This is a 12.5 mm diameter Non-Reflective Neutral Density Filter, catalog number 63-377, offered by Edmund Optics. The filter is designed for use in the visible spectrum with a central wavelength of 588 nm. It features a non-reflective coating on both the front and back surfaces, identified as 'edm 63-377', which helps to minimize surface reflections and increase transmission.
The filter has a thickness of 1.5 mm and is shaped as a thin lens. It is made from UVFS Mal-1965, a material specifically designed for optical applications. The filter is currently in stock and available for purchase through the provided weblink.
This Neutral Density Filter is part of Edmund Optics' extensive catalog, offering a wide range of optical elements for various applications. The filter's primary function is to reduce the intensity of light without altering its color balance, making it suitable for applications where light intensity needs to be controlled, such as in photography, laser applications, and scientific research.