ND13A Dia. 25 mm ND Reflective Filter; SM1-Threaded Mount; Optical Density 1.3

The ND13A is a Neutral Density Filter, specifically designed for use in optical systems. Manufactured by Thorlabs, this filter boasts a catalog number of ND13A and is available for purchase through their official website. The filter's current status is 'In Stock', ensuring quick delivery upon order placement.

This circular filter has a diameter of 25 mm and a thickness of 1 mm, making it a compact yet effective component in any optical setup. The filter is made from n-BK7 Schott, a high-quality optical glass known for its excellent transmittance and low auto-fluorescence.

The ND13A filter features a front and back coating of tho nd13, a proprietary coating developed by Thorlabs. This coating enhances the filter's performance by reducing reflections and increasing transmission, thereby improving the overall efficiency of the optical system.

The filter is mounted with an SM1-Threaded Mount, providing a secure and stable connection to other optical components. The mount's design allows for easy installation and removal, making it a convenient choice for users who frequently adjust their optical setups.

With an optical density of 1.3, the ND13A filter reduces the intensity of light passing through it without altering the light's color composition. This makes it an ideal choice for applications where light intensity needs to be controlled, such as in laser systems or high-powered lighting setups.