NE506A Dia. 0.5 in Absorptive ND Filter; SM05-Threaded Mount; Optical Density 0.6

The NE506A is a Neutral Density (ND) Filter, specifically an absorptive type, manufactured by Thorlabs. This filter is designed for use with optical systems that require a reduction in light intensity without altering the color composition of the light source. The NE506A has a catalog number of NE506A and is available for purchase directly from Thorlabs' website, where it is currently listed as in stock.

The NE506A features a circular shape with a diameter of 12.7 millimeters and a thickness of 1.1 millimeters. It is constructed from N-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties. This filter is designed to be used with wavelengths of 633 nanometers.

The NE506A is coated with Thorlabs' proprietary THo NE06A coating on both the front and back surfaces. This coating is specifically designed to provide a high level of neutral density, reducing the light intensity by an optical density of 0.6. The THo NE06A coating also ensures high transmission and low reflection, making it ideal for use in a wide range of optical applications.

The NE506A features a thin lens shape and is mounted with an SM05 thread, making it compatible with a wide range of optical systems. This filter is an excellent choice for users who require a high-quality, reliable, and versatile ND filter for their optical experiments or applications.