Elementary optics and applications to fire control instruments (1922)
United States. Army. Ordnance Dept · Washington, Govt. Print. Off. · leaf 71
ultto secure a piece of glass large enough and sufficiently homogeneousexcept for telescopes of the smaller size. THE FIELD OF VIEW AND BRIGHTNESS OF IMAGE. In figure 69 the telescope shown in figure 52 is again illustrated.The courses of rays AD, BD, and CD are traced. These are all inci-dent at… … Fig. 69.—Field of view of telescope. by the lenses but proceeds along the straight line BDGHIJ. Tliis rayshould be considered as representative of a bundle of parallel raysproceeding from the axial point of the distant object, brought to afocus at G and again converted into a bundle of parallel…
Optics · Optical instruments · Fire control (Gunnery) -- Optical equipment
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