The method, named the infinite convergence approach, is used to determine the total absorbed power of a Nd YAG rod when random reflection takes place at the inner surface of the reflector wall.
The backscattering of the sample with a rough surface mainly comes from diffusion (random reflection), which obeys the diffusion speckle theory, and that of the sample with a smooth surface comes from density fluctuation in the internal medium, which corresponds to the Rayleigh scattering theory.
Next, attention is paid to the actual random backscattered reflection coefficient, to estimate it at any location from experimental data at a given grid of locations of the lamina.
Parallel to this first photodetector, a second detector is employed to eliminate the effect of input light fluctuations, imperfection of the optical filters, self-fluorescence at the tip of the fiber, and random back-reflection of the excitation or stimulation light within tissue.
Kirchheimer films the face of these cities with an ardor for details, a fervent love of beauty, of line, form, color — and of the bewitching random wonders of reflections and shadows, the passage of pedestrians and the glint of sunbeams.
