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BP340 Near-UV Bandpass Filter

Published: December 17, 2020

Just released by Midopt, the BP340 Near-UV Bandpass filters are an economical yet highly transmissive/high contrast alternative to far more costly thin film interference filters. This design combines rugged dielectric coatings and absorptive filter glass to ensure a highly stable passband and excellent out-of-band blocking.

It also makes it possible to supply larger custom shapes and sizes – up to 165mm square – within a matter of days. BP340 finds use in UV fluorescence, forensic, scientific, multispectral, machine vision, sensing and other imaging applications.


  • Useful Range: 315-365nm
  • FWHM: 80nm
  • Peak Transmission: ≥90%
  • Tolerance : +/- 10nm
  • Surface Quality : 40/20
  • CWL: 340nm
  • Thickness: 1mm
  • Mounted sizes from M13.25–M105
  • Unmounted sizes available up to 165mm
  • Compatible LED: 340nm

BP340 Near-UV Bandpass Filter graph

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