Spectroradiometer Systems

As the inventors of the first high-performance, computer-controlled spectroradiometers for LED testing, Gamma Scientific has continued to set the standard in spectroradiometer accuracy and reliability. Gamma Scientific spectroradiometers are trusted by the world’s leading organizations to provide accurate measurements.

Gamma Scientific spectroradiometers feature a proprietary optical design and back thinned CCD technology that provides exceptional low-light measurements, superior blue light sensitivity and highly accurate measurements of wavelength, color and power.

Original system calibration is performed in Gamma Scientific’s accredited laboratory using NIST-traceable standards. Gamma Scientific spectroradiometers can be self-calibrated and do not have to be returned to the factory for calibration.

Gamma Scientific Spectroradiometers

The Gamma Scientific spectroradiometer platform is a durable opto-electrical design proven in hundreds of facilities worldwide. Experience the Gamma Scientific advantage offering advanced, high-speed spectroradiometers that combine the leading-edge sensitivity of a backside-thinned CCD detector with Gamma Scientific’s industry-renowned OMA optical multi-channel analyzer opto-electrical platform.

Gamma Scientific spectroradiometers feature millisecond measurement speed, exceptional low-light measurement capability and superior blue-light region sensitivity at least two times greater than conventional front-illuminated CCD-based systems. Gamma Scientific spectroradiometers are ideally suited for testing LED color and luminance, flat panel displays, retroreflected color, reflectance, transmittance and light sources.

Interfacing the spectroradiometer via USB 2.0 to Gamma Scientific’s powerful Windows-based Light Touch spectral data acquisition and analysis software package rounds out a comprehensive solution.

The Gamma Scientific Spectroradiometer Advantage

  • High-resolution 0.5nm per Pixel
  • Multiple Models Covering UV, Visible and near-IR Wavelength Ranges
  • High-quality TE cooled back-thinned CCD detector for high sensitivity and stability
  • Exceptional Accuracy via High-Resolution Bandwidth Coverage
  • Near Real Time (millisecond) Measurement Speed
  • Production-line and R&D Software Solutions
  • Powerful and Flexible Analysis Software
  • Robust and Reliable Design
  • NIST-Traceable Field-Calibration
  • High Sensitivity and Spectral Resolution
  • Self-calibration (system never has to be returned for calibration)
  • Superior Wavelength and Color Accuracy
  • Large Dynamic Range and Low Stray Light
  • Thermal and Mechanical Stability
  • Electronic Shutter for fast scans during LED production testing
  • Mechanical Shutter to meet the high accuracy demands of R&D

Gamma Scientific Spectroradiometer Applications

Gamma Scientific Spectroradiometer Models

GS-1290 Spectroradiometers

  • Recommended geometry from CIE Pub. No. 127; Condition A & B
  • Exceptional accuracy via high-resolution bandwidth coverage
  • Superior wavelength and color accuracy via low thermal expansion coefficient materials
  • Near-real-time measurement
  • High resolution: 0.4 nm/pixel
  • Spectral ranges: 200-800 nm, 200-1100 nm, 360-940 nm
  • USB interface
  • Windows-based control/analysis software
  • NIST-traceable accuracy
  • Self-calibrate (System never has to be returned for calibration)

GS-1220 Spectroradiometers

  • High resolution, temperature cooled-back illuminated 2048 pixel CCD Sensor
  • Exceptional accuracy via high-resolution bandwidth coverage
  • Superior wavelength and color accuracy
  • Near-real-time measurement
  • Spectral ranges: 250-900 nm, 360-900 nm, 360-1100 nm
  • NIST-traceable calibration
  • Integrated neutral density filter wheel
  • Hardware input/output trigger
  • Windows based control/analysis software with Excel integration
  • Wide variety of test sockets for many LED types

