摘要: We fabricate two kinds of 100% fill factor compound eye structures using
direct laser writing, including conventional compound eyes (CVCEs) with the
same focal length of each microlens unit, and specially designed confocal
compound eyes (CFCEs). For CFCEs, the focal length of each microlens unit is
determined by its position and is equal to the distance between the microlens
unit and the image sensor. In this letter, the optical properties of CVCEs and
CFCEs are tested and compared. It is found that compared with CVCEs, CFCEs can
improve the focusing efficiency by about 7%, enlarge the imaging area by about
25%, and have better imaging quality at the edge of the field of view.
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