Compact Laser Source Detects Pollution

A middle infrared light source can detect greenhouse and other gases as well as molecules in a person’s breath. The compact system, which resembles a tiny suitcase, contains just two parts: a standard...

Method Measures Temperature Within 3D Objects

Engineers have remotely determined the temperature beneath the surface of certain materials using a new technique called depth thermography. The method may be useful in applications where...

Rapid Agent Aerosol Detector for Biological Agents

Any space, enclosed or open, can be vulnerable to the dispersal of harmful airborne biological agents. Silent and near-invisible, these bioagents can sicken or kill living things before...

Visualizing Value at the Speed of Light

See how hyperspectral imaging adds value to food inspection systems.

NEID Spectrometer Lights Up Path to Exoplanet Exploration

NASA's NEID tool delivered its first batch of data on the nearest and best-studied star, our Sun.

Spectroscopy Using an Optical Microscope

With an optical microscope, spectra can be acquired from a sample area smaller than a micron.

Monolithic Optical Parametric Oscillator for Laser Spectrometer

Applications include remote sensing, laser spectroscopy, and gas analysis.

Hyperspectral Cameras and Data Quality

Any hyperspectral system needs to maintain a stable and accurate radiometric and spectral calibration.

Compact Infrared Spectrometer

This device fits on a computer chip but can analyze infrared light in the same way as a conventional spectrometer.

Cavity-Enhanced Absorption Spectroscopy (CEAS) for Ozone Detection

This simple and inexpensive design achieves high-quality ozone measurements.

Lenslet-Based Integral Field Spectrograph

Applications include biomedical imaging, remote sensing, and heliophysics research.

Possible Significant Response Speedup from Detuning a Resonator Bolometer

The response time of kinetic inductance bolometers can be greatly enhanced by electrothermal feedback for devices that are both sensitive and speedy.

Detailed Spectrometry Makes Dangerous-Materials Testing Safer

Technology used to search for extraterrestrial life can characterize radioactive material.

Detecting Chemical Weapons Using Fourier Transform Infrared Spectroscopy

The AIRGARD® air analyzer has been deployed to protect multiple critical infrastructure locations.

Radiometric Temperature Measurement Using a DLP-Based Pyrometer

Researchers at NASA’s Armstrong Flight Research Center have identified and evaluated recently available miniature spectrometers that enable compact and robust pyrometry...

Control of the Diameter and Chiral Angle Distributions During Production of Single-Wall Carbon Nanotubes

Pulsed laser vaporization (PLV) production of single-wall carbon nanotubes (SWNTs) on traditional Co/Ni catalyst was explored with...

Wide-Area Chemical Sensor

The detection and localization of gas releases, such as methane from leaking natural gas pipelines or nitrogen oxides from failing electrical equipment, require high sensitivity to the target gas and insensitivity...

Portable Acousto-Optic Spectrometers

Spectrometers are widely used for applications such as chemical analysis, remote sensing, quality control, environmental monitoring, spaceborne measurements, and optical measurements. Most spectrometers...

A Nanotech Sensor Turns Molecular Fingerprints into Bar Codes

Infrared spectroscopy is the benchmark method for detecting and analyzing organic compounds. However, that requires complicated procedures and large, expensive instruments, making...

Nuclear Radiation-Detecting Device

A material was developed for nuclear radiation detection that could provide a significantly less expensive alternative to the detectors now in commercial use. Specifically, the high-performance material is...

Correlation Spectrometer

Correlation spectroscopy is an attractive technique for sensing and analysis applications because it combines the attributes of mechanical and optical simplicity, high selectivity, and good sensitivity. In...

Miniature Mass Spectrometer

For decades, mass spectrometers have offered a relatively fast and highly sensitive way to analyze and detect chemical compounds. But their bulky size has been a hindrance, limiting the in-field potential of the...

Sensor Networks — The Platform for a Connected Farm

Farming has not been untouched by the IoT revolution. The relationships among field conditions, crops, and strategies for planting, irrigating, and harvesting are complex, yet vital for...