Thorlabs NDIR03A filter

Product Description

Thorlabs NDIR03A Near-Infrared (NIR) Longpass Filter (Unmounted)

The NDIR03A is a high-performance near-infrared longpass filter from Thorlabs, designed to block visible and shorter infrared wavelengths while transmitting infrared light above approximately 3.0 micrometers (µm). This unmounted substrate is ideal for integration into custom optical assemblies, laser beam conditioning, and spectroscopic systems.

Key Specifications:

• Filter Type: Longpass (Cut-On)

• Cut-On Wavelength (CWL): 3.0 µm (3000 nm)

• Transmission: High transmission in the NIR to IR range; blocks UV, visible, and shorter IR.

• Substrate: Likely germanium (Ge), zinc selenide (ZnSe), or other IR-transmitting material.

• Format: Unmounted optical substrate (requires user-provided mounting).

• Diameter/Size: [1″ diameter, 2 mm thickness]

Applications:

• Thermal imaging and pyrometry systems

• CO₂ laser beam delivery (10.6 µm) with visible aiming beam blocking

• Infrared spectroscopy and gas analysis

• Scientific research involving specific IR wavelength isolation