Photometer null for multiple wavelength optical simultaneous measurements

摘要

Simultaneous multiple photometer measurements are made by simultaneously passing light to be measured through multiple light paths to different locations of a circularly variable filter; passing the light through the circularly variable filter at said locations; collecting the light passed through the circularly variable filter at each location; transmitting the light passed through the circularly variable filter to separate detectors; and measuring the light transmitted along each light path by said detectors.