This is a 14NDF-10-3 Unmounted Absorptive Neutral Density Filter, offered by Standa. The filter is designed to provide neutral density attenuation across the spectral range of 400-700nm, with an Optical Density (OD) of 1. The filter is unmounted, offering flexibility in integration with existing optical systems.
The filter is rectangular in shape, with dimensions of 50.8 x 50.8 mm, providing a substantial area for light absorption. The thickness of the filter is 3mm, contributing to its robustness and durability. The filter is coated with Sta 14ndf-1 on both the front and back surfaces, ensuring consistent attenuation across the spectral range.
The filter is designed based on the Thin Lens shape, which is a common choice for optical elements due to its minimal impact on the optical path. This shape also facilitates easy integration with other optical components.
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