Photometers are specifically designed to measure emitted, reflected or transmitted light in photometric terms of luminous flux, luminance, illuminance or luminous intensity. They utilise a single detector - usually a photomultiplier tube or silicon detector - and a filter that changes the system response to match the photopic function recommended by the Commission Internationale de L'Eclairage (International Commission on Illumination).
Measurements of displays typically require results in luminance (footlamberts or cd/m2). Photo Research photometers feature the patented Pritchard optical system to clearly and unambiguously define the area to be measured.
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PR-524  |
The PR-524 - LiteMate is a completely portable hand held, battery powered autoranging photometer used for human factors and room lighting applications. |
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PR-525  |
The PR-525 ColorMate System is a completely portable hand held, battery powered auto ranging photometer and colourimeter Capabilities include illuminance, CIE chromaticity and correlated colour temperature. |
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PR-880  |
The PR-880 is the only fully automated filter photometer available today. We've automated the measuring apertures (5 standard sizes),the filter turrets, the measuring (zero) shutter and viewing (eyepiece) shutter. All of these features are controlled by an on-board computer and are accessed via 8 push buttons on the integral control panel. |
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PR-1500  |
The PR-1500 is a sensitive, versatile photomultiplier-tube photometer that can measure luminance at any distance from 1 3/4 inches (44 mm) to infinity without the need for accessory lenses or changes in calibration |
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PR-1980A  |
The PR-1980A Pritchard Tele/Micro Photometer, is known for its superior performance, high sensitivity and maximum versatility in the lab or in the field. |
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PR-1530AR  |
The PR-1530AR NviSpot Night Vision Radiometer/Photometer/Colorimeter is a multi-purpose instrument designed to measure military displays for NVIS luminance and radiance. It features an ultra-sensitive photomultiplier-tube that provides near real-time results. |
