Elementary optics and applications to fire control instruments (1922)
United States. Army. Ordnance Dept · Washington, Govt. Print. Off. · leaf 88
kes. The third method is indicated infigure 82 and is the most precise ofall, but more inconvenient to apply.The eye is brought directly behindthe collimator and in such a posi-tion that the lower half of the pupilreceives light from tRe collimator,the upper half from the target.The cross and… … .—The collimator or the Michelin sight. the collimator 85 An interesting and ingenious elaboration of the collimator sightis employed in the Miehelin bomb sight. The optical system is. illus-trated in figure 83. The cube of glass ABCD is made up of two piecescemented together at the diagonal…
Optics · Optical instruments · Fire control (Gunnery) -- Optical equipment
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