655FDL50 50 x 50 mm Longpass Dichroic Filter 655nm
- Type
- Filter
- Subtype
- Dichroic Filter
- Brand
- Knight Optical
Properties
- Shape
- Rectangular
- Cut Off Frequency
- Cut On Frequency
- 655 nm
Material
- Name
- N-BK7
- Dispersion Equation
- Sellmeier
- n (λ)
- 1.5167817367777034
- λ
- 588 nm
- B1
- 1.03961212
- C1
- 0.00600069867 μm2
- B2
- 0.231792344
- C2
- 0.0200179144 μm2
- B3
- 1.01046945
- C3
- 103.560653 μm2
655FDL50 50 x 50 mm Longpass Dichroic Filter 655nm
The 655FDL50 is a high-quality dichroic filter, measuring 50 x 50 mm, manufactured by Knight Optical. This filter is designed to transmit light at wavelengths above 655nm while reflecting or absorbing shorter wavelengths, making it a longpass filter.
The filter is made from N-BK7 Schott, a widely used optical glass due to its excellent optical properties and durability. It has a thickness of 1.1mm, providing robustness and stability. The filter's geometry is rectangular, a common shape for optical components due to its ease of handling and integration into optical systems.
The 655FDL50 features a coating of 'kni 655fdl-0' on both the front and back surfaces, enhancing its longpass filter properties. This coating ensures a sharp cut-on wavelength at 655nm, allowing for precise wavelength selection in various applications.
The physical data of the filter indicates a cut-on wavelength of 655nm and a cut-off wavelength of 0nm. This means that the filter starts transmitting light at 655nm and continues to do so for longer wavelengths, while blocking or reflecting shorter wavelengths.
