NENIR501B Dia. 0.5 in NIR Absorptive ND Filter; OD 0.1

The NENIR501B is a Neutral Density (ND) Filter, specifically designed for use in the Near-Infrared (NIR) spectrum with a wavelength of 1550 nm. This filter is manufactured by Thorlabs, a leading vendor in the optical components industry, and is available for purchase through their official website. The catalog number for this product is NENIR501B.

This filter is circular in shape, with a diameter of 12.7 mm and a thickness of 0.5 mm, making it suitable for use in a variety of optical systems. The filter is made from UVFS material, identified as MAL-1965 in Thorlabs' catalog. The front and back of the filter are coated with tho nenir01b, a specialized coating that enhances the filter's performance in the NIR spectrum.

The NENIR501B filter has an Optical Density (OD) of 0.1. This means that it reduces the intensity of the incident light by a factor of 1.26, providing a subtle yet noticeable reduction in light intensity. The filter's shape is described as Thin Lens, indicating that it may have some lens-like properties, although this is not explicitly stated in the provided data.