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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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An advanced laser headlight module employing highly reliable glass phosphor
Optics Express
|February 9, 2019
Summary
This study presents an advanced laser headlight module (LHM) using a novel, low-temperature fabricated glass phosphor for improved thermal stability. The developed LHM meets automotive regulations and shows promise for next-generation vehicle lighting.
Area of Science:
- Optoelectronics
- Materials Science
- Automotive Engineering
Background:
- Traditional automotive lighting systems face limitations in efficiency and performance.
- Developing advanced lighting solutions is crucial for enhancing vehicle safety and energy efficiency.
- Laser headlight modules (LHMs) offer potential for superior illumination characteristics.
Purpose of the Study:
- To demonstrate an advanced laser headlight module (LHM) utilizing a novel, highly reliable glass phosphor.
- To investigate the thermal stability and performance of a low-temperature fabricated glass-based YAG phosphor-converter layer.
- To evaluate the suitability of the developed LHM for next-generation automobile headlight applications.
Main Methods:
- Fabrication of novel glass-based YAG phosphor-converter layers at a low temperature of 750°C.
- Assembly of the LHM comprising a blue laser diode array, aspherical lens, glass phosphor-converter layer with aluminum substrate, and dichroic filter.
- Characterization of the LHM's optical power, luminous flux, color temperature, efficiency, and high-beam patterns.
Main Results:
- The glass-based phosphor-converter layers exhibited enhanced thermal stability.
- The LHM achieved a total output optical power of 6 W, luminous flux of 1860 lm, and efficiency exceeding 310 lm/W.
- High-beam intensity measurements satisfied the ECE R112 class B regulation.
Conclusions:
- The developed LHM with a reliable, low-temperature fabricated glass-based phosphor-converter layer offers high performance.
- The LHM demonstrates excellent thermal stability and meets stringent automotive lighting regulations.
- This high-performance LHM is a promising candidate for future automotive headlight systems.
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