Optical coatings

Something to Reflect Upon: Diffuse Reflectance Materials & Coatings

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In this white paper, Pro-Lite’s Robert Yeo explains the science of diffuse reflectance, presents Lambert’s cosine law and explains how a diffuse reflectance material appears equally bright from all angles of view. Commercially available diffuse reflectance materials and coatings are described from Labsphere and SphereOptics, while common applications for Lambertian materials are presented, in particular in the development of LIDAR and ADAS proximity sensors.

Coating Polymer Optics: Perfecting the Science

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Advances in optical polymers coupled with developments in fabrication methods have led to more optics designers choosing polymer components over glass and metal optical parts – and its no surprise why. Lower cost, faster production, and less weight are just a few of the myriad advantages that polymer-coated optics lend manufacturers. 

The Solution to Coating DLC on Chalcogenides

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Chalcogenides offer many advantages that legacy IR materials simply cannot match, but they do require a diamond-like carbon (DLC) coating so the optic can withstand the harshest environmental conditions. However, coating chalcogenides with DLC has been notoriously challenging and plagued by adhesion problems and coating defects.  Until now.   

High power laser damage - threshold elevation: Why some optics damage below their published threshold values

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Values for Laser Induced Damage Thresholds (LIDTs) can vary.They vary batch to batch and coating house to coating house. But more worryingly, damage thresholds can vary from test house to test house.  Inflated values present real expense issues to the end user when their optics damage under seemingly safe conditions. 

The shape of modern optical components is becoming increasingly complex, which can make them more difficult to coat.

Functionalising complex shaped optics

Dr Kristin Pfeiffer, Pallabi Paul, and Dr Adriana Szeghalmi have developed conformal coating processes for functionalising strongly curved optics

High power laser damage & annealing - Justification for ISO Standard Recommendations

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Values for Laser Induced Damage Thresholds (LIDTs) can vary. Inflated values give a rosy glow to the coater and a redder glow to the end user when their optics damage under seemingly safe conditions. There is much finger pointing within the damage community and there are numerous sources of variance. This situation highlights the importance of following the ISO standards for laser damage testing. 

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