The 528FWP7575 is a Longpass Filter from Knight Optical, measuring 75 x 75 mm with a thickness of 0.1 mm. This filter is designed to allow light at wavelengths longer than 528nm to pass through while blocking shorter wavelengths. The physical data indicates a cut-on wavelength of 528nm and a cut-off wavelength of 2694nm.
This filter is made of UVFS Mal- 1965 material, a common choice for optical applications due to its excellent transmission properties and durability. The filter features a Thin Lens shape, which is often used in applications where a flat surface is not feasible or desirable.
The coating on both the front and back surfaces of the filter is KNI 528FWP, which is likely a proprietary coating developed by Knight Optical to enhance the performance and durability of their filters. This coating could provide additional protection against environmental factors, scratches, and other potential damage.
The filter is currently in stock and available for purchase on the Knight Optical website. For more information, you can visit the product page at https://www.knightoptical.com/stock/default/wratten-colour-filter-75x75mm-528nm-long-pass.html.