Design of TIR optics generating the prescribed irradiance distribution in the circle region

Moiseev, Mikhail A.; Doskolovich, Leonid L.

doi:10.1364/josaa.29.001758

Cited by 34 publications

(14 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…where ( ) l ϕ is the distance between BC and EF surfaces along the ray refracted on the first one, Microlens profile can be computed by integration of the following explicit first-order differential equations solved for derivatives 13 :…”

Section: Analysis Of Regulationsmentioning

confidence: 99%

Design method for automotive high-beam LED optics

et al. 2015

Self Cite

View full text Add to dashboard Cite

New analytical method for the calculation of the LED secondary optics for automotive high-beam lamps is presented. Automotive headlamps should illuminate the road and the curb at the distance of 100-150 meters and create a bright, flat, relatively powerful light beam. To generate intensity distribution of this kind we propose to use TIR optical element (collimator working on the total internal reflection principle) with array of microlenses (optical corrector) on the upper surface. TIR part of the optical element enables reflection of the side rays to the front direction and provides a collimated beam which incidents on the microrelief. Microrelief, in its turn, dissipates the light flux in horizontal direction to meet the requirements of the Regulations 112, 113 and to provide well-illuminated area across the road in the far field. As an example, we computed and simulated the optical element with the diameter of 33 millimeters and the height of 22 millimeters. Simulation data shows that three illuminating modules including Cree XP-G2 LED and lens allow generating an appropriate intensity distribution for the class D of UNECE Regulations.

show abstract

Section: Analysis Of Regulationsmentioning

confidence: 99%

Design method for automotive high-beam LED optics

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The equi-flux map and the free-form surface construction method in this paper is widely applied in LED illumination optics design [8]. On the other hand, the optical device designed under the principle of total internal reflection (TIR) is often used in illumination circumstance [9] and especially in collimating light omitted by LED [10]. The TIR collimator usually consists of two parts: a refractive free-form surface directly refracting and reflecting the LED's emitting light to parallel light, a reflective free-form surface which always accompanied with a refractive surface reflect the light to parallel using the TIR principle.…”

Section: Introductionmentioning

confidence: 99%

Freeform lens design for providing LED small angle illumination in underwater application

Zhang

Chen

2015

SPIE Proceedings

View full text Add to dashboard Cite

With high light efficiency and long aging life, LED solid-state light source has attracted much attention in underwater application, such as optical communication and imaging. But, the large divergence angle of LED illumination has been a big challenge in practical underwater application, such as the light attenuation in water and then the decreased signal-tonoise ratio. Source-target map is a vital method in illumination optics design, and the focus is to solve numerically differential equations and then construct the freeform surface. To achieve high accuracy freeform surface, an improved method is suggested and optimized through much more advanced and accuracy Runge-Kutta method, which is different from the original design one through Euler method. The designed lens is simulated by ray trace software TracePro, and the simulation results show that the uniformity of 0.8 and the efficacy of 0.6 is obtained. While as, the method is proven to be effective, and also the accuracy of the smooth freeform surface is strengthened. One designed illumination lens is fabricated by computer numeric control (CNC) machine to demonstrate the design experimentally.

show abstract

“…The tailored method can design a freeform lens to achieve any prescribed irradiance distribution, but it is difficult to make the optical surfaces smooth and continuous especially in a system without any symmetric feature [7,8]. In contrast, the EOPL method can easily design the lens with the smooth and continuous surfaces, but it is hard to get a specified irradiance distribution [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Virtual source simultaneous dual-surface method for uniform illumination

Zhang

et al. 2015

J. Opt. Soc. Am. A

View full text Add to dashboard Cite

We present a new simultaneous dual-surface design method for uniform illumination by introducing a virtual light source. This method is a combination of the equal optical path length condition and the tailored method. It can be applied to an extended light source after some optimization processes with a negative feedback algorithm. A solid lens to yield a circular uniform irradiance distribution is designed by using our method. Both optical simulation and experiment have been carried out to show that the experimental irradiance map is close to both the simulation result and the desired distribution, and the uniformity is higher than 0.9 while the light source is a 5050 LED chip with SMD package. The rays from the outside lens surface are of good topological invariance, which can give the potential to design more than two smooth freeform optical surfaces simultaneously by introducing multiple virtual point sources.

show abstract

Design of TIR optics generating the prescribed irradiance distribution in the circle region

Cited by 34 publications

References 8 publications

Design method for automotive high-beam LED optics

Design method for automotive high-beam LED optics

Freeform lens design for providing LED small angle illumination in underwater application

Virtual source simultaneous dual-surface method for uniform illumination

Contact Info

Product

Resources

About