66-236 25 mm Dia. Hard Coated High Performance OD 4.0 Longpass Filter; t=3 mm 850nm

The 66-236 is a high-performance longpass filter, designed and manufactured by Edmund Optics. This filter is part of their extensive catalog, which includes a wide variety of optical elements sourced from vendors around the globe. The 66-236 is a circular filter, with a diameter of 25 mm and a thickness of 3 mm, making it suitable for a wide range of optical applications.

The filter is constructed from UVFS Mal-1965, a material known for its optical properties. It is designed to cut on at 850 nm, allowing light of longer wavelengths to pass through while blocking shorter wavelengths. The cut-off wavelength is 0 nm, indicating that it allows all wavelengths longer than 850 nm to pass through.

The 66-236 features a hard coating on both the front and back, providing enhanced durability and resistance to wear and tear. The coating is identified as EDM 66-228, a high-performance coating known for its optical properties.

The filter's shape is described as a thin lens, suggesting a precise and controlled curvature designed to focus or disperse light in a specific manner. This makes the 66-236 a versatile tool for various optical applications, from imaging and spectroscopy to beam shaping and light control.

According to the provided information, the 66-236 is currently in stock and available for purchase. Further details, including pricing and shipping information, can be found on the Edmund Optics website using the provided weblink.