AND-40S-20 40 x 40 mm Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

The AND-40S-20 is a high-quality Neutral Density Filter, offered by the renowned optical components manufacturer, OptoSigma. This filter is designed to reduce the intensity of light, without altering its color composition, making it an essential tool for various optical applications.

The filter boasts a base shape of 40 x 40 mm, providing a generous surface area for beam manipulation. It is made from UVFS MAL-1965 optical glass, a material known for its excellent optical properties and durability. The filter's thickness is 2 mm, ensuring rigidity and resistance to mechanical stress.

The AND-40S-20 features absorptive coatings on both the front and back surfaces, identified as 'opt and-20'. These coatings are specifically designed to absorb a significant portion of the light spectrum, thereby reducing the overall intensity of the light beam. The coating is optimized for the visible light spectrum, specifically at a wavelength of 550 nm.

The filter's geometry is that of a Thin Lens, which is beneficial in applications where minimal optical path deviation is required. This feature also contributes to the filter's compactness and ease of integration into optical systems.

The catalog number for this filter is AND-40S-20. It is currently in stock and available for purchase through the OptoSigma website, with the weblink provided in the item data.