Limits...
Reflective optics design for an LED high beam headlamp of motorbikes.

Ge P, Wang X, Li Y, Wang H - ScientificWorldJournal (2015)

Bottom Line: We set the measuring screen as an elliptical zone and divide it into many small lattices and divide the spatial angle of the LED source into many parts and make relationships between them.According to the conservation law of energy and the Snell's law, the reflector is generated by freeform optics design method.Experiment results can fully comply with United Nations Economic Commission for Europe (ECE) vehicle regulations R113 revision 2 (Class C).

View Article: PubMed Central - PubMed

Affiliation: Engineering Research Center for Optoelectronics of Guangdong Province, School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China.

ABSTRACT
We propose a reflective optics design for an LED motorbike high beam lamp. We set the measuring screen as an elliptical zone and divide it into many small lattices and divide the spatial angle of the LED source into many parts and make relationships between them. According to the conservation law of energy and the Snell's law, the reflector is generated by freeform optics design method. Then the optical system is simulated by Monte Carlo method using ASAP software. Light pattern of simulation could meet the standard. The high beam headlamp is finally fabricated and assembled into a physical object. Experiment results can fully comply with United Nations Economic Commission for Europe (ECE) vehicle regulations R113 revision 2 (Class C).

No MeSH data available.


Related in: MedlinePlus

Division of the measuring zones.
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fig3: Division of the measuring zones.

Mentions: Then we set the measuring zones as an ellipse. The semimajor axis is a, and the semiminor axis is b. We discrete the coordinates of the measuring screen. The semimajor axis and the semiminor axis are divided into n parts. ai and bi represent the ith part of the division, in which 0 < i ≤ n. We draw the ellipse with the center of the illumination plane as the ellipse center, ai, bi as the semimajor axis and the semiminor axis. In this way, the illumination plane is divided into n elliptical ribbons. Then the ω (0 ≤ ω ≤ 360°) is divided into m segments, and ωj represents the jth part of the division of ω. In the measuring screen, the rays that originate from the o and form an angle of ωj with x-axis divide every elliptical ribbon into m segments, as shown in Figure 3. So the illumination plane is divided into m × n small lattices.


Reflective optics design for an LED high beam headlamp of motorbikes.

Ge P, Wang X, Li Y, Wang H - ScientificWorldJournal (2015)

Division of the measuring zones.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4414011&req=5

fig3: Division of the measuring zones.
Mentions: Then we set the measuring zones as an ellipse. The semimajor axis is a, and the semiminor axis is b. We discrete the coordinates of the measuring screen. The semimajor axis and the semiminor axis are divided into n parts. ai and bi represent the ith part of the division, in which 0 < i ≤ n. We draw the ellipse with the center of the illumination plane as the ellipse center, ai, bi as the semimajor axis and the semiminor axis. In this way, the illumination plane is divided into n elliptical ribbons. Then the ω (0 ≤ ω ≤ 360°) is divided into m segments, and ωj represents the jth part of the division of ω. In the measuring screen, the rays that originate from the o and form an angle of ωj with x-axis divide every elliptical ribbon into m segments, as shown in Figure 3. So the illumination plane is divided into m × n small lattices.

Bottom Line: We set the measuring screen as an elliptical zone and divide it into many small lattices and divide the spatial angle of the LED source into many parts and make relationships between them.According to the conservation law of energy and the Snell's law, the reflector is generated by freeform optics design method.Experiment results can fully comply with United Nations Economic Commission for Europe (ECE) vehicle regulations R113 revision 2 (Class C).

View Article: PubMed Central - PubMed

Affiliation: Engineering Research Center for Optoelectronics of Guangdong Province, School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China.

ABSTRACT
We propose a reflective optics design for an LED motorbike high beam lamp. We set the measuring screen as an elliptical zone and divide it into many small lattices and divide the spatial angle of the LED source into many parts and make relationships between them. According to the conservation law of energy and the Snell's law, the reflector is generated by freeform optics design method. Then the optical system is simulated by Monte Carlo method using ASAP software. Light pattern of simulation could meet the standard. The high beam headlamp is finally fabricated and assembled into a physical object. Experiment results can fully comply with United Nations Economic Commission for Europe (ECE) vehicle regulations R113 revision 2 (Class C).

No MeSH data available.


Related in: MedlinePlus