Glare Test System

The GTS-LS Glare Test System utilizes an F24-70mm lens and a fisheye lens to measure outdoor disability glare and indoor discomfort glare, respectively. The software automatically identifies the background area and the observation area within the human eye’s field of view and calculates the contribution of each light source to glare. The system completes the capture, analysis, and report generation within min 2seconds, enabling rapid and automated analysis and evaluation of lighting scenarios.

Conventional glare testing uses an imaging luminance meter, whose sensor covers only one-sixteenth of that of the GTS-LS and can capture only a 41°*32° field of view in a single acquisition. To meet the UGR (Unified Glare Rating) viewing angle requirement of 144°*124.5°, this type of testing method employs a process similar to the panoramic photo function of smartphones, where the luminance meter is rotated to cover a 180° field of view. The testing scene is divided into multiple sections for repeated measurements, followed by image stitching. However, image stitching inevitably distorts and alters the shape and brightness of the luminaires, irreversibly impacting the accuracy of the measurement results. Additionally, this method results in extended testing times.

Specification:

Note: LISUN model GTS-LM is a dedicated version for indoor UGR, LISUN model GTS-LS is a full-function version for indoor UGR and outdoor TI\GR\DGI.

Region Transformation
Measuring road glare requires assessing the longitudinal uniformity, overall uniformity, and average luminance of the road surface. According to the IEC 60050-841: 2014 (GB 5700) standard, the measurement points on the road surface must be evenly distributed. When using a glare luminance meter for road imaging, the road surface appears as a trapezoidal region in the luminance image. To address this, the software provides a quadrilateral-to-rectangle transformation algorithm for luminance uniformity analysis.

Region Transformation

Automatic identification and classification of light sources
Glare evaluation requires information on the spatial position, solid angle, average luminance, and illuminance of each light source. Therefore, the glare luminance meter features a luminance threshold-based light source identification algorithm, which can detect, label, and classify each light source. Based on glare calculation standards, the algorithm determines whether each light source should be included in the glare measurement results.

Automatic identification and classification of light sources

Flickering light source correction
In China, the power supply frequency for electric light sources is 50-60Hz, resulting in a flicker period of approximately 10Hz. For glare measurements, the exposure time for luminance measurement is typically set at 1/1000s, which is much shorter than the flicker period of the light source. This fluctuation in light output significantly affects the repeatability of glare measurement results. Our provided flicker light source measurement mode effectively mitigates the impact of light source flicker on measurement results.

Flickering light source correction

Field of view correction
Indoor UGR (Unified Glare Rating) and DGI (Daylight Glare Index) measurements both use a fisheye lens with a 180° field of view. However, the human eye’s observation field of view is 143° horizontally and 124° vertically. Therefore, glare analysis needs to be adjusted according to the human eye’s observation range. Konia Optoelectronics provides a field-of-view correction function tailored for human eye observation.

Field of view correction

Customize light source analysis area
When optimizing the design of lighting scenarios, it is essential to understand the contribution of each luminaire or light source at specific locations to glare. This information is used to adjust and optimize the installation position and angle of the luminaires. Konia Optoelectronics offers a manual selection feature that allows users to delineate specific light source areas and provides the glare contribution of the selected region independently.

Customize light source analysis area

Application1：Road lighting
• Compliance with Standards: CJJ 45-2015 Urban Road Lighting Design Standard, IEC 60050-841: 2014 (GB 5700), EN 13201
• Standard Test Configuration: GTS-LS Glare Luminance Meter, 24-70mm Standard Lens, ND Attenuation Filter Set, Glare Testing Software
• Measurement Parameters: Average Road Surface Luminance, Longitudinal Uniformity, Overall Uniformity, Threshold Increment (TI)

Road lighting

Application 2: Tunnel lighting
• Compliance with Standards: JTGT D70/2-01-2014 Design Specifications for Highway Tunnel Lighting, CIE 88-2004
• Standard Test Configuration: GTS-LS Glare Luminance Meter, 24-70mm Standard Lens, ND Attenuation Filter Set, Glare Testing Software
• Measurement Parameters: Luminance Outside the Tunnel (L20), Tunnel Wall Luminance, Road Surface Luminance, Threshold Increment (TI)

Tunnel lighting

Application 3: Interior lighting
• Compliance with Standards: IEC 60598-1: 2014 (GB 50034-2013) Standard for Lighting Design of Buildings
• Standard Test Configuration: GTS-LS Glare Luminance Meter, f8mm Fisheye Lens, ND Attenuation Filter Set, Glare Testing Software
• Measurement Parameter: Unified Glare Rating (UGR)

Interior lighting

Application 4: Stadium lighting
• Compliance with Standards: JGJ 153-2016 Standard for Lighting Design and Testing of Sports Venues, IEC 60598-1: 2014 (GB 50034-2013)
• Standard Test Configuration: GTS-LS Glare Luminance Meter, f8mm Fisheye Lens, ND Attenuation Filter Set, Glare Testing Software
• Measurement Parameter: Glare Rating (GR)

Stadium lighting

Application 5: Building lighting
• Compliance with Standards: IEC 62006: 2009 (GB 50033-2013) Standard for Daylighting Design of Buildings
• Standard Test Configuration: GTS-LS Glare Luminance Meter, f8mm Fisheye Lens, ND Attenuation Filter Set, Glare Testing Software
• Measurement Parameter: Daylight Glare Index (DGI)

Building lighting

Application 6: Vehicle-mounted road lighting analysis system
• Compliance with Standards: IEC 60598-1: 2014 (GB 24827-2015) Performance Requirements for Road and Street Lighting Luminaires
• Standard Test Configuration: GTS-LS Glare Luminance Meter, 24-70mm Standard Lens, ND Attenuation Filter Set, Glare Testing Software
• Measurement Parameters: Illuminance, Luminance, Chromaticity, Threshold Increment (TI)

Vehicle-mounted road lighting analysis system

Application 7: Road Interference Light Analysis
• Compliance with Standards: IEC 61000-4-6: 2013, IEC 61000-4-3: 2010 (GB/T 35626-2017) Specification for Limiting Obtrusive Light from Outdoor Lighting
• Standard Test Configuration: GTS-LS Glare Luminance Meter, 24-70mm Standard Lens, ND Attenuation Filter Set, Glare Testing Software
• Measurement Parameters: Vertical Illuminance, Luminance, Luminous Intensity, Threshold Increment (TI)

Road Interference Light Analysis

Application 8: Landscape Lighting
• Compliance with Standards: IEC 61000-4-6: 2013, IEC 61000-4-3: 2010 (GB/T 35626-2017) Obtrusive Light Limitation Specification for Outdoor Lighting
• Standard Test Configuration: GTS-1 Glare Luminance Meter, f8mm Fisheye Lens, ND Attenuation Filter Set, Glare Testing Software
• Measurement Parameters: Vertical Illuminance, Luminance, Luminous Intensity, Glare Rating (GR)

Landscape Lighting