PhotoResearch PR-704 SpectraScan Spectroradiometer
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PhotoResearch PR-704 Spectroradiometer
The PR-704 Fast Spectral Scanning System is a self-scanning linear photodiode array spectroradiometer designed for rapid spectral analysis, luminance or photometric brightness, and color measurement.
The system is controlled by an IBM PC or compatible AT-bus personal computer.
The PR-704 is a fast scanning spectroradiometer that acquires the spectrum of optical radiation from 380nm to 780nm simultaneously, not serially. This permits accurate analysis of color and intensity of both steady-state (power) and pulsed (energy) light sources in as little as 13 milliseconds.
Each measurement cycle consists of two parts, measurement of the optical radiation (Light) and a measurement of equal length where no radiation is permitted to strike the detector (Dark). The Dark measurement data is subtracted from the Light measurement data to yield relative point-to-point data. The relative data is assigned to a wavelength band, corrected for intensity and made available to other software functions (calculations, display, print store/recall, etc.).
Optical Head Interface Board
The Optical Head Interface Board is a full-length AT-bus card installed in the personal computer. The card provides the interface between the Optical Head and the computer and software controlling the Optical Head.
Personal Computer
An IBM or compatible (AT-bus) personal computer controls the system. A single full-length (13-1/2-inch) slot for the Optical Head Interface Board is required. The PC Is used to control the measurement, calculate measured results, and store and recall data. The data can be displayed on a CGA, EGA or VGA monitor.
SpectraView Software
Provides full-featured spectroradiometric measurement and calculation capabilities.
Specifications:
Threshold Luminance / Maximum Luminance
The PR-704 Fast Spectral Scanning System is a self-scanning linear photodiode array spectroradiometer designed for rapid spectral analysis, luminance or photometric brightness, and color measurement.
The system is controlled by an IBM PC or compatible AT-bus personal computer.
The PR-704 is a fast scanning spectroradiometer that acquires the spectrum of optical radiation from 380nm to 780nm simultaneously, not serially. This permits accurate analysis of color and intensity of both steady-state (power) and pulsed (energy) light sources in as little as 13 milliseconds.
Each measurement cycle consists of two parts, measurement of the optical radiation (Light) and a measurement of equal length where no radiation is permitted to strike the detector (Dark). The Dark measurement data is subtracted from the Light measurement data to yield relative point-to-point data. The relative data is assigned to a wavelength band, corrected for intensity and made available to other software functions (calculations, display, print store/recall, etc.).
Optical Head Interface Board
The Optical Head Interface Board is a full-length AT-bus card installed in the personal computer. The card provides the interface between the Optical Head and the computer and software controlling the Optical Head.
Personal Computer
An IBM or compatible (AT-bus) personal computer controls the system. A single full-length (13-1/2-inch) slot for the Optical Head Interface Board is required. The PC Is used to control the measurement, calculate measured results, and store and recall data. The data can be displayed on a CGA, EGA or VGA monitor.
SpectraView Software
Provides full-featured spectroradiometric measurement and calculation capabilities.
Specifications:
| Optical Head Size and Weight | |
| Length | 11.8 in. (30 cm) |
| Height | 6.3 in. (16 cm) |
| Width | 6.0 in (15 cm) |
| Weight | 10 lbs (4.5 kg) with standard MS-55 Objective Lens |
| Operating Temperature Range | |
| Temperature Range | 41°F to 95°F (+5°C to +35°C) |
| Humidity | 85% relative humidity, non-condensing |
| Power Requirements | |
| Optical Head Interface | +5 Volts: 3.5 amperes +12 Volts: 0.7 amperes |
| Measurement | |
| Measurements | Spectroradiometry, photometry, and colorimetry of pulsed and steady-state sources |
| Spectral Transmittance and Reflectance (SpectraView Only) | |
| Wavelength Range | 380 to 780nm with MS-55 Standard Objective Lens 400 to 780nm with the FP-701A Fiber Optic Probe |
| Spectral Bandwith | 5nm (Average 1.7 nm per detector element) |
| Spectral Accuracy | +/- 4% of calculated luminance at 2856K |
| Color Accuracy for Illuminant A | - x: +/- 0.0015 - y: +/- 0.001 |
| Repeatability | The standard deviation of repeat measurements over a 15-minute period is not greater than 0.1% for measurements above the threshold level |
| Spectral Stray Light | Typically less than 0.25% of peak response when measuring broad band sources |
| Polarization Error | Less than 5% measuring 100% linearly polarized sources over the visible range |
| Visual Field of View | 8.5° with MS-55 Standard objective Lens |
| Integration Times | 0.026 to 60 seconds through user-selectable methods (Automatic Adaptive Sensitivity or by manual entry) |
| Digital Resolution | One part in 4,096 maximum (12-bit A-D Converter) |
| Computed Parameters | |
| CIE Chromaticity Coordinates (x, y, u', v') | |
| Correlated Color Temperature (Kelvins) | |
| Luminance (footLamberts and cd/m²) | |
| Corrected Spectral Radiance (380 to 780nm) | |
| Radiance (integrated from 380 to 780nm) | |
| Illuminance | |
| Spectral Irradiance | |
| Radiance | |
| Luminous Intensity | |
| Spectral Radiant Intensity | |
| Radiant Intensity | |
Threshold Luminance / Maximum Luminance
| Light Sources | 1/2° Round Aperture | 1/2° x 1.5° Aperture |
| Illuminant A | 2.0/6,800 fL 6.9/23,000cd/m² |
0.6/2000 fL 2.1/7,100 cd/m² |
| Illuminant B | 2.5/8,500 fL 8.5/29,000 cd/m² |
0.8/2,700 fL 2.7/9,200 cd/m² |
| Illuminant C | 2.3/7,800 fL 8.0/27,000 cd/m² |
0.7/2,400 fL 2.5/8,500 cd/m² |
| Illuminant E | 2.5/8,500 fL 8.5/29,000 cd/m² |
0.8/2,700 fL 2.7/9,200 cd/m² |
| D55 | 2.6/8,800 fL 8.5/30,000 cd/m² |
0.8/2,800 fL 2.8/9,400 cd/m² |
| D65 | 2.6/8,900 fL 9.0/31,000 cd/m² |
0.8/2,800 fL 2.8/9,600 cd/m² |
| D75 | 2.5/8,500 fL 8.6/29,000 cd/m² |
0.8/2,700 fL 2.7/9,100 cd/m² |
| P22 Blue Phosphor |
0.28/970 fL 0.97/3,300 cd/m² |
0.09/300 fL 0.30/1,000 cd/m² |
| P22 Green Phosphor |
1.8/6,100 fL 6.1/21,000 cd/m² |
0.56/1,900 fL 1.9/6,500 cd/m² |
| P22 Red Phosphor |
0.90/3,100 fL 3.1/10,500 cd/m² |
0.28/960 fL 0.97/3,300 cd/m² |