Et640-20M C 25 mm Dia. Bandpass Filter
- Type
- Filter
- Subtype
- Bandpass Filter
- Brand
- Chroma
Properties
- Shape
- Circular
- Diameter
- 25 mm
- Cut Off Frequency
- 650 nm
- Cut On Frequency
- 630 nm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4568118189984216
- λ
- 640 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
Et640-20M C 25 mm Dia. Bandpass Filter by Chroma
The Et640-20M is a Bandpass Filter with a circular base shape, designed and manufactured by Chroma. This filter is part of the UVFS MAL-1965 material ID family, ensuring high-quality performance and durability.
The filter has a diameter of 25 mm and a thickness of 1 mm, making it a compact yet effective solution for various optical applications. The Et640-20M is specifically designed for a central wavelength (CWL) of 640 nm, providing precise filtering capabilities for this wavelength.
The physical data of the filter includes a cut-on wavelength of 630 nm and a cut-off wavelength of 650 nm. This means that the filter allows wavelengths between 630 nm and 650 nm to pass through while blocking other wavelengths. This feature is particularly useful in applications where specific wavelength selection is required.
The Et640-20M is coated with Chr Et640 20m on both the front and back surfaces, enhancing its performance and longevity. The filter's shape is that of a Thin Lens, further expanding its potential uses in various optical systems.
According to the vendor's information, the filter is currently in stock and can be purchased directly from Chroma's website using the provided weblink. The link has been validated and found to be functional at the time of writing.
