CLAREX Near-Infrared Acrylic Filters (NIR)
Optical grade long pass NIR filters available in a variety of configurations to meet your needs.
CLAREX Acrylic NIR Filters transmit near-infrared (NIR) light and block/absorb visible light. There are several types of NIR filters to choose from with cut-ins from 670nm to 910nm.
For applications where reflections/glare are causing issues, we can supply the NIR sheets with anti-reflection coatings designed specifically for NIR applications. Learn More >
The standard NIR filters block almost all visible light. There is less than 1% visible light transmission. However, sometimes that isn’t enough in the case of super bright light sources. If necessary, we can increase the density of the NIR pigments used in the sheet to further reduce the amount of visible light leaking through.
Benefits
- Transmit NIR light and block/absorb visible
- Optical Grade Cast Acrylic
- No Birefringence
- Low wavefront distortion
- Excellent weatherability and chemical resistance
- Available smooth surface or anti-glare surface
- Available with scratch/chemical resistant coat
- Available with custom-tuned anti-reflection coating
Applications
- Instrumentation
- Sensors
- Communications and Optical Devices
- LIDAR filters
- Machine Vision
- Time of Flight Sensors
- Covert Imaging & Illumination
Thicknesses
- 0.5mm
- 0.6mm
- 0.7mm
- 0.8mm
- 1.0mm
- 1.2mm
- 1.5mm
- 2.0mm
- 2.5mm
- 3.0mm
- 3.5mm
- 4.0mm
- 4.5mm
- 5.0mm
- Custom
Size
- 400mm x 550mm standard
- Custom sizes available upon request
Transmission Curves
| Type No. | Near-Infrared Transmission |
|---|---|
| NIR-70N | Transmit from 670nm |
| NIR-75N | Transmit from 730nm |
| NIR-80N | Transmit from 760nm |
| NIR-85N | Transmit from 810nm |
| NIR-90N | Transmit from 860nm |
| NIR-911N | Transmit from 910nm |
Customization
Custom sheets & parts to meet your application
Do you have a unique design requirement? We can help! Choose the thickness, formulation, additives, color dye/pigments, surface textures, surface coatings, and optical coatings for your custom material configuration, and if we don’t already have it in stock at our warehouse in New York, we can typically have it ready for you in 4-8 weeks. We can even fabricate the finished parts for you.
Physical & Chemical Properties of CLAREX Near-Infrared (NIR) Filters
| Property | Method | Unit | UNCOATED | with HARD-COAT |
|---|---|---|---|---|
| Specific Gravity | ASTM D-792 | 1.19 | 1.19 | |
| Optical | ||||
| Refractive Index | ASTM D-542 | 1.49 | 1.49 (1.54) | |
| Mechanical | ||||
| Elongation | ASTM D-638 | % | 5 | 5 |
| Tensile Rupture Strength | ASTM D-638 | kg/cm2 | 750 | 650 |
| Flexural Rupture Strength | ASTM D-790 | kg/cm2 | 1200 | 800 |
| Thermal | ||||
| Heat Distortion Temperature | °C | 108 | 110 | |
| Maximum Recommended Continuous Temperature | °C | 80 | 80 | |
| Available with higher temperature ratings upon request, 90-95 °C | ||||
| Durability | ||||
| Heat Resistance | 80ºC x 100hr | No Change | No Change | |
| Cold Resistance | -40ºC x 100hr | No Change | No Change | |
| Humidity Resistance | 60ºC x 90% x 100hr | No Change | No Change | |
| Thermal Cycle | -40ºC <> 80ºC (10 cycles) | No Change | No Change | |
| Electrical | ||||
| Surface Resistivity | w | 10^16 | 10^16 | |
| Chemical | ||||
| Methyl Alcohol (50%) | No Change | No Change | ||
| Ethyl Alcohol (50%) | No Change | No Change | ||
| Soap Aqua Solution | No Change | No Change | ||
| Toluene | Dissolved | No Change | ||
| Acetone | Dissolved | No Change | ||
| Benzene | Swollen | No Change | ||
| Ethylene Dichloride | Dissolved | No Change | ||
| Other | ||||
| Pencil Hardness | 2H | >6H | ||
| Adhesion | K-5400 | 100/100 | ||
| Flammability | ||||
| Fire Resistivity | UL standard | >=0.8mm Thickness | 94HB | 94HB |