Compositions – Radioactive compositions – Nuclear reactor fuel
Patent
1974-03-18
1976-06-22
Padgett, Benjamin R.
Compositions
Radioactive compositions
Nuclear reactor fuel
252300, 350149, 428438, G02B 523
Patent
active
039648230
ABSTRACT:
Articles are described which utilize a unique photochemical property of a certain class of heterocyclic compounds. These heterocyclic compounds are the mono- and bicyclic aziridines. Oriented crystals of these heterocyclic compounds are photochromic in an unusual way. The effect of the excitation radiation and the strength of the resulting absorption band responsible for the appearance of color depend on the polarization of the radiation. These articles contain at least one optically smooth surface. Typical articles are windshields or glass panes which darken on being exposed to glare and sunglasses. Switching devices are also described which exist in two states; one state characterized by absorption of certain radiation over wavelength range and the other state by high transparency.
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patent: 3540793 (1970-11-01), Araujo et al.
patent: 3609165 (1971-09-01), Heine et al.
patent: 3617114 (1971-11-01), Rogers
patent: 3638201 (1972-01-01), Borner
Cromwell, et al., "Ethylene Imine Ketones," J. Amer. Chem. Soc. 73:1044 (1951).
Shurcliff, W. A., Polarized Light Harvard University Press, Cambridge, 1962 pp. 47-50.
Bell Telephone Laboratories Incorporated
Kyle Deborah L.
Nilsen W. G.
Padgett Benjamin R.
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