The PR -81 OL Ultra Low-Level Pritchard" Photometer
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PHOTO RESEARCH®, Inc. The PR®-810L Ultra Low-Level hotometer Meeting the Demand Information display performance is continuing to improve at an almost exponential rate. Of these improvements, one of the most important is luminance contrast. To achieve improved contrast ratios, display manufacturers are striving to make black blacker. In parallel with improvements in performance cornes an increased level of difficulty in measuring the ever decreasing luminance levels. The PR-810L is designed to not only meet but exceed these demands. Portability / Ease of use The PR-810L is unlike any of our previous photomultiplier tube (PMT) based pho-tometers - it's battery powered! The Lithium-ion battery provides more than 12 hours of continuous operation providing the ultimate in portability. It also features a full color touch screen display, and 75 mm objective focusable from 14" (355 mm) to infinity (see lens spcifications on following page). Sensitivity Measurement Using the largest of the 4 fully automated apertures, the PR-810L can 04-18-2008 04:49:32 PM measure 1E-6 (0.000001) footlamberts. A fully automated Neutral Density (ND) filter turret provides 3 decades of filtration (10X, 100X and 1000X attenuation) resulting in a 900,000,000:1 dynamic range in any Luminance aperture - wide enough for any contrast measurement task. The total 0.000003 instrument dynamic range is 518 Billion:1 ! cd/m' Connectivit For help in communicating with the outside world, the PR-810L is sup-plied with a USB interface and driver. The driver establishes a virtual COM port making control of the PR-810L as easy as communicating Back Abort over RS232. If a traditional RS232 interface is a must, it can be sup- Measurement Result Screen plied to complement the USB I/F. Want to go wireless? A Class 1 Bluetooth interface can be added for control of the PR-810L up to 100 meters away. For control of the PR-810L, an on-board protocol - Remote Mode Software - allows you to make meas-urements and get the data you need by sending and receiving simple ASCII text commands making integration into an ATE or other environment a snap. Applications Features Benefits Full Color Touch Screen Display Easy-to-use menu based software Wide Dynamic Range Address almost any display measurement requirement USB Interface Connects to virtually any PC Bluetooth ready (optional) Wireless, remote data transfer Long lasting rechargeable Li-Ion battery Excellent for field use SD Card Storage Save thousands of measurements Display luminance Medical / dental testing Display Contrast Reflectance / transmittance Automotive and Aerospace Display Testing Human factors

PR-810L Spcifications 1-810L Measurement Spot Size Detector Photomultiplier Tube (PMT) Optics Pritchard optical system. Digital Resolution 16 bits Standard Apertures 3°, 1°, 1/4°, 1/8° Optional Apertures 2°, 1°, 0.2°, 0.1° 1°, 1/2°, 1/4°, 1/8° 1°, 1/2°, 1° x 0.33°, 1/4° Luminance Range 0.000001 to 518,400 fl_t Luminance accuracy (Against NIST luminance standard) * ± 2% Luminance repeatability * < 1% Display 3.5" Color Touch Screen Display Measurement Time 200 ms to 10 secs. Battery Rechargeable Lithium-ion. (> 12 hours continuous operation) Weight 3.75 lbs (1.7 kg) Operating Temperature 34°...