Light Measurement
PR-680L
Overview
The PR-680L SpectraDuo is an ultra high sensitivity variant of the PR-680. It marks the beginning of a new era in light measurement. This unique patent pending, battery powered portable instrument is the first and only combined fast-scanning 256 detector element spectroradiometer and PMT based photometer on the market. The PR-680L has three available operating modes
- A fast scanning spectroradiometer (like the PR-670)
- A highly sensitive photometer (like the PR-810)
- Auto Select mode which automatically selects between detectors based on the available signal.
The PR-680L is supplied with 4 Automated Measuring Apertures (1°, 0.5°, 0.25° and 0.125°) and an Automated Measure Shutter. Other hardware features include AutoSync® for automatically synchronizing to the source refresh rate insuring the utmost accuracy, a Secure Digital (SD) port for measurement storage, an External Trigger port allowing remote measurement activation from either a push button or peripheral device, and a long lasting rechargeable Lithium-Ion (Li-Ion) battery.
The minimum sensitivity in the photometer mode is 0.00024 cd/m², 14 times more sensitive than even the PR-680.
Features
Easy to Use
The PR-680L is controlled via the on-board, 57 x 75 mm high resolution, full colour touch screen LCD display and 5-way navigation keypad for easy navigation. Following a measurement, the PR-680L displays data and colour spectral graphs on the system display. The PR-680L design provides stand alone operation - no PC required. The PR-680L can also be controlled via the world famous SpectraWin™ 2 software over the USB or Bluetooth interface.
Flexibility
The unique design of the PR-680L makes tasks such as spectrally based colourimetry and high speed, low level luminance - required for display metrology - possible with a single instrument by supplying a wide dynamic range - 0.00024 cd/m² (photometer and 1° aperture) to 17,000,000 cd/m² (spectral and 1/8° aperture) without using external neutral density filters. Since the Pritchard® viewing and measuring optics are shared by both detectors, tests can be performed without requiring realignment.
The optional analog output provides the capability of using the PR-680L as a high speed optical input (PMT signal) to a device such as an oscilloscope. The bandwidth is approximately 20 µsecs. Useful for tasks such as ON/OFF or gray level response time for LCD's. Includes a connector on the PR-680L and interconnecting cable.
We've further enhanced the flexibility of the spectral measurements by adding 2 sensitivity modes (Standard & Extended) and 4 measurement speeds : Normal, Fast, 2X Fast, 4X Fast.
For applications other than luminance the PR-680L can be supplied with optical accessories such as a cosine receptor for illuminance, LR-127 LED Analyzer for testing LED's to CIE 127, fibre probe for remote non-line-of-sight testing, and a series of magnification lenses for small spot size analysis. The PR-680L also provides the capability for interactive display white point calibration (RGB software).
Connectivity
It's easy for the PR-680L to talk to the outside world - it comes equipped with USB and (optional) Bluetooth® wireless interfaces. It is supplied with text based, Remote Mode syntax and a driver that emulates an RS-232 interface (COM: port) making it a simple task to generate custom programming to perform specific tasks or for inclusion in an ATE environment. If needed, an RS-232 interface can be added to complement the standard USB.
Manufactured by Photo Research
Specifications
Detectors | 256 linear array and PMT |
|---|---|
Inter-detector Alignment Error | 0% |
Spectroradiometer Wavelength Range | 380 to 780 nm |
Optics | Pritchard viewing and measuring system |
Digital Resolution | 16 bits |
Filters | Trimmed Photopic |
Spectral Resolution | 1.56 nm / pixel |
Spectral Bandwidth | 8 nm (5 nm optional) |
Spectral Accuracy | ± 1 nm |
Luminance Range | 0.00024 - 17,000,000 cd/m² |
Liminance Accuracy | ± 2% * |
Luminance Precision | ≤ 1% * |
Colour Accuracy | ±0.0015 * in CIE 1931 x,y |
Measurement Capabilities | Luminance, Illuminance, luminous intensity, chromaticity, correlated colour temperature |
AutoSync Range | 20 to 400 Hz |
Analog Output Response Time | 3 µsecs (optional) |
Measurement Time | 6 ms to 30 secs |
Battery | Rechargeable Lithium-ion. (≥ 12 hours continuous operation) |
Weight | 1.8 kg |
Operating Temperature | 1° to 35° C |
† Sensitivities are for 10:1 signal to RMS noise against an Illuminant A based NIST traceable luminance standard
* Luminance level of 1 cd/m² for the Array and 0.007 cd/m² for the PMT with the 1° aperture and an Illuminant A based NIST traceable luminance standard.
PR 680L Field Coverage (mm)
Accessory | Working Distance | 1° | 1/2° | 1/4° | 1/8° |
|---|---|---|---|---|---|
MS-75 | 355 mm | 5.25 | 2.63 | 1.32 | 0.658 |
SL-0.5X | 91.4 mm | 1.50 | 0.75 | 0.375 | 0.188 |
SL-1X | 46 mm | 0.89 | 0.445 | 0.226 | 0.111 |
MS-2.5X | 46 mm | 0.51 | 0.225 | 0.128 | 0.064 |
MS-5X | 28 mm | 0.289 | 0.145 | 0.072 | 0.036 |
MS-7.5 | 100 mm | 24.76 | 12.83 | 6.19 | 3.10 |
LA-680 | Contact | 13.2mm | N/A | N/A | N/A |
FP-680 | Contact | 3.17m | N/A | N/A | N/A |
PR-680L Minimum Photometric Sensitivity (cd/m²)
Accessory | Detector | 1° Aperture | 1/2° Aperture | 1/4° Aperture | 1/8° Aperture |
|---|---|---|---|---|---|
MS-75 | Spectral | 0.069 | 0.27 | 1.10 | 4.4 |
SL-0.5X | Spectral | 0.069 | 0.27 | 1.10 | 4.4 |
SL-1X | Spectral | 0.069 | 0.27 | 1.10 | 4.4 |
MS-2.5X | Spectral | 0.17 | 0.69 | 2.7 | 11 |
MS-5X | Spectral | 0.27 | 1.1 | 4.4 | 17.5 |
MS-7.5 | Spectral | 0.069 | 0.27 | 1.10 | 4.4 |
LA-680 | Spectral | 0.069 | 0.27 | 1.10 | 4.4 |
FP-680 | Spectral | 0.17 | N/A | N/A | N/A |
CR-680 | Spectral | 0.43 lux | N/A | N/A | N/A |
Schematics
