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Open AccessArticle

Pneumatically Actuated Thin Glass Microlens for On-Chip Multi-Magnification Observations

by 1,2, 1,3,* and 1,2,*
1
Laboratory for Integrated Biodevice Unit, Center for Biosystems Dynamics Research (BDR), RIKEN, Osaka 565-0871, Japan
2
Graduate School of Frontier Biosciences, Osaka University, Osaka 565-0871, Japan
3
Graduate School of Nara Institute of Science and Technology, Nara 630-0192, Japan
*
Authors to whom correspondence should be addressed.
Actuators 2020, 9(3), 73; https://doi.org/10.3390/act9030073
Received: 22 June 2020 / Revised: 3 August 2020 / Accepted: 21 August 2020 / Published: 23 August 2020
(This article belongs to the Special Issue Microfluidics Actuators)
This paper presents a self-contained micro-optical system that is magnification-controlled by adjusting the positions of the microlens in the device via pneumatic air pressure. Unlike conventional dynamic microlenses made from a liquid or polydimethylsiloxane (PDMS) that change their shapes via external actuation, this system combines a fixed-curvature glass microlens, an inflatable PDMS layer, and the external pneumatic air pressure supply as an actuator. This device showed several advantages, including stable inflation, firm structure, and light weight; it achieved a larger displacement using the glass microlens structure than has been reported before. This fixed-curvature microlens was made from 120 µm-thick flat thin glass slides, and the system magnification was manipulated by the deflection of a 100 µm-thick PDMS layer to alter the distance from the microlens to the microfluidic channel. The system magnification power was proportional to the air pressure applied to the device, and with a 2.5 mbar air pressure supply, a 2.2X magnification was achieved. This optical system is ideal for combining with high resolving power microscopy for various short working distance observation tasks, and it is especially beneficial for various chip-based analyses. View Full-Text
Keywords: multi-magnification; thin glass microlens; pneumatic actuation; microfluidic multi-magnification; thin glass microlens; pneumatic actuation; microfluidic
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MDPI and ACS Style

Aishan, Y.; Yalikun, Y.; Tanaka, Y. Pneumatically Actuated Thin Glass Microlens for On-Chip Multi-Magnification Observations. Actuators 2020, 9, 73. https://doi.org/10.3390/act9030073

AMA Style

Aishan Y, Yalikun Y, Tanaka Y. Pneumatically Actuated Thin Glass Microlens for On-Chip Multi-Magnification Observations. Actuators. 2020; 9(3):73. https://doi.org/10.3390/act9030073

Chicago/Turabian Style

Aishan, Yusufu; Yalikun, Yaxiaer; Tanaka, Yo. 2020. "Pneumatically Actuated Thin Glass Microlens for On-Chip Multi-Magnification Observations" Actuators 9, no. 3: 73. https://doi.org/10.3390/act9030073

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