What Are Infrared PMMA Filters?

OPTOStokes infrared PMMA filters block visible light (<1% T) and transmit 80-95% NIR. Custom IR acrylic panels with anti-scratch coatings available.
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What Materials Are Optical Thin Films Made Of?

Learn about optical thin film materials, their behavior during deposition, stoichiometry changes, and analysis techniques from OPTOStokes coating experts.
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How Does the Angle of Incidence Affect Optical Filter Perfor

Learn how angle of incidence (AOI) affects optical filter performance, including center wavelength blue shift, and best practices for filter placement from OPTO...
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Stray Light Control in Optical Systems: Causes, Effects, and

Learn what causes stray light, how it affects imaging and spectroscopy, and how OPTOStokes optical filters help suppress unwanted wavelengths.
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Key Factors for Machine Vision Filter Performance | OPTOStok

Learn the key factors affecting machine vision filter performance: center wavelength, bandwidth, cutoff depth and range from OPTOStokes experts.
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Optical Filter Coating Thickness Uniformity | OPTOStokes

Learn about optical filter coating thickness uniformity, its critical impact on filter performance, and industry standards for different filter types from OPTOS...
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NIR Quantitative Analysis: Transmission vs Reflectance

Learn how NIR quantitative analysis works, why transmission follows Beer-Lambert law more directly, and why diffuse reflectance needs stricter control of sample...
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Why Near Infrared Analysis Became Practical

Compare NIR transmission, diffuse reflectance, and transflectance modes for industrial analysis. Learn which sampling method fits powders, liquids, pastes, and ...
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Title: Near Infrared Basics for NIR Spectroscopy &amp; Filte

Learn what near infrared (780–2500 nm) really measures, why NIR bands overlap, and how to choose optical filters that improve signal separation and analysis.
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