AND-25C-01 25 mm Dia. Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

The AND-25C-01 is a 25 mm diameter Optical Glass Neutral Density Filter, specifically designed for use in the visible light spectrum, between 400-700nm. This filter is unmounted, providing flexibility for integration into various optical systems.

The filter is manufactured by OptoSigma, a renowned vendor known for their high-quality optical elements. The product information indicates that the filter is currently in stock, and users can access the vendor's website for more details or to make a purchase.

The filter is of the Neutral Density type, which means it reduces the intensity of light without altering its color composition. This is achieved through the absorptive coating on the filter, denoted as 'opt and-01' on both the front and back surfaces. This coating ensures consistent attenuation across the visible spectrum.

The filter has a base shape of a circle, a common form factor for filters due to its ease of integration into various optical systems. The geometry of the filter includes a diameter of 25mm and a thickness of 2mm, making it a thin lens type. This thinness can be beneficial in reducing optical path length and minimizing potential aberrations.