The dynamic performance (stroke, resolution, speed, etc.) of the focusing mechanism of a microscopic imaging system is the key factor affecting the image quality and detection efficiency. The focusing speed and resolution of the microscopic imaging system depend on the ultra-precise motion of the focusing mechanism. In this study, magnetic shape memory alloy(MSMA) is used to develop a driver for rapid focusing of microscopic imaging system. The more accurate mathematical model is established to study nonlinear control method, improve the accuracy of magnetic shape memory alloy, The magnetic shape memory alloy driver can be applied to realize fast and high-precision focusing in microscopic imaging system, which provides a new idea for focusing device in microscopic imaging system.
Traditional computer tomography (CT) based on capacitive coupling cannot satisfy the high data rate transmission requirement. We design and experimentally demonstrate a free-space optical transmission system for CT equipment at a data rate of 10 Gb / s. Two interchangeable sections of 12 pieces of fiber with equal length is fabricated and tested by our designed laser phase distance measurement system. By locating the 12 collimators in the edge of the circle wheel evenly, the optical propagation characteristics for the 12 wired and wireless paths are similar, which can satisfy the requirement of high-speed CT transmission system. After bit error rate (BER) measurement in several conditions, the BER performances are below the value of 10 − 11, which has the potential in the future application scenario of CT equipment.
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