High-end modular spectroradiometer for variety of applications


New level of high-precision testing of light sources

The primary goal in designing the new spectroradiometer was to develop a new modular technology for optical radiation measurements. The idea was to design an instrument which could be tailored to customers individual needs and still maintain laboratory grade accuracy.

High-end spectroradiometer

Thermal stabilization applied directly to the detector reduces noise and the values of dark current, which directly improves the measurement capabilities of low-level signals, especially in the ultraviolet range (e.g. LED UV-C). The solution will also ensure independence from the ambient temperature in the application range.
The variable optical path module ensures flexibility in adjustment of the optical properties of the system to the nature of the measured signal by changing the aperture and filters. This solution allows the user to quickly adapt the instrument to particular measurement needs, often eliminating the need to install a dedicated measuring probe for each application. All while maintaining calibration parameters for all optical path configurations.

The latest technology

GL SPECTIS 4.0 M high-end spectroradiometer features the latest optical solutions for precise light quality control in a variety of applications. For demanding measurement applications in the laboratory or production environment, it is equipped with Peltier module, which reduces measurement uncertainty due to lower signal noise and minimized dark current levels.

Flexibility for every industry

With its universal modular design, GL SPECTIS 4.0 M is a perfect choice to easily build a dedicated measuring instrument. By adding an extra filter it is possible to extend spectral range for specific needs. When connected to an integrating sphere, the measurement of total luminous flux and radiant power is possible. When combined with luminance / radiance telescopic probes, specialized evaluation of optical radiation related hazards and light quality can be performed.

Precise factory calibration

We value proper calibration procedures and smart system design. Each spectroradiometer is individually calibrated and before the Absolute Spectral Calibration process, various pre-calibration stages are performed, such as wavelength calibration, non-linearity correction, and stray-light examination.

GL SPECTIS 4.0 M Usage

This measuring instrument was designed to meet specific requirements in advanced applications. It covers an extended spectral range from 200-1050 nm (UV-VIS-NIR). It features high performance optical components and is delivered with a multi-step, traceable factory calibration. Available on demand rack housing helps with easy integration with stationary laboratory measuring stands or production testers. Ethernet connection ensures stability and reliability of operation. A range of GL OPTI PROBES equipped with quick connectors introduce unprecedented simplicity.

Assessment of photobiological safety in the UV range

The use of this module allows for precise measurements in the area of photobiological safety and actinic effects of optical radiation. GL SPECTIS 4.0 M UV performs measurements in the ultraviolet range with high optical resolution of <1 nm (FWHM). The device can be calibrated to measure absolute values of irradiance in the range of 200 nm – 400 nm.
Improving the quality of ultraviolet measurements is crucial in assessing photobiological risk and validation of radiation sources used for disinfection and medical applications.

Professional LED characterization

This high-end spectroradiometer is perfect for LED characterization, as it can be paired with any of our integrating spheres and goniometer systems for measurements in accordance with CIE 127:2007 and CIE 025/E:2015. The high accuracy and resolution make it an ideal instrument for measurements confirming to (IES) LM-79-08 and other international standards.

GL SPECTIS 4.0 M Features

Benefits of modular technology

The greatest benefit resulting from the modular structure of the device is the ability to adjust the configuration of the system and of the spectroradiometer itself to fit the individual needs of each customer. If necessary, the unit’s functionality can be expanded with additional modules even many months after purchase.

Variable optical path

The variable optical path module allows for adjustment of the optical path to the nature of the measured signal by changing the aperture and filters that influence the readings. This solution accommodates the need to quickly adapt the instrument to specific measurement requirements without the need to switch to a dedicated measuring probe. All while maintaining calibration parameters for all optical path configurations.

Thermal stabilization module

Thermal stabilization of detectors in GL SPECTIS 4.0 M devices is a solution based on direct stabilization of the sensor with a Peltier cell, without cooling the entire device. The module is designed to maintain the properties of the detector (linearity, noise level, dark current value) and enables measurements of low-level signals. The obtained measurement has lower uncertainty resulting from limited temperature fluctuations.

GL SPECTIS 4.0 M Metrics

Our preconfigured, individually calibrated spectroradiometers deliver precise results for nearly any practical optical radiation measurement application. It takes mere seconds to perform a measurement and review the results using the included software.

Using the GL SPECTIS 4.0 M with a suitable probe, you can measure any of the following optical quantities:

  • [lx]/[W/m2] – illuminance, irradiance
  • [lm]/[W] – luminous flux, radiant power
  • CRI – color rendering index according to the CIE
  • CCT – correlated color temperature according to the CIE
  • Color – chromaticity coordinates of the CIE 1931, CIE 1964 and CIE 1976
  • Fidelity and Gamut – method for evaluating light source color rendition according to IES TM-30 
  • PAR/PPFD – photosynthetically active radiation measurements for horticulture
  • EML – biological effects of light on humans in equivalent melanopic lux

    + many more!

    Whatever your application, our precise GL SPECTIS 4.0 M spectrometer is ideal.

GL SPECTIS 4.0 M Specifications

Laboratory and industrial measurements, daily quality control of LED production, UV and photobiological safety assessment, development of new designs of lighting fixtures
Spectral range200 nm – 1050 nm200 nm – 1050 nm200 nm – 400 nm
Optical resolution / FWHM2.5 nm3 nm0.5 nm
Wavelength accuracy0.5 nm0.2 nm0.2 nm
Datapoint interval~0.5 nm~0.5 nm~0.1 nm
Integration time10 ms – 10 s10 ms – 65 s10 ms – 10 s
7% within range 200 – 220 nm6% within range 200 – 220 nm
Radiometric accuracy:5% within range 220 – 500 nm4% within range 220 – 500 nm4% within range 200 – 400 nm
4% within range 500 – 1050 nm3% within range 500 – 1050 nm
Stray light (for LED)2E-42E-42E-4
Sensorback-thinned CCDback-thinned TEC CCDback-thinned CCD
Number of pixels204820482048
A/D converter16 bit16 bit16 bit
Signal to Noise Ratio1000:11000:1500:1
Flicker compensation
Temperature sensor and dark current compensationcompensationTemperature stabilization (cooling -5ºC) + compensationTemperature stabilization (optional)* + compensation
Uncertainty of color coordinates± 0.0015± 0.0015N/A
Automatic accessory detection
Automatic shutterN/A✓ (optional)N/A
Automatic filter wheel (4 customized filter slots for density filters available)N/A✓ (optional)N/A
PC connectionEthernetEthernetEthernet
Triggerterminal block 4 pinterminal block 4 pinterminal block 4 pin
Data formatXMLXMLXML
Fiber optic connectorquick releasequick releasequick release
Development kitDLL driver (SDK)DLL driver (SDK)DLL driver (SDK)
Ambient temperature range5 – 35°C5 – 35°C5 – 35°C
Dimmensions [H x W x D]70 x 250 x 300 mm70 x 250 x 300 mm70 x 250 x 300 mm
Rack adapter2U 19” (optional)2U 19” (optional)2U 19” (optional)
Weight5 kg5 kg5 kg
Power requirements5 V / 5 A DC5 V / 5 A DC5 V / 5 A DC
* Temperature stabilization at +15°C

Note: Instrument, firmware and software specification are subject to change without prior notice. All information included in GL OPTIC datasheets and product information available in any form are carefully prepared and included information believed to be true. Please note that discrepancies may occur due to text and/or other errors or changes in the available technology. We advise to contact GL Optic before the use of the product to obtain the latest product specification.

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