Sensors, Vol. 23, Pages 2592: Modeling of Rapid Pam Systems Based on Electrothermal Micromirror for High-Resolution Facial Angiography

Sensors, Vol. 23, Pages 2592: Modeling of Rapid Pam Systems Based on Electrothermal Micromirror for High-Resolution Facial Angiography Sensors doi: 10.3390/s23052592 Authors: Yuanlin Xia Yujie Wang Tianxiang Liang Zhen Peng Liang He Zhuqing Wang In this paper, a portable photoacoustic microscopy (PAM) system is proposed based on a large stroke electrothermal micromirror to achieve high resolution and fast imaging. The crucial micromirror in the system realizes a precise and efficient 2-axis control. Two different designs of electrothermal actuators with “O” and “Z” shape are evenly located around the four directions of mirror plate. With a symmetrical structure, the actuator realized single direction drive only. The finite element modelling of both two proposed micromirror has realized a large displacement over 550 μm and the scan angle over ±30.43° at 0–10 V DC excitation. In addition, the steady-state and transient-state response show a high linearity and quick response respectively, which can contribute to a fast and stable imaging. Using the Linescan model, the system achieves an effective imaging area of 1 mm × 3 mm in 14 s and 1 mm × 4 mm in 12 s for the “O” and “Z” types, respectively. The proposed PAM systems have advantages in image resolution and control accur...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research