A straightforward,cost-effective scheme for fabricating multi-focus droplet lens arrays is proposed.Mini lenses can be rapidly produced by dripping liquid-state polydimethylsiloxane droplets on the square glass substr...A straightforward,cost-effective scheme for fabricating multi-focus droplet lens arrays is proposed.Mini lenses can be rapidly produced by dripping liquid-state polydimethylsiloxane droplets on the square glass substrate.The focal length of the lenses can be precisely controlled by adjusting the mass of the droplet.A group of prepared mini lenses can be flexibly assembled in a three-dimensional printed mount.The lenses are tightly packed together,ensuring a high filling factor of the lens array.The lens array consisting of the mini lenses with a proper combination of focal length can capture images of interests at different depth.展开更多
A rigid conformal （RC） lap can smooth mid-spatial-frequency （MSF） errors, which are naturally smaller than the tool size, while still removing large-scale errors in a short time. However, the RC-lap smoothing effi...A rigid conformal （RC） lap can smooth mid-spatial-frequency （MSF） errors, which are naturally smaller than the tool size, while still removing large-scale errors in a short time. However, the RC-lap smoothing efficiency performance is poorer than expected, and existing smoothing models cannot explicitly specify the methods to improve this efficiency. We presented an explicit time-dependent smoothing evaluation model that contained specific smoothing parameters directly derived from the parametric smoothing model and the Preston equation. Based on the time-dependent model, we proposed a strategy to improve the RC-lap smoothing efficiency, which incorporated the theoretical model, tool optimization, and efficiency limit determination. Two sets of smoothing experiments were performed to demonstrate the smoothing efficiency achieved using the time-dependent smoothing model. A high, theory-like tool influence function and a limiting toolspeed of 300 RPM were obtained.展开更多
基金supported by the National Natural Science Foundation of China(No.61775140)the Shanghai RisingStar Program(No.20QA1407000)the Shanghai Science and Technology Commission(No.18142200800)。
文摘A straightforward,cost-effective scheme for fabricating multi-focus droplet lens arrays is proposed.Mini lenses can be rapidly produced by dripping liquid-state polydimethylsiloxane droplets on the square glass substrate.The focal length of the lenses can be precisely controlled by adjusting the mass of the droplet.A group of prepared mini lenses can be flexibly assembled in a three-dimensional printed mount.The lenses are tightly packed together,ensuring a high filling factor of the lens array.The lens array consisting of the mini lenses with a proper combination of focal length can capture images of interests at different depth.
基金This research is financially supported by the National Natural Science of China （NSFC） （61210015） and Youth Foundation of National Natural Science Foundation （61605202）.
文摘A rigid conformal （RC） lap can smooth mid-spatial-frequency （MSF） errors, which are naturally smaller than the tool size, while still removing large-scale errors in a short time. However, the RC-lap smoothing efficiency performance is poorer than expected, and existing smoothing models cannot explicitly specify the methods to improve this efficiency. We presented an explicit time-dependent smoothing evaluation model that contained specific smoothing parameters directly derived from the parametric smoothing model and the Preston equation. Based on the time-dependent model, we proposed a strategy to improve the RC-lap smoothing efficiency, which incorporated the theoretical model, tool optimization, and efficiency limit determination. Two sets of smoothing experiments were performed to demonstrate the smoothing efficiency achieved using the time-dependent smoothing model. A high, theory-like tool influence function and a limiting toolspeed of 300 RPM were obtained.
