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介绍了一种直接检测生物体液的光纤光谱仪。根据光纤和毛细管的特性，作者设计了一种特殊的光纤探头，该探头可以直接插入生物体内，通过毛细管采集生物体液，并直接引入光路中，即样品不需进行任何预处理就可以直接测量。为了提高测量灵敏度，探头中的光纤采取分层排列以增加体液在光路中的路程，该探头可使测量过程简化并且实现在位监测。利用计算机的并行口输出脉冲以控制步进电机而带动色散棱镜转动，用光电倍增管接收其光谱信号，该信号供计算机进行实时采集并在荧光屏上实时显示待测生物体液的光谱特性。
A fiber spectrometer for direct detection of biological fluids was introduced. Based on the characteristics of the fiber and capillary, the author designed a special fiber optic probe that can be inserted directly into the body, collecting biological fluids through the capillary tube, and directly introduced into the light path, ie the sample can be directly measured without any pretreatment. In order to improve the measurement sensitivity, the optical fiber in the probe is arranged in layers to increase the distance of the body fluid in the optical path. The probe can simplify the measurement process and achieve on-site monitoring. The computer’s parallel port outputs pulses to control the stepper motor to drive the dispersive prism to rotate, and the photomultiplier tube receives the spectral signal. The signal is used by the computer to collect real-time data and displays the spectral characteristics of the biological fluid to be measured on the screen in real time.