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87-869 25 mm Dia. Hard Coated OD 4.0 50nm Bandpass Filter; t=3.5 mm 1475nm

87-869 25 mm Dia. Hard Coated OD 4.0 50nm Bandpass Filter; t=3.5 mm 1475nm

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
1500 nm
Cut On Frequency
1450 nm

Material

Name
UVFS
Dispersion Equation
Sellmeier
n (λ)
1.4449111134136852
λ
1475 nm
B1
0.6961663
C1
0.004679148 μm2
B2
0.4079426
C2
0.013512063 μm2
B3
0.8974794
C3
97.93400254 μm2

87-869 25 mm Dia. Hard Coated OD 4.0 50nm Bandpass Filter; t=3.5 mm 1475nm

The 87-869 is a Bandpass Filter, sourced from Edmund Optics, with a catalog number 87-869. This filter is specifically designed for use in optical systems requiring a narrow bandwidth transmission centered at 1475nm. The filter features a circular shape with a diameter of 25mm and a thickness of 3.5mm, making it compatible with a wide range of optical systems.

The 87-869 filter is constructed with a hard coating on both the front and back surfaces, providing enhanced durability and resistance to scratches and other forms of damage. The coating material is UVFS Mal- 1965, which is known for its excellent optical properties.

The filter's physical data includes a cut-on wavelength of 1450nm and a cut-off wavelength of 1500nm, with a center wavelength (CWL) of 1475nm. This narrow bandwidth transmission characteristic makes it ideal for applications requiring high spectral purity and rejection of out-of-band light.

The filter's coating is Edmund Optics' 87-856, which is a broadband anti-reflection coating designed to minimize reflection losses across the visible and near-infrared spectral regions. This coating ensures high transmission efficiency and reduces the risk of unwanted reflections within the optical system.

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