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820DIB12 12.5 mm Dia. Standard Interference Bandpass Filter 820nm

820DIB12 12.5 mm Dia. Standard Interference Bandpass Filter 820nm

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

Properties

Shape
Circular
Diameter
12.5 mm
Cut Off Frequency
825 nm
Cut On Frequency
815 nm

Material

Name
UVFS
Dispersion Equation
Sellmeier
n (λ)
1.4529792355927742
λ
820 nm
B1
0.6961663
C1
0.004679148 μm2
B2
0.4079426
C2
0.013512063 μm2
B3
0.8974794
C3
97.93400254 μm2

820DIB12 12.5 mm Dia. Standard Interference Bandpass Filter 820nm

The 820DIB12 is a 12.5 mm diameter Standard Interference Bandpass Filter, specifically designed to operate at a central wavelength of 820nm. This filter is sourced from Knight Optical, a reputable vendor known for their high-quality optical elements.

The filter is a Bandpass type, which means it allows transmission of light within a specific range of wavelengths while blocking other wavelengths. In this case, the cut-on wavelength is 815nm, and the cut-off wavelength is 825nm, ensuring a tight bandpass around the central wavelength.

The 820DIB12 is made from UVFS MAL-1965, a material known for its optical properties and durability. The filter has a thickness of 6.1mm, which is typical for this type of optical component. The coating on both the front and back surfaces of the filter is KNI 820DIB, a proprietary coating developed by Knight Optical for enhanced performance.

The filter's shape is that of a Thin Lens, which implies that it can focus light to a certain extent, adding to its versatility. The filter is currently in stock and available for immediate purchase through the vendor's website.

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