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| physical object > artifact > device > instrument > optical device > wavefront modifier > atmospheric dispersion corrector | 
| atmospheric dispersion corrector comparison table | |||
| Subject | has wavefront modification | has definition | is a kind of | 
|---|---|---|---|
| wavefront modifier | shape, polarization or wavelength | A device which modifies the wavefront shape, polarization or wavelength | optical device | 
| atmospheric dispersion corrector | wavelength | An optical device usually comprising two thin prisms which can rotate to compensate for the elongation of a star image caused by the wavelength dependence of the refractive index of air. | wavefront modifier | 
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