This is the HO-NDR-12.5-0.1, a Neutral Density Filter with a 12.5 mm diameter, sourced from Holmarc Opto-Mechatronics. The filter is made of N-BK7, a high-quality glass material from Schott, which is known for its excellent optical properties.
The filter features a reflective coating, specifically the hol ndr od-0.1, on both the front and back surfaces. This coating provides an Optical Density (OD) of 0.1, which is equivalent to a transmission of approximately 90%. This makes it suitable for applications where a small amount of light reduction is required.
The filter has a geometric profile of a thin lens, with a thickness of 2 mm. This design helps to minimize optical aberrations and distortions, ensuring high-quality imaging and light transmission.
The filter is currently in stock and available for purchase through the Holmarc Opto-Mechatronics website. For more information, you can visit the provided weblink: https://www.holmarc.com/reflective_neutral_density_filters.php