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| physical object > artifact > device > instrument > optical device > wavefront modifier > mirror > adaptive optics | 
| adaptive optics comparison table | ||
| Subject | is a kind of | has definition | 
|---|---|---|
| mirror | wavefront modifier | |
| adaptive optics | mirror | Compensating for atmospheric distortions in a wavefront by high-speed changes in the shape of a small, thin mirror. | 
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