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ND30B Dia. 25 mm Unmounted Reflective ND Filter; Optical Density 3.0

ND30B Dia. 25 mm Unmounted Reflective ND Filter; Optical Density 3.0

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

Properties

Shape
Circular
Diameter
25 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

ND30B Dia. 25 mm Unmounted Reflective ND Filter; Optical Density 3.0

The ND30B is a circular, unmounted Neutral Density Filter, boasting a diameter of 25 mm and a thickness of 1 mm. Manufactured by Thorlabs, a leading vendor in the optical industry, this filter is made of N-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties.

The ND30B filter is coated with THo ND30 on both the front and back surfaces. This coating is a type of Neutral Density coating, designed to reduce the intensity of incident light without altering its color composition. The Optical Density of this filter is 3.0, which translates to a transmission of approximately 0.1% at the specified wavelength of 633 nm.

This filter is shaped as a Thin Lens, which is a lens with a very small focal length compared to its diameter. This shape allows for minimal optical aberrations and distortions, making it ideal for applications that require high-precision optics.

The filter's status is in stock, and you can find more information about it, including its catalog number and a direct link to its product page on Thorlabs' website, in the item data provided.

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