Abstract

In Fresnel’s analysis of the parabolic reflector, considering finite size of source he defined a quantity he called the useful effect. The present paper applies Fresnel’s test to the hyperbolic reflector. It is shown mathematically that for the hyperbola the useful effect reaches no maximum except for degenerate cases.

© 1937 Optical Society of America

A Biprism for Use in Stellar Interferometry

Edward M. Thorndike
J. Opt. Soc. Am. 27(1) 51-54 (1937)

Hamilton’s Method in Geometrical Optics

J. L. Synge
J. Opt. Soc. Am. 27(2) 75-82 (1937)

Experimental Determination of Photographic Density*

A. M. Koerner and Clifton Tuttle
J. Opt. Soc. Am. 27(7) 241-256 (1937)

The Diffraction Pattern Due to an Absorbing Prism

Roy C. Spencer
J. Opt. Soc. Am. 27(9) 318-322 (1937)

On the Precision of Photometric Observations

Alfred H. Holway
J. Opt. Soc. Am. 27(3) 120-123 (1937)