UV Filters: UV Blocking & UV Pass
UV filters either keep ultraviolet out or let only ultraviolet through. We supply UV-blocking glass that stops over 99% of UV below 400 nm while passing over 85% of visible light, 390 nm and 415 nm UV-blocking windows, and UV-pass filters for curing, fluorescence and blacklight systems, with UV-blocking sheets up to 48 × 68 in.
Capabilities
UV-blocking glass
99% UV blocked below 400 nm · >85% visible transmission
Color rendering
CRI 95 average · Neutral appearance
UV-block windows
390 nm absorbing · 415 nm reflective AR
UV pass
335–400 nm near-UV · Blocks visible and UVC
Substrates
Borofloat®, to 500 °C · Fused quartz, to 1000 °C
Formats
Sheets up to 48 × 68 in · Windows, lenses, custom shapes
Gallery
Get a UV filter quote
Tell us whether UV must be blocked or passed, the UV source or LED wavelength, the operating temperature and the size, and we will recommend the filter.
Block UV or Pass UV?
Choose the filter by what has to reach the other side.
Protect displays, artwork and materials
UV-blocking glass stops over 99% of UV below 400 nm while passing over 85% of visible light, so colors stay true behind it.
A simple UV-absorbing window
The 390 nm longpass absorbs UV and passes visible light at 90% or more, for protective windows over sensors and optics.
Block UV LEDs and long exposure
The 415 nm reflective AR window passes 415–1100 nm at 95% or more and reflects the full UV spectrum, including 395 nm LED light. It does not solarize over time.
Block UV and near-IR together
A visible-pass shortpass removes both ends of the spectrum for color cameras.
Pass near-UV only
The 365 nm bandpass passes 335–400 nm, covering 365 and 395 nm LEDs, and blocks visible light and UVC.
Broad UV pass for curing and blacklight
UV-pass filter glass transmits the UV band and absorbs visible light, for curing systems, blacklight lamps and reflective UV imaging.
UV Filter Specifications
| Filter | Pass band or cut-on | Transmission | Tolerance | Notes |
|---|---|---|---|---|
| UV-blocking glass | Blocks >99% below 400 nm | >85% visible, CRI 95 | — | Sheets to 48 × 68 in; can be coated on Borofloat® |
| 390 nm UV-absorbing window | Cut-on 390 nm | ≥90% | ±10 nm | 40/20 scratch-dig |
| 415 nm UV-blocking AR window | 415–1100 nm | ≥95% | ±10 nm | Reflects UV; Borofloat® to 500 °C or fused quartz to 1000 °C |
| 365 nm near-UV bandpass | 335–400 nm | ≥85% | ±10 nm | Blocks visible and UVC |
| UV + NIR block, visible pass | 410–690 nm | ≥90% | ±10 nm | Cut-on 400 nm, cut-off 700 nm |
Where UV Filters Are Used
Museum and display cases
UV-blocking glass slows fading and photochemical damage to textiles, watercolors, documents and inks, without tinting what is on show.
Outdoor displays and signage
Over LCD signage and menu boards, it keeps UV off the panel and its polarizers.
Medical and imaging equipment
UV-blocking windows protect sensors, optics and color cameras from UV and from UV LEDs nearby.
Architectural and display lighting
Filters over fixtures remove the UV component of the light falling on displays and finishes.
UV curing and fluorescence
UV-pass filters deliver the curing or excitation band and remove visible light from fluorescence microscopy and imaging.
Blacklight and reflective UV imaging
UV-pass glass in blacklight lamps and UV cameras isolates the UV image.
UV Filter Questions
390 nm or 415 nm cut-on?
If the UV source is a 395 nm LED, choose 415 nm. A 390 nm edge with ±10 nm tolerance can let part of that LED’s light through; the 415 nm filter blocks it with room to spare. For sunlight and general UV protection, 390 nm is usually enough.
Absorbing or reflective UV blocking?
An absorbing filter is simple and works the same at any angle. A reflective coating turns the UV away instead of soaking it up, and the 415 nm design does not solarize, so it holds its performance under long or intense UV exposure.
Which substrate near a UV lamp?
Borofloat® handles up to 500 °C. Closer to the lamp, drawn fused quartz takes up to 1000 °C, but it is for non-imaging uses such as lamp covers and shields.
Does UV-blocking glass change colors?
Very little. It passes over 85% of visible light with an average color rendering index of 95.