NIR Cut Filters
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Technical Details of NIR Cut Filters

SCHOTT’s team of experts have packed their NIR cut filters full of exceptional features and qualities, including corrosion-beating coatings, first-rate transmission levels, and impressive NIR absorption.

Color excellence in all areas

Complete clarity

Protected by a special coating, the humidity-resistant glasses stay completely transparent, with no surface corrosion even after more than 1,000 hours of use.

Premium transmission

The filters possess superb optical qualities: those with steep NIR cut levels provide first-rate transmission and high blocking with an extremely narrow transition range.

Excellent NIR absorption

Both types of glasses achieve high NIR absorption, with the steep NIR cut glasses making excellent bandpass filters for visual areas where significant absorption in the NIR wavelength range is required.

Having the edge

The slope of the IR edge is outstanding in the steep NIR cut glasses, which ensures there’s a clear distinction between visible light and near-infrared radiation.
High humidity resistance
High steepness of NIR cut
NVIS-compatible

High humidity resistance

BG47, BG59, BG60, BG61, BG62, BG66, BG67

SCHOTT’s new IR filter glasses have been designed to perform in difficult environments. Equipped with a special coating, these filters remain completely transparent for more than 1,000 hours without any surface corrosion, delivering extraordinary image quality.


NIR cut filters at different thicknesses

7-ROW-NIR-Cutoff-Filter-Blue-Filter_671px.png 

 

BG47 BG59 BG60 BG61 BG62 BG66 BG67
Refractive index ne 1.5420 1.5547 1.5399 1.5370 1.5417 1.5430 1.5427
nd 1.5405 1.5523 1.5379 1.5350 1.5397 1.5388 1.5405
Cutoff wavelength λ0.5 633 nm 634 nm 633 nm 648 nm 644 nm 635 nm 632 nm
At thickness 0.2 mm 0.11 mm 0.3 mm 0.3 mm 0.21 mm 0.21 mm 0.175 mm

High steepness of NIR cut

BG18, BG38, BG39, BG40, BG42, BG55, S8612 

These glasses provide a number of excellent optical properties, including high transmission and blocking with a very narrow transition range. They are also ideal bandpass filters for visual areas when high absorption in the near infrared (NIR) wavelength range is required. The slope of the IR edge is exceptional and guarantees a sharp distinction between visible light and NIR radiation.

 

NIR cut filters at different thicknesses

8-SCHOTT-NIR-Cutoff-Filter-Blue-Filter-May-2018-ROW_759px.png 

 

BG18 BG38 BG39 BG40 BG42 BG55 S8612
Refractive index ne 1.5358 1.5291 1.5383 1.5320 1.5419 1.5418 1.5422
nd 1.5340 1.5272 1.5363 1.5300 1.5400 1.5398 1.5402
Cutoff wavelength λ0.5 595 nm 646 nm 603 nm 635 nm 595 nm 596 nm 599 nm
At thickness 1 mm

NVIS-compatible

S8022, S8023, VG20

NVIS-compatible glasses have an exceptional strong blocking for wavelengths above 630 nm. This makes them the perfect filter for displays and controls that are compatible with night vision googles (NVIS equipment). The filters enable the observer to recognize the correct colors of the displays and controls in aircraft cockpits.

The glasses S8022 and S8023 are optimized for NVIS Green A, while VG20 has been designed for NVIS white for LED light sources.

 

Comparison of NIR cut filters at different thicknesses

NIR cut-off filters at different thicknesses chart

 

S8022 S8023 VG20
Refractive index ne 1.5595 1.5437 1.5427
nd 1.5550 1.5410 1.5405
Cutoff wavelength λ0.5 533 nm 565 nm 562 nm
At thickness 1 mm
NVIS Green A at
Planck illumination
(1550 K - 3200 K)		 NVIS White at
neutral and warm
white LED light

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Whether you need more information, samples, a quote, or advice for a project, we would be delighted to talk to you.

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