Variable Attenuator

The FVA-UV Fiber Optic Variable Attenuator is an opto-mechanical device that controls light levels. It couples via optical fibers to spectrometers, light sources, and other sampling optics, and is used to attenuate light at all wavelengths uniformly.

The attenuator consists of an aluminum block with threaded ports that hold two fiber coupled collimating lenses. The device is placed inline between light sources, spectrometers, and other fiber optic products to permit variable attenuation of the light. A wheel, with an aperture that varies in width along the circumference, is fixtured between the collimating lenses. Rotating the wheel varies the fraction of light transmitted through the fixture. A thumbscrew is used to lock the wheel in place. It attenuates the light uniformly at all wavelengths from the UV-VIS through Shortwave NIR (200-1100 nm).

Additional information on this Variable Attenuator.

Ocean Optics Inc., 380 Main St., Dunedin, FL 34698. Phone: 727-733-2447; Fax: 727-733-3962.