Compact freeform illumination design by deblurring the extended sources

TL;DR

This paper introduces a general method for designing ultra-efficient, compact freeform illumination optics for extended sources, overcoming limitations of traditional approaches and enabling precise control without far-field or Lambertian constraints.

Contribution

The paper presents a novel, general approach for freeform illumination design that handles extended sources without relying on far-field or Lambertian assumptions.

Findings

Designed freeform lenses achieve accurate illumination control

Method enables ultra-compact, lightweight optical structures

Demonstrated high efficiency and feasibility of the approach

Abstract

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 ultra-compact structures.