Pentaprisms with coatings optimized for demanding laser applications.

REO (Boulder, CO) offers pentaprisms with coatings optimized for demanding laser applications, such as target designation and range finding. The pentaprisms feature dielectric antireflection and high-reflection coatings manufactured using ion beam sputtering (IBS) technology. The densified films exhibit laser damage characteristics of over 12 J/cm² in 20 nsec pulses at 1064nm. IBS technology also enables optical coatings with complex spectral characteristics, including multi-spectral operation, where high performance is required at several widely spaced wavelengths or wavelength bands (for example, both 1064nm and 1573nm).

REO pentaprisms can be fabricated from a variety of materials suitable for the visible and near infrared spectral ranges, including fused silica, optical glasses, Si, Ge, ZnSe, and ZnS. Typical entrance-face size range is from 12mm to 25mm. These optics also feature low total wavefront distortion on transmission (< λ⁄4 at 633nm), laser grade surface quality (10-5), and high deviation accuracy (≤ 30 arc seconds).

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Photonics Tech Briefs Magazine

This article first appeared in the November, 2011 issue of Photonics Tech Briefs Magazine.

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