9 Computer software and downloadable software for characterizing and mapping both the spatial and angular distribution of light radiating from light sources; photometric tool, namely, a charge coupled device and integrated software to measure and analyze light sources; computer software for the design and analysis of optical systems; imaging photometers and colorimeters used to measure the properties of light and materials, namely, radiance, luminance, chromacity, reflectance, transmittance, scatter, bidirectional reflectance distribution function (BRDF), bidirectional transmittance function (BRTF), color, contrast, color temperature, spectral power distribution and illuminance; optical devices for measuring and displaying spatial and angular distribution of light radiating from light sources; computer software for inspection, testing, correcting, and calibrating flat panel displays, LED screens, and back-illuminated keyboards and keypads; computer software for color calibration of displays, large video screens and scoreboards; computer programs for calculating lens curvature in the fields of lens and optical component design, including lens and optical component design for cameras, telescopes, microscopes and scientific instruments; computer programs for calculating and designing optimal illumination and lighting schemes for residential and commercial lighting applications; engineering software for constructing and designing digital and electronic displays and their components, including digital projectors, LCD displays and light pipes