GL Optic provides comprehensive light measurement solutions ranging from measurement of single LED emitters to complete luminaire testing. Their solutions include spectrometers, integrating spheres, and software for measuring parameters such as illuminance, luminous flux, luminance, and more in order to evaluate and quality check light sources."

1. GL Optic Light measurement solutions
created by JUST Normlicht

2. About us:
GL Optic is the brand name of JUST Normlicht GmbH Germany the
world's leading supplier of the standardized light solutions for printing
and graphic arts industries. For more than 30 years JUST has been
developing the innovative solutions which are of the highest quality in
standard-light viewing conditions.
The spectral light measurement project was created at the end of 2009
by Michael Gall the owner and CEO of JUST Normlicht in cooperation
with Jan Lalek, a physicist who had previously partnered with JUST in
the creation of the innovative LED tunable standard lighting systems.
They also developed together the light quality assurance instruments
installed at the JUST spectral measurement laboratory.

3. GL SPECTIS series
The spectral measurement instruments
New !

4. GL SPECTIS 1.0
• High sensitivity and precise calibration
• Automatic base line correction and low noise level
• Spectral Range 340–750 nm or 640 -1,100nm
• Data Point Intervall 1.7nm
• Ideal for measurement of LEDs and OLEDs
• Includes SPX Driver Software
Different accessories:
• Display Sensor for Luminance measurements of
displays and OLEDs
• Integrating Spheres For Luminous Flux and Radiant
power measurement of single LEDs.

5. GL SPECTIS 1.0 touch
practical and reliable light measurement
• Built off of GL SPECTIS 1.0
• Andriod Based Operating system
• Battery operated for up to 6 hours
• Wi-Fi, USB and MicroSD card communication
• CCT, CRI, Lux, Chromaticity Coordinates on screen
Different accessories:
• Display Sensor for Luminance measurements of
displays and OLEDs
• Integrating Spheres for Luminous Flux and Radiant
power measurement of single LEDs.

6. GL SPECTIS 5.0 touch
High class Spectroradiometer with high resolution and
extended spectral range
• Optical stray light reduction (OSR)*
• Back-thinned CCD Sensor with spectral range from
200 to 1050 nm.
• High sensitivity and precise calibration
Ideal for evaluation of light sources and optical
components like lenses, filters etc.
Can be used for measurements and evaluation
conforming to Photobiological Safety of Lamps
standard

7. GL SPECTIS 8.0
Advanced Spectroradiometer with Optical Stray
Light Reduction* for precise light measurement
• back thinned CCD Image Sensor with cooling
• Hi sensitivity and low stray light thanks to
transmission Grating
• Precise calibration
Different accessories available:
• Integrating spheres with auxiliary light source for
Flux measurement of LEDs according to CIE 127
standard
Measurement of different light sources: fluorescent
tubes, LEDs, OLEDs, filters, lenses and other
production process control measurements.

8. GL OPTI SPHERE 48
For single LED testing

9. GL OPTI SPHERE 205
For LED modules and single LEDs

10. GL OPTI SPHERE 500
For retrofit LED lamps and LED modules

11. GL OPTI SPHERE 1100
For large LED lamps and large LED modules

12. GL OPTI SPHERE 2000
For large LED luminaires and LED components

13. SUMMARY
“From single LED emitter measurement to complete luminaire
testing, GL Optic provides comprehensive light measurement
solutions.”

14. What can we measure?

15. Illuminance measurement [lux]
Irradiance [ mW/m^2/nm ]
What is illuminance?
It is the total luminous flux incident on a surface, correlated with human brightness
perception.
How is it measured and which unit is used?
It is measured with a spectrometer with a cosine-corrected measurement probe called a
diffuser. It is placed on an examined surface and measures the luminous emmitance in lux
[lx].
What does it give us?
It is a very practical method of determining the level of light on surfaces such as those of
working tables, pavements, roads or shelves. Illuminance is inversely proportional to the
square of the distance from the source.

16. Illuminance measurement
It is measured with a spectrometer with a cosine-corrected measurement probe called a
diffuser. It is placed on an examined surface and measures the luminous emmitance [lx].
Lux [lx]

17. Luminous Flux [ lm ]
Radiant power [ W ]
What is a luminous flux?
It is the total measure of the perceived power of light in relation to the spectral sensitivity
of the human eye.
How do we measure it?
Luminous flux is measured with a spectrometer connected to an integrating sphere. This
method allows to determine the total amount of energy emitted by an examined source
in all directions. The SI unit of luminous flux is lumen [lm].
What does it give us?
It allows to determine the total amount of light emitted by a source in every direction,
taking into account the sensitivity of the human eye. Such measurement provides a basis
for calculating other parameters and can be used for comparing different light sources.

18. Luminous Flux [ lm ]
Luminous flux is measured with a spectrometer connected to an integrating sphere.
Lumen [lm]

19. Luminance measurement [ cd/m^2 ]
What is luminance?
Luminance is a photometric measure of luminous intensity of light that is emitted or
diffused by a particular area.
How is it measured and which unit is used?
It is measured with a measuring adapter with a lens directed towards the examined
surface. The SE unit is candela per square metre [cd/ m²].
What does it give us?
It allows to assess the brightness of a particular surface and is especially useful when
measuring the brightness of screens and displays, airport aprons and runways, roads
lighted with street lamps etc.

20. Luminance measurement [ cd/m^2 ]
It is measured with a with a lens directed towards the examined surface.
[cd/m²]

21. Typical applications

22. MEASUREMENT OF SINGLE LEDs
Small and Precise LEDs measurement solution
Did you know that electric current, electronic drivers and even heat may negatively affect
lighting properties of LEDs?
These are some of the reasons why measuring the performance of single LEDs may be
necessary once they are installed on PCB.

23. RETROFIT/REPLACEMENT LED LAMPS
Preconfigured setup for flux measurement
Whether you import or develop retrofit or new LED fixtures there are always many
questions which you need to find answers to. What is the real performance of
replacement LED lamps? Are they bright enough to suit my needs?
Our solution will provide you with all the answers you need – just take the measurement
inside the GL OPTI SPHERE 500 and check the Radiant Power emitted by the lamp.

24. LUMINAIRES MEASUREMENT
Complete and affordable system for LED luminaires testing.
Did you know that all parts of modern lighting fixtures can influence the performance of
LEDs inside?
Mirrors, lenses, diffusing materials and heat control systems can change color, lumen
value or a lifetime of your products.

25. GL SPECTRO SOFT

27. SOFTWARE LICENSES
- GL SPECTRO SOFT BASIC
- GL SPECTRO SOFT PROF
- GL SPECTRO SOFT LAB
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- GL SPECTRO SOFT CAL

28. Need more details?
• Call Saelig Co. Inc.
• 585-385-1750
• Or sales@saelig.com