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645FDL25 25 mm Dia. Longpass Dichroic Filter 645nm

645FDL25 25 mm Dia. Longpass Dichroic Filter 645nm

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
Cut On Frequency
645 nm

Material

Name
N-BK7
Dispersion Equation
Sellmeier
n (λ)
1.5167817367777034
λ
588 nm
B1
1.03961212
C1
0.00600069867 μm2
B2
0.231792344
C2
0.0200179144 μm2
B3
1.01046945
C3
103.560653 μm2

645FDL25 25 mm Dia. Longpass Dichroic Filter 645nm

The 645FDL25 is a Dichroic Filter, specifically designed for longpass applications with a cut-on wavelength of 645nm. This filter is sourced from Knight Optical, a reputable vendor known for their high-quality optical components. The filter is made from N-BK7 Schott, a widely used optical glass due to its excellent optical properties and durability.

The filter has a circular shape with a diameter of 25mm and a thickness of 1.1mm, making it suitable for a wide range of optical systems. The coating on both the front and back surfaces is KNI 645FDL-0, which contributes to its longpass filtering capabilities.

The physical data of the filter indicates that it cuts off wavelengths below the specified 645nm, ensuring that only longer wavelengths pass through. This filter is currently in stock and available for purchase on Knight Optical's website, as indicated by its weblink status.

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