420FDL25 25 mm Dia. Longpass Dichroic Filter 420nm

The 420FDL25 is a Dichroic Filter, specifically designed for longpass applications with a cut-on wavelength of 420nm. This filter is sourced from Knight Optical, a reputable vendor known for their high-quality optical components. The filter is designed with a circular shape, featuring a diameter of 25mm and a thickness of 1.1mm, making it suitable for a wide range of optical applications.

The filter is made from N-BK7 Schott, a popular optical glass due to its excellent optical properties and high damage threshold. The coating on both the front and back of the filter is KNI 420FDL-0, which is specifically designed to achieve the desired longpass characteristics.

The physical data of the filter indicates a cut-on wavelength of 420nm, meaning it starts transmitting light at this wavelength and beyond. The cut-off wavelength is 0nm, indicating that it transmits all wavelengths longer than 420nm. This makes it ideal for applications where you want to filter out shorter wavelengths and pass longer ones.

The filter is designed in a Thin Lens shape, which is a simple lens with both sides of the lens parallel to each other. This shape is often used in optical systems where a simple lens is required.

The filter is currently in stock and available for purchase on Knight Optical's website. For more information, you can visit the provided weblink.