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Videos de Conceptos Relacionados

IR Spectrometers01:25

IR Spectrometers

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...
Applications of IR Spectroscopy: Overview01:11

Applications of IR Spectroscopy: Overview

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,...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
Interaction of EM Radiation with Matter: Spectroscopy01:12

Interaction of EM Radiation with Matter: Spectroscopy

Electromagnetic (EM) radiation can be considered an oscillating electric and magnetic field propagating through a medium that can interact with matter in its path. The electric field in the radiation can interact with electrical charges in the atoms or molecules in the matter. On the other hand, the magnetic field can interact with the magnetic field in the atomic nucleus. The study of the interaction between electromagnetic radiation and matter is termed spectroscopy. Spectroscopy is the study...
Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

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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Video Experimental Relacionado

Updated: Jul 12, 2026

Excitation-Scanning Hyperspectral Imaging Microscopy to Efficiently Discriminate Fluorescence Signals
07:34

Excitation-Scanning Hyperspectral Imaging Microscopy to Efficiently Discriminate Fluorescence Signals

Published on: August 22, 2019

Espectrometría de imágenes para la teledetección de la Tierra.

A F Goetz, G Vane, J E Solomon

    Science (New York, N.Y.)
    |June 7, 1985
    PubMed
    Resumen

    La espectrometría de imágenes permite la identificación directa de los materiales de la superficie de la Tierra desde aviones y naves espaciales. Esta avanzada técnica de teledetección proporciona espectros de laboratorio para el análisis detallado.

    Área de la Ciencia:

    • Ciencias de la Tierra Ciencias de la Tierra Ciencias de la Tierra
    • Tecnología de teledetección Tecnología de teledetección.
    • La espectroscopia es una técnica de espectroscopia.

    Sus antecedentes:

    • La espectrometría por imágenes es una nueva técnica de teledetección.
    • Ahora es técnicamente factible para aplicaciones aéreas y espaciales.
    • La teledetección actual a menudo se basa en enfoques estadísticos.

    Objetivo del estudio:

    • Para demostrar la capacidad de la espectrometría de imágenes para la teledetección.
    • Para resaltar el potencial para la identificación directa de materiales de superficie.
    • Introducir avances en el procesamiento de datos para esta técnica.

    Principales métodos:

    • Utilizando sensores aéreos y espaciales para adquirir datos.

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  • Características de absorción de muestreo dentro del espectro de reflectancia.
  • Empleando tecnología informática avanzada para la reducción y el almacenamiento de datos.

    • Principales resultados:

    • Se ha demostrado la identificación remota y directa de los materiales de la superficie sobre una base por elemento de imagen.
    • Los sensores adquieren imágenes en bandas espectrales contiguas de 100 a 200.
    • Logró datos espectrales similares a los de laboratorio de forma remota.

    Conclusiones:

    • La espectrometría de imágenes representa un avance significativo en la teledetección.
    • Se están desarrollando nuevas técnicas analíticas para conjuntos de datos masivos.
    • Se enfatiza un enfoque determinista para el análisis de datos, impulsando nuevas metodologías de procesamiento de imágenes digitales.