Abstract
An optical system, consisting of cylindrical, spherical, and conical optics, capable of producing multiple images of a point source is described. The relative energy content of each image is calculated and compared to measured values. It was tested in a system for simultaneously monitoring CO2, CH4, and CO in a gas mixture by infrared radiation absorption. Other possible applications in radiometry and laser communications are suggested.
© 1964 Optical Society of America
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