49-066 25 mm Dia. UV-VIS Metallic Based Neutral Density Filter; OD 0.9 250-700nm

The 49-066 is a Neutral Density Filter with a 25 mm diameter, sourced from the reputable optical components vendor, Edmund Optics. This filter is designed for use in the UV-VIS spectrum, specifically catering to wavelengths between 250-700nm.

The filter boasts a Metallic Based construction, which is known for its durability and high-quality light control. The Neutral Density Filter type implies that this component is designed to reduce the intensity of incident light without altering its color composition. This is particularly useful in applications where controlling light intensity is crucial, such as in photography, astronomy, or laser applications.

The 49-066 filter has a defined Optical Density (OD) of 0.9. This value is a logarithmic measure of the filter's ability to reduce light intensity. Specifically, an OD of 0.9 corresponds to a 79% transmission of light, offering a significant yet controlled reduction in light intensity.

In terms of geometry, the filter has a diameter of 25mm and a thickness of 3mm, making it compatible with a wide range of optical systems. The filter's coating is consistent on both the front and back surfaces, with the designation 'edm 49-064'. This coating likely contributes to the filter's performance and durability.

The filter's 'Thin Lens' shape suggests that it is designed to minimize optical aberrations, ensuring clear and accurate light transmission. This feature, coupled with its UV-VIS spectrum compatibility, makes the 49-066 an ideal choice for a wide range of applications.