69-894 25 mm Dia. Dichroic Longpass Filter; t=1.05mm 800nm

The 69-894 Dichroic Longpass Filter is a circular filter with a 25 mm diameter and a thickness of 1.05 mm, sourced from the reputable vendor Edmund Optics. This filter is designed for use in optical systems that require longpass filtering at the 800 nm wavelength.

The filter is cut on at 800 nm, meaning it begins to transmit light at this wavelength and beyond. It has no specified cut off wavelength, indicating that it continues to transmit all longer wavelengths. This makes it ideal for applications where the goal is to filter out shorter wavelengths and pass longer ones.

The filter's coating is a crucial component of its functionality. Both the front and back surfaces of the filter are coated with EDM 69-872, a coating that contributes to the filter's longpass characteristics. This coating ensures the filter's performance is consistent across both surfaces, providing reliable and predictable optical behavior.

The filter's geometry is that of a thin lens, which can be beneficial in certain optical system designs. This, combined with its 25 mm diameter, makes it a versatile option for a wide range of applications.

For more detailed information, including availability and pricing, please refer to the vendor's website using the provided weblink.