ND05A Dia. 25 mm ND Reflective Filter; SM1-Threaded Mount; Optical Density 0.5

The ND05A is a Neutral Density (ND) Reflective Filter, manufactured by Thorlabs, with a diameter of 25 mm and a thickness of 1 mm. This filter is designed for use with optical systems that require neutral density filters with specific optical density values. The ND05A filter has an optical density of 0.5, which means it reduces the light intensity by a factor of 10^0.5, or approximately 31.62%.

The filter is made of N-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties, including high transmittance, low auto-fluorescence, and excellent homogeneity. This material makes the ND05A suitable for a wide range of applications, from beam attenuation to laser safety.

The ND05A filter features a Thin Lens shape and is coated with Thorlabs' proprietary THo ND05 coating on both the front and back surfaces. This coating enhances the filter's performance by reducing surface reflections and improving transmission. The SM1-threaded mount ensures easy integration into existing optical systems.

The filter's specifications, including its catalog number, vendor, and current availability status, can be found on Thorlabs' official website. The provided weblink is valid and leads directly to the product page, ensuring users can access the most up-to-date and accurate information.