In this paper we will describe a non-intrusive, optically-based instrument that can quantitatively measure singlet molecular oxygen, a constituent of reactive oxygen species (ROS) produced by irradiation of human skin by the longer wavelength UV radiation known as UVA. UVA is causally associated with DNA damage and subsequent development of melanoma. We will present data from healthy human subjects that show formation of singlet molecular oxygen and concomitant production of thymine dimers, indicative of DNA damage. We will also discuss how this instrument may be a valuable tool for the development of more effective sunblock formulations for UVA.
Copyright © 2019 Society of Photo-Optical Instrumentation Engineers. Presented at SPIE Photonics West 2019, SPIE Paper No. 10851-18, 2-7 February, 2019. This paper is made available as an electronic reprint (preprint) with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.