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Achromatic telescope


The achromatic telescope is a refracting telescope that uses an achromatic lens to correct for chromatic aberration.

  • also known as 消色差望遠鏡

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Google previewThe London encyclopaedia (1829)

or Universal dictionary of science, art, literature, and practical mechanics, comprising a popular view of the present state of knowledge

The calculation of an achromatic object- glass, and in general that of every achromatic telescope, requires a precise knowledge of the ratio of the sines of incidence and refraction, and of the ratio of dispersion of the different kinds of glass which are used in the composition of telescopes. The methods hitherto employed for measuring these ratios have given Results differing considerably from each other, in spite of the care and accuracy employed in the computation. We ought ...

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