Purity and intensity of monochromatic light sources

Human Wavelength Discrimination of Monochromatic Light Explained by Optimal Wavelength Decoding of Light of Unknown Intensity

We show that human ability to discriminate the wavelength of monochromatic light can be understood as maximum likelihood decoding of the cone absorptions, with a signal processing efficiency that is independent of the wavelength. This work is built on the framework of ideal observer analysis of visual discrimination used in many previous works. A distinctive aspect of our work is that we highli...

integrated-intensity gratings with pulsed light sources

We performed theoretical calculations of the relative diffraction efficiency of partially coherent light-induced integrated-intensity gratings using pulsed sources, paying particular attention to thermal gratings. We provided a simple intuitive picture of the phenomenon and then calculated exact expressions that, unlike instantaneousintensity-grating results, necessarily require the use of four...

Estimation of Illuminant Direction and Intensity of Multiple Light Sources

This paper presents a novel scheme for locating multiple light sources and estimating their intensities from a pair of stereo images of a sphere. No prior knowledge of the location and radius of the sphere is necessary. The sphere surface is not assumed to be a pure Lambertian surface, instead, it has both Lambertian and specular properties. The light source locating algorithm is based on the f...

Safety standards and measurement techniques for high intensity light sources.

Non-radiating Monochromatic Sources and Their Fields '

A new theorem is derived from which a number of previously known results relating to non-radiating monochromatic sources readily follow. Expressions are also obtained for the field within any non-radiating spherically symmetric source. As an example explicit expressions are found for the field within non-radiating homogeneous spherical sources and curves are presented which show the behavior of...