7G20.30 - Laser Speckle Pattern

See paragraph one in the procedure section.
Code Number:
Demo Title:
Laser Speckle Pattern
Two-Dimensional Gratings
Area of Study:
Optics, Astronomy
Laser with diffusing lens, ground glass plate.

Place the diffusing lens on the laser and shoot through the ground glass plate onto a screen.  Try to make the speckle pattern at least 6" in diameter for good viewing.

  • Jay M. Pasachoff, "Grazing Incidence Reflection and X-Ray Images",  TPT, Vol. 41, # 6, Sept. 2003, p. 318.
  • Hasan Fakhruddin,  "Specular Reflection from a Rough Surface",  TPT, Vol. 41, # 4, p. 206, April 2003.
  • Pietro Ferraro, "Speckle Noise or Dust Diffraction?", TPT, Vol. 37, # 6, Sept. 1999, p. 324.
  • John L. Carlsten,  "Laser Speckle",  TPT, Vol. 25, # 3, p. 175, March 1987.
  • Hasan Fakhruddin, "Specular Reflection from a Rough Surface", TPT, Vol. 41, #4, April 2003, p. 206-207.
  • Thomas B. Greenslade, Jr., "Reflection of Particles (Photo)", AJP, Vol. 71, # 9, Sept. 2003, p. 877.
  • Maurizio Vannoni and Giuseppe Molesini, "Speckle Interferometry Experiments With A Digital Photocamera", AJP, Vol. 72, # 7, July 2004, p. 863.
  • R. D. et al.,  "Young's Double-Slit Experiment Using Speckle Photography",  AJP, p. 531, Vol. 56, No. 6, June 1988.
  • Jearl Walker,  "The "Speckle" on a Surface Lit By Laser Light Can Be Seen with Other Kinds of Illumination",  The Amateur Scientist, Aug. 2001.
  • T. Kallard, "Method and Procedure for Eye Testing with Laser Speckle", Exploring Laser Light, p. 165.
  • T. Kallard, "Laser Speckle Phenomenon", Exploring Laser Light, p. 160.
  • Jearl Walker, "6.124, Speckle Patterns", The Flying Circus of Physics Ed. 2, p. 293.
  • "62, Laser Speckle",  Christopher P. Jargodzki and Franklin Potter,  Mad About Physics, p. 20, p. 171.
  • Gordon McComb,  Lasers, Ray Guns, & Light Cannons - Projects from the Wizard's Workbench, p. 70.
  • Raymond Bruman,  "Long Path Diffraction",  Exploratorium Cookbook I, p. 8.1.

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