Variable Attenuator

SLOC provide two kinds of variable attenuators for different application. The circular variable attenuator can make the optical density linearly varies around a 0°-270° circle for measuring laser energe farthest. As for the square one, the optical density linearly varies across the length for measuring laser energe.

Circular Variable Neutral Density Filter is designed to attenuate the wide spectrum of low energy laser light from UV to near IR wavelength. The optical density gradient varies from 0–1.0, 0-1.5, 0-2.0 and 0-3.0 around a by simply rotating the filter from 0 to 360°. The circular variable attenuator operates in visible and NIR light. A new and reliable film of NiCrFe has been designed to achieve broadband attenuation. The second surface of this filter is coated with a broadband visible antireflection coating to minimize the reflective loss from the second surface.

Application

• Electronic image
• Detector of photon
• Optical instrumentation