A bench-scale facility was developed for the evaluation of thermal imaging cameras. Smoke obscuration conditions in the optical smoke cell were characterized by measuring laser light transmittance through the cell. Measurements showed that the laser transmittance along the axial direction of the optical smoke cell was relatively uniform in the upper and lower halves of the cell for various smoke obscuration conditions. The thermal sensitivity of thermal imagers was investigated using the Michelson Contrast as a performance metric for a bar target viewed through the smoke-filled cell for different background thermal conditions. The results of the study indicate that the optical smoke cell can be utilized as a well-controlled and effective bench-scale test apparatus to evaluate aspects of the performance of thermal imagers for fire service applications.

中文翻译：

---

用于评估消防应用中热成像仪性能的台式测试设施

开发了一种用于评估热像仪的实验室规模设施。光学烟雾池中的烟雾遮蔽条件通过测量通过池的激光透射率来表征。测量表明，在各种烟雾遮蔽条件下，沿光学烟室轴向的激光透射率在光室的上半部分和下半部分相对均匀。使用迈克尔逊对比度作为通过充满烟雾的单元查看不同背景热条件下的条形目标的性能指标来研究热成像仪的热灵敏度。