基于高能量传输效率的高信号噪声比的成像光谱仪的开发,用于土壤有机物质检测
Jize Fan1,2, Yuwei Wang1, Guochao Gu1
1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Sensors (Basel, Switzerland)
|July 13, 2024
概括
这项研究开发了一种用于农业遥感的高信号噪声比 (SNR) 成像光谱仪. 该仪器使用了一种新型凸格子和CMOS探测器,实现了土壤有机物检测的卓越性能.
科学领域:
- 遥感 遥感 遥感 遥感
- 频谱学是一种光谱学.
- 光学工程是指光学工程.
背景情况:
- 在农业中准确检测土壤有机物 (SOM) 变化速率需要高信号噪声比 (SNR) 的超谱数据.
- 现有的组件限制阻碍了当前遥感仪器中SNR的改进.
- 开发先进的成像光谱仪对于提高农业监测能力至关重要.
研究的目的:
- 设计和开发一种新的成像光谱仪,优化用于农业遥感中检测土壤有机物 (SOM) 变化速率.
- 为了实现高信号噪声比 (SNR),超过当前轨道仪器.
- 提供可行的技术解决方案,用于观测具有高SNR的微弱目标.
主要方法:
- 使用高效凸格子 (360-850nm的衍射效率>50%) 和背照的CMOS探测器 (峰值效率95%).
- 采用了Offner光谱仪设计,具有常见的球形镜子,用于快速对齐和减少组件数量.
- 进行了理论分析,散光抑制模拟,以及与格表面特征相结合的耐受性分析.
主要成果:
- 开发的成像光谱仪在360-850nm范围内达到10nm的光谱分辨率.
- 实验室测试证实SNR在波段中超过300,在550nm达到800nm.
- 该仪器在尼奎斯特频率上显示了一个调制转移函数 (MTF) 大于0.23.
结论:
- 新型成像光谱仪在SNR中提供了显著的改进,用于遥感土壤有机物质.
- 该系统的高能传输效率和光谱分辨率使其适合观察SOM变化速率.
- 这项技术为农业应用中微妙目标的高SNR遥感提供了可行的解决方案.
更多相关视频
12:03Two-Dimensional Visualization and Quantification of Labile, Inorganic Plant Nutrients and Contaminants in Soil
Published on: September 1, 2020
6.1K
09:38Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
8.6K
相关概念视频
UV–Vis Spectrometers
1.3K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
1.3K
Atomic Emission Spectroscopy: Overview
2.0K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
2.0K
Applications of IR Spectroscopy: Overview
543
The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
543
Spectrophotometry: Introduction
3.0K
Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
3.0K
Atomic Emission Spectroscopy: Instrumentation
359
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers. Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
359
