Specular light component


is solved for r to obtain r=0.5, under the normal incidence to the screen with σφ=4πσh/λ=5.72 resulting Exp(-2σφ2)=3×10-23.

This gives the background for the elimination of specular reflection light in fully developed speckle contrast detection.

Goodman p-30

3.2.2 Constant phasor plus a random phasor sum

ratio b/w intensity of known phasor and average intensity of random phasor

Modified Rician density function

When the screen is normal to the optical axis, the specular light overlaps on the CCD.
The Radius of overlapped area is 61 microns.

Plot of pI(I)

r=0 corresponds to the negative exponential function for the fully developed speckle.

Oxide Corporation

Speckle contrast Measurement System