Abstract

This is an extension of the author’s previous theory, originally limited to the vertical axial plane, to cover the entire reflector. The basis is established for the difference in the action of that portion of the reflector behind the focal plane from that in front of the focal plane. Computations on a representative headlamp reflector show the approximate limits of the region of anomalous behavior of the “depressed” beam.

© 1934 Optical Society of America

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