NE70A Dia. 25 mm Absorptive ND Filter; SM1-Threaded Mount; Optical Density 7.0

The NE70A is a Neutral Density Filter, specifically designed for applications requiring high light attenuation. Manufactured by Thorlabs, this filter boasts a catalog number of NE70A and is available for purchase directly from their website. The filter's current status is "Valid - in stock," ensuring quick delivery for your optical project needs.

This circular filter, with a diameter of 25 mm, is constructed from n-bk7 Schott, a high-quality optical glass. It has a thickness of 1.7 mm, providing robustness and stability during use. The filter features a Thin Lens shape, optimized for minimal distortion and optimal light transmission.

The NE70A filter's primary function is to reduce light intensity without altering the color composition of the light source. This is achieved through the application of a specialized coating on both the front and back surfaces, denoted as 'tho ne70a'. This coating provides an Optical Density of 7.0 at a wavelength of 633 nm.

The filter is mounted with an SM1-Threaded Mount, allowing for easy integration into existing optical systems. This mount ensures secure fastening while enabling quick removal for cleaning or replacement. The NE70A filter's combination of high-quality materials, precise manufacturing, and advanced coating technology make it an ideal choice for a wide range of optical applications.