67-851 25 mm Dia. Mounted Traditional Coated Bandpass Interference Filter; t=5.9mm 840nm
- Type
- Filter
- Subtype
- Bandpass Filter
- Brand
- Edmund Optics
Properties
- Shape
- Circular
- Diameter
- 25 mm
- Cut Off Frequency
- 845 nm
- Cut On Frequency
- 835 nm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4526553935685995
- λ
- 840 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
67-851 25 mm Dia. Mounted Traditional Coated Bandpass Interference Filter; t=5.9mm 840nm
The 67-851 is a mounted traditional coated bandpass interference filter, designed and manufactured by Edmund Optics. This filter is characterized by its circular shape and thin lens design, making it suitable for a wide range of applications. The filter has a diameter of 25 mm and a thickness of 5.9 mm, providing a compact yet robust structure.
The filter's primary function is to allow light in a specific wavelength range to pass through while blocking other wavelengths. In this case, the cut-on wavelength is 835 nm, and the cut-off wavelength is 845 nm, with a central wavelength (CWL) of 840 nm. This makes it ideal for applications that require the selective filtering of light around this wavelength.
The filter's coating is another crucial aspect. Both the front and back surfaces are coated with EDM 67-784, a specific coating type that enhances the filter's performance and durability. This coating ensures optimal light transmission and reduces unwanted reflections, contributing to the filter's overall efficiency.
The filter is currently in stock and can be purchased directly from the Edmund Optics website using the provided weblink. The catalog number, 67-851, can be used for easy reference and identification.