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85-893 25 mm Dia. Hard Coated OD 4.0 50nm Bandpass Filter; t=3.5 mm 1050nm

85-893 25 mm Dia. Hard Coated OD 4.0 50nm Bandpass Filter; t=3.5 mm 1050nm

Type
Filter
Subtype
Bandpass Filter
Brand
Edmund Optics
Product webpage
Edmund Optics products in the 3DOptix catalog

Properties

Shape
Circular
Diameter
25 mm
Cut Off Frequency
1075 nm
Cut On Frequency
1025 nm

Material

Name
UVFS
Dispersion Equation
Sellmeier
n (λ)
1.4497997592599141
λ
1050 nm
B1
0.6961663
C1
0.004679148 μm2
B2
0.4079426
C2
0.013512063 μm2
B3
0.8974794
C3
97.93400254 μm2

85-893 25 mm Dia. Hard Coated OD 4.0 50nm Bandpass Filter; t=3.5 mm 1050nm

The 85-893 is a Bandpass Filter, specifically designed for use in optical systems that require a narrow bandwidth of light to pass through while blocking other wavelengths. This filter, sourced from Edmund Optics, boasts a center wavelength (CWL) of 1050nm, making it ideal for applications that necessitate precise filtering within this spectral range.

The filter is circular in shape, with a diameter of 25mm, providing a substantial surface area for light to interact with. It has a thickness of 3.5mm, which contributes to its robustness and durability. The 85-893 filter is hard coated, enhancing its resistance to wear and tear, a crucial factor for components that are frequently exposed to handling or harsh environments.

The physical data of the filter is equally impressive. It is cut on at 1025nm and cut off at 1075nm, ensuring a tight bandpass around the CWL. This precise control over the passband is crucial for many applications, including spectroscopy, fluorescence microscopy, and laser technology.

The filter's coating is another notable feature. Both the front and back surfaces are coated with EDM 85-881, a coating that likely enhances the filter's performance and longevity. The shape of the filter is thin lens, suggesting that it may have additional optical properties beyond simple bandpass filtering.

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