Micromachined water-immersible scanning mirror with torsional and bending hinges

Micromachined water-immersible scanning mirror with torsional and bending hinges
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带扭转和弯曲铰链的微机械水浸扫描镜

DOI:
10.1117/12.2608892
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发表时间:
2022
期刊:
Proceedings of SPIE
影响因子:
--
通讯作者:
Zou, Jun
Zou, Jun
中科院分区:
--
文献类型:
--
作者:
Li, Shuangliang;Duan, Xiaoyu;Zou, Jun

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本文报道了一种新型的双轴水浸微扫描镜(WIMSM),采用扭转和弯曲BoPET(双轴取向聚对苯二甲酸乙二醇酯)铰链。开发了一种基于微机械加工的制造工艺,以实现高的图案化分辨率和对准精度,并减少手动组装的量。通过扭转铰链,快轴在空气中的共振频率约为300 Hz,在水中约为200 Hz。采用弯曲铰链,慢轴在空气中的共振频率为60~70 Hz,在水中的共振频率为20~40 Hz。二维B扫描和三维体积超声显微镜演示通过使用混合铰链扫描镜。以DC或非常低的频率扫描慢轴的能力允许形成密集的光栅扫描图案,用于提高成像分辨率和视场。
This paper reports a new two-axis water-immersible micro scanning mirror (WIMSM) using torsional and bending BoPET (biaxially-oriented polyethylene terephthalate) hinges. A micromachining-based fabrication process is developed to enable high patterning resolution and alignment accuracy and to reduce the amount of manual assembly. With a torsional hinge, the fast axis has a resonance frequency of ~300 Hz in air and ~200 Hz in water. With a bending hinge, the slow axis has a resonance frequency of 60~70 Hz in air and 20~40 Hz in water. 2D B-scan and 3D volumetric ultrasound microscopy are demonstrated by using the hybrid-hinge scanning mirror. The ability of scanning the slow axis at DC or very low frequencies allows a dense raster scanning pattern to be formed for improving both the imaging resolution and field of view.
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