ND2R20B Dia. 50 mm Unmounted Reflective ND Filter; Optical Density 2.0
- Type
- Filter
- Subtype
- Neutral Density Filter
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50 mm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5150823520020043
- λ
- 633 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
ND2R20B Dia. 50 mm Unmounted Reflective ND Filter; Optical Density 2.0
The ND2R20B is a circular Neutral Density Filter with a diameter of 50 mm and a thickness of 2 mm, manufactured by Thorlabs. This filter is designed to reduce the intensity of incident light without altering its color composition, making it an ideal tool for various optical applications.
The filter's primary coating, denoted as 'tho nd20' on both the front and back surfaces, contributes to its neutral density properties. This coating is responsible for the filter's optical density of 2.0, which signifies a significant 100x reduction in light intensity. This makes the ND2R20B particularly useful in high-intensity lighting scenarios or when longer exposure times are required.
The filter is constructed from N-BK7 Schott glass, a material known for its excellent optical properties and durability. This, coupled with the filter's thin lens shape, ensures minimal distortion and maintains the integrity of the optical path.
The ND2R20B is currently in stock and available for purchase through the Thorlabs website. For more information, including technical specifications and purchasing details, please refer to the provided weblink.
