How does the circular polarizing feature work?
3M™ computer filter models HF300 and HF350 are extremely effective light-trapping devices that reduce glare and increase contrast of monitors. These filters select and alter the properties of light to more effectively remove monitor glare. The ambient light that causes glare and reflections is trapped by the circular polarizer. The light that has passed through a circular polarizing filter and reflects off a surface, such as a monitor, cannot return through the filter, and is absorbed by the polarizing layers. The light from the monitor passes through the filter with far less reduction in strength. The circular polarizing filter allows the images from the monitor to pass through easily. 3M™ circular polarizing computer filters reduce up to 20 times more glare and improve contrast up to 14 times more than non-filtered computer monitors.* * Dependent upon monitor and lighting conditions.
