NE2R40B Dia. 2 in Absorptive ND Filter; Optical Density 4.0
- Type
- Filter
- Subtype
- Neutral Density Filter
- Brand
- Thorlabs
Properties
- Shape
- Circular
- Diameter
- 50.8 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
NE2R40B Dia. 2 in Absorptive ND Filter; Optical Density 4.0
The NE2R40B is a Neutral Density Filter from Thorlabs, designed with a circular base shape and a diameter of 2 inches. This filter is made of n-bk7 schott material, ensuring high-quality performance and durability. The filter features a thickness of 2.8 mm, making it suitable for various optical applications.
The NE2R40B boasts a wavelength of 633 nm, providing precise optical density. The coating on both the front and back of the filter is tho ne40a, which is an absorptive neutral density coating. This coating is designed to reduce the intensity of incident light without altering its color composition.
The filter's shape is thin lens, which is beneficial for applications that require minimal thickness and weight. The catalog number for this item is NE2R40B, and it is currently in stock. For more information, you can visit the vendor's website through the provided weblink.
