12-015 12.5 mm Dia. Infrared (IR) Neutral Density Filter; OD 2 2-14µm

This is a 12.5 mm diameter Infrared (IR) Neutral Density Filter, model number 12-015, sourced from the reputable optical components vendor, Edmund Optics. The filter is designed with a Thin Lens shape and has a thickness of 1 mm, contributing to its compactness and ease of integration into various optical systems.

The filter is made of Germanium Burnett, a material known for its excellent optical properties, particularly in the infrared spectrum. It has an Optical Density (OD) of 2, which means it reduces the intensity of incident light by a factor of 100. This feature is crucial in applications where controlling light intensity is paramount, such as in high-power laser systems or infrared imaging devices.

The filter's Neutral Density nature ensures that it attenuates all wavelengths of light equally, maintaining the color balance of the incident light. This makes it an ideal choice for applications where color fidelity is a critical factor.

The filter's coating, 'edm 12-015', is applied on both the front and back surfaces. While the specifics of this coating are not provided in the data, it generally serves to enhance the filter's performance, such as by reducing surface reflections or increasing durability.