Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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. Samples for...
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...
Flame Photometry: Lab01:16

Flame Photometry: Lab

In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
UV–Vis Spectroscopy: Beer–Lambert Law01:09

UV–Vis Spectroscopy: Beer–Lambert Law

The Beer-Lambert law describes the relationship between absorbance and concentration, which combines the principles established by scientists Johann Heinrich Lambert and August Beer. Lambert's law states that when light passes through a medium, the loss in intensity is directly proportional to the original intensity and the path length of the light. Beer's law proposed that the transmittance of a solution remains constant if the product of concentration and path length is constant. The modern...
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...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Distribution of phyllosilicates on the surface of Ceres.

Science (New York, N.Y.)·2016
Same author

Dawn arrives at Ceres: Exploration of a small, volatile-rich world.

Science (New York, N.Y.)·2016
Same author

Ammoniated phyllosilicates with a likely outer Solar System origin on (1) Ceres.

Nature·2015
Same author

The diurnal cycle of water ice on comet 67P/Churyumov-Gerasimenko.

Nature·2015
Same author

Distinctive space weathering on Vesta from regolith mixing processes.

Nature·2012
Same author

Dark material on Vesta from the infall of carbonaceous volatile-rich material.

Nature·2012
Same journal

Multifunctional reconfigurable terahertz metasurface based on vanadium dioxide phase transition: achieving broadband absorption and efficient polarization conversion.

Applied optics·2026
Same journal

High-Q-factor electromagnetically induced transparency utilizing quasi-bound states in the continuum in an all-dielectric terahertz metasurface.

Applied optics·2026
Same journal

Automated stitching interferometry for high-precision metrology of X-ray mirrors.

Applied optics·2026
Same journal

Experimental demonstration of an approach to designing a metal-dielectric DBR resonant cavity structure.

Applied optics·2026
Same journal

High-precision wavefront reconstruction from a single-shot interferogram using a physics-driven hybrid feature calibration network.

Applied optics·2026
Same journal

Ultra-high-Q Fano resonance based on coupled topological corner states in Kagome photonic crystals.

Applied optics·2026
See all related articles

Related Experiment Video

Updated: Jun 17, 2026

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
10:13

A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

Published on: April 28, 2023

A double beam astronomical photometer.

T B McCord

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

    A novel double beam photoelectric filter photometer enables simultaneous astronomical object measurements, reducing atmospheric extinction errors. This instrument enhances photometric precision, achieving accuracies of a few tenths of a percent even under thin cloud conditions.

    More Related Videos

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
    12:14

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

    Published on: August 12, 2013

    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

    Related Experiment Videos

    Last Updated: Jun 17, 2026

    A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
    10:13

    A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

    Published on: April 28, 2023

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
    12:14

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

    Published on: August 12, 2013

    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

    Area of Science:

    • Astronomy
    • Astrophysics
    • Optical Instrumentation

    Background:

    • Atmospheric extinction significantly impacts astronomical photometry.
    • Simultaneous measurements are crucial for minimizing temporal variations.
    • Existing instruments may lack the precision required for certain observations.

    Purpose of the Study:

    • To design and construct a double beam photoelectric filter photometer.
    • To enable simultaneous photometric measurements of two astronomical objects.
    • To reduce errors caused by variable atmospheric extinction and improve measurement precision.

    Main Methods:

    • Utilizing a double beam design where both objects share the same focal plane.
    • Employing a common aperture-filter-detector system for both beams.
    • Implementing a photoelectric filter photometer for precise light detection.

    Main Results:

    • Simultaneous measurements of two astronomical objects were successfully achieved.
    • Significant reduction in errors due to variable atmospheric extinction was observed.
    • Measurement accuracies of a few tenths of one percent were routinely obtained under thin cloud conditions.

    Conclusions:

    • The developed double beam photoelectric filter photometer is effective in reducing atmospheric extinction errors.
    • The instrument allows for precise photometric measurements under challenging atmospheric conditions.
    • This technology enhances the capability for accurate astronomical observations.