AN INFRARED STROBE CCD TELEVISION CAMERA UNIT

红外频闪CCD电视摄像机装置

• 批准号: 3874209
• 负责人: H E CASCIO
• 金额: --
• 依托单位: NATIONAL CENTER FOR RESEARCH RESOURCES
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/3874209
• 关键词: biomechanics; biomedical equipment development; biomedical equipment resource; chordate locomotion; image processing; infrared radiation; television; video recording system

The Biomechanics Laboratory makes available to clinicians and researchers at the NIH valuable quantitative information concerning human motion and the functional mechanisms which produce human motion. The Laboratory has a computer-operated television motion analysis system (VICON) to acquire and evaluate data associated with patient function. The video system detects the presence of reflective markers located on the patient and calculates the three-dimensional location of each marker by means of computer software. The problems associated with persistence, blooming, and electronic stability of the vidicon cameras make the balancing and calibration of the six cameras very difficult. Also, problems with video overload are encountered when a strobed infrared (IR) Light Emitting Diode (LED) array is viewed by another camera. This condition prevents the user from obtaining reliable data. 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. Six dual wavelength IR strobed camera units will be fabricated, using CCD cameras and the required video and strobe circuitry.

生物力学实验室为临床医生和研究人员提供 在美国国立卫生研究院有价值的定量信息， 产生人体运动的功能机制。 实验室有一个 计算机操作的电视运动分析系统（VICON），以获取和 评估与患者功能相关的数据。 视频系统检测到 位于患者身上的反射标记的存在，并计算 通过计算机对每个标记进行三维定位 软件 与持久性、开花和 光导摄像机的电子稳定性使得平衡和 六个摄像头的校准非常困难。 此外，视频的问题 当选通的红外（IR）发光二极管 (LED)阵列由另一个摄像机查看。 此条件可防止用户 获得可靠的数据。 解决办法是更换摄像管 具有上级电子稳定性， 检测快速运动时不显示图像拖尾。 每个摄像头都有一个 选通红外线阵列来照亮视野。 消除 照明摄像机之间的串扰，每个IR阵列配备有IR 发射器具有880nm或950nm的波长。 红外带通滤波器 与阵列的波长相匹配的透镜被放置在照相机透镜上。 将使用CCD制造六个双波长红外选通相机单元 摄像机和所需的视频和频闪电路。