Ray mapping method for off-axis and non-paraxial freeform illumination lens design

Desnijder, Karel; Hanselaer, Peter; Meuret, Youri

doi:10.1364/ol.44.000771

Cited by 62 publications

(18 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thereby, they provide better results than numerical optimization methods [38], especially if the systems are complex. A great variety of design methods are known, for example ray mapping [39][40][41][42][43][44][45][46], forming surfaces using Cartesian ovals [47], the simultaneous multiple surface method in 2D [48] and 3D [38,49] or the tailored freeform design method proposed by Ries and Muschaweck [50]. Nowadays ray mapping approach, i.e., the combination of energy mapping in conjunction with geometrical surface construction, is in the focus of illumination research [39][40][41][42][43][44][45][46].…”

Section: Optic Design Methodsmentioning

confidence: 99%

Monolitic Hybrid Transmitter-Receiver Lens for Rotary On-Axis Communications

et al. 2020

View full text Add to dashboard Cite

High-speed rotary communication links exhibit high complexity and require challenging assembly tolerances. This article investigates the use of optical wireless communications (OWC) for on-axis rotary communication scenarios. First, OWC is compared with other state-of-the-art technologies. Different realization approaches for bidirectional, full-duplex links are discussed. For the most promising approach, a monolithic hybrid transmitter-receiver lens is designed by ray mapping methodology. Ray tracing simulations are used to study the alignment-depended receiver power level and to determine the effect of optical crosstalk. Over a distance of 12.5 m m , the lens achieves an optical power level at the receiver of − 16.2 dBm to − 8.7 dBm even for misalignments up to 3 m m .

show abstract

Section: Optic Design Methodsmentioning

confidence: 99%

Monolitic Hybrid Transmitter-Receiver Lens for Rotary On-Axis Communications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The ray mapping method is generally an efficient and flexible approach to freeform illumination design. It's not being well addressed to find a mapping that satisfies the surface integrable condition until Karel Desnijder et al presented a new mapping scheme that alter an initial mapping via a sympletic flow of an equi-flux parametric coordinate system [4]. However, the integrable ray mapping method for multiple freeform surfaces design is still unsolved especially for the case that the entrance surface is changed.…”

Section: Establish a Curl-free Energy Equipartition Correspondencementioning

confidence: 99%

“…The vector O of exit rays can directly caculated from the target grid. According to Karel Desnijder's work [4], the integrability condition can be converted to:…”

Section: Determine the Entrance And Tir Surfaces Based On Genetic Algmentioning

confidence: 99%

“…Many basic approaches are developed for the design of freeform illumination optics based on an ideal source assumption such as ray mapping method [1,[3][4][5]15], supporting quadric method (SQM) [16,20,21] and Monge-Ampére equation (MA) [26]. However, the current researches mainly focus on on-axis illumination design with single surface [25].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-surface catadioptric freeform lens design for ultra-efficient off-axis road illumination

et al. 2019

View full text Add to dashboard Cite

We propose a novel design methodology to tackle the multi-surface catadioptric freeform lens design for off-axis road illumination applications based on an ideal source. The lens configuration contains an analytic refractive entrance surface, an analytic total internal reflective (TIR) surface and two freeform exit surfaces. A curl-free energy equipartition is established between the source and target plane and divided to implement the composite ray mapping mechanism. Furthermore, the analytic TIR surface and refractive entrance surface are optimized for the minimal Fresnel losses and surface error based on genetic algorithm (GA). The results show a significant improvement on illuminance uniformity and ultra-high transfer efficiency compared to our proposed result in [Zhu et al., Opt. Exp. 26, A54-A65 (2018)].

show abstract

“…Bösel et al directly solved the first order nonlinear PDE system related with the energy conservation and ray tracing equations 24 . Desnijder et al acquired an integrable ray map by modifying an initial ray map using a symplectic transformation 25 . Doskolovich and Bykov et al reduced the calculation of an integrable ray map to finding a solution to a linear assignment problem 26,27 .…”

Section: Introductionmentioning

confidence: 99%

Iterative freeform lens design for prescribed irradiance on curved target

Feng¹,

Cheng²,

Wang³

2020

Opto-Electronic Advances

View full text Add to dashboard Cite

Current freeform illumination optical designs are mostly focused on producing prescribed irradiance distributions on planar targets. Here, we aim to design freeform optics that could generate a desired illumination on a curved target from a point source, which is still a challenge. We reduce the difficulties that arise from the curved target by involving its varying z-coordinates in the iterative wavefront tailoring (IWT) procedure. The new IWT-based method is developed under the stereographic coordinate system with a special mesh transformation of the source domain, which is suitable for light sources with light emissions in semi space such as LED sources. The first example demonstrates that a rectangular flat-top illumination can be generated on an undulating surface by a spherical-freeform lens for a Lambertian source. The second example shows that our method is also applicable for producing a non-uniform irradiance distribution in a circular region of the undulating surface.

show abstract

Ray mapping method for off-axis and non-paraxial freeform illumination lens design

Cited by 62 publications

References 16 publications

Monolitic Hybrid Transmitter-Receiver Lens for Rotary On-Axis Communications

Monolitic Hybrid Transmitter-Receiver Lens for Rotary On-Axis Communications

Multi-surface catadioptric freeform lens design for ultra-efficient off-axis road illumination

Iterative freeform lens design for prescribed irradiance on curved target

Contact Info

Product

Resources

About