GL Gonio Photometer GLG A 20-300

A new model of Type A goniophotometer providing photometric characterization of lamps in H, V axis coordinates.

Home / Products / GL Gonio Spectrometer GLG A 20-300
GL Optic Goniophotometer for measurements of car and other vehicle lamps


Automotive and other vehicle lighting product compliance testing becomes a challange for many engineers in the industry. It’s mainly because the cost optimization and increasing speed of new products introduction onto the market puts additional pressure to measure more, faster and better.

The GLG A 20-300 goniophotometer has been designed for every day application in R&D laboratories and product compliance testing center labs where dependable data is provided by truly user friendly photometric instruments system.

Following the industry standards this goniophotometer system is ready to photometric testing of vehicle LED and other types of lamps luminous intensity distribution in H,V coordinates. Robust design, user friendly interface and top level accuracy available for fast developing industry.

Standards compliance

The GLG A 20-300 goniophotometer systems are type A systems compliant with the CIE 121-1996 and IESNA LM-75-01 standards regulating far-field photometric and colorimetric measurement systems.

Reliable and accurate

The system uses tried-and-tested mechatronic components to provide fast, accurate and reliable measurements of automotive, rail and other vehicle headlamps. Additionally, it can be used for photo-metric characterization of traffic signal lamps and airfield lighting systems. This goniophotometer system is designed for lamps of up to 20 kg and the x,y translation stage surface size is 300 x 300 mm.

Controllable and programmable

Depending on the application the system can be paired with the following measuring instruments:
GL PHOTOMETER 3.0 LS + Flicker
A selection of peripheral devices for tests of vehicle headlamps is available.

GLG A 20-300 Usage

Larger capacity

Production and development teams constantly improving lamps and fixtures make more efforts to provide specifications of their products and verify compliance. This creates increasing demand for faster and more flexible light measuring systems. As changes in the industry are speeding up and products are getting more sophisticated, the need for testing and verification becomes more critical.

This type A GL Goniophotometer can be used in factory laboratories as well as in accredited laboratories and deliver fast and reliable results for the measurements of small and lager lamps. Mechanical design includes increased load capacity up to 20kg, large 300x300mm mechanical stage and 3 motorized axis featuring absolute encoders for improved accuracy.

With easy to use software, precise alignment protocols and extensive automation capabilities, the system offers a new level of performance and usability.

Speedier lamp testing

Default measuring instrument included in the system is the GL PHOTOMETER 3.0 LS + Flicker which has been designed for On Fly ( non stop ) measurements of automotive and other lamps on goniophotometer.

High sampling rate combined with high sensitivity HAMAMATSU sensor allows for continuous measurement of LED during smooth movement of DUT ( Device Under Test ) Thanks to absolute encoder readings the required data can be obtained in much shorter time.

With this super fast measuring instrument, additional light modulation characterization for turn lights and emergency signals is available using the flicker measurement functionality.

Need to measure color?

The GL goniospectrophotometer design offers a turn-key LED light measurement system which can be equipped with one of our optional spectroradiometers to add full color measurement capability.

The GL SPECTIS 5.0 can be used for advanced systems covering extended spectral analysis also outside the visible range from UV to NIR sources angular distribution in a variety of applications.

Our basic instrument GL SPECTIS 1.0 LS is a high sensitivity version of our popular spectroradiometer optimized for fast photometric & colorimetric measurements.

GLG A 20-300 Features

A Standard Goniometer System Includes:

  • Programmable, robust and accurate Type A goniometer with 3 mechanized H,V and Z axes and DUT moving x,y mechanical mounting table
  • A preconfigured, turn-key system including all instruments with software and a dedicated PC which is tested prior to shipment to customer
  • Unique laser alignment system with mirrors and system control options helps to calibrate system vertical and horizontal alignment and also faster photometric positioning of DUT*
    On-fly measurements available with this new optional instrument combined with optical flicker characterization of DUT*

Optional peripheral devices


High sensitivity version of our popular spectroradiometer optimized for fast photometric & colorimetric measurements


for extended spectral analysis outside the visible range from UV to NIR sources angular distribution in a variety of applications


Choose form available power supplies and current sources for a full electrical characterization of DUT. Advanced power meters and fast current sources from leading suppliers available on demand


TEC controllers and mounts for LED modules thermal stabilization and measurements during goniometric tests are available

  • Support & Installation

Online and On-site extensive know-how support for end-users to help them manage their complex measurements

GLG A 20-300 Metrics

Photometric Quantities

  • Luminous Intensity Distribution Diagrams
  • Luminous Flux
  • IEC, IES and LTD Formats
  • Centre Beam Intensity

Colorimetric Quantities

  • Correlated Color Temperature – CCT and Duv
  • Color Rendering Indices – Ra, CRI, R1 to R15, TM-30
  • MacAdam Ellipses
  • Angular Color Uniformity

Other Quantities

  • Luminous Efficacy (lm/w)
  • Power Factor
  • Temperature

GLG A 20-300 Specifications

CIE Goniometer typeFar Field Type A with H and V optical axis DUT moving x,y mechanical table 3 axis stepper motors with worm drive gear boxes with absolute encoders
Angular range H and V axis± 90°
Angular range axis± 180° theoretical (usable depending on geometry due to shadowing)
Angular positioning precision0.1°
Reproducibility H axis0.50°
Reproducibility V axis0.50°
Angular speed H axisup to 4.5°/s
Angular speed V axisup to 4.5°/s
Z axis travelling range<700 mm; stepper motor operated
Photometric distance10 – 25 m
DUT mounting plate (bread board)Round d=180 mm with x,y 300x300mm mechanical stage Fixing: multiple mounting holes: M3, M4, M5, M6; chuck with sliding blocks
Goniometer dimensions1560 x 1670 x 800 mm (W x H x D)
Maximum operating footprint diameter2400 mm
Maximum load20 kg
Goniometer weight~320 kg
Power supply and max. ConsumptionPC connection by USB A-B 110–230V 1200W
Sensor typeGL PHOTOMETER 3.0 LS + Flicker GL SPECTIS 1.0 LS GL SPECTIS 5.0

Related Products



Discover the new compact size laboratory grade spectrometer.



Rack mounted laboratory grade spectrometer module.



Advanced Spectroradiometer with Optical Stray Light Reduction* for high precision light assessment.