The 87-822 is a Bandpass Filter with a diameter of 12.5 mm, sourced from the reputable vendor, Edmund Optics. This filter is specifically designed for a central wavelength of 1550 nm, making it suitable for applications that require precise filtering within this range.
The filter boasts a hard coating on both the front and back surfaces, denoted as 'edm 87-822'. This coating enhances the filter's durability, making it resistant to wear and tear, a crucial factor for components subjected to frequent handling or harsh environments.
The physical data of the filter reveals a cut-on wavelength of 1537.5 nm and a cut-off wavelength of 1562.5 nm. This 25 nm bandpass, situated between the cut-on and cut-off wavelengths, is where the filter allows maximum transmission, effectively isolating the desired wavelength range from others.
The filter's geometry is another notable feature. It has a thickness of 3.5 mm, which, combined with its circular shape and thin lens design, ensures efficient light transmission and minimal distortion.