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521FDN25 25 mm Dia. Bandblocking Dichroic Filter 521nm

521FDN25 25 mm Dia. Bandblocking Dichroic Filter 521nm

Type
Filter
Subtype
Dichroic Filter
Brand
Knight Optical
Product webpage
Knight Optical products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
25 mm
Cut Off Frequency
470 nm
Cut On Frequency
572 nm

Material

Name
N-BK7
Dispersion Equation
Sellmeier
n (λ)
1.52010065619205
λ
521 nm
B1
1.03961212
C1
0.00600069867 μm2
B2
0.231792344
C2
0.0200179144 μm2
B3
1.01046945
C3
103.560653 μm2

521FDN25 25 mm Dia. Bandblocking Dichroic Filter 521nm

The 521FDN25 is a Dichroic Filter, specifically designed for bandblocking applications, with a diameter of 25 mm. This filter, available from Knight Optical, is a high-quality, reliable component for various optical systems.

The filter's primary function is to block light in the 470-572nm range while allowing light at the center wavelength (CWL) of 521nm to pass through. This makes it ideal for applications where specific wavelengths need to be isolated or blocked.

The 521FDN25 is made from N-BK7 Schott, a widely used optical glass due to its excellent optical properties and durability. The filter has a thickness of 1.1mm, providing sufficient structural integrity while minimizing optical distortions.

The coating on both the front and back surfaces of the filter is KNI 521FDN-0. This coating enhances the filter's performance, ensuring efficient light transmission at the desired wavelength and effective blockage of unwanted wavelengths.

The filter's geometry is that of a thin lens, which can be beneficial in certain optical system designs. The 521FDN25 is currently in stock and available for immediate purchase through the Knight Optical website.

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