GS-1290 Spectroradiometer Specifications

Detector and Wavelength Specifications
Spectrometer GS-1290-1 GS-1290-2 GS-1290-3
Nominal Spectral Range 200-800 nm 200-1100 nm 360-940 nm
Datapoint Interval 0.6 nm 0.9 nm 0.6 nm
Spectral Bandwidth
(Built-in User Selectable Half-Power Bandwidth
(HPBW). Factory Setting in Bold)
10 nm
5.0 nm
2.5 nm
1.4 nm
1.0 nm
20 nm
10 nm
5.0 nm
2.7 nm
1.8 nm
10 nm
5.0 nm
2.5 nm
1.4 nm
1.0 nm
Wavelength Repeatability 0.02 nm 0.03 nm 0.02 nm
Wavelength Accuracy ± 0.2 nm ± 0.2 nm ± 0.2 nm
Accuracy
Luminous Intensity ± 1% ± 1% ± 1%
Luminous Flux ± 1% ± 1% ± 1%
Chromaticity (CIE 1931 xy)² x,y = ± 0.0015 x,y = ± 0.002 x,y = ± 0.0015
Dominant Wavelength ± 0.5 nm ± 0.5 nm ± 0.5 nm
Sensitivity
Luminous Intensity (10:1 signal-to-noise) 0.002 mcd to 15 kcd 0.002 mcd to 15 kcd 0.002 mcd to 15 kcd
Luminous Flux (12″ sphere; 10:1 signal-to-noise) 0.1 mlm – 250 klm 0.1 mlm – 250 klm 0.1 mlm – 250 klm
Measuring Time (range) 5 msec to 300 sec 5 msec to 300 sec 5 msec to 300 sec
Measuring Time at 1 mcd (10:1 signal-to-noise) 40 msec 40 msec 40 msec
Specifications for All Spectroradiometers
Stray Light Less than 1 x 10-4
Spectral Sensor Temperature-Stabilized Back-Thinned 1024×128 element CCD Array
Electrical Resolution 16 bit
Dynamic Range (single scan) 64,000:1
Computer Interface USB 2.0
Control Software Lightouch LED software for Windows
Dimensions 5.25″ H x 17.25″ W x 16.25″ L
13.34 cm H x 43.8 cm W x 41.28 cm L
Weight 30 lbs (13.6 kg)

GS-1220 Spectroradiometer Specifications

Detector and Wavelength Specifications
Spectrometer GS-1220-0 GS-1220-1 GS-1220-2
Nominal Spectral Range 250-900 nm
UV-VIS
360-900 nm
VIS
360-1100 nm
VIS-NIR
Datapoint Interval 0.32 nm 0.32 nm 0.35 nm
Spectral Bandwidth
(Built-in User Selectable Half-Power Bandwidth
(HPBW). Factory Setting in Bold)
10 nm
5.0 nm
2.5 nm
1.4 nm
1.0 nm
10 nm
5.0 nm
2.5 nm
1.4 nm
1.0 nm
10 nm
5.0 nm
2.5 nm
1.4 nm
1.0 nm
Wavelength Repeatability 0.02 nm 0.02 nm 0.02 nm
Wavelength Accuracy ± 0.1 nm ± 0.1 nm ± 0.1 nm
Accuracy
Luminous Intensity ± 1% ± 1% ± 1%
Luminous Flux ± 1% ± 1% ± 1%
Chromaticity (CIE 1931 xy)² x,y = ± 0.0015 x,y = ± 0.0015 x,y = ± 0.0015
Dominant Wavelength ± 0.5 nm ± 0.5 nm ± 0.5 nm
Sensitivity
Luminous Intensity (10:1 signal-to-noise) 0.02 mcd to 15 kcd 0.02 mcd to 15 kcd 0.02 mcd to 15 kcd
Luminous Flux (12″ sphere; 10:1 signal-to-noise) 1 mlm – 240 klm 1 mlm – 240 klm 1 mlm – 240 klm
Illuminance Sensitivity (10:1 signal-to-noise) 0.02 mlux – 15,000 lux 0.02 mlux – 15,000 lux 0.02 mlux – 15,000 lux
Measuring Time (range) 2 μsec to 2.67 sec 2 μsec to 2.67 sec 2 μsec to 2.67 sec
Measuring Time at 1 mcd (10:1 signal-to-noise) 40 msec 40 msec 40 msec
Specifications for All 1220 Spectroradiometers
Stray Light Less than 1 x 10-4 (at 8 times the HPBW from HeNe Laser Line)
Spectral Sensor High Resolution 2048 pixel CCD Sensor
Temperature Stabilized Sensor -5° C below ambient
Electrical Resolution 16 bit
Dynamic Range (single scan) 6,670:1
Computer Interface USB 2.0
Control Software Lightouch LED software for Windows
Dimensions 5.25″ H x 12.00″ W x 10.20″ L
13.34 cm H x 30.48 cm W x 25.91 cm L
Weight 20 lbs (9.1 kg)