OPTICAL LIMITER INCLUDING OPTICAL CONVERGENCE AND ABSORBING BODY WITH INHOMOGENEOUS DISTRIBUTION OF REVERSE SATURABLE MATERIAL

摘要

a lens (12) for converging a light beam (16) in a body of light absorbing material (14) which has a saturable optical absorption contrast with a non-uniform concentration distribution.the concentration is maximum at the household level (20) of the converged light beam (16), and decreases toward the lens (12) with a distribution is selected in correspondence with the optical gain of the light beam converged (16) in order to limit the effect of the light beam (16) spreading in the body tissue (14), and the output energy of the light beam (16).to predetermined maximum values.the non-uniform concentration also produced a shift in the autoprotecteur resulting in the region of the light beam converged maximum fluence (16) to the lens (12), thereby protecting the optical gain region and the concentration of the high molecular higher, as the input energy of the light beam (16) is increased.