Patent ID: 6111641
Filing Date: 2000-08-29
Classification: G01J

Abstract:
A nonlinear spectrophotometer for fluorescent materials comprising:(a) a laser for producing a primary laser beam;(b) a second harmonic generation crystal that alters the primary laser beam;(c) a beam splitter for dividing the primary laser beam into a first signal manifold laser beam and a second signal manifold laser beam;(d) a first neutral density filter for filtering the first signal manifold laser beam to a first harmonic spectrum;(e) a means for passing filtered first signal manifold laser beam through a sample;(f) a first sensor for detecting filtered first signal manifold laser beam after passing through a sample;(g) a second neutral density filter for filtering the second signal manifold laser beam to a second harmonic spectrum;(h) a means for passing filtered second signal manifold laser beam through a sample;(i) a second sensor for detecting filtered second signal manifold laser beam after passing through a sample; and(j) a means to compare the outputs of the first and second sensors.