Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 145
Fig. 1.—Holophane Reflector light or other direction as required. Seealso Holophane Globe under Globe. Parabolic Reflector.—A reflector ofparabolic form reflects radiation in a parallel … Fig. 2.—Parabolic Keflector beam equal in diameter to that of the re-flector, if the source of radiation be a pointplaced at the focus of the parabola (see fig. 2). This form of re-flector is used forlighthouse pro-jection, search-lights, and trac-tion headlights.Prismatic Re-flector. —…
Electrical engineering
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