The HPD590 is a 25.5 x 36 mm Fluorescence Longpass Dichroic Filter, specifically designed for use in the 612-675nm wavelength range. This filter is sourced from the reputable vendor MKS/Newport, and it is available for purchase directly from their website.
The filter is a Longpass type, which means it allows transmission of longer wavelengths while blocking shorter ones. This particular model has a base shape of a Rectangle, making it suitable for various optical applications. The filter is made from UVFS material, identified by the Mal-1965 Material ID.
The HPD590 has a thickness of 1mm, ensuring minimal distortion while providing adequate durability. The coating on both the front and back surfaces is 'new hpd590', which is designed to optimize the filter's performance in its intended wavelength range.
The filter's geometry is that of a Thin Lens, suggesting that it may have some light-focusing capabilities. However, this should be confirmed with the manufacturer or through experimental use.