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Help Center365nm Narrowband Filter: Precise UV Band Screening, Essential Optical Component for Scientific Research and Detection
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The 365nm narrowband filter is a precision optical filter device designed specifically for the ultraviolet band (UV-A), with a center wavelength locked at 365 nanometers and a full width at half maximum (FWHM) typically controlled within the range of 10-20nm. This filter adopts multi-layer dielectric film interference technology to achieve precise transmission of specific ultraviolet bands, while effectively cutting off stray light interference in other bands.
Core technical features
Accurate spectral selectivity
Center wavelength: 365nm ± 2nm
Peak transmittance:>80% (can reach over 90%)
Cut off depth: OD4-OD6 (optical density level 4-6)
Cut off range: 200-1100nm full band deep cut-off
Excellent optical performance
Prepared by electron beam evaporation or ion assisted deposition (IAD) process, the film layer is dense and stable, with excellent environmental adaptability and long-term spectral stability. High purity fused silica or special UV glass is selected as the base material to ensure low absorption and high penetration in deep UV area.
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