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

1. RadOMA Spectroradiometers

2. Since 1961 Gamma Scientific has produced LED, display and light
measurement test solutions for production and R&D environments.
Gamma Scientific instruments are trusted by leading global
organizations that require high-speed, precision measurements
and custom configurations for the most challenging environments.
Gamma Scientific also operates an ISO 17025 compliant, NVLAP
(NVLAP Lab Code 200823-0) accredited laboratory that performs
ENERGY STAR® lighting certification and LM-79 testing.
About Gamma Scientific

3. The Standard in LED Testing for
Over 40 Years
 Gamma Scientific instruments
have been used for LED testing
since 1973, when photometers
from Gamma Scientific were used
by Hewlett Packard to accurately
measure optical properties of Red
LEDs
 Gamma Scientific developed the
first high-performance, computer
controlled spectroradiometers for
LED testing
 The Gamma Scientific Laboratory
is accredited by NVLAP (NVLAP
Lab Code 200823-0) for Energy
Efficient Lighting Products
(including LM-79) in accordance
with ISO-IEC 17025

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

5. Radoma Spectroradiometers
Original spectroradiometer calibration is
performed in Gamma Scientific’s
NVLAP accredited laboratory using
NIST-traceable standards. RadOMA
spectroradiometers can be self-
calibrated and do not have to be
returned to the factory for calibration.
The RadOMA Series features
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.
RadOMA spectroradiometers are ideally
suited for testing LED color and
luminance, flat panel displays,
retroreflected color, reflectance,

6. The Radoma 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

7. The Radoma Spectroradiometer
Advantage
 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

8. Radoma Spectroradiometer
Specifications
Detector and Wavelength Specifications
Spectrometer GS-1290-1 GS-1290-2 GS-1290-3
Nominal Spectral Range 200-800 nm 300-1100 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 ± 0.1 nm ± 0.2 nm ± 0.1 nm

9. Radoma Spectroradiometer
Specifications
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

10. Radoma Spectroradiometer
Specifications
Specifications for All Spectroradiometers
Stray Light Less than 1 x 10 ⁻²
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)

11. SPECTRORADIOMETER APPLICATIONS

12. The RadOMA-LED spectroradiometer’s exceptional low-light measurement
capability and superior blue-light region sensitivity over conventional front -
illuminated CCD-based systems further enhances accuracy for determination
of LED’s half-power bandwidth, peak wavelength, color temperature,
luminance and proper binning.
The system is easily configurable to measure different aspects of LED
output. The standard system comes with optics for spectral radiant intensity
(and luminous intensity in candelas) following the CIE Publication Number
127 recommendations. It can also be coupled to an integrating sphere for
total flux measurements, both 2 pi and 4 pi steradians; or a computer -
controlled 2-axis goniometer for spatial intensity measurements .
LED Spectroradiometers

13. Isolated first surface measurement of anti-reflection coatings on substrates
down to 0.5 mm thick.
Our unique technology allows manufacturers to perform single sided
inspection on the first surface of any glass or polished, transmissive element
while excluding the second surface.
The systems capture complete spectral and colorimetric properties of AR
coatings with a scan time of less than 0.2 seconds.
Thin film test systems are ideal for manufacturers who need to obtain fast
and accurate measurements for flat panel display glass, anti -reflection
coating inspection, touchscreen display glass, optical filters and lens
coatings.
Thin Film Measurement Systems

14. For over 40 years Gamma Scientific has been a pioneer in night
vision testing.
The Gamma Scientific Model C-11 scanning grating
spectroradiometer systems were used to establish the light levels
specified in MIL-L-85762 that prevent cockpit lighting interference
with the pilot’s Night Vision Goggle enhanced aircraft exterior
vision.
RadOMA DMS 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.
Night Vision Compatibility Testing

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

16. Bi-Spectral Fluorescence
Spectroradiometers
The Gamma Scientific Bi-Spectral
Fluorescence Spectroradiometer takes
precise measurements throughout the
UV, visible and near IR spectrum to
quickly obtain detailed fluorescence
data for samples, including LED
phosphors.
The system is able to simultaneously
measure reflectance, transmittance and
absorption while utilizing dual, calibrated
integrating spheres to measure total
flux.

17. Radoma 1190 LED
Spectrometers
RadOMA 1190 Spectrometers have
been designed to provide maximum
performance at an affordable price for
industrial grade LED testing
applications.
The RadOMA 1190 is a high
performance, linear CCD spectrometer
with near real-time measurement speed
and NIST-traceable accuracy. The
spectrometer utilizes a 2048 element
detector with 16-bit resolution and a
USB 2.0 interface.
The spectrometer accepts an SMA905
fiber-optic input that can be connected
to a wide variety of optics including
integrating spheres for total flux
measurements or CIE127 Conditions A
and B for intensity.

18. ACCURATE AND REPEATABLE MEASUREMENTS

19. Long Term Repeatability
 900 measurements of an LED over 7.5 hours at 30 second intervals
 System included RadOMA Spectroradiometer, Keithley 2430 and a 1m Integrating
Sphere

20. Long Term Repeatability
 900 measurements of an LED over 7.5 hours at 30 second intervals
 System included RadOMA Spectroradiometer, Keithley 2430 and a 1m Integrating
Sphere
0.4435
0.444
0.4445
0.445
0.4455
0 2 4 6 8
CIE x
CIE x
0.424
0.4245
0.425
0.4255
0.426
0 2 4 6 8
CIE y
CIE y

21.  Gamma Scientific instruments are trusted by leading
global organizations that require high-
speed, precision measurements and custom
configurations for the most challenging
environments
 With over 50 years of innovation in light
measurement, Gamma Scientific has the expertise
to consistently deliver instruments with accurate and
repeatable measurement capabilities
Conclusion