ND2R13A Dia. 50 mm Reflective ND Filter; SM2-Threaded Mount; Optical Density 1.3
- 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
ND2R13A Dia. 50 mm Reflective ND Filter; SM2-Threaded Mount; Optical Density 1.3
The ND2R13A is a Neutral Density Filter with a diameter of 50 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 features a uniform coating of Optical Density 1.3 on both the front and back surfaces, which corresponds to a 40% transmission of light. This specific density is particularly useful in applications where a moderate reduction in light intensity is required.
The ND2R13A is constructed from N-BK7 Schott glass, a material known for its excellent optical properties and durability. The filter has a thickness of 2 mm, which contributes to its robustness and stability.
The filter is mounted with an SM2-threaded mount, ensuring a secure and reliable connection to your optical system. This mount is compatible with a wide range of Thorlabs' components, providing flexibility in system design.
The filter's geometry is that of a Thin Lens, which implies a minimal thickness relative to its diameter. This design not only reduces weight but also minimizes optical aberrations, contributing to the overall performance of the filter.
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