NE540B-B Dia. 0.5 in AR-Coated Neutral Density Filter; 650-1050nm; OD 4.0 AR 650-1050nm

The NE540B-B is a Neutral Density Filter, part of Thorlabs' extensive catalog of optical elements. This circular filter, with a diameter of 12.7 mm and a thickness of 2.8 mm, is designed for use in the 633 nm wavelength range.

The NE540B-B filter is coated with AR 650-1050nm on both the front and back surfaces, ensuring high transmission and minimal reflection across the specified wavelength range. This coating also helps to reduce surface scatter, thereby improving image quality.

The filter's Neutral Density (ND) characteristic, with an Optical Density (OD) of 4.0, provides a significant reduction in light intensity while maintaining a neutral color balance. This makes it ideal for use in high-intensity light applications where light level reduction is required without altering the color composition of the light.

The filter's thin lens shape allows for easy integration into optical systems, and its AR coating ensures minimal loss of light due to reflection. The NE540B-B is currently in stock and available for immediate purchase from Thorlabs' website.