Chalcogenide Glasses for Infrared Optics - download pdf or read online

By A. Ray Hilton

ISBN-10: 0071596976

ISBN-13: 9780071596978

State of the art recommendations for yielding top quality chalcogenide glasses This pioneering paintings describes the know-how, constructed over a 50-year interval, to make use of chalcogenide glasses as infrared optical fabrics. equipment for qualitatively settling on chalcogenide glass compositions and generating high-purity homogeneous glass are mentioned. Chalcogenide Glasses for Infrared Optics comprises specified construction thoughts constructed throughout the author's paintings at either Texas tools (TI) and Amorphous fabrics, Inc. (AMI). The construction of vacuum waft zoned silicon, gallium arsenide, and cadmium telluride, all necessary in infrared expertise, is defined. The ebook highlights examples of the way glass composition might be replaced to reinforce a specific estate. insurance contains: Transmission of sunshine through solids actual homes of chalcogenide glasses Glass construction cautious characterization of glass houses traditional lens fabrication--spherical surfaces Molding of unconventional aspheric lenses with diffractive surfaces Glass strategies for different functions IR imaging bundles made up of chalcogenide glass fibers creation of infrared crystalline fabrics at AMI improvement of an automated ellipsometer method at TI

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Many factors may affect results. 3 Density The densities of selenium and tellurium glasses containing silicon, germanium, arsenic, and phosphorus are almost a linear function of the calculated average molecular weight of the glass composition. 14 Correlation of softening point and thermal expansion for chalcogenide glasses. 15 plots the results for 28 glass compositions. The densities for Te, Se, S, Si, and Ge are added for reference. Some of the samples were small in mass. The values obtained from large samples, the prisms and the cast plate, were given greater consideration in drawing the straight line.

Disks were cut from the glass sample, and polished and evaluated relative to infrared transmission as a function of wavelength, and a qualitative estimate of the refractive index of each was determined. 8 shows the results of this effort. Note that at this time, measurements were crude in comparison to today and could only be considered qualitative. Following this procedure developed in the exploratory program, seven ternary IVA-VA-VIA systems were evaluated during the threeyear period from 1962 to 1965.

However, they are not useful for the thermal window, the goal of the program. 9 is a photograph of a large cast Si-GeAs-Te glass plate. Also shown are glass prisms to be used to measure the infrared refractive index quantitatively as a function of wavelength. 10 shows an attachment built at TI for the Perkin Elmer 13 U spectrophotometer for performing the prism minimum deviation measurement in the infrared. The results are precise index numbers good to three to four decimal points. We will discuss this method in detail when the instrument used presently at AMI is described in Chapter 4.

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Chalcogenide Glasses for Infrared Optics by A. Ray Hilton

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