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Today's Most Versatile Light Measurement Solution
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Full Automation
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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. After setting up the measurement from menus on the 4 x 20 back lit LCD display,
making a measurement is as easy as pushing a button. The corrected measurement value
(e.g. luminance) is automatically displayed following the measurement. There is
no need to apply correction factors for optical accessories, the PR-880 does it
all for you. This helps remove any possible "cockpit" errors that could yield false
results.
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Pritchard Optics
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The PR-880, like all of Photo Research's photometers and spectroradiometers, utilizes
Pritchard measuring and viewing optics. Pritchard optics assures accurate, non-ambiguous
target alignment every time, regardless of the sample size.
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Remote Mode Software
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This powerful tool allows you to control the PR-880 measurement and data functions
from virtually any computer using simple ASCII (text) commands reports over the
built-in RS-232 interface. Combined with the full-automation capabilities of the
PR-880, Remote Mode software makes an easy task of creating an Automated Test Environment
(ATE) for hands off testing - an ever increasing need to help reduce the time to
verify that a product meets stringent international specifications.
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Sensitivity / Versatility
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Like it's predecessor, the PR-1980A, the PR-880 is the most sensitive filter photometer
in it's class. Combined with standard multiple apertures and a wide range of optical
accessories, virtually any measurement requirement can be met. The sensitivity range
of the PR-880 is extended by using four decades of Neutral Density (ND) filters
- ND-1, ND-2, ND-3, ND-4 located in a second, fully automated filter turret.
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Color it Better
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Photo Research is among the small minority of filter colorimeter manufacturers that
provides 4-filter colorimetry. The majority of filter colorimeters utilize three
filters - CIE X (Red), Y (Green or Photopic) and Z (Blue). The CIE X function has
two peaks, a minor peak at 442 nm (blue region) and a major peak at 599 nm. 3-filter
colorimeters ignore the part of the CIE X function that peaks at 442 nm. This can
yield significant errors especially for blue rich sources.
When ordered with the matched CIE Tristimulus filter option (Xb, Xr, and Z filters
in addition to the standard Photopic filter), the PR-880 can be commanded to speed
up color measurements by making these measurements using two or three filters instead
of all four filters - yielding time reductions of up to 60% (for two filter measurements).
For accuracy, correction factors are used that are established based on a full,
4-filter measurement.
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Measurement Capabilities
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Luminance
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Illuminance (optional)
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Colorimetry
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Correlated Color Temperature
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L*u*v*
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ΔE*
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Source Refresh 40-250 Hz
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* NEW * The patented
LR-127 LED Analyzer is an optical accessory designed to test discrete
LEDs to CIE 127 Technical Report - Measurement of LEDs.
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PR-880 Brochure