NE230B 2 in x 2 in Absorptive ND Filter; Optical Density 3.0

The NE230B is a Neutral Density (ND) Filter, measuring 2 in x 2 in, manufactured by Thorlabs. This filter is designed to reduce the intensity of incident light without altering its color composition, making it an essential tool for various optical applications.

The filter boasts an Optical Density (OD) of 3.0, which signifies a significant reduction in light intensity. Specifically, it allows only 0.1% of the incident light to pass through, equivalent to a reduction factor of 1000x. This high OD makes the NE230B suitable for high-intensity light sources or scenarios requiring extreme light attenuation.

The NE230B is crafted from N-BK7 Schott, a high-quality optical glass renowned for its excellent transmittance and low auto-fluorescence. The filter features a Thin Lens shape, with a thickness of 2.1 mm, ensuring minimal optical aberrations and distortions.

Both the front and back surfaces of the NE230B are coated with THo NE30A, a broadband anti-reflection coating. This coating enhances the filter's performance by reducing surface reflections, thereby increasing transmission and minimizing ghosting and flare effects.

The NE230B is available directly from Thorlabs, and the provided item data indicates that it is currently in stock. For more information, including technical specifications and purchasing details, please refer to the vendor's website using the provided weblink.