NENIR20B Dia. 25 mm Unmounted NIR Absorptive ND Filter; OD 2.0
- Type
- Filter
- Subtype
- Neutral Density Filter
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 25 mm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4440236216729967
- λ
- 1550 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
NENIR20B Dia. 25 mm Unmounted NIR Absorptive ND Filter; OD 2.0
The NENIR20B is a circular Neutral Density Filter, with a diameter of 25 mm and a thickness of 1.3 mm, sourced from Thorlabs. This filter is designed for use in the near-infrared (NIR) region of the spectrum, specifically at a wavelength of 1550 nm.
The NENIR20B features a thin lens shape and is made from UVFS material with the catalog number MAL-1965. It comes with a front and back coating of 'tho nenir20b', which provides excellent absorptive properties.
The filter's Neutral Density (ND) properties are characterized by an Optical Density (OD) of 2.0. This means that it reduces the intensity of incident light by a factor of 100, making it an ideal choice for applications that require significant light reduction while maintaining color neutrality.
The filter is unmounted, providing users with the flexibility to integrate it into their optical systems as needed. It is currently in stock and available for purchase through the Thorlabs website, as indicated by its weblink status.
