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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 39, Iss. 3 — Mar. 1, 1949
  • pp: 249–250

The Effect of Finite Aperture on the Fringe Intensity Distribution of Fabry Perot Interferometers

FELIX E. GEIGER, JR.  »View Author Affiliations

JOSA, Vol. 39, Issue 3, pp. 249-250 (1949)

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The effect of finite aperture of a Fabry Perot interferometer on the fringe intensity distribution in the interferometer pattern is investigated. An equation is derived for a square etalon which illustrates clearly the decrease in fringe intensity for increasing angles of incidence. The computations show that this effect becomes significant only for high reflecting powers and comparatively large plate separations.

FELIX E. GEIGER, JR., "The Effect of Finite Aperture on the Fringe Intensity Distribution of Fabry Perot Interferometers," J. Opt. Soc. Am. 39, 249-250 (1949)

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  1. S. Tolanskv, High Resolution Spectroscopy (Pitman Publishing Corporation, New York, 1947), Chapter VII, p. 98.
  2. See reference 1, Chapter IX, p. 161.
  3. In Fig. 1 and elsewhere, whereas δ is the phase difference between strictly consecutive reflections, references to successively reflected beams, and to the nth and pth reflected beams apply, not to strictly consecutive reflections, but to consecutive beams reflected at the first plate and transmitted through the second to the camera.

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