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685FIJ25 25 mm Dia. Standard Interference Bandpass Filter 685nm

685FIJ25 25 mm Dia. Standard Interference Bandpass Filter 685nm

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

Properties

Shape
Circular
Diameter
25 mm
Cut Off Frequency
690 nm
Cut On Frequency
680 nm

Material

Name
UVFS
Dispersion Equation
Sellmeier
n (λ)
1.455642801682529
λ
685 nm
B1
0.6961663
C1
0.004679148 μm2
B2
0.4079426
C2
0.013512063 μm2
B3
0.8974794
C3
97.93400254 μm2

685FIJ25 25 mm Dia. Standard Interference Bandpass Filter 685nm

The 685FIJ25 is a 25 mm diameter Standard Interference Bandpass Filter, specifically designed to transmit light in the 685nm wavelength range. This filter is sourced from Knight Optical, a reputable vendor known for their high-quality optical components.

The filter is made of UVFS Mal- 1965 material, a choice that ensures durability and reliability. It features a circular base shape and a thin lens design, making it suitable for a wide range of optical applications. The filter's geometry includes a diameter of 25mm and a thickness of 6.1mm, providing a balance between compactness and robustness.

The 685FIJ25 has a cut-on wavelength of 680nm and a cut-off wavelength of 690nm, with a central wavelength (CWL) of 685nm. This specificity in wavelength transmission makes it an ideal component for applications that require narrow-band light filtering.

The filter's coating is KNI 685Dij on both the front and back surfaces. This coating enhances the filter's performance by reducing unwanted reflections and increasing transmission in the desired wavelength range.

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