Prescribed irradiance distributions with freeform gradient-index optics

Area of Science:

• Optical Engineering
• Illumination Design
• Freeform Optics

Background:

• Illumination design often involves solving inverse problems to achieve specific light distributions.
• Existing methods for non-symmetric irradiance distributions primarily rely on freeform optical surfaces.

Purpose of the Study:

• To present a novel design method for prescribed irradiance distributions using gradient-index (GRIN) optics.
• To introduce the application of freeform gradient-index (F-GRIN) profiles in illumination design.

Main Methods:

• The study proposes a design method utilizing a piecewise-continuous F-GRIN profile.
• This method employs a single optic with two planar surfaces to shape light from a point source.

Main Results:

• Demonstrates the feasibility of using F-GRIN optics for generating prescribed far-field irradiance distributions.
• Presents two design examples showcasing the unique capabilities of F-GRIN illumination optics.

Conclusions:

• Gradient-index (GRIN) optics offer a new approach to solving inverse problems in illumination design.
• F-GRIN optics provide a versatile platform for creating complex and non-symmetric light patterns with simple optical elements.