Most modern spectroradiometers are designed to measure the absolute spectral quantity, in terms of power, of the light under test by breaking up the broad band incoming optical signal into it's component parts by means of a diffraction grating - much like a prism. The diffracted light is then imaged onto a multi-element detector. Each detector element in turn samples it's own part of the diffracted spectrum. In addition to the measured spectral data, luminance, CIE chromaticity values, reflectance and transmittance are readily obtained from the spectral information.
Photo Research spectroradiometers are designed to measure radiance (watts/steradian/square meter) utilizing the patented Pritchard optics to collect the incoming optical radiation. Their ease-of-use, accuracy and reliability has made this product family the most widely used. Our spectroradiometers are tailored for display measurement, but can be outfitted to address virtually any light measurement application.
The PR-680 SpectraDuo marks the beginning of a new era in light measurement. This unique patent pending, battery powered portable instrument is the first and only combined fast-scanning 256 detector element spectroradiometer and PMT based photometer on the market. The PR-680 has three available operating modes
The PR-680 is supplied with 4 automated measuring apertures (1°, ½°, ¼° and 1/8°) and automated measure shutter. Other hardware features include AutoSync ® for automatically synchronizing to the source refresh rate insuring the utmost accuracy, a Secure Digital (SD) port for measurement storage, an external trigger port allowing remote measurement activation from either a push button or perpherial device, and a long lasting rechargeable Lithium-ion (Li) battery.