NENIR04A Dia:25 mm NIR Absorptive ND Filter; SM1-Threaded Mount; OD: 0.4

The NENIR04A is a Neutral Density (ND) Filter, specifically designed for use in the Near-Infrared (NIR) region of the spectrum, with a center wavelength of 1550 nm. This filter is manufactured by Thorlabs, a leading vendor in the field of optical components. The NENIR04A is a circular filter, with a diameter of 25 mm and a thickness of 0.6 mm, making it suitable for a wide range of optical applications.

The filter features a unique coating on both the front and back surfaces, denoted as 'tho nenir04anirabsnd'. This coating is designed to absorb NIR light, thereby reducing the intensity of the incident light without altering its color balance. This makes the NENIR04A an ideal choice for applications where control over light intensity is crucial, such as in laser applications, biomedical imaging, and optical metrology.

The NENIR04A is mounted in an SM1-threaded mount, providing a secure and stable platform for the filter. The SM1 thread is a standard thread size in the optical industry, allowing for easy integration with other SM1-threaded components. The mount also features an Outside Diameter (OD) of 0.4 mm, ensuring a snug fit in most optical systems.