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physical object > artifact > device > instrument > optical device > wavefront modifier > atmospheric dispersion corrector
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atmospheric dispersion corrector comparison table
Subject has wavefront modification has definition is a kind of
wavefront modifiershape, polarization or wavelengthA device which modifies the wavefront shape, polarization or wavelengthoptical device
atmospheric dispersion correctorwavelengthAn 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

Next wavefront modifierfocal reducer    Upwavefront modifier    Previous wavefront modifieraspheric