ABSTRACT
Rapid technological progress in digital color imaging devices, such as charge-coupled devices, complementary metal-oxide-semiconductor cameras, liquid crystal display, and digital light projection devices, makes these optoelectronic products nearly ubiquitous in daily lives. This chapter introduces the potential use of these color imaging devices as economic analytical instruments. It reviews prospective luminophores amenable for colorimetric chemical quantification using color imaging devices and describes oxygen quantification as an exemplary application of this approach. There are several color space models to quantitatively describe the color intensity with respect to the color-matching function established by the International commission on illumination. The chapter focuses on the sensing based on photoluminescence, that is, luminescence induced by light. Organic dyes are the most widely used reporters in fluorescence sensing because of their economical cost and easy modification of their structures, which can diversify spectral properties. The chapter also explores the possibility of using a filter-free white light source for quantitative imaging of gaseous oxygen.
