beam attenuator

beam attenuator

[′bēm ə′ten·yə‚wād·ər]
(spectroscopy)
An attachment to the spectrophotometer that reduces reference to beam energy to accommodate undersized chemical samples.
References in periodicals archive ?
For these same reasons, we also employ ROCs as beam attenuators in the measurement system (2) for characterizing the response linearity of detectors used with high-power lasers.
Custom Polarization Rotators, Beam Attenuators, and Variable Waveplates are each planned for release in the coming months.