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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 9 — Mar. 20, 1999
  • pp: 1573–1578

Ray Theory Analysis of the Shadow Blister Effect

James A. Lock  »View Author Affiliations


Applied Optics, Vol. 38, Issue 9, pp. 1573-1578 (1999)


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Abstract

When an extended light source such as the Sun illuminates two objects so that their shadows lie close to each other, the shadow of one of the objects occasionally appears to bulge out toward the shadow of the other. This effect is caused by the overlap of the penumbras of the shadows and is analyzed here with ray theory. A laboratory demonstration of this phenomenon is performed and compared with theoretical predictions.

© 1998 Optical Society of America

OCIS Codes
(080.0080) Geometric optics : Geometric optics

Citation
James A. Lock, "Ray Theory Analysis of the Shadow Blister Effect," Appl. Opt. 38, 1573-1578 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-9-1573


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References

  1. M. Minnaert, The Nature of Light and Color in the Open Air (Dover, New York, 1954), pp. 3–7.
  2. D. K. Lynch and W. Livingston, Color and Light in Nature, (Cambridge U. Press, Cambridge, 1995), pp. 1–19.
  3. F. M. Du Mas, “A new visual illusion,” Am. J. Psychol. 66, 142–143 (1953).
  4. J. R. Trotter, “The geometrical optics of the blister effect,” Vision Res. 6, 587–596 (1966).

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