88-264 12.5 mm Dia. UV-NIR Metallic Based Neutral Density Filter; OD 0.3 190-1700nm

This is the 88-264 Neutral Density Filter from Edmund Optics, a high-quality optical component designed for use in the ultraviolet (UV) and near-infrared (NIR) spectrums. The filter boasts a 12.5 mm diameter and a thickness of 1.5 mm, making it a compact yet robust solution for various optical applications.

The filter is made from a metallic-based material, specifically UVFS Mal-1965, which is known for its excellent optical properties in the UV and NIR ranges. This material ensures high transmittance and low absorption, making it ideal for applications where maintaining the integrity of the light signal is crucial.

The filter features a neutral density of 0.3, often denoted as ND 0.3. This means it reduces the intensity of the incident light by a factor of 2, offering a balanced reduction across the entire spectrum without introducing any color bias. This makes it a versatile tool for applications where light intensity needs to be controlled, such as in imaging, spectroscopy, and laser applications.

The filter's coating is another notable feature. Both the front and back surfaces are coated with EDM 88-264, a proprietary coating developed by Edmund Optics. This coating enhances the filter's performance by reducing surface reflections and improving transmission. It also provides excellent environmental stability, ensuring the filter maintains its performance even under harsh conditions.

The filter's geometry is that of a thin lens, which not only contributes to its compactness but also minimizes optical aberrations. This makes it an excellent choice for applications where high optical quality is required.