Photo Research: Comparison Between Filter Colorimeters and Spectroradiometers
A Comparison Between Filter Colorimeters and Spectroradiometers
Insuring that self-emissive technologies, such as information display monitors, LED lighting, or digital projectors, meet or exceed performance specifications requires precise characterization through accurate measurements. While there are several measurement technologies available for device characterization, two of the most commonly-used instrument types are filter colorimeters and spectroradiometers.
The primary benefit of a filter colorimeter is speed when measuring luminescence.
Keep in mind that inaccuracies due to filter mismatch between the responsivity of the instrument to the target response function is a significant drawback to this technology. This is especially true for devices that differ spectrally from the standard used for calibration.
In addition to measuring luminescence, spectroradiometers also measure dominant wavelength. A spectroradiometer provides a more precise and accurate measurement than a filter colorimeter, because it does not rely on absorptive filters for color accuracy. Additionally, a spectroradiometer provides information on the spectral power distribution of the source, which is impossible to obtain from a filter colorimeter.
When determining which chromaticity measurement solution will work for your application, keep in mind the accuracy of the solution. Although a lower cost technology like the colorimeter may seem sufficient, a more advanced solution, like the spectroradiometer, may ultimately deliver a better quality product that ensures accurate readings the first time.
For more information regarding colorimeter and spectroradiometer solutions offered by PHOTO RESEARCH, visit us at www.photoresearch.com, email us firstname.lastname@example.org or call us at 818-725-9750.