89-664 25 mm Dia. High Performance OD 4.0 Longpass Filter; t=3 mm 1300nm

The 89-664 is a high-performance longpass filter, measuring 25 mm in diameter and 3 mm in thickness, sourced from Edmund Optics. This filter is designed for use in optical systems that require longpass filtering at a cut-on wavelength of 1300nm.

The filter features a circular shape and is made from UVFS Mal-1965 material, a common choice for optical applications due to its excellent transmission characteristics and durability. The filter's longpass properties allow it to block shorter wavelengths while transmitting longer wavelengths, making it ideal for applications such as infrared spectroscopy, night vision, and heat-seeking technology.

The 89-664 is coated on both the front and back surfaces with EDM 89-660, a high-performance coating that enhances the filter's durability and performance. This coating helps to reduce surface reflections and increase transmission, ensuring optimal performance in your optical system.

The filter's thin lens shape allows it to be easily integrated into various optical systems, while its 25 mm diameter provides a large enough aperture for most applications. The filter is currently in stock and available for purchase through the Edmund Optics website, as indicated by its valid weblink status.