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NE40B-B Dia. 25 mm AR-Coated Absorptive Neutral Density Filter; 650-1050nm; OD 4.0 AR 650-1050nm

NE40B-B Dia. 25 mm AR-Coated Absorptive Neutral Density Filter; 650-1050nm; OD 4.0 AR 650-1050nm

Type
Filter
Subtype
Neutral Density Filter
Brand
Thorlabs
Product webpage
Thorlabs products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
25 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

NE40B-B Dia. 25 mm AR-Coated Absorptive Neutral Density Filter; 650-1050nm; OD 4.0 AR 650-1050nm

The NE40B-B is a Neutral Density Filter, part of the extensive catalog of optical elements offered by Thorlabs. This absorptive filter, with a catalog number NE40B-B, is specifically designed for use within the 650-1050nm wavelength range, providing excellent optical density (OD) of 4.0.

The filter boasts a circular shape, with a diameter of 25 mm and a thickness of 2.8 mm, making it compatible with a wide range of optical systems. The NE40B-B filter features a Thin Lens shape, which is beneficial for maintaining the integrity of the optical path in your setup.

The front and back surfaces of the filter are coated with AR (Anti-Reflective) coatings, specifically designed for the 650-1050nm wavelength range. This coating helps minimize surface reflections, thereby reducing the overall loss of light and improving the overall performance of your optical system.

The NE40B-B filter is currently in stock and available for immediate purchase through the Thorlabs website. For more detailed information, you can visit the product page at https://www.thorlabs.com/thorproduct.cfm?partnumber=NE40B-B.

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