Journal
MICROMACHINES
Volume 12, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/mi12030331
Keywords
curved compound eye; ommatidium; multiple focal lengths; high resolution
Categories
Funding
- National Natural Science Foundation of China [61727813]
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This study proposed the design of a nonuniform curved compound eye with multiple focal lengths to solve defocus issue, and a two-step gas-assisted process for fabricating high-resolution ommatidia. The results demonstrated that the high-resolution and small-volume single-lens curved compound eye imaging system has significant advantages in large-field imaging and rapid recognition.
Compared with a traditional optical system, the single-lens curved compound eye imaging system has superior optical performance, such as a large field of view (FOV), small size, and high portability. However, defocus and low resolution hinder the further development of single-lens curved compound eye imaging systems. In this study, the design of a nonuniform curved compound eye with multiple focal lengths was used to solve the defocus problem. A two-step gas-assisted process, which was combined with photolithography, soft photolithography, and ultraviolet curing, was proposed for fabricating the ommatidia with a large numerical aperture precisely. Ommatidia with high resolution were fabricated and arranged in five rings. Based on the imaging experimental results, it was demonstrated that the high-resolution and small-volume single-lens curved compound eye imaging system has significant advantages in large-field imaging and rapid recognition.
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