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A micrometer-thin film coated over a flat glass substrate can deflect a light beam in the same way as a prism. This film can be fabricated to be structurally smooth, at a molecular level, and as clear and haze-free as a polished window of fused silica or sapphire.
Courtesy of BEAM Engineering for Advanced Measurements Co.
With an even wider transmission spectrum than classic optical windows, these flat prisms and lenses — as well as optical vortices, axicons, patterned phase plates, beam shapers, and numerous custom optics — find use for a variety of demanding applications. Many of these applications involve high-energy laser beams and take place in harsh environmental conditions, including in space and on the...
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