685DIJ12 12.5 mm Dia. Standard Interference Bandpass Filter 685nm
- Type
- Filter
- Subtype
- Bandpass Filter
- Brand
- Knight Optical
Properties
- Shape
- Circular
- Diameter
- 12.5 mm
- Cut Off Frequency
- 690 nm
- Cut On Frequency
- 680 nm
Material
- Name
- UVFS
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.455642801682529
- λ
- 685 nm
- B1
- 0.6961663
- C1
- 0.004679148 μm2
- B2
- 0.4079426
- C2
- 0.013512063 μm2
- B3
- 0.8974794
- C3
- 97.93400254 μm2
685DIJ12 12.5 mm Dia. Standard Interference Bandpass Filter 685nm
The 685DIJ12 is a 12.5 mm diameter Standard Interference Bandpass Filter, specifically designed to center at 685nm. This filter is sourced from Knight Optical, a renowned vendor known for their high-quality optical elements.
The filter is a Bandpass type, which means it allows transmission of light within a specific range of wavelengths while blocking other wavelengths. In this case, the cut-on wavelength is 680nm, and the cut-off wavelength is 690nm, making it highly effective in isolating the 685nm wavelength.
The 685DIJ12 is made from UVFS Mal- 1965, a material specifically chosen for its optical properties. It has a thickness of 6.1mm, which is sufficient to maintain its structural integrity and optical performance.
The coating on both the front and back surfaces of the filter is KNI 685DIJ. This coating is crucial as it enhances the filter's performance by ensuring the specified wavelength transmission range.
The filter's shape is a Thin Lens, which is a common shape for optical elements due to its minimal thickness and weight. This makes it easy to integrate into various optical systems.
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