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

Coordinates setup.
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fig2: Coordinates setup.

Mentions: The distance between the LED source and the measuring screen is set as d = 25 meters. Total luminous flux is Q. The center intensity is I0 = Q/π. We select the center of the LED chip as the original point of Cartesian coordinates as shown in Figure 2. The emitting surface of the LED chip is set as XOY plane. z-axis is vertical to XOY plane and passes through the original point. Plane XOZ is horizontal. The plane paralleling to XOY plane and crossing the z-axis at point o is called measuring plane. The distance between point O and point o is 25 meters. Point o is the center of the measuring screen. The angle φ is the angle between the emitting rays and the positive z-axis. θ is the angle between x-axis and projection of emitting rays in the XOY plane. ω is the angle between the x-axis and the line that links any points in the measuring plane and point o.


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

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

Coordinates setup.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig2: Coordinates setup.
Mentions: The distance between the LED source and the measuring screen is set as d = 25 meters. Total luminous flux is Q. The center intensity is I0 = Q/π. We select the center of the LED chip as the original point of Cartesian coordinates as shown in Figure 2. The emitting surface of the LED chip is set as XOY plane. z-axis is vertical to XOY plane and passes through the original point. Plane XOZ is horizontal. The plane paralleling to XOY plane and crossing the z-axis at point o is called measuring plane. The distance between point O and point o is 25 meters. Point o is the center of the measuring screen. The angle φ is the angle between the emitting rays and the positive z-axis. θ is the angle between x-axis and projection of emitting rays in the XOY plane. ω is the angle between the x-axis and the line that links any points in the measuring plane and point o.

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