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相关概念视频

Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
Different compounds display unique properties due to their...
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IR Spectrometers01:25

IR Spectrometers

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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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GIS Software, Hardware, and Sources of GIS Data

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A Geographic Information System (GIS) combines specialized software and hardware to effectively manage, analyze, and present spatial and related data. GIS software includes critical functionalities such as a user interface for easy navigation, database management tools for handling spatial and attribute data, and data retrieval features for efficient access. Analytical tools transform raw data into insights, while display functions produce maps and reports in various formats for effective...
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IR Spectrum01:19

IR Spectrum

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When infrared (IR) radiation passes through a molecule, the bonds stretch or bend by absorbing the radiation. This absorption creates the molecule's absorption spectrum, which is the plot of its percentage transmittance versus wavenumber.
Transmittance is defined as the ratio of the radiant power passing through a sample to that from the radiation's source. Multiplying the transmittance by 100 gives the percent transmittance (%T), which varies between 100% (no absorption) and 0%...
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Flame Photometry: Overview01:02

Flame Photometry: Overview

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Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
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相关实验视频

Updated: Jun 3, 2025

Applying Hyperspectral Reflectance Imaging to Investigate the Palettes and the Techniques of Painters
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Applying Hyperspectral Reflectance Imaging to Investigate the Palettes and the Techniques of Painters

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一个超光谱的开源成像仪 (HOSI).

Jolyon Troscianko1

  • 1Centre for Ecology & Conservation, University of Exeter, Penryn, UK. jt@jolyon.co.uk.

BMC biology
|January 8, 2025
PubMed
概括

一个新的高光谱开源成像仪 (HOSI) 为测量光环境提供了一个低成本的解决方案. 这种便携式设备对低光水平敏感,并捕获详细的光谱和空间数据,这对于了解夜间人工光 (ALAN) 影响至关重要.

科学领域:

  • 光学物理和远程传感.
  • 生态学和动物行为.
  • 环境科学环境科学

背景情况:

  • 光的空间和光谱属性对于动物的行为,生态和进化至关重要.
  • 量化光线在农业,心理物理学和材料科学等各个领域都很重要.
  • 夜间人工光 (ALAN) 给测量光污染对视觉的影响带来了挑战,需要敏感,广泛的测量.

研究的目的:

  • 开发一种创新,低成本,便携式的高光谱成像仪.
  • 为了满足在夜间测量人工光线 (ALAN) 的严格要求.
  • 为研究光污染及其生态影响提供一个工具.

主要方法:

  • 使用Hamamatsu C12880MA微光谱仪进行单点测量.
  • 集成了一个机动杆,用于精确的空间控制.
  • 采用现成的部件和3D打印以实现成本效益 (约. 350英) 的价格.

主要成果:

  • 开发了一种超光谱开源成像仪 (HOSI),能够进行全场超光谱数据收集.
  • 获得了对低光水平 (~0.001 cd.m-2) 的灵敏度,覆盖320-880 nm,光谱分辨率为~9 nm.
  • 捕获的全景超光谱图像具有高动态范围 (>50,000:1) 和空间分辨率 (~2周期/度).
关键词:
晚上的人工光.生态生态学 生态生态学环境光学物理环境光学物理超光谱成像技术的使用.轻的环境 轻的环境频谱成像技术的使用.频谱放射测量是一种光谱放射测量.

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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Excitation-Scanning Hyperspectral Imaging Microscopy to Efficiently Discriminate Fluorescence Signals
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Last Updated: Jun 3, 2025

Applying Hyperspectral Reflectance Imaging to Investigate the Palettes and the Techniques of Painters
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

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Excitation-Scanning Hyperspectral Imaging Microscopy to Efficiently Discriminate Fluorescence Signals
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结论:

  • 该HOSI系统是可适应的,具有成本效益和开源.
  • 它是研究光,环境,行为,生态和生物多样性的宝贵工具.
  • 潜在的应用范围延伸到其他各种科学和工业领域.