The practical astronomer : comprising illustrations of light and colours, practical descriptions of all kinds of telescopes, the use of the equatorial-transit, circular, and other astronomical instruments, a particular account of the Earl of Rosse's large telescopes, and other topics connected with astronomy (1845)
Dick, Thomas, 1774-1857 · London : Seeley, Burnside, and Seeley · leaf 374
nlarged scale, isthat which the pair of lenses CD at the eye-endrender visible on a scale still more enlarged. Themodern terrestrial eye-piece, represented in fig.79, is, in fact, nothing else than a compoundmicroscope, consisting of an object lens, an ampli-fying lens, and an eye-piece composed of… … formed in the focus of the object glass, as a smallluminous object to be rendered visible, in a magni-fied state, by a compound microscope. The objectto be magnified may be considered as placed nearthe point A, and the magnified image at i, whichis viewed by the lens D. Hence, if we lookthrough…
Astronomy · Astronomical instruments · Telescopes
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