88-281 50 mm Dia. UV-NIR Metallic Based Neutral Density Filter; OD 2 190-1700nm

The 88-281 is a Neutral Density Filter with a 50 mm diameter, sourced from the renowned optical components vendor, Edmund Optics. This filter is designed for use in the ultraviolet (UV) and near-infrared (NIR) spectrum, making it an ideal choice for applications that require broadband attenuation.

The filter boasts a Metallic Based Neutral Density coating, denoted as 'uvfs mal- 1965', on both the front and back surfaces. This coating is responsible for the filter's primary function: reducing the intensity of light passing through it without altering the color composition. The coating provides an Optical Density (OD) of 2, which equates to a 100:1 reduction in light intensity across the entire UV-NIR spectrum (190-1700nm).

The filter's geometry is another notable feature. It has a thickness of 5mm, which contributes to its durability and overall structural integrity. The circular shape, a common form factor in optical components, ensures ease of integration into various systems.

The 88-281 filter is designed with a 'Thin Lens' shape, which implies a flatter profile compared to traditional lens shapes. This design can be beneficial in applications where space is at a premium, or where minimal optical path deviation is required.