Abstract
A planar flow cytometric microimaging system is introduced for cell recognition and classification in urinary sediment analysis. In order to make clear imaging of the motor cells, the dynamic modulation transfer function(DMTF) is analyzed. At the Nyquist frequency, the DMTF of the imaging system must be more than 0.9 to achieve the imaging quality of static system. Based on this, the exposure time requirement of the system is derived. The system adopts LED optical pulse acceleration circuit and rising edge exposure. In this way, 1μs exposure time can be reached. The dynamic transmission is also up to 0.93, and the image clarity is improved significantly.
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