AND-40C-20 40 mm Dia. Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

OptoSigma's AND-40C-20 is a high-quality Neutral Density Filter, designed for use in the visible light spectrum, specifically between 400-700nm. This unmounted filter, with a diameter of 40mm and a thickness of 2mm, is a circular component made of optical glass, featuring a thin lens shape.

The filter's primary function is to reduce the intensity of light entering an optical system, without altering the color composition. This is achieved through the use of absorptive coatings on both the front and back surfaces, identified as 'opt and-20'. These coatings ensure a consistent and even attenuation of light across the visible spectrum.

The filter is identified in the OptoSigma catalog with the number AND-40C-20, and it is currently in stock. The product's webpage provides further details and specifications, and it is accessible through the provided weblink. This filter is a reliable and essential component for various optical applications, offering a robust solution for light intensity control.