NENIR02B Dia. 25 mm Unmounted NIR Absorptive ND Filter; OD 0.2
- 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
NENIR02B Dia. 25 mm Unmounted NIR Absorptive ND Filter; OD 0.2
The NENIR02B is a circular Neutral Density Filter, unmounted, with a diameter of 25 mm and a thickness of 1.2 mm. This filter is designed for use in the near-infrared (NIR) region of the spectrum, specifically at a wavelength of 1550 nm. The filter is manufactured by Thorlabs, a leading vendor in the field of optical components.
The NENIR02B features a special coating on both the front and back surfaces, identified as 'tho nenir02b'. This coating is designed to absorb specific wavelengths of light, reducing the overall intensity of the light passing through the filter. The absorption coefficient of this filter is 0.2, often referred to as Optical Density (OD) 0.2.
The filter's geometry is shaped as a thin lens, which can be beneficial in certain optical systems where minimal thickness and weight are desirable. The catalog number for this item is NENIR02B, and it can be found on the Thorlabs website, where it is currently in stock.