Rapid fabrication of mini droplet lens array with tunable focal length

Bo Dai; Huansi Wang; Qiao Xu; Zhenqing Li; Chunxian Tao; Dawei Zhang

doi:doi:10.3788/COL201816.122201

Chinese Optics Letters, 2018, 16 (12): 122201, Published Online: Dec. 7, 2018

Rapid fabrication of mini droplet lens array with tunable focal length Download： 592次

Bo Dai Huansi Wang Qiao Xu Zhenqing Li Chunxian Tao Dawei Zhang ^*

Author Affiliations

Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China

Figures & Tables

Fig. 1. (a) Fabrication process of the droplet-filled convex lens array. (b) Photo of the fabricated lens array and the top-view microscopic image of the lens array.

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Fig. 2. Sinking process of the silicone oil droplet.

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Fig. 3. Sinking of the silicone oil droplet with a deviation from the center.

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Fig. 4. (a) Relation of the droplet volume and the diameter of the droplet at the bottom of the PDMS without the mold. The designed holes are slightly smaller than the diameter of the droplet. (b) Focal length of the lenses made of silicone oil droplets with different volumes.

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Fig. 5. (a) Focal length tuning of the lens array. Ray fan diagrams for analyzing the aberration of the lens made of a 6.5 μL droplet (b) without pressure and (c) with 16 N pressure. Blue, 486 nm; green, 588 nm; red, 656 nm.

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Fig. 6. (a) Imaging system for evaluating the imaging performance of the lens array. Inset: the customized lens mount. The image array of the letters (b) before and (c) after the tuning. The contrast of the image formed by a lens (d) before and (e) after the tuning.

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Bo Dai, Huansi Wang, Qiao Xu, Zhenqing Li, Chunxian Tao, Dawei Zhang. Rapid fabrication of mini droplet lens array with tunable focal length[J]. Chinese Optics Letters, 2018, 16(12): 122201.

Rapid fabrication of mini droplet lens array with tunable focal length Download： 592次

Fig. 1. (a) Fabrication process of the droplet-filled convex lens array. (b) Photo of the fabricated lens array and the top-view microscopic image of the lens array.

Fig. 2. Sinking process of the silicone oil droplet.

Fig. 3. Sinking of the silicone oil droplet with a deviation from the center.

Fig. 4. (a) Relation of the droplet volume and the diameter of the droplet at the bottom of the PDMS without the mold. The designed holes are slightly smaller than the diameter of the droplet. (b) Focal length of the lenses made of silicone oil droplets with different volumes.

Fig. 5. (a) Focal length tuning of the lens array. Ray fan diagrams for analyzing the aberration of the lens made of a 6.5 μL droplet (b) without pressure and (c) with 16 N pressure. Blue, 486 nm; green, 588 nm; red, 656 nm.

Fig. 6. (a) Imaging system for evaluating the imaging performance of the lens array. Inset: the customized lens mount. The image array of the letters (b) before and (c) after the tuning. The contrast of the image formed by a lens (d) before and (e) after the tuning.

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Rapid fabrication of mini droplet lens array with tunable focal length Download： 592次

Fig. 1. (a) Fabrication process of the droplet-filled convex lens array. (b) Photo of the fabricated lens array and the top-view microscopic image of the lens array.

Fig. 2. Sinking process of the silicone oil droplet.

Fig. 3. Sinking of the silicone oil droplet with a deviation from the center.

Fig. 4. (a) Relation of the droplet volume and the diameter of the droplet at the bottom of the PDMS without the mold. The designed holes are slightly smaller than the diameter of the droplet. (b) Focal length of the lenses made of silicone oil droplets with different volumes.

Fig. 5. (a) Focal length tuning of the lens array. Ray fan diagrams for analyzing the aberration of the lens made of a 6.5 μL droplet (b) without pressure and (c) with 16 N pressure. Blue, 486 nm; green, 588 nm; red, 656 nm.

Fig. 6. (a) Imaging system for evaluating the imaging performance of the lens array. Inset: the customized lens mount. The image array of the letters (b) before and (c) after the tuning. The contrast of the image formed by a lens (d) before and (e) after the tuning.

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