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Metrology

Optical / photometry / laser metrology

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NIST Neutral as Butter War Spreads

January 6, 2017

In 1917, NIST physicists Irwin Priest and Chauncey Peters were drawn into the so-called Butter War, an early 20 th century commercial and political spat between

Harry Keegan seated at mechanical calculator CIE color coordinates of standard sources, 1958

Calculating Color

December 14, 2016

Harry Keegan of NIST’s Photometry & Colorimetry Division using a mechanical calculator in 1958 to compute color coordinates for standard sources.

Artifact with six reflective spheres at each end used in NIST’s new standard test method for evaluating the performance of optical tracking systems.

New Standard Helps Optical Trackers Follow Moving Objects Precisely

November 22, 2016

Throwing a perfect strike in virtual bowling doesn’t require your gaming system to precisely track the position and orientation of your swinging arm. But if you

Seeing Light’s Effect on Atoms — Within Picoseconds

November 16, 2016

For the first time in a laboratory setting, NIST scientists have made stop-action x-ray measurements of the way visible light interacts with atoms and molecules

Screenshot of an animation of a superradiant laser

JILA’s Superradiant Laser May One Day Boost Atomic Clocks and ‘Rulers’ for Space

October 14, 2016

BOULDER, Colo. – JILA physicists have demonstrated a novel laser design based on synchronized emissions of light from the same type of atoms used in advanced

New Chip-Based Sensor Finds Power in Versatility

April 26, 2016

Whether you're using a landline or cell phone, there's a good chance that the signal spends at least some time traveling over fiber-optic cables. To ensure that

Optical Clocks Synched to Femtoseconds -- Through the Air

April 21, 2016

NIST researchers have devised a way to synchronize the time of two different clocks – separated by as much as 4 km of open, turbulent air – to within a few

False-color scanning electron micrograph of a nanophotonic frequency converter

New Nanodevice Shifts Light's Color at Single-Photon Level

April 18, 2016

Converting a single photon from one color, or frequency, to another is an essential tool in quantum communication, which harnesses the subtle correlations

Shiny and (Electro)chrome: New Twist on Old Tech Could Bring Living Color at Low Power

February 2, 2016

By marrying state-of-the-art nanometer-scale gratings with a Space Age-era thin-film polymer, researchers working at the National Institute of Standards and

Transforming Welding with Comprehensive NIST Metrology

February 2, 2016

Welding has been around, in some form, for centuries. Today it enables a large percentage of the U.S. economy,* thanks to its role in the creation of a diverse

Thinking Outside the Cuvette: To Measure Dimensions of Skinny Glass Container, PML Scientists Get Creative

February 1, 2016

Let's say you're a biotechnologist working to develop new medicines or a better test for forensic analysis. You might find yourself frequently using absorbance

Ringing in a New Way to Measure and Modulate Trapped Light

December 22, 2015

Researchers working at the National Institute of Standards and Technology (NIST) have developed a novel way to noninvasively measure and map how and where

Reading the Secrets of Ancient Light

June 19, 2015

Much of what we know about the origin and early history of the universe comes from a phenomenon discovered by accident 50 years ago: The cosmic microwave

Photonic Thermometers: Out of the Lab, Into a Bucket of Water

April 28, 2015

A new class of tiny chip-based thermometers being developed by PML's Sensor Science Division has the potential to revolutionize the way temperature is gauged

integrating sphere for light measurements

Following a New MAP for Solid-State Lighting

February 19, 2015

LED lights are notably cool. But as an industry sector, solid-state lighting (SSL) keeps heating up, with demand growing rapidly in residential, commercial, and

New Accelerometer Calibration Service to Start Soon

February 19, 2015

In a few weeks, NIST will begin offering a new, state-of-the-art calibration service for accelerometers. Based on a technique called laser interferometry, the

Lighting the Path to Smaller, Tougher Thermometers

December 15, 2014

Two new prototypes for tiny chip-based thermometers are illuminating light's potential to revolutionize the way temperature is gauged. With further development

Taking the Wraps off NISTAR

December 2, 2014

The NIST Advanced Radiometer (NISTAR), mothballed for more than a decade, is slated to make its space debut very soon about 1.5 million kilometers sunward of

Low Error-Rate Detector System for Telecommunications

December 2, 2014

NIST scientists have devised an experimental photon-detection system for communications with error rates far below even the most ideal conventional designs

Gauging the Hue of the Sea

November 24, 2014

The world's oceans face multiple threats, and fisheries, marine biologists, and environmental scientists need accurate and timely data about changing conditions

Earth Science: Seeing the Surface Clearly

November 24, 2014

Satellite observation has revolutionized our understanding of terrestrial conditions and climate dynamics. But the measurement science is extremely demanding

World's First Photonic Pressure Sensor Outshines Traditional Mercury Standard

October 29, 2014

For almost 400 years, mercury gauges have prevailed as the most accurate way to measure pressure. Now, within weeks of seeing "first light," a novel pressure

NIST Laser Comb System Maps 3D Surfaces Remotely for Manufacturing, Forensics

October 7, 2014

Researchers at the National Institute of Standards and Technology (NIST) have demonstrated a laser-based imaging system that creates high-definition 3D maps of

Photons by the Numbers

September 25, 2014

A NIST team is at work on what promises to be one of the world's most accurate methods for generating a specified number of photons, and has devised a method to

Calibrating Cancer Radiotherapy Beams Using Light and Sound

September 17, 2014

Doctors shrink tumors with radiation therapy, but a badly calibrated beam can cause serious complications. Scientists in NIST's Radiation Physics Division in

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