NIR Near-Infrared Polarizing Film
NIR polarizing film is designed for polarization control in the near-infrared wavelength range, especially around 800 nm, 850 nm, 900 nm and 950 nm.
Unlike delicate wire-grid polarizers that require careful surface handling, the MIR35 series can be handled more like standard polarizer film, making it easier to cut, clean and integrate into optical systems.
What NIR Polarizing Film Is Used For
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Reflection and halation control in near-infrared imagingThis film helps reduce glare, reflection, backlight and halation in near-infrared optical systems. It is useful in camera-based systems that use NIR illumination, such as biometric recognition, vein observation, iris imaging, driver monitoring, sensors and machine vision. Related products: linear polarizer film | |
NIR Polarizing Film Product Lineup and Price
| Product | Coating Type | Adhesive | Size | Price |
| MIR35-LR | Low-Reflection | - | 300 x 200 mm t = 0.283 mm |
$320 |
| MIR35-LR-Smpl | Low-Reflection | - | 150 x 100 mm t = 0.283 mm |
$115 |
| MIR35S-LR | Low-Reflection | Yes | 300 x 200 mm t = 0.298 mm |
$320 |
| MIR35S-LR-Smpl | Low-Reflection | Yes | 150 x 100 mm t = 0.298 mm |
$115 |
| MIR35-HC | Hard-Coat | - | 300 x 200 mm t = 0.283 mm |
$320 |
| MIR35-HC-Smpl | Hard-Coat | - | 150 x 100 mm t = 0.283 mm |
$115 |
| MIR35S-HC | Hard-Coat | Yes | 300 x 200 mm t = 0.298 mm |
$320 |
| MIR35S-HC-Smpl | Hard-Coat | Yes | 150 x 100 mm t = 0.298 mm |
$115 |
| Lot discounts available for orders of 10+ sheets. | ||||
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Without Adhesive
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With Adhesive
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Features of MIR35 Series NIR Polarizing Film
| Comparison Point | MIR35 Series | Wire-Grid Type |
|---|---|---|
| Stray reflection / scattering | Does not occur in the same way as wire-grid surface structures. | May occur depending on surface structure and optical geometry. |
| Handling | Can be handled like general polarizer film. | Surface contact and rubbing may require special care. |
| Cutting workability | Similar to general film. | May require special cutting or handling methods. |
| Durability | High durability under severe conditions. | May be affected by temperature, humidity and surface exposure. |
Coating Types: Low-Reflection LR and Hard-Coat HC
Low-Reflection Type <LR>Equipped with a low-reflection function for applications where higher light transmittance and reduced reflection are important. LR type may have a stain-resistant surface, so adhesive bonding should be evaluated with the actual material and process. |
Hard-Coat Type <HC>Equipped with a scratch-resistant hard-coat surface. It is suitable where handling durability is important. HC type may have slightly lower light transmittance than LR type, but it can be bonded to the HC surface using adhesive or PSA after evaluation. |
Applications of Near-Infrared Polarizing Film
| Application | Wavelength Range | Effect / Usage |
|---|---|---|
| Automotive cameras | Near-infrared, approx. 600-1050 nm | Reflection and glare reduction |
| Surveillance cameras | Near-infrared, approx. 600-1050 nm | Reflection control under NIR illumination |
| Biometric authentication, vein / iris recognition | Near-infrared, approx. 600-1050 nm | Improved image contrast and halation reduction |
| Semiconductor inspection systems | Near-infrared, approx. 600-1050 nm | Polarization control for inspection optics |
| Industrial inspection cameras | Near-infrared, approx. 600-1050 nm | Glare and reflection reduction |
| Fundus / ophthalmic imaging devices | Near-infrared, approx. 600-1050 nm | Optical noise reduction for imaging systems |
| Sorting machines, such as fruit sorting | Near-infrared, approx. 600-1050 nm | Contrast improvement in NIR inspection |
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Biometrics and Machine VisionIn NIR imaging systems, polarizing film can reduce unwanted reflection from illumination sources and improve visibility of target features. It is especially useful where the system uses near-infrared light for recognition, inspection or sensing. |
Durability of MIR35 Series NIR Polarizer Film
| Test | Conditions | Judgment Criteria |
|---|---|---|
| High-temperature durability | 105 °C x 500 h |
After testing, the single transmittance at 870 nm ((Tpol-p + Tpol-c) / 2) shall remain within ±5 points of the initial value. After testing, the degree of polarization at 870 nm shall remain within -3 points from the initial value. No peeling or cracks caused by thermal shock, and no abnormal visual appearance. |
| Heat-and-humidity durability | 60 °C x 90% RH x 500 h | |
| Low-temperature durability | -40 °C x 1000 h | |
| Thermal shock | -40 °C x 0.5 h ⇔ +85 °C x 0.5 h - 200 cycles |
Spectral Characteristics and Degree of Polarization
| 800 nm | 850 nm | 900 nm | 950 nm | |
|---|---|---|---|---|
| Parallel Transmittance (%) | 75.37 | 72.97 | 72.67 | 74.57 |
| Crossed Transmittance (%) | 0.103 | 0.017 | 0.028 | 0.059 |
| Degree of Polarization (%) | 99.73 | 99.95 | 99.92 | 99.84 |
Optical performance can vary depending on wavelength, incident angle, light source, sensor sensitivity, substrate, adhesive condition and installation method. Please evaluate the actual MIR35 type with your optical system before production use.
Please tell us your wavelength, required size, adhesive preference and application
— send us an inquiry.
FAQ - NIR Near-Infrared Polarizing Film
See also: Wire Grid Polarizer Film | Linear Polarizer Film | Polarizer Film Lineup