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MidOpt LP Series – LP341 Protective Window

Uniforce Product

Salient Features

LP341 Industrial-Grade Oleophobic VIS A/R Coated Glass Protective Window


LP341 filters are similar to LP340 antireflection-coated protective windows except that they have the added advantage of an oleophobic coating on one side. They are offered in 1mm or 2mmm thickness. The oleophobic (anti-smudge) coating repels fingerprints, oils and moisture build-up, allowing for far easier cleaning. Frequent, uncontrolled rubbing during attempts to clean deposits or debris from the front surface of a lens will often cause scratching or pitting that results in loss of transmission and image clarity.

LP341 trans graph

  • Useful Range : 365-1100nm
  • Cut-on Wavelength 50% T : 335nm
  • Tolerance : +/- 10nm
  • Peak Transmission : ≥98%
  • Surface Quality : 40/20


Protective Filters are designed to shield your lens and lighting from dirt, dust, liquids, impact and harsh environments without sacrificing image quality.

  • Economical solution to protect expensive lenses
  • Useful for imaging in ultraviolet (UV), visible (VIS) and near-infrared (NIR) spectrums
  • Available with a high-efficiency, anti-reflection coating to maximize transmission to 98% or more
  • Offered in both glass and acrylic
  • Exceptional surface quality; 40/20 scratch/dig





MidOpt StablEDGE™ optical filters are specifically designed to be less  susceptible to effects from angular shifting seen when optical filters are placed in front of short focal length (<12 mm) camera lenses.
StablEDGE™ filters take advantage of absorptive filter glass to form the leading
edge of the filter passband.This assures no shifting in this region, even when the
lens FOV exceeds 100°.StablEDGE™ designs are  less angle-of-incidence sensitive, inherently more rugged, and are environmentally stable.



MOUNT & SIZE OPTIONS: In-stock, ready-to-ship Protective Filters are available in Threaded Mounts, sizes M13.25 to M105; 25.4® C-Mount; Slip Mounts; or Unmounted. Custom shapes and sizes are available.

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> Learn More About How to Minimize the Effects of Short Shifting

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Fused Silica Protective Window LP341

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