This is the 409 DM Dichroic Longpass Fluorescence Filter, a high-quality optical component sourced from Iridian Spectral Technologies. The filter is designed with a rectangular base shape, measuring 35.6 mm in width and 25.2 mm in length, making it suitable for a wide range of optical applications.
The filter has a thickness of 1.05 mm, providing excellent durability and stability. It is cut on 409 nm and has a cut off of 0, making it a longpass filter. The coating on both the front and back surfaces is 'iri 409-dm', which is specifically designed for this type of filter.
The filter is a dichroic filter, which means it reflects one wavelength and transmits another. In this case, the wavelength is 588 nm. This makes it ideal for applications that require the separation of specific wavelengths of light.
The filter is available directly from Iridian Spectral Technologies, and the web link provided in the item data indicates that it is currently in stock. The catalog number for this filter is 409 DM, and more information about it can be found on the vendor's website.