AND-25S-13 25 x 25 mm Optical Glass Unmounted Visible Absorptive Neutral Density Filter 400-700nm

The AND-25S-13 is a 25 x 25 mm Optical Glass Neutral Density Filter, specifically designed for use in the visible light spectrum, between 400-700nm. This filter is unmounted, offering users the flexibility to integrate it into their existing optical systems.

The filter is manufactured by OptoSigma, a leading vendor in the optical industry, known for its high-quality, precision-engineered optical components. The product information indicates that the filter is currently in stock, and users can access more details or make a purchase via the provided weblink.

The filter is of the Neutral Density type, which means it reduces the intensity of all wavelengths of light equally, providing a uniform attenuation. This is particularly useful in applications where it's necessary to maintain the color balance while reducing the light intensity.

The filter is rectangular in shape, with dimensions of 25 x 25 mm, and has a thickness of 2mm. This shape and size are common in various optical applications, making the AND-25S-13 a versatile choice for many setups.

The filter's coating is another crucial aspect. Both the front and back surfaces of the filter are coated with 'opt and-13', which is likely a specific coating type developed by OptoSigma for this product. This coating enhances the filter's performance and durability, ensuring optimal results in its intended use.

The geometry of the filter is described as 'Thin Lens', suggesting that the filter is designed to minimize optical aberrations and distortions, which is crucial in many applications.