Abstract

Telescopes which allow a change of magnification of 3 to 1 linear or 10 to 1 in area are well known. A new telescopic system with variable magnification will be demonstrated which has a range of angular magnification of 10 to 1 or a variation of area covered of 100 to 1. The apparent angle of field is 53°. During the changes in magnification the focal deviation is negligibly small and well within the accommodation range of the human eye.

© 1953 Optical Society of America

Analysis of Cassegrainian-Type Telescopic Systems

P. R. Yoder, F. B. Patrick, and A. E. Gee
J. Opt. Soc. Am. 43(12) 1200-1204 (1953)

Photoelectric Raman Spectrometer with Automatic Range Changing. I. Conversion of Photographic Instrument*

Robert F. Stamm, C. F. Salzman, and Thomas Mariner
J. Opt. Soc. Am. 43(2) 119-125 (1953)

Photoelectric Raman Spectrometer with Automatic Range Changing. II. Conversion of Perkin-Elmer Infrared Instrument to Grating Type

Robert F. Stamm and C. F. Salzman
J. Opt. Soc. Am. 43(2) 126-137 (1953)

Precision Measurement of Wavelengths with Echelle Spectrographs*

George R. Harrison, Sumner P. Davis, and Hugh J. Robertson
J. Opt. Soc. Am. 43(10) 853-861 (1953)

Lens Testing Bench*

Karl Leistner, Bernard Marcus, and Burton W. Wheeler
J. Opt. Soc. Am. 43(1) 44-48 (1953)