NE550B-A Dia. 0.5 in AR-Coated Neutral Density Filter; 350-700nm; OD 5.0 AR 350-700nm

The NE550B-A is a Neutral Density Filter, part of the extensive catalog of optical elements offered by Thorlabs. This circular filter, with a diameter of 12.7 mm and a thickness of 3.6 mm, is designed for use in optical systems that require neutral density filtration.

The filter is made from UVFS material, identified by the Mal-1965 material ID. It is designed to operate at a wavelength of 633 nm, making it suitable for a wide range of applications. The NE550B-A features anti-reflection coatings on both the front and back surfaces, specifically designed for the 350-700 nm range. This coating helps to minimize surface reflections, thereby improving transmission and reducing the risk of unwanted back reflections.

The filter's shape is that of a thin lens, which is beneficial in systems where space is at a premium. The coating on the filter is identified as 'tho ne50b-a', indicating a specific coating type used by Thorlabs.

According to the provided item data, the NE550B-A is currently in stock and available for immediate purchase. Further information, including pricing and detailed specifications, can be found on the Thorlabs website using the provided catalog number.