NE2R20A Dia. 2 in Absorptive ND Filter; SM2-Threaded Mount; Optical Density 2.0
- Type
- Filter
- Subtype
- Neutral Density Filter
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 mm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4570121244558207
- λ
- 633 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
NE2R20A Dia. 2 in Absorptive ND Filter; SM2-Threaded Mount; Optical Density 2.0
The NE2R20A is a Neutral Density Filter, specifically designed for applications requiring a significant reduction in light intensity without altering the color balance of the incident light. Manufactured by Thorlabs, this filter boasts a catalog number of NE2R20A and is available for purchase directly from their website, where it is currently in stock.
This circular filter, with a diameter of 50.8 mm, is constructed from UVFS material, identified as MAL-1965 in the material index. It has a thickness of 1.4 mm, making it a slim and lightweight option for your optical setup. The filter features a Thin Lens shape, optimized for minimal distortion and maximum light transmission.
The NE2R20A filter is coated with a specialized coating, denoted as 'tho ne20a' on both the front and back surfaces. This coating enhances the filter's performance by reducing reflections and increasing durability. The coating also ensures the filter maintains its optical density of 2.0 at a wavelength of 633 nm, providing a substantial reduction in light intensity.
