| 摘要 |
An imaging system may include an array of lenses, each of which is aligned over a respective one of a plurality of imaging pixels. The array of lenses may be formed in two layers. The first layer may include a first set of non-adjacent lenses and centering structures between the first lenses. The centering structures may be aligned with the first set of lenses as part of a mask design with a high level of accuracy. The second layer may include a second set of lenses, each of which is formed on a respective one of the centering structures. Forming the second set of lenses may include a reflow process in which surface tension forces center the second set of lenses on their respective centering structures, thereby aligning the second set of lenses with the first set of lenses with a high level of accuracy.
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