Optical coatings

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. 

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. 

Hybrid Mode Optical Monitoring – Benefiting from Monochromatic and Broadband Algorithms in the same Coating Process

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 Broadband monitoring with high signal quality enables use of both broadband and monochromatic layer termination algorithms in the same process when depositing optical interference coatings. Case studies using a bandpass filter and an absorbing layer show how such a “hybrid” approach can lead to the most accurate layer termination.

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