Physical Sciences

Using Laser-Induced Incandescence To Measure Soot in Exhaust

This system incorporates several improvements over prior LII soot-measuring systems. An instrumentation system exploits laser-induced incandescence (LII) to measure the concentration of soot particles in an exhaust stream from an engine, furnace, or industrial process that burns hydrocarbon fuel. In comparison with LII soot-concentration-measuring systems that have been described in prior NASA Tech Briefs articles, this system is more complex and more capable.

Posted in: Physical Sciences, Photonics, Briefs

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Software Enables Advanced Modeling of Backlights for Flat Panel Displays

This enhanced illumination design and analysis program, called LightTools® 5.1, enables easy and accurate modeling of sophisticated backlights for flat panel displays. It can simulate the surface textures used for backlights, with built-in flexibility to vary the shape, size, and spacing of the texture elements.

Posted in: Physical Sciences, Photonics, Briefs

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