The 85-892 is a 25 mm diameter Bandpass Filter, supplied by Edmund Optics, with a center wavelength of 1000nm. This filter is designed to transmit light within a specific range of wavelengths while blocking other wavelengths, making it ideal for applications requiring narrowband light transmission.
The filter features a hard coating on both the front and back surfaces, identified as EDM 85-880. This coating enhances the filter's durability and resistance to environmental factors, ensuring long-term performance and reliability.
The physical dimensions of the filter include a diameter of 25mm and a thickness of 3.5mm. The cut-on wavelength is 975nm, and the cut-off wavelength is 1025nm, providing a relatively narrow bandwidth for precise light filtering. The CWL, or Central Wavelength, is 1000nm, indicating the midpoint of the filter's transmission range.
This filter is designed in the shape of a thin lens, which can be beneficial in certain optical systems where minimal thickness is required. The catalog number for this item is 85-892, and it is currently in stock, according to the vendor's website.