基于吸收的超谱热范围:性能分析,优化和模拟
Optics express
|January 4, 2024
概括
这项研究探讨了使用热排放的被动测距,利用大气吸收来测距离. 性能取决于大气条件,光谱分辨率和温度对比度.
科学领域:
- 大气光学是大气光学.
- 超光谱成像技术的使用.
- 被动感应是一种被动感应.
背景情况:
- 大气吸收随波长而变化,产生潜在的范围线索.
- 超光谱测量可以利用这些线索进行被动范围测量.
- 以前的方法通常依赖于主动照明或已知的物体属性.
研究的目的:
- 为了确定基于吸收的被动范围的基本极限.
- 分析大气条件和测量参数对距离性能的影响.
- 为设计先进的被动距离传感器提供见解.
主要方法:
- 开发了一个理论模型,已知空气温度和波长依赖衰减.
- 假设未知物体的温度和辐射率,不包括太阳/环境辐射.
- 采用费舍尔信息计算来评估性能限制.
主要成果:
- 距离性能基本上受到大气吸收的限制.
- 影响性能的关键因素包括空气温度,湿度,光谱分辨率和场景温度对比度.
- 更高的光谱分辨率和更高的温度对比度提高了范围的准确性.
结论:
- 基于吸收的被动范围可通过利用超光谱热辐射来实现.
- 了解大气和光谱因素的相互作用对于传感器设计至关重要.
- 这项研究为开发有效的被动测距系统提供了理论基础.
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