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.