Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Spectrophotometry: Introduction

Spectrophotometry: Introduction

Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...

Atomic Emission Spectroscopy: Instrumentation

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.

IR Spectrometers

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...

UV–Vis Spectrometers

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...

Atomic Absorption Spectroscopy: Instrumentation

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...

X-ray Imaging

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...

You might also read

Related Articles

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

Sort by

Same author

Feasibility of tracking mental health in cystic fibrosis registries: lessons from current practice.

Respiratory medicine·2026

Same author

Formation and evolution of carbonaceous asteroid Ryugu: Direct evidence from returned samples.

Science (New York, N.Y.)·2022

Same author

Seasonality and zoonotic foodborne pathogens in Canada: relationships between climate and Campylobacter, E. coli and Salmonella in meat products.

Epidemiology and infection·2019

Same author

How will climate change impact microbial foodborne disease in Canada?

Canada communicable disease report = Releve des maladies transmissibles au Canada·2019

Same author

The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes.

Science (New York, N.Y.)·2019

Same author

The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy.

Science (New York, N.Y.)·2019

Search research articles

Related Experiment Video

Updated: Jun 13, 2026

Bringing the Visible Universe into Focus with Robo-AO

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Coronagraph for astronomical imaging and spectrophotometry.

F Vilas, B A Smith

|May 11, 2010

Summary

This study introduces a novel coronagraph for astronomical observations, minimizing scattered light from Cassegrain telescope structures to produce high-quality images. The versatile instrument offers direct and reducing imaging, spectrograph capabilities, and portability.

Area of Science:

Astronomy and Astrophysics
Optical Instrumentation

Background:

Cassegrain telescopes are susceptible to scattered light from internal structures, degrading image quality.
Minimizing scattered light is crucial for sensitive astronomical observations and exoplanet detection.

Purpose of the Study:

To describe a novel coronagraph designed to mitigate scattered light in Cassegrain telescope systems.
To present an instrument capable of both direct and reducing astronomical imaging.
To highlight the coronagraph's adaptability for spectrographic analysis and portability.

Main Methods:

The coronagraph design specifically addresses light scattering from the primary mirror, secondary mirror, and support structures.
The instrument facilitates direct (1:1) and reducing (2.7:1) imaging modes.

More Related Videos

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

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

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

Published on: April 28, 2023

Related Experiment Videos

Last Updated: Jun 13, 2026

Bringing the Visible Universe into Focus with Robo-AO

Bringing the Visible Universe into Focus with Robo-AO

Published on: February 12, 2013

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

Published on: April 14, 2020

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

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

Published on: April 28, 2023

Integration with 2-D charge-coupled devices or photographic film cameras is supported.

Main Results:

The coronagraph effectively minimizes scattered light, leading to high-quality astronomical images.
The instrument provides versatile imaging capabilities for astronomical fields.
The coronagraph can be converted into a low-resolution spectrograph by adding dispersing optics.

Conclusions:

The developed coronagraph offers a significant advancement in reducing scattered light for Cassegrain telescopes.
Its modular and portable design enhances its utility across different astronomical observatories.
The instrument's adaptability for imaging and spectroscopy broadens its applications in astronomical research.