Elementary optics and applications to fire control instruments (1922)
United States. Army. Ordnance Dept · Washington, Govt. Print. Off. · leaf 90
gle is read may then be graduated to read directly in range. Al-thougli the instrument is graduated to read in linear units, it mustbe constantl;^ borne in mind tliat the range finder is fundamentally an angle-measuring instrumentand, in a study of the errors of theinstrument, important… … racy - =transposing dr Differentiating and -dm (49) and we have the relationship ex-isting between the range error dr■ and the corresponding angular* error dm. In the horizontal baserange finder, as used by the FieldArtillery, the base length is 1meter. At a range of 4,000 me-ters the total value…
Optics · Optical instruments · Fire control (Gunnery) -- Optical equipment
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
