind of | has definition |
|---|---|---|
| Fabry-Perot interferometer | spectrograph dispersing element | A device that measures distances and changes of distance very accurately, using the pattern of overlap of waves of light. |
| etalon | Fabry-Perot interferometer | Essentially an optical filter that operates by multiple-beam interference of light reflected and transmitted by a pair of parallel flat reflecting plates. |