Compact illumination optic with three freeform surfaces for improved beam control

Sorgato, Simone; Mohedano, Rubén; Chaves, Julio; Hernández, Marta I.; Blen, José; Grabovičkić, Dejan; Benı́tez, Pablo; Miñano, Juan C.; Thienpont, Hugo; Duerr, Fabian

doi:10.1364/oe.25.029627

Cited by 30 publications

(9 citation statements)

References 13 publications

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“…We then have the degree of freedom of moving this projected image inside the target to tailor the illuminance pattern. The size, orientation and position of the projected images [through pinholes, see Figure a] inside the target are controlled by freeform wavefronts, which define the illuminance pattern . We may then consider that edge rays are those redirected from the edges of the source to the edges of the projected images.…”

Section: Algorithms For Extended Light Sourcesmentioning

confidence: 99%

Section: Algorithms For Extended Light Sourcesmentioning

confidence: 99%

“…The SMS method has been recently extended to coupling three wavefronts using three freeform surfaces, which allows a better control over the extended source. Figure a shows the example of such a so‐called RXI optic for an extended source, where the name follows the light path through refraction at the cavity, total internal reflection at the RI surface, reflection at the X mirror and refraction at the RI surface.…”

Section: Algorithms For Extended Light Sourcesmentioning

confidence: 99%

“…a) A pinhole P on an optic O P projects an "image" (I) 1 (I) 2 (I)3 (I)4 on target T of a source S with corners (S) 1 (S) 2 (S) 3 (S)4 . Reproduced with permission [122]. Copyright 2017, The Optical Society of America.…”

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confidence: 99%

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Design of Freeform Illumination Optics

Feng

Zheng

et al. 2018

Laser & Photonics Reviews

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116

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Freeform optics constitutes a new technology that is currently driving substantial changes in illumination design. It liberates designers and engineers from restrictions of optical surface geometry, enabling them to achieve compact, lightweight, and efficient illumination systems with excellent optical performance. Freeform optics is currently used widely for both fundamental research and practical applications. This Review focuses on the design of freeform illumination optics, which is a key factor in advancing the development of illumination engineering. The design methods of freeform illumination optics can be divided into two groups: zero‐étendue algorithms based on ideal source assumption and design algorithms for extended light sources. The zero‐étendue algorithms include ray mapping method, Monge–Ampère equation method, and supporting quadric method. The algorithms for extended sources include illumination optimization, feedback design, and simultaneous multiple surfaces method. The characteristics and limitations of these design methods are illustrated and a summary of these methods with future outlooks is also given.

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Section: Algorithms For Extended Light Sourcesmentioning

confidence: 99%

Section: Algorithms For Extended Light Sourcesmentioning

confidence: 99%

Section: Algorithms For Extended Light Sourcesmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Design of Freeform Illumination Optics

Feng

Zheng

et al. 2018

Laser & Photonics Reviews

Self Cite

116

View full text Add to dashboard Cite

show abstract

“…The most significant work in recent years is the so-called wavefront tailoring method (WTM) [32] for solving freeform surfaces delivering a prescribed far-field irradiance distribution. The method transforms the design problem into the wavefronts coupling problem [32,33] and solve the optics based on the SMS3D method [34]. The WTM provides physical insights in the field of illumination design by revealing the correspondence of wavefront propagation and the spatial energy distribution of extended sources.…”

Section: Introductionmentioning

confidence: 99%

Compact freeform illumination optics design by deblurring the response of extended sources

Wei

Zhu

et al. 2021

Opt. Lett.

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Illumination is the deliberate utilization of light to realize practical or aesthetic effects. The designers combine with the environmental considerations, energy-saving goals, and technology advances with fundamental physics to develop lighting solutions to satisfy all of our ever-changing needs. Achieving highly efficient and precise control of the energy output of light sources while maintaining compact optical structures is the ultimate goal of illumination design. To realize miniaturized and lightweight luminaires, the design process must consider the extents of light sources. However, the illumination design for extended sources is still a challenging and unsolved problem. Here, we propose a method to design ultra-performance illumination optics enabled by freeform optical surfaces. The proposed method is very general with no limitations of far-field approximation and Lambertian luminescent property. We demonstrate the feasibility and efficiency of the proposed method by designing several freeform lenses realizing accurate and highly efficient illumination control as well as ultracompact structures.

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Towards Automatic Design of Reflective Optical Systems

Liu

Zhu

2023

Advanced Photonics Research

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Traditional optical design processes can only obtain a few design solutions after a time‐consuming trial‐and‐error process. During this process, how to select the numbers and sequence of surfaces of different types (spherical, aspherical, and freeform) required by the system remains a difficult problem. Currently, no automatic design method is available for reflective optical systems that contain multiple surface types. Therefore, an automatic design framework for reflective systems is proposed that can output a series of design results with various combinations of surface types automatically after input specifications and constraints. In the first design example, 76 design results with imaging qualities near the diffraction limit are obtained that have 11 different surface type combinations. This framework realizes the automatic design of this type of system, paving the way toward general automatic optical design and significantly improving the efficiency of the optical design process. Using this framework, the numbers and sequence of the surfaces of different types required by the optical system can be determined reasonably, solving a difficult problem that has long puzzled designers. The proposed framework reduces the requirement for design experience and allows more people to participate in optical design processes.

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Compact illumination optic with three freeform surfaces for improved beam control

Cited by 30 publications

References 13 publications

Design of Freeform Illumination Optics

Design of Freeform Illumination Optics

Compact freeform illumination optics design by deblurring the response of extended sources

Towards Automatic Design of Reflective Optical Systems

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