Dynamic nano-imaging <i>via</i> a microsphere compound lens integrated microfluidic device with a 10× objective lens

Wu, Guangxing; Ng, Serene Wen Ling; Zhou, Yan; Hong, Minghui

doi:10.1039/d3lc00116d

Cited by 3 publications

(1 citation statement)

References 46 publications

(55 reference statements)

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“…Microlens arrays (MLAs) that consist of hundreds of microscale lenslets have been considered as a typical kind of optical element with a small size and high integration. To date, MLAs have found broad applications in optical imaging, − 3D display, , infrared guidance, and optical sensing. − In some advanced optical systems, MLAs usually play an essential role in achieving their advanced optical performance. Each microlens unit of an MLA operates independently and works as a whole, which enables light manipulation, optical phase modulation, resolution improvement, and aberration correction.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable Microlens Array Enables Tunable Imaging Based on Shape Memory Polymers

Sun,

Liu,

Wan

et al. 2024

ACS Appl. Mater. Interfaces

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Microlens arrays (MLAs) with a tunable imaging ability are core components of advanced micro-optical systems. Nevertheless, tunable MLAs generally suffer from high power consumption, an undeformable rigid body, large and complex systems, or limited focal length tunability. The combination of reconfigurable smart materials with MLAs may lead to distinct advantages including programmable deformation, remote manipulation, and multimodal tunability. However, unlike photopolymers that permit flexible structuring, the fabrication of tunable MLAs and compound eyes (CEs) based on transparent smart materials is still rare. In this work, we report reconfigurable MLAs that enable tunable imaging based on shape memory polymers (SMPs). The smart MLAs with closely packed 200 × 200 microlenses (40.0 μm in size) are fabricated via a combined technology that involves wet etching-assisted femtosecond laser direct writing of MLA templates on quartz, soft lithography for MLA duplication using SMPs, and the mechanical heat setting for programmable reconfiguration. By stretching or squeezing the shape memory MLAs at the transition temperature (80 °C), the size, profiles, and spatial distributions of the microlenses can be programmed. When the MLA is stretched from 0 to 120% (area ratio), the focal length is increased from 116 to 283 μm. As a proof of concept, reconfigurable MLAs and a 3D CE with a tunable field of view (FOV, 160–0°) have been demonstrated in which the thermally triggered shape memory deformation has been employed for tunable imaging. The reconfigurable MLAs and CEs with a tunable focal length and adjustable FOV may hold great promise for developing smart micro-optical systems.

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Section: Introductionmentioning

confidence: 99%

Reconfigurable Microlens Array Enables Tunable Imaging Based on Shape Memory Polymers

Sun,

Liu,

Wan

et al. 2024

ACS Appl. Mater. Interfaces

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Optical Microsphere Nano-Imaging: Progress and Challenges

Wu,

Hong

2024

Engineering

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Super-resolution imaging based on cascaded microsphere compound lenses

Wang,

Yang,

Chen

et al. 2023

Appl. Opt.

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In this paper, a cascaded microsphere compound lens (CMCL) is introduced, in which a 20-µm-diameter barium titanate glass (BTG) primary microsphere and a 250-nm-diameter or 200-nm-diameter polystyrene (PS) secondary microsphere array constitute CMCL1 and CMCL2, respectively. The field of view (FOV) depends on the size of the BTG microsphere, while the waist of the photon nanojet (PNJ) can be adjusted by the size of the PS microsphere. The narrower the waist of the PNJ, the higher the imaging resolution. In the experiment, a 200-nm-diameter hexagonally close-packed PS nanoparticle array is successfully observed by the CMCL with a high magnification of ∼11.6× and a FOV of ∼14µm, while the single BTG microsphere is incapable of observing the array. The point spread function is used to quantify the resolution of the CMCL. A well-designed CMCL can improve the imaging performances of a microsphere-assisted microscope.

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Dynamic nano-imaging via a microsphere compound lens integrated microfluidic device with a 10× objective lens

Abstract: Real-time super-resolution microfluidics imaging enabled by a microsphere compound lens integrated microfluidic device with a 10× objective lens.

Cited by 3 publications

References 46 publications

Reconfigurable Microlens Array Enables Tunable Imaging Based on Shape Memory Polymers

Reconfigurable Microlens Array Enables Tunable Imaging Based on Shape Memory Polymers

Optical Microsphere Nano-Imaging: Progress and Challenges

Super-resolution imaging based on cascaded microsphere compound lenses

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