Compositions – Light transmission modifying compositions
Patent
1990-03-29
1993-10-12
Stoll, Robert L.
Compositions
Light transmission modifying compositions
359885, F21V 900, G02B 524
Patent
active
052522563
ABSTRACT:
Optically sensitive materials such as sensors or the human eye are passively protected against overexposure to high intensity light in the visible range using a reverse saturable absorber organometallic cluster compound having a core of at least two multiply-bonded transition metal atoms selected from group 8, 6b, or 7b of the periodic table. The core atoms are bound together with ligands that permit the formation of a complex. A preferred organometallic cluster compound is cyclopentadienyl iron carbonyl tetramer. As the intensity of incident light increases, the intensity of transmitted light also increases up to a satur
REFERENCES:
patent: 3620597 (1971-11-01), Schwartz et al.
patent: 4657345 (1987-04-01), Gordon
patent: 4723248 (1988-02-01), Harter et al.
patent: 4885114 (1989-12-01), Gordon et al.
patent: 4890075 (1989-12-01), Pohlmann
patent: 5026885 (1991-06-01), Bell et al.
patent: 5080469 (1992-01-01), McCahon et al.
A. J. White et al., Journal of Chemical Education, vol. 57, No. 4, (1980), pp. 317-319.
Psaro et al., "The Thermal Behaviour of Some Polynuclear Neutral Cyclopentadienyl Carbonyl Complexes of Ni, Fe, and Ru: A thermogravimetric and Infrared Investigation", J. of Molecular Catalysis, vol. 16, (1982), pp. 117-129.
King, R. B., "Organometallic Chemistry of the Transition Metals. XVI.Polynuclear Cyclopentadienylmetal Carbonyls of Iron and Cobalt", Inorganic Chemistry, vol. 15, No. 12, Dec. 1966, pp. 2227-2230.
White and Cunningham, "Synthesis and Electrochemistry of Cyclopentadienylcarbonyl iron Tetramer", J. Chemical Education, vol. 57, No. 4, 1980, pp. 317-319.
Geoffroy and Wrighton, "Organometallic Photochemistry", Academic Press, 1979, pp. 12-15 and 143-148.
Purcell and Kotz, "Inorganic Chemistry" W. B. Saunders Company, 1977, pp. 793-803 and 1036-1039.
Blackmore, T. et al., "Chemistry of the Metal Carbonyls, Part LIII, Some Dicarbonyl-(pi-cyclopentadienyl) Ruthenuim Complexes Containing Metal-Metal Bonds" J. Chem. Soc.(A) (1968) pp. 2931-2936.
L. W. Tutt et al., "Optical Limiting Via Reverse Saturable Absorption in Metal Cluster Compounds", Conference on Laser and Electro-Optics 1989 Technical Digest Series, vol. 11, Apr. 24, 1989, Washington, pp. 158-160.
R. C. Hoffman et al., "Reverse Saturable Absorbers: Indanthrone and its Derivatives" J. of the Optical Society of America-B vol. 6, No. 4, Apr. 1989, New York, pp. 772-777 and Abstract.
L. W. Tutt, "Reverse Saturable Absorption in Metal Cluster Compounds", Optics Letters, vol. 15, No. 12, Jun. 15, 1990, New York, pp. 700-702.
Applied Optics (Swope and Koester) May 1965 pp. 523-526 vol. 4, No. 5 "Eye Protection Against Lasers".
Hagan et al., "Passive Broadband High Dynamic Range Semi-Conductor Limiters", SPIE vol. 1105, Materials for Optical Switches, Isolators, and Limiters (1989), pp. 103-113.
Tutt et al., "Optical Limiting Via Reverse Saturable Absorption in Metal Cluster Compounds", CLEO '89/Wednesday Morning, pp. 158-160.
K. P. J. Reddy, "An Analysis of Pulse Propagation Through a Saturable Absorber Having Excited-State Absorption", Optical and Quantum Electronics 19 (1987), pp. 203-208.
"Optical Limiting in Solutions of Metallo-phthalocyanines and Naphthalocyanines", D. R. Coulter, et al., SPIE vol. 1105, Materials for Optical Switches, Isolators, and Limiters (1989), pp. 42-51.
McCahon Stephen W.
Tutt Lee W.
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
Stoll Robert L.
Tucker Philip
LandOfFree
Passive protection of optically sensitive materials with transit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Passive protection of optically sensitive materials with transit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Passive protection of optically sensitive materials with transit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1902274