Development of a low cost high precision three-layer 3D artificial compound eye

Area of Science:

• Optics and Photonics
• Biomimetic Engineering
• Materials Science

Background:

• Traditional artificial compound eyes are limited to planar substrates due to manufacturing constraints.
• Mimicking natural apposition compound eyes requires advanced optical designs and fabrication methods for curved surfaces.

Purpose of the Study:

• To design and fabricate a high-precision, low-cost, three-layer 3D artificial compound eye on a curved substrate.
• To steer incident light beams and their respective images onto a flat image plane, overcoming substrate curvature limitations.

Main Methods:

• Utilized a three-layer structure: 3D microlens array, freeform lens array, and field lens array.
• Employed ZEMAX for optical design and simulation.
• Manufactured freeform and field lens arrays using microinjection molding with diamond-machined aluminum inserts.

Main Results:

• Optical simulations predicted multiple images with aberrations below 11 μm.
• Experimental testing confirmed successful image steering from a curved surface to a planar photoreceptor.
• Achieved a field of view of 87° with evenly distributed images and overlapping views for potential high-resolution reconstruction.

Conclusions:

• The developed 3D artificial compound eye effectively overcomes substrate curvature limitations for imaging.
• The low-cost manufacturing process and demonstrated performance make it suitable for various imaging applications.
• Overlapping views from multiple channels offer a pathway to reconstruct higher-resolution images.