Radiant energy – Invisible radiation responsive nonelectric signalling – Optical change type
Patent
1998-03-20
2000-10-10
Hannaher, Constantine
Radiant energy
Invisible radiation responsive nonelectric signalling
Optical change type
G01J 548
Patent
active
061304352
ABSTRACT:
An apparatus for measuring the effectiveness of a sunscreen composition applied to protect an epidermis from harmful exposure to ultraviolet light, the epidermis having a texture and an absorbent character, the apparatus comprising an ultraviolet light-sensitive layer for changing color when exposed to ultraviolet light, the layer receivable adjacent the epidermis and having a texture and an absorbent character substantially similar to the texture and absorbent character of the epidermis.
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Goltry Michael W.
Hannaher Constantine
Parsons Robert A.
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