85-897 25 mm Dia. Hard Coated OD 4.0 50nm Bandpass Filter; t=3.5 mm 1250nm

The 85-897 is a Bandpass Filter, specifically designed by Edmund Optics with a diameter of 25 mm and a thickness of 3.5 mm. This filter is part of the UVFS MAL-1965 material ID family, which ensures high-quality performance and durability.

The Bandpass Filter is a type of optical filter that allows only a specific range of wavelengths to pass through it, while blocking other wavelengths. In this case, the 85-897 filter is designed to allow wavelengths around 1250nm to pass through, with a cut-on wavelength of 1225nm and a cut-off wavelength of 1275nm. This specificity in wavelength management makes it an ideal choice for applications that require precise wavelength control.

The filter features hard coating on both the front and back, specifically the EDM 85-885 coating. This coating enhances the filter's durability and resistance to environmental factors, ensuring a longer lifespan and maintaining its performance over time.

The 85-897 filter is designed in a Thin Lens shape, which is a type of optical element with a curved, lens-like surface. This shape allows for more precise control over the light passing through the filter, further enhancing its performance in wavelength management.

The filter is currently in stock and available for purchase through the Edmund Optics website, as indicated by its valid weblink status. With its specific wavelength range, hard coating, and Thin Lens shape, the 85-897 is a versatile and reliable choice for various optical applications.