Cold Light Control - Senze-Instruments Benelux

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Process & Quality Control

Cold Light Control

Temperature > Validation Hospital & Industry

GL optic mini-spectrometer :
precise Light Measuring Technology in a handy size

GLOptic is the brand name of Just Normlicht GmbH Germany the worlds’ leading supplier of 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 standardized viewing conditions. Since 2009 under the brand of GLOptic, JUST is developing and distributing a complete product line of precise spectral light measuring devices.

Senze-Instruments present you with the new GL optic mini-spectrometer for various applications.

This high-quality and easy-operating device gives you all you need for reliable light measurement. Check out the unique capabilities of GL optic mini-spectrometer.

GL optic mini-spectrometer is a practical and reliable measuring device. It is ready to work immediately after connecting to your PC. No extra power supply is required. Thanks to its high sensitivity and accuracy it is a perfect solution in light measurement.

Different light sources like LED, Fluorescent Lamps or LCD Displays require different optical probes. Mini-spectrometer can be combined with additional equipment to measure all different light sources, displays as well as LED light. Find out more about our best mini-spectrometer available on market now!

GL optic mini-spectrometer’s optical systems and software can be easily adapted to meet any customers’ needs.

• high sensitivity and precise calibration
• low noise and stable measurements
• ready to work when connected to PC after approximately 10 min
• small size and low energy consumption
• powered via USB connection

• different light sources measurements: halogens, fluorescent lamps
• LED measurement and testing compliant to with CIE 127
• display measurement

SPX driver Software

GL optic spectrometers are delivered with SPX free-of-charge software pack. It is a driver software for measuring  devices which enables the computer system of your PC to control and communicate with the device.

It also features the measurement mode to run measurements when the spectrometer is connected to your PC. This software gives you information on  the native data of measured spectra as well as a simple graphical representation. The data can be later processed either in spreadsheets or other spectral analysis programs.

SPX controls the measurement process and you can set proper integration  time depending on light conditions and also determine the number of repeated measurements. It is possible to save data in the *csv format which can be imported into Excel. Native data show the spectral value of the test results in each specific wave length.  For the mini-spectrometer the data is obtained in a 1,7nm interval. The bottom line of the screen shows the status of the device, spectrometer identification number and indicates the temperature of the spectrometer.

The SPX software contains all the necessary options
for bandpass error correction, correction of baseline
level changed by temperature and calculation procedure
for OSR* system /Optical Stray Light Reduction/ to
determine and correct the influence of stray light
on measured spectra.

Technical data sheet

Spectral range                             340-750 nm
Detector                                     CMOS image sensor with slit
Numer of pixels                           256
Physical resolution                       ~ 1.7 nm
Wavelength reproducibility             ± 0.5 nm
Integration time                          5 ms to 100 s
A/D conversion                           16 bits
Signal to noise ratio                    1000:01:00
Stray light                                  2*10E-3
Optical FWHM                            12 nm
Spectroradiometric accuracy         ± 4%
Measurement uncertainty of color  ± 0.0015
coordinates (x,y)
Connector for optical fiber            SMA905D
PC interface                                USB 2.0 standard
Power consumption                     USB current consumption < 100mA
Ambient temperature                   5-35 °C
Dimensions                                     62x115x19/30 mm
Weight                                           90 g

GL optic mini-spectrometer is a practical and reliable measuring device.

That's the ideal technician tool to work on site, in labs, in plant.

It is ready to work immediately after connecting to your PC.

GL Optic integrating sphere 48mm

GL Optic integrating sphere is an accessory for our mini-spectrometer for luminous flux measurement of LEDs and other small light sources.

Thanks to its well known characteristics integrating sphere helps to get the ideal light distribution and proper measurement of light power.

It is the ideal tool for LEDs quality control /binning/ where such features like color temperature  and color coordinates are important.

The set includes the sphere in housing with a coder for automatic detection of the accessory. It is delivered with the certificate of factory absolute spectral calibration.
• Small size portable measuring tool
• Ideal for binning and quick quality control of LEDs
• Ready to work immediately after connection to mini - spectrometer
• Automatic calibration file download
• High precision of test results

The testing procedure gives information on luminous flux, color coordinates and color temperature.

GL Optic integrating sphere GLS205 AND GLS125
“The ultimate solution for luminous flux and radiant power measurement of LEDs.”

The GL Optic Integrating Sphere GLS 205 has been designed for the measurement of Luminoux Flux and Radiant Power of LEDs and other light sources compliant with the recommendation of the CIE Technical Committee published in Technical Report CIE 127:2007.
The geometry of the sphere allows the installation of different adapters to measure all kinds of light sources. Conforming to CIE recommendations front emitting diodes can be measured at the wall entrance in 2π geometry. Other types of LEDs should be measured at the center of the sphere in 4π geometry.

The entrance of the sphere is equipped with a precisely designed 50mm aperture which can be used in Partial Flux measurements of LEDs. For this application the test LED is installed outside the sphere at determined distance and the flux is measured inside the sphere. Appropriate accessories are available for specific measurement purposes. The GLS 205 features the auxiliary light source for compensation of the self-absorption effect of the test LED.

