AN INFRARED STROBE CCD TELEVISION CAMERA UNIT

生物力学实验室为临床医生和研究人员提供 关于人体运动的定量信息。的 实验室设有电脑操作的电视动作分析系统 （VICON）以获取和评估数据。系统检测是否存在 位于患者身上的反射标记，并计算三个 每个标记的空间位置。坚持的问题， 模糊，和电子稳定的摄像机，使 六个摄像头的平衡和校准很困难。此外，问题 当频闪红外（IR）灯 发光二极管（LED）阵列由另一台摄像机观察。 解决的办法是用CCD摄像机代替光导摄像机， 具有上级的电子稳定性，并且不显示图像拖尾 当检测到快速运动时。每个摄像头都有一个选通的红外阵列， 照亮视野。消除照明串扰 在摄像机之间，每个红外阵列都配备了红外发射器， 波长为880 nm或950 nm。红外带通滤波器， 阵列的波长被放置在照相机透镜上。

The Biomechanics Laboratory makes available to clinicians and researchers at the NIH quantitative information concerning human motion. The Laboratory has a computer-operated television motion analysis system (VICON) to acquire and evaluate data. The system detects the presence of reflective markers located on the patient and calculates the three dimensional location of each marker. The problems with persistence, blooming, and electronic stability of the vidicon cameras makes the balancing and calibration of the six cameras difficult. Also, problems with video overload are encountered when a strobed infrared (IR) Light Emitting Diode (LED) array is viewed by another camera. The solution is to replace the vidicon cameras with CCD cameras, which have superior electronic stability and do not display-picture smearing when detecting fast motion. Each camera has a strobed IR array to illuminate the field of view. To eliminate the illumination cross-talk between cameras, each IR array is equipped with IR emitters with wavelengths of either 880nm or 950nm. An IR band-pass filter that matches the wavelength of the array is placed over the camera lens.