Semrock's BLP01-633R-25 is a Longpass Filter, designed with a circular shape and a diameter of 25 mm. This filter is made of UVFS Mal-1965 material and has a thickness of 2 mm. The filter's front and back are coated with Semrock's proprietary coating, providing excellent optical performance.
The BLP01-633R-25 filter is designed to cut on at 632.8 nm, allowing all longer wavelengths to pass through. The cut-off wavelength is 0 nm, meaning it allows all wavelengths longer than the cut-on to pass. 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 beneficial for applications where a flat surface is required. The catalog number for this filter is BLP01-633R-25, and it can be found on Semrock's official website. The link is valid and the filter is currently in stock, making it readily available for purchase.