The 87-854 is a Bandpass Filter, specifically designed with a diameter of 12.5 mm and a thickness of 3.5 mm. This filter is sourced from the reputable vendor, Edmund Optics, and is available for purchase on their website. The catalog number for this item is 87-854, and it can be found with a simple web search.
This Bandpass Filter is hard coated, which enhances its durability and longevity. The filter is designed to pass light within a specific range of wavelengths, which in this case is 1375nm. The cut-on wavelength is 1350nm, and the cut-off wavelength is 1400nm, providing a 50nm bandpass.
The coating on both the front and back of the filter is EDM 87-854, which is a specialized coating designed to optimize the filter's performance. The filter is shaped as a thin lens, which is a common design for optical elements due to its simplicity and effectiveness.