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Related Concept Videos

Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
Flame Photometry: Overview01:02

Flame Photometry: Overview

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...
Gas Chromatography: Types of Detectors-I01:21

Gas Chromatography: Types of Detectors-I

There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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...

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High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
09:01

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Published on: April 16, 2017

Thermal imaging using pyroelectric detectors.

R W Astheimer, F Schwarz

    Applied Optics
    |January 14, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A novel pyroelectric detector, a new type of radiation detector, offers advanced thermal imaging capabilities without requiring cooling or biasing voltage. This technology enables high-performance thermography for applications like nondestructive testing.

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    Area of Science:

    • Physics
    • Materials Science
    • Engineering

    Background:

    • Pyroelectric detectors leverage the temperature sensitivity of electrostatic polarization for radiation detection.
    • They function as capacitors, generating charge upon thermal irradiation, making them suitable for thermal imaging.
    • Key advantages include no need for cooling or biasing voltage.

    Purpose of the Study:

    • To introduce a new pyroelectric detector for thermal imaging.
    • To develop a novel thermal imaging device (thermograph) utilizing pyroelectric properties.
    • To demonstrate the detector's utility in nondestructive testing.

    Main Methods:

    • Development of a scanning radiometer employing a pyroelectric detector.
    • The device scans a 10x10 degree field in 30 seconds, achieving 10,000 picture elements.
    • Utilizes a 7.6-cm diameter germanium objective lens.

    Main Results:

    • The pyroelectric detector exhibits a noise equivalent temperature of 0.1 degrees C.
    • Signal-to-noise ratio improves at higher frequencies, suppressing 1/f amplifier noise.
    • Thermal images are presented in black-and-white or color.

    Conclusions:

    • The developed pyroelectric detector and thermograph offer a promising solution for thermal imaging.
    • Its performance characteristics are well-suited for various applications, including nondestructive testing.
    • The technology presents an attractive alternative to existing thermal imaging systems.