NENIR40A-C Dia. 25 mm AR-Coated Absorptive Neutral Density Filter; SM1-Threaded Mount; 1050 - 1700nm; OD 4.0 AR 1050-1700nm

The NENIR40A-C is a Neutral Density Filter, designed and manufactured by Thorlabs, a leading global supplier of photonics equipment. This particular model boasts a circular shape with a diameter of 25 mm and a thickness of 2.63 mm, making it suitable for a wide range of optical applications.

The filter is constructed with a unique material identified as "uvfs mal- 1965", which is specifically designed to manage wavelengths around 1550 nm. This makes it an ideal choice for applications that require precise control over light in the near-infrared spectrum.

The NENIR40A-C features an AR coating on both the front and back surfaces. This Anti-Reflective coating, designated as "tho nenir40a-c", is designed to minimize surface reflections and optimize transmission in the 1050 - 1700 nm range. This coating not only enhances the filter's performance but also reduces the likelihood of unwanted reflections and scattering, which can lead to signal loss or noise in optical systems.

The filter is mounted with an SM1 thread, a common standard in the optical industry. This threaded mount ensures secure and easy installation into various optical systems. The filter's "Thin Lens" shape further adds to its versatility, allowing it to be used in a variety of setups and configurations.

According to the vendor's website, the NENIR40A-C is currently in stock, indicating its availability for immediate purchase and use. For more information, users are encouraged to visit the provided weblink, which leads directly to the product's page on Thorlabs' website.