NENIR40B-C Dia. 25 mm Unmounted AR-Coated Absorptive Neutral Density Filter; 1050 - 1700nm; OD 4.0 AR 1050-1700nm

The NENIR40B-C is a circular, unmounted neutral density filter with a diameter of 25 mm and a thickness of 2.63 mm. This filter is designed for use in the infrared spectrum, specifically between 1050 and 1700 nanometers. It boasts an optical density (OD) of 4.0, which means it reduces the intensity of incident light by a factor of 10,000.

This filter features AR coatings on both the front and back surfaces, specifically designed for the 1050-1700nm range. These anti-reflective coatings help to minimize surface reflections, thereby improving transmission and reducing the likelihood of unwanted optical artifacts.

The filter is made from UVFS material, identified by the Mal-1965 material ID. It is shaped as a thin lens, which can be beneficial in certain optical system designs. The filter is sourced from Thorlabs, a reputable vendor known for their high-quality optical components.

According to the vendor's website, the filter is currently in stock, indicating its availability for immediate purchase and use. The product's webpage can be accessed directly through the provided link, offering further details and specifications for those interested in this optical component.