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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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A retroreflector is an optical device that reflects light (visible, UV, or IR) in the direction where it came from.
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optical and infrared interferometry will open new vistas for astronomy over the next decade. space based interferometers, operating unfettered by the Earth's atmosphere, will offer the greatest scientific payoff
Optical and infrared interferometry will open new vistas for astronomy over the next decade. Space based interferometers, operating unfettered by the Earth's atmosphere, will offer the greatest scientific payoff. They also present the greatest technological challenge: laser metrology systems must perform with sub-nanometer precision; mechanical vibrations must be controlled to nanometers requiring orders of magnitude disturbance rejection; a multitude of actuators and sensors must operate flawlessly and in concert. The Jet Propulsion Laboratory along with its industry partners are addressing these challenges with a development program that plans to establish technology readiness for the Space Interferometry Mission by end of 2004.
The paper presents a unified view of several of these difficulties in white light fringe estimation.