635FDL12 12.5 mm Dia. Longpass Dichroic Filter 635nm

The 635FDL12 is a Dichroic Filter, specifically a Longpass Filter with a 635nm cut-on wavelength, sourced from Knight Optical. This filter is designed for use in optical systems that require the separation or blocking of specific wavelengths of light.

The filter is circular in shape, with a 12.5mm diameter and a thickness of 1.1mm, making it suitable for a wide range of applications. It 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 635FDL-0, which is specifically designed for longpass applications at 635nm. This coating ensures high transmission of wavelengths above the cut-on point and high reflection of wavelengths below it.

The physical data of the filter indicates that it is cut-on at 635nm, meaning it starts to transmit light at this wavelength, and it has no specified cut-off wavelength, indicating that it will continue to transmit all longer wavelengths.

This filter is currently in stock and available for immediate purchase from Knight Optical's website.