Practical design for compact image scanner with large depth of field by compound eye system

Area of Science:

• Optics and Photonics
• Biomimetics and Bio-inspired Engineering
• Imaging Technology

Background:

• Traditional image scanners often face limitations in compactness and depth of field.
• Compound eye systems offer a unique biological model for advanced optical designs.
• Previous iterations of compound eye-inspired scanners required complex assembly and exhibited variable optical characteristics.

Purpose of the Study:

• To design and develop a novel, compact image scanner utilizing reflective optics inspired by a compound eye system.
• To improve upon previous designs by enhancing compactness, reducing optical variability, and simplifying assembly.
• To achieve a large depth of field (DOF) suitable for various imaging applications.

Main Methods:

• The image scanner was constructed using 32 reflective imaging cells, each capturing a small, overlapping field of view (FOV).
• Optical path folding within the imaging cells was studied and optimized to simplify the overall structure.
• Post-processing techniques were employed to reconstruct the total image from the individual cell images.

Main Results:

• The new image scanner achieved significant compactness, with a cross-section of 50 × 31 mm².
• Optical characteristics among the individual imaging cells demonstrated reduced variability.
• The simplified structure, with fewer optical components per cell, facilitated easier assembly.

Conclusions:

• The compound eye-inspired image scanner offers a compact and easily assembled solution with a large depth of field.
• The design advancements lead to more consistent optical performance across all imaging cells.
• This technology holds potential for various applications requiring high-performance, miniaturized imaging systems.