87-891 12.5 mm Dia. Hard Coated OD 4.0 10nm Bandpass Filter; t=3.5 mm 810nm

The 87-891 is a Bandpass Filter with a diameter of 12.5 mm, sourced from the reputable optical components vendor, Edmund Optics. This filter is specifically designed for use with a central wavelength of 810nm, making it suitable for applications that require precise wavelength selection.

The filter boasts a hard coating on both the front and back surfaces, denoted as 'edm 87-891'. This coating enhances the filter's durability, making it resistant to scratches and other forms of damage, thereby ensuring longevity and reliable performance.

The physical data of the filter indicates a cut-on wavelength of 805nm and a cut-off wavelength of 815nm. This 10nm bandpass, combined with the central wavelength, allows for a narrow and precise range of wavelengths to pass through the filter.

The filter's geometry includes a thickness of 3.5 mm, which is crucial for determining the filter's placement and alignment within an optical system. The base shape is circular, a common and versatile shape in optical components.

The filter is made from UVFS Mal-1965, a material known for its optical properties. This material, combined with the filter's design, makes the 87-891 an ideal choice for applications that require precise wavelength control and high-quality optical performance.