NENIR30B Dia. 25 mm Unmounted NIR Absorptive ND Filter; OD 3.0

The NENIR30B is a circular Neutral Density Filter with a 25 mm diameter and a thickness of 2 mm, sourced from the renowned optical components manufacturer, Thorlabs. This unmounted filter is designed for use in the near-infrared (NIR) region, specifically at a wavelength of 1550 nm, making it ideal for applications that require precise control over light intensity in the NIR spectrum.

The filter's primary function is to reduce the intensity of incident light without altering its color composition. This is achieved through the use of a specialized coating, denoted as 'tho nenir30b' on both the front and back surfaces. This coating is designed to provide an Optical Density (OD) of 3.0, which corresponds to a transmission of approximately 0.1%.

The NENIR30B filter features a 'Thin Lens' shape, which is engineered to minimize optical aberrations and ensure optimal performance. This filter is currently in stock and available for immediate purchase through the Thorlabs website, as indicated by its 'Valid - in stock' weblink status.

For more detailed information, including technical specifications and purchasing options, please refer to the provided weblink: https://www.thorlabs.com/thorproduct.cfm?partnumber=NENIR30B