Device for adjusting the value of chromatic aberrations of an optical system and comprising the application of such a device for the adjusting of the color television cameras using a diascope

摘要

These device and method for adjusting the value of the chromatism and distortion aberrations in an optical system, notably for color television cameras, by using a diascope from which a color image is injected into the optical system, comprises an assembly of at least four prismatic blades forming two optically parallel groups of variable thickness, each group comprising two such blades, the blades consisting of transparent materials having the same index of refraction and the same index of dispersion of the blades of the same group, but a different index of dispersion for each group, with control means for varying the thickness of each group while preserving a constant total thickness.