Optical design of automotive headlight system
incorporating digital micromirror
device

Chuan-Cheng Hung; Yi-Chin Fang; Ming-Shyan Huang; Bo-Ren Hsueh; Shuan-fu Wang; Bo-Wen Wu; Wei-Chi Lai; Yi-Liang Chen

doi:10.1364/AO.49.004182

Applied Optics
Vol. 49,
Issue 22,
pp. 4182-4187
(2010)
•https://doi.org/10.1364/AO.49.004182

Optical design of automotive headlight system incorporating digital micromirror device

Chuan-Cheng Hung, Yi-Chin Fang, Ming-Shyan Huang, Bo-Ren Hsueh, Shuan-fu Wang, Bo-Wen Wu, Wei-Chi Lai, and Yi-Liang Chen

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Chuan-Cheng Hung, Yi-Chin Fang, Ming-Shyan Huang, Bo-Ren Hsueh, Shuan-fu Wang, Bo-Wen Wu, Wei-Chi Lai, and Yi-Liang Chen, "Optical design of automotive headlight system incorporating digital micromirror device," Appl. Opt. 49, 4182-4187 (2010)

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Abstract

In recent years, the popular adaptive front-lighting automobile headlight system has become a main emphasis of research that manufacturers will continue to focus great efforts on in the future. In this research we propose a new integral optical design for an automotive headlight system with an advanced light-emitting diode and digital micromirror device (DMD). Traditionally, automobile headlights have all been designed as a low beam light module, whereas the high beam light module still requires using accessory lamps. In anticipation of this new concept of integral optical design, we have researched and designed a single optical system with high and low beam capabilities. To switch on and off the beams, a DMD is typically used. Because DMDs have the capability of redirecting incident light into a specific angle, they also determine the shape of the high or low light beam in order to match the standard of headlight illumination. With collocation of the multicurvature reflection lens design, a DMD can control the light energy distribution and thereby reinforce the resolution of the light beam.

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Test Points on the Screen		Illumination Requirements (Unit: Lux)
Headlight Used in Accordance with Keep-Right Laws		Design Value	Standard Regulatory Value
1	Point B50L	0.33	$\leq 0.4$
2	Point 75R	12.21	$\geq 12$
3	Point 75L	1.05	$\leq 12$
4	Point 50L	6.47	$\leq 15$
5	Point 50R	13.94	$\geq 12$
6	Point 50V	12.56	$\geq 6$
7	Point 25R	7.70	$\geq 2$
8	Point 25L	8.39	$\geq 2$
Any point in zone III		$< 0.67$	$\leq 0.7$
Any point in zone IV		$> 4$	$\geq 3$
Any point in zone I		$< 19.51$	$\leq 2 \times (50_{R})$

		Illumination Requirements (Unit: Lux)
Test Points on the Screen		Design Value	Standard Regulatory Value
1	$X = 0$ , $Y = 0$	38.74	$\geq 0.8 E_{\max}$
2	$- 1125 < X < + 1125$	$> 26$	$\geq 24$
3	$- 2250 < X < + 2250$	$> 19$	$\geq 6$
4	Any point	$E_{\max} = 49.02$	$240 lux \geq E_{\max} \geq 48 lux$

Test Points on the Screen		Illumination Requirements (Unit: Lux)
Headlight Used in Accordance with Keep-Right Laws		Design Value	Standard Regulatory Value
1	Point B50L	0.33	$\leq 0.4$
2	Point 75R	12.21	$\geq 12$
3	Point 75L	1.05	$\leq 12$
4	Point 50L	6.47	$\leq 15$
5	Point 50R	13.94	$\geq 12$
6	Point 50V	12.56	$\geq 6$
7	Point 25R	7.70	$\geq 2$
8	Point 25L	8.39	$\geq 2$
Any point in zone III		$< 0.67$	$\leq 0.7$
Any point in zone IV		$> 4$	$\geq 3$
Any point in zone I		$< 19.51$	$\leq 2 \times (50_{R})$

		Illumination Requirements (Unit: Lux)
Test Points on the Screen		Design Value	Standard Regulatory Value
1	$X = 0$ , $Y = 0$	38.74	$\geq 0.8 E_{\max}$
2	$- 1125 < X < + 1125$	$> 26$	$\geq 24$
3	$- 2250 < X < + 2250$	$> 19$	$\geq 6$
4	Any point	$E_{\max} = 49.02$	$240 lux \geq E_{\max} \geq 48 lux$

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Applied Optics