Inner walls of the sphere are coated with barium sulfate / BaSO4/ which ensures high reflectance properties up to 97%. On demand for specific applications gold plating of inner walls can be offered.

The GL Optic spheres are available in 2 sizes:
• GLS125 with 125mm diameter as a low-cost solution
• GLS205 with 205mm diameter conforming to CIE standards for LED measurement.

All GL Optic spheres are universal and can be used with the PROFI SPECTROMETER with fiber optics bundle or with the mini-spectrometer with a proper adaptor installed directly on the sphere

• Measurement of LEDs compliant with CIE 127:2007
• Total Luminous Flux or Partial Flux measurements
• Geometry for front emitting diodes and other sources
• Universal ports for SMA fiber optics or mini-spectrometer

Technical Data Sheet:
Sphere inside diameter 205 mm
Entrance aperture diameter 50 mm
Outside dimensions 265mm x 270mm x 225mm
Spectral range 240 – 2600nm
Inner coating Barium sulfate (BaSO4)
Auxiliary light source  White LED
Weight  3.3kg


For customer using different lights sources with different diameters, we propose the GLS 205 with a special aperture system  :  the high Performance Iris Diaphragms.

This allow to adjust the opening manyally from 2,5 to 50 mm opening.

Ref. GLS205IW

Diam. 1100 cm                 

GL Optic display sensor

This display sensor from GL Optic is an accessory which is designed to be used with our mini-spectrometer for luminance measurement of flat LCD and OLED panels, and plasma FPDs. It is also a perfect solution for testing projection displays as well as for OLED light source measurement.

The set includes an optical measuring probe, fiber optics and adaptor for the mini–spectrometer  with a coder for automatic detection of accessory calibration file. It is delivered with a certificate of factory absolute spectral calibration. The measuring probe can be installed on a tripod for distance measurements. Alternatively, it can be hanged  directly on a screen with the use of a special stripe for contact measurements.

• Small size portable device
• Ready to work immediately after connection to mini - spectrometer
• Automatic calibration file download
• High precision of test results

Measuring point diameter :   10mm
Spot size in 1m distance :    approx. 5cm
Spectral range :                  from 400nm to 730nm
Measuring probe size :         44mm x 62mm x 14mm
Fiber optic length :               1,5m
Measurement uncertainty (x,y): + / - 0,002
Standard testing range :     from 1cd/m2 to 5.000cd/m2
[lower range require longer integration time]

The testing procedure gives information about luminance and color coordinates [ x, y, Y] and conforming to CIE standards.

GL SpectroSoft Software Options

GL SpectroSoft is an intuitive and user friendly software package for
complete and advanced spectral analysis.

It is an easy to use system with the following features:
• absolute or relative measurements
• flexible data interpretation
• helpful tools for easy analysis and interpretation of measured spectra
It is a helpful tool for laboratory application as well as for field work in production quality control and for general light assessment purposes.

The software interface gives the user quick access to useful information and functions. You can easily analyze the spectrum in the graphic format and check the data in many different ways.

The windows can be rearranged in order to show the information required by the user.

GL SpectroSoft Basic contains following features:

Calculation of tri stimulus values for the specification of light source color coordinates according to CIE standards: CIE 1931 2⁰ observer and CIE 1964 10⁰ observer.
It is also presented in Chromaticity Diagrams conforming to CIE.
You can select diagrams CIE 1931, CIE 1964 and CIE 1976 amended Uniform Chromaticity Scale which give better presentation of colors.

Other calculations give important information about:
• Correlated Color Temperature of a light source CCT – Kelvin value
• Chromaticity Error
• Color Pick
• Color dominant

GL SpectroSoft CRI:

This option includes calculation for Ra values according to CIE 13.3 standard.

CRI /color rendering index/ value indicates the quality of light and shows how it influences color appearance of objects in this light.

GL_ SpectroSoft MI

This option includes the calculation for Mivis and Miuv conform to ISO 23603

Metamerism is the matching of apparent  color of objects with different spectral power distributions

GL_ SpectroSoft ISO 3664 assessment

This software option is a user-friendly, preconfigured mode for the assessment of the lighting installation according to ISO 3664. It features the option for illuminated areas <1m2 and >1m2 as required by the standard. The software directs you through the measurement procedure by indicating where the MINI-SPECTROMETER should be placed allowing you to simply take 9 measurements in the specified areas. The pass/fail function will indicate which of the 9 areas meet the requirements of the ISO 3664 standard. During the procedure the measurement values will appear in the chart. After the assessment is finished the calculated data is displayed on screen and you can create a printable report.

This option includes the procedure and calculations of data describing light source quality for viewing conditions in the Graphic Arts and printing industry.

GL SpectroSoft Pro

GL SpectroSoft Pro option includes all the above mentioned options and procedures and additionally features the transmission measurement mode. This option can be used for quality control of optical lenses, filters and other materials and procedures where the change in transmission spectra provides significant information for quality or process control.
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Exemple of xls report created by exportation.          
Test before and after the changing of lamps in a Biluribin Light

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