680FIB12 12.5 mm Dia. Standard Interference Bandpass Filter 680nm
- Type
- Filter
- Subtype
- Bandpass Filter
- Brand
- Knight Optical
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- Cut Off Frequency
- 685 nm
- Cut On Frequency
- 675 nm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.4557635703408012
- λ
- 680 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
680FIB12 12.5 mm Dia. Standard Interference Bandpass Filter 680nm
The 680FIB12 is a 12.5 mm diameter Standard Interference Bandpass Filter, specifically designed to operate at a central wavelength of 680nm. This filter is sourced from Knight Optical, a reputable vendor known for their high-quality optical elements.
The filter is of the Bandpass type, which means it allows transmission of light within a specific range of wavelengths while blocking out other wavelengths. In this case, the passband ranges from 675nm to 685nm, making it ideal for applications that require narrow-band light in the red spectrum.
The 680FIB12 is made from UVFS Mal-1965, a material known for its excellent optical properties. It features a Thin Lens shape, which is beneficial for applications where minimal thickness is required. The filter has a diameter of 12.5mm and a thickness of 6.1mm, providing a good balance between robustness and compactness.
The filter's coating is another notable feature. Both the front and back surfaces are coated with KNI 680DIB, a coating specifically designed to enhance the filter's performance. This coating helps to ensure high transmission within the passband and low reflection at the filter's surfaces.