64-359 50 mm Dia. Infrared (IR) Neutral Density Filter; OD 0.5 2-14µm

The 64-359 is a 50 mm diameter Infrared (IR) Neutral Density Filter, offering an Optical Density (OD) of 0.5, specifically designed for the 2-14µm wavelength range. This filter is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase through their website, with the status indicating it is currently in stock.

As a Neutral Density Filter, this item is designed to reduce the intensity of incoming light, across all wavelengths, without altering the color composition. This is particularly useful in applications where controlling light intensity is crucial, without affecting the color balance. The 0.5 OD signifies that the filter reduces the light intensity by a factor of 3.16, offering a moderate level of light reduction.

The filter is constructed with a Circular base shape, made from Germanium Burnett material, and features a Thin Lens geometry. The circular shape is ideal for applications where the light path is not confined to a straight line, while the Thin Lens geometry ensures minimal optical aberrations. The filter's diameter is 50 mm, and it has a thickness of 1 mm, making it suitable for a wide range of optical systems.

The filter's front and back surfaces are coated with 'edm 12-004', a coating type not specified in the data. However, it can be inferred that this coating is designed to enhance the filter's performance, possibly by reducing surface reflections or increasing durability.