NDIR03A Dia. 25 mm; SM1-Threaded Mount; IR Reflective Neutral Density Filter; OD 0.3

The NDIR03A is a Neutral Density Filter with a diameter of 25 mm, designed for use in the infrared spectrum. This filter is manufactured by Thorlabs, a leading vendor in the optical components industry, and is available for purchase through their website. The catalog number for this specific filter is NDIR03A.

The NDIR03A filter is constructed with a thin lens shape and features an SM1-threaded mount for easy integration into optical systems. The filter's primary function is to reduce the intensity of incident light without altering its color composition. This is particularly useful in applications where high light levels could potentially damage sensitive optical components or disrupt experimental conditions.

The filter's coating is another key feature. Both the front and back surfaces of the NDIR03A are coated with Thorlabs' proprietary IR Reflective coating, designated as 'tho ndir03a'. This coating is specifically designed for use in the infrared region of the spectrum, ensuring optimal performance in this wavelength range.

The NDIR03A filter has a thickness of 1 mm, contributing to its overall robustness and durability. The filter's geometry, including its diameter and thickness, is designed to provide a balance between compactness and ease of handling.