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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 27, Iss. 1 — Jan. 1, 2010
  • pp: 50–57

Distortion of binoculars revisited: Does the sweet spot exist?

Holger Merlitz  »View Author Affiliations


JOSA A, Vol. 27, Issue 1, pp. 50-57 (2010)
http://dx.doi.org/10.1364/JOSAA.27.000050


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Abstract

Sixty years ago, August Sonnefeld of Zeiss reported on observations with experimental telescopes. The goal of his investigation was to determine the ideal amount of distortion applied to optical instruments that are used in combination with the human eye. His studies were inconclusive and partially contradictory. We have picked up this problem once again, adopting a modern point of view about the human imaging process, and supported by computer graphics. Based on experiments with Helmholtz checkerboards, we argue that human imaging introduces a certain amount of barrel distortion, which has to be counterbalanced through the implementation of an equally strong pincushion distortion into the binocular design. We discuss in detail how this approach is capable of eliminating the globe effect of the panning binocular and how the residual pincushion distortion affects the image when the eye is pointing off-center. Our results support the binocular designer in optimizing his instrument for its intended mode of application, and may help binocular users and astronomers better understand their tools.

© 2009 Optical Society of America

OCIS Codes
(000.2850) General : History and philosophy
(220.1000) Optical design and fabrication : Aberration compensation
(330.4060) Vision, color, and visual optics : Vision modeling
(330.7321) Vision, color, and visual optics : Vision coupled optical systems

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: July 1, 2009
Revised Manuscript: November 6, 2009
Manuscript Accepted: November 11, 2009
Published: December 7, 2009

Virtual Issues
Vol. 5, Iss. 2 Virtual Journal for Biomedical Optics

Citation
Holger Merlitz, "Distortion of binoculars revisited: Does the sweet spot exist?," J. Opt. Soc. Am. A 27, 50-57 (2010)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-1-50


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References

  1. A. Sonnefeld, “Über die Verzeichnung bei optischen Instrumenten, die in Verbindung mit dem rollenden Auge gebraucht werden,” Deutsche Optische Wochenschrift 13, 97-99 (1949).
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  10. www.holgermerlitz. de/globe/distortion.html.
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