Gigahertz-Optik, Inc. - Newburyport, MA
Manufacturer, Custom Manufacturer
Manufacturer of standard & custom spectroradiometers. Other products include hand-held light & color meters, portable optometers, 4-channel optometers, spectrophotometers & spectrolightmeters.

International Light Technologies, Inc - Peabody, MA
Manufacturer, Service Company
Light Measurement Instruments: Ultraviolet-Visible-Infrared Radiometers, Photometers & Spectroradiometers

SPECTRAL EVOLUTION - Lawrence, MA
Manufacturer
Manufacturer of spectrodiometers. Applications include solar radiance and irradiance measurements, solar simulator test and classification, LED, laser, light source metrology, and radiometric calibration transfer. Features include autoexposure, autoscaling, and auto dark shutters, NIST traceable calibration for irradiance or spectral radiance, measurements and calibration transfer, and fiber optic or optional integrating sphere input.