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- Title
Mask-Moving-Lithography-Based High-Precision Surface Fabrication Method for Microlens Arrays.
- Authors
Gong, Jianwen; Zhou, Ji; Liu, Junbo; Hu, Song; Wang, Jian; Sun, Haifeng
- Abstract
Microlens arrays, as typical micro-optical elements, effectively enhance the integration and performance of optical systems. The surface shape errors and surface roughness of microlens arrays are the main indicators of their optical characteristics and determine their optical performance. In this study, a mask-moving-projection-lithography-based high-precision surface fabrication method for microlens arrays is proposed, which effectively reduces the surface shape errors and surface roughness of microlens arrays. The pre-exposure technology is used to reduce the development threshold of the photoresist, thus eliminating the impact of the exposure threshold on the surface shape of the microlens. After development, the inverted air bath reflux method is used to bring the microlens array surface to a molten state, effectively eliminating surface protrusions. Experimental results show that the microlens arrays fabricated using this method had a root mean square error of less than 2.8%, and their surface roughness could reach the nanometer level, which effectively improves the fabrication precision for microlens arrays.
- Subjects
STANDARD deviations; SURFACE roughness; SURFACE states
- Publication
Micromachines, 2024, Vol 15, Issue 2, p289
- ISSN
2072-666X
- Publication type
Article
- DOI
10.3390/mi15020289