Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Patent
1994-09-27
1996-03-19
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
G01N 2133
Patent
active
055005330
ABSTRACT:
Provisions are made so that an SPF value having high correlation with an in vivo SPF value can be calculated in vitro using a common calculation equation regardless of the material type used. Transmitted UV intensities I(.lambda.) are corrected by respective erythemal effectiveness coefficients EE(.lambda.) to calculate an erythema-inducing UV intensity EUI, and the elements of I(.lambda.) from .lambda.=320 to 400 nm are summed to calculate a transmitted UV-A intensity; then, from the ratio UV-A/EUI, a theoretical value .alpha..sub.TH is calculated for the base .alpha. of a photoaugmentative effectiveness .alpha..sup.UVA, and using EUI.times..alpha..sub.TH.sup.UVA, an ultimate theoretical value EUI.sub.UL of EUI is calculated. When EUI.sub.UL is larger than 75, the SPF value is calculated from 1350/EUI.sub.UL ; otherwise, the SPF value is calculated using an empirical equation.
REFERENCES:
patent: 5148023 (1992-09-01), Hayashi et al.
Cumpelik, "Subscreens At Skin Application Levels: Direct Spectrophotometric Evaluation", J. Soc. Cosmet. Chem., vol. 31:361-366, (1980).
Sayre et al., "Sunscreen Testing Methods: In Vitro Predictions of Effectiveness", J. Soc. Cosmet. Chem., vol. 31:133-143, (1980).
Petro, "Correlation of Spectrophotometric Data With Sunscreen Protection Factors", International Journal of Cosmetic Science, vol. 3:185-196, (1981).
Diffey et al., "A New Substrate To Measure Sunscreen Protection Factors Throughout The Ultraviolet Spectrum", J. Soc. Cosmet. Chem., vol. 40:127-133, (1989).
Willis et al., "Effects Of Long Ultraviolet Rays On Human Skin: Photoprotective Or Photoaugmentative", The Journal Of Investigative Dermatology, vol. 59, No. 6, pp. 416-420, (1973).
Kaidbey et al., "Further Studies Of Photoaugmentation In Humans: Phototoxic Reactions", The Journal Of Investigative Dermatology, vol. 65:472-475, (1975).
Kumagai Shigenori
Odagiri Harumi
Ogawa Katsuki
Fields Carolyn E.
Shiseido Company Ltd.
LandOfFree
Method and apparatus for measuring ultraviolet protection effect does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring ultraviolet protection effect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring ultraviolet protection effect will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1960146