59-176 41 mm Dia. Mounted OD 0.9 Absorptive Neutral Density Filter; t=5 mm 400-700nm

The 59-176 is a Neutral Density Filter, specifically designed for applications that require a precise reduction of light intensity without altering the color balance. This filter, offered by Edmund Optics, is mounted with a diameter of 41 mm and a thickness of 5 mm, making it suitable for various optical systems.

The filter's primary function is to absorb a portion of the light spectrum, thereby reducing the overall intensity. The absorptive property of this filter is consistent across the visible light spectrum, from 400 to 700 nm, ensuring accurate color reproduction. The 0.9 density rating indicates that it reduces the light intensity to approximately 12.5% (1/8) of the unfiltered intensity.

The filter is coated on both the front and back surfaces with EDM 59-172, a coating that enhances its performance and durability. This coating helps to minimize surface reflections, improving transmission and reducing the likelihood of unwanted glare or ghosting.

The filter's thin lens shape allows for easy integration into optical systems, while its circular design provides versatility in application. The catalog number 59-176 and the vendor information point to Edmund Optics, a reputable supplier of optical components, ensuring quality and reliability.