System for the visualization of exposure to ultraviolet radiatio

Details System for the visualization of exposure to ultraviolet radiatio System for the visualization of exposure to ultraviolet radiatio

1989-04-27

1991-07-02

Bowers, Jr., Charles L.

Radiant energy

Invisible radiation responsive nonelectric signalling

Optical change type

430338, 430340, 430346, 2504821, G01J 150, G03C 173

Patent

active

050287923

ABSTRACT:
Photochemical systems for the direct visualization of exposure to ultraviolet radiation that effect visible color changes involving a process in which a photoacid is formed upon irradiation of a nitro-substituted aromatic aldehyde with ultraviolet light and wherein proton transfer to a dye causes the dye to undergo a visible color change. The system undergoes such color change to an extent directly proportional to the cumulative amount of ultraviolet incident thereupon.

REFERENCES:
patent: 3112200 (1963-11-01), Wainer
patent: 3121632 (1964-02-01), Sprague et al.
patent: 3290499 (1966-12-01), Vale et al.
patent: 3691380 (1972-09-01), Hubner et al.
patent: 3899677 (1975-08-01), Hori et al.
patent: 4297519 (1981-10-01), Ertel
patent: 4308459 (1981-12-01), Williams
patent: 4737463 (1988-04-01), Bhattacharjee et al.
Cowell, G. W., Journal of the American Chemical Society, 90:5, pp. 1106-1110 (1968).

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