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Related Concept Videos

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...
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...
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...
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,...
IR Spectrum01:19

IR Spectrum

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% (complete...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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.

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Updated: Jun 16, 2026

Bringing the Visible Universe into Focus with Robo-AO
10:35

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Astronomical infrared telescopes.

W A Stein, N J Woolf

    Applied Optics
    |January 23, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Large infrared telescopes require excellent image quality for efficient observation. Future large instruments should prioritize high-resolution imaging to detect fainter cosmic sources and optimize scientific return on investment.

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    Area of Science:

    • Astronomy
    • Optical Engineering

    Background:

    • Current large infrared telescopes may compromise image quality for light-gathering capacity.
    • Advancements in infrared astronomy necessitate improved observational efficiency.

    Purpose of the Study:

    • To evaluate image quality requirements for large infrared telescopes.
    • To assess the potential gains in observing efficiency.
    • To determine optimal telescope size for cost-effectiveness.

    Main Methods:

    • Analysis of image quality requirements for large infrared instruments.
    • Consideration of engineering designs for high-resolution telescopes.
    • Economic evaluation of telescope size versus information gain.

    Main Results:

    • Large infrared telescopes must achieve high image quality (better than 2 arcseconds).
    • Poor image quality in large instruments is unacceptable for efficient observation.
    • Optimal telescope size for information gain per dollar is likely much larger than current 1.5-m telescopes.

    Conclusions:

    • Future large infrared telescope designs must incorporate high image quality specifications.
    • Improved image quality will enable the detection of fainter infrared sources, expanding astronomical discovery.
    • Significant investment in larger, high-performance instruments is warranted for advancing infrared astronomy.