NE550B Dia. 0.5 in Absorptive ND Filter; Optical Density 5.0

The NE550B is a Neutral Density (ND) Filter, measuring 0.5 inches in diameter, manufactured by Thorlabs. This filter is designed to reduce the intensity of incident light without altering its color composition, making it an essential tool in various optical applications.

The filter is made from n-BK7 Schott, a high-quality optical glass, and features a circular shape. It has a diameter of 12.7 millimeters and a thickness of 3.6 millimeters, ensuring durability and precision. The NE550B is coated with THo NE50A on both the front and back, providing excellent absorptive properties.

This specific filter has an optical density of 5.0 at a wavelength of 633 nanometers. Optical density is a logarithmic measure of the reduction in transmittance of light through a medium, such as a filter. In this case, an optical density of 5.0 means that the filter reduces the intensity of light by a factor of 100,000 at the specified wavelength.

The NE550B filter has a 'Thin Lens' shape, which refers to its optical profile. This shape is designed to minimize optical aberrations and distortions, ensuring optimal performance in various applications.

The filter is currently in stock and available for purchase through the vendor's website, with the provided weblink offering direct access to the product page.