Request InfoPerkinElmer InstrumentsThe model 198A dual-beam light chopper from PerkinElmer Instruments Signal Recovery is suitable for pump-probe and optical ratiometric experiments. It uses a quartz crystal oscillator as its primary frequency standard for accuracy and stability in beam modulation frequency. The device also can be used as a single beam chopper to generate modulation frequencies from 55 to 1500 Hz by selecting the appropriate aperture. The light chopper's electrical reference signal can drive the reference channel of a lock-in amplifier or other signal recovery instruments.See full productRelated content from Photonics MediaWEBINARSPhotonics.com 3/7/2019In Vivo Medical Laser Procedures: An OverviewThis webinar, presented by OFS, will provide an overview of current in vivo medical procedures performed using lasers and optical fibers. The presentation will begin with a brief history of...Photonics.com 3/27/2024Precision Planning: Simplified Laser Scanning with Predictive SoftwareConventional controllers for laser scan systems do not allow to predict the actual path of the laser beam on the work piece. A tedious process of testing different parameters and delay settings...Photonics.com 6/30/2021European Photonics Manufacturing Services Funded by ECThis event is supported by the European initiatives presented and is moderated by EPIC, the European Photonics Industry Consortium. The European Commission is helping companies access the...Photonics.com 7/20/2023Motorized and Calibrated Lenses for Machine Vision ApplicationsMany applications have benefited from motorized varifocal lenses that allow automatic or remote adjustment of focus distance and field of view. Applications may need to change the focal length or...