Optical: systems and elements – Absorption filter – Fluid
Patent
1984-08-30
1994-05-31
Moskowitz, Nelson
Optical: systems and elements
Absorption filter
Fluid
359 45, 359 66, 359 15, 359890, C02B 528, C02B 2160
Patent
active
053174542
ABSTRACT:
(S) A first optical material with a linear index of refraction is distributed as particles in a second optical material with an index of refraction dependent on the incident radiation intensity. Below some threshold intensity level the combination of materials is transparent to incident radiation directed toward a sensitive optical detector. Above this level, high-intensity incident radiation induces a change in refractive index of the second material, and the combination is limiting to incident radiation.
REFERENCES:
patent: 3792916 (1974-02-01), Sarna
patent: 4140369 (1979-02-01), Howland
patent: 4477151 (1984-10-01), Marb
Bobb, L.; "Active Optical Filter"; May 30, 1979; pp. 1-10; N&IS AD-D006 40; Abst. Provided.
Ashkin et al.; "Continuous Wave . . . Kerr Media"; Jun. 1982; pp. 276-278, Optics Letters; vol. 7, No. 6.
Smith et al., "Use of a Liquid Suspension of dielectric Spheres". . . Aug. 1982, pp. 347-349; Optics Letters, vol. 7, #8.
Khoo, I. C.; "Optical Thermos Induced TIR . . . ", Apr. 15, 1982, pp. 645-647; Appl. Phys. Lett., vol. 40, No. 8.
Sharp Edward J.
Shurtz, II Richard R.
Wood Gary L.
Dunn Aubrey J.
Lane Anthony T.
Lee Milton W.
Moskowitz Nelson
The United States of America as represented by the Secretary of
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