615FDL25 25 mm Dia. Longpass Dichroic Filter 615nm
- Type
- Filter
- Subtype
- Dichroic Filter
- Brand
- Knight Optical
Properties
- Shape
- Circular
- Diameter
- 25 mm
- Cut Off Frequency
- Cut On Frequency
- 615 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
615FDL25 25 mm Dia. Longpass Dichroic Filter 615nm by Knight Optical
The 615FDL25 is a high-quality dichroic filter, specifically designed for longpass applications, with a cut-on wavelength of 615nm. This filter, sourced from Knight Optical, is a circular element, boasting a diameter of 25mm and a thickness of 1.1mm, making it an ideal choice for various optical systems.
The filter is constructed from N-BK7 Schott, a widely used optical glass due to its excellent optical properties and high homogeneity. This material ensures the filter delivers reliable and consistent performance. The filter's coating, KNI 615FDL-0, is applied to both the front and back surfaces, further enhancing its functionality.
The 615FDL25's physical data is also noteworthy. It has a cut-on wavelength of 615nm, meaning it starts transmitting light at this wavelength, and a cut-off wavelength of 0nm, indicating it transmits all wavelengths below its cut-on wavelength. This makes it an excellent choice for applications where longpass filtering is required.
In terms of geometry, the filter is shaped as a thin lens, which can be beneficial in certain optical configurations. The filter is currently in stock and available for immediate purchase through the provided weblink.