NE206B 2 in x 2 in Absorptive ND Filter; Optical Density 0.6

The NE206B is a Neutral Density Filter, measuring 2 inches in width and height, 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's core is made of n-bk7 schott, a high-quality optical glass known for its excellent transmittance and low auto-fluorescence. The filter's geometry is defined by its width and height of 50.8 millimeters each, and a thickness of 1.1 millimeters, ensuring a compact and lightweight design.

The NE206B features a thin lens shape, which is beneficial in applications where maintaining a precise optical path is crucial. The front and back surfaces of the filter are coated with tho ne06a, a proprietary absorptive coating developed by Thorlabs, which provides an optical density of 0.6. This coating ensures consistent light reduction across the filter's entire surface.

The filter's coating and material are optimized for a central wavelength of 633 nanometers. This wavelength corresponds to the red line in a helium-neon laser, a common reference in optical systems. However, the filter maintains high performance across a broad spectral range, making it versatile for various applications.

The NE206B is currently in stock and available for immediate purchase through the vendor's website. The provided weblink offers direct access to the product page for convenient shopping.