With their ability to minimize back-reflections and scattered light, absorptive neutral density (ND) filters are ideal for calibration. In contrast to the metallic type, absorption-type filters achieve their optical density by absorbing light within the substrate. For this reason, thickness is a key determinant of opacity. Because of their absorbing quality, these filters are suitable for low-power applications only.
Accuray's absorbing ND filters are unique in that they are AR coated to reduce surface reflections. Polished to TWF 1/4 wave or better, this enables them to be stacked without concern about losses and artifacts due to multiple reflections. Absorbing ND filters are perfect for imaging applications.
Absorptive Filter Benefits
- Ability to minimize back reflections and scattered light
- Suitable for low power applications
Absorptive Filter Common Applications
- Photomicrography
- Machine vision
- Calibration
- Photography
- Scientific Measurements and research
