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The role of rapid spectral analysis system in the safety certification of car lights and signal lights
Date: 2025-11-24Read: 6
In the field of automotive and traffic lighting, the optical performance of car lights (headlights, daytime running lights, taillights) and signal lights (traffic lights, railway signals) is directly related to driving safety and regulatory compliance. With the popularization of LED technology, traditional filtering metering devices are no longer able to meet the detection needs of multi color temperature, narrow spectrum, and high dynamic light sources.Rapid Spectral Analysis SystemWith millisecond level full spectrum acquisition capability, it has become a key technical means in global safety certifications such as ECE, SAE, GB, DOT.
The system uses a high-sensitivity CCD or CMOS array spectrometer to obtain a complete spectrum of 380-780nm (even extended to ultraviolet/infrared) within 10-100ms, and then accurately calculate:
Chromaticity parameters: CIE x, y or u ', v' color coordinates, ensuring that the color of the signal light complies with international standards (such as red light main wavelength of 625 ± 5nm);
Brightness and intensity distribution: Using an integrating sphere or a distributed photometer, verify whether the low/high beam cutoff line of the headlight is compliant;
Color rendering and flicker index: Evaluating the impact of daytime running lights on driver visual comfort;
Photobiological safety: detecting whether the blue light hazard (IEC/TR 62778) exceeds the standard.
In the certification process, the rapid spectroscopy system has significant advantages:
High efficiency: With a single measurement, dozens of parameters such as color temperature, finger count, peak wavelength, and full width at half maximum can be output, replacing multiple traditional instruments;
High precision: avoids filter aging or matching errors, especially suitable for complex spectral analysis of RGB multi chip LEDs;
Traceability: The system is calibrated with standard light sources traceable by NIST or PTB, and the data is widely accepted by certification bodies such as T Ü V, SGS, and China Automotive Research Institute;
Automation integration: It can be embedded in the final inspection station of the production line to achieve 100% online detection and prevent the outflow of non-conforming products.
For example, in the certification of GB 11554-2008 "Motor Vehicle Reflex Reflectors" or GB 13954-2022 "Special Vehicle Marking Lamps for Fire Trucks and Other Special Vehicles", if the chromaticity deviation exceeds Δ u'v '=0.005, it is judged as unqualified, and only high-resolution spectral systems can reliably distinguish it.
In the future, with the emergence of new technologies such as adaptive headlights (ADB) and Micro LED signal lights,Rapid Spectral Analysis SystemIt will also integrate spatial imaging and dynamic modulation analysis functions to continuously safeguard the safety boundary of road lighting environment.