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Physical Measurement Laboratory

PML is a world leader in the science of measurement. We determine the definitive methods for nearly every kind of measurement employed in commerce and research, provide NIST-traceable calibrations, and disseminate standards and best practices throughout the nation. At the same time, PML works continuously at the outermost frontiers of metrology, devising tools and techniques to meet the ever-changing demands of American industry and science.

chip
New Device Design Brings Unparalleled Confidence to Cell Measurements
seeing around corners setup
Out of the Shadows: New Imaging Method Reveals Concealed Objects

News and Updates

Events

5801 Mass Metrology Seminar

Mon, Aug 1 - Fri, Aug 12 2022
The Mass Metrology Seminar is a two-week, "hands-on" seminar. It incorporates approximately 30 percent lectures and 70

5802 Fundamentals of Metrology

Mon, Aug 22 - Fri, Aug 26 2022
The 5 day Fundamentals of Metrology seminar is an intensive course that introduces participants to the concepts of

5812 Volume Metrology Seminar

Mon, Aug 29 - Fri, Sep 2 2022
The 5-day OWM Volume Metrology Seminar is designed to enable metrologists to apply fundamental measurement concepts to

Industry Impacts

A streaked image of a taxi and a dark car driving in Times Square, New York City street at night.

Fare Standards for Rideshare Services

To calculate fares, app-based ride services such as Lyft and Uber don’t use traditional taxi meters, but instead combine data from GPS and cellular networks to
Illustrative subset of parameterized shapes available for nanoscale photonic, electronic, mechanic, fluidic, and other applications.

Nanolithography Design Tools

Accurate production of nanoscale features on semiconductor chips is essential to their performance, but typical design tools cater to the dominance of straight
Image of a radiation pressure power meter

High-Power Lasers for Manufacturing 

Measuring the intensity of high-power lasers used by manufacturers for precision cutting and welding can be difficult due to large instrumentation challenges
atom-based magnetic sensor

Brain Mapping Technologies

Magnetic signals produced by electrical currents in the brain can be used to map brain processes and help in the diagnosis and treatment of disease

Awards

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Press Coverage

Patents

A timeline of long distance communication techniques

Communication Linker for Communication Linking

NIST Inventors
Sergey Polyakov and Ivan Burenkov
Patent Description The US has the leading optical communication industry and one of the largest telecommunication markets. Our invention directly improves the underlying technology of the telecommunication infrastructure. Quantum Coherent Frequency Shift Keying (CFSK) receiver is a device that

Optical Phantom for Producing a Time-Resolved Diffuse Reflectance Spectrum

NIST Inventors
Jeeseong C. Hwang
Patent Description Physikalisch-Technische Bundesanstalt (PTB) and NIST jointly developed a concept for a waveform synthesizer which can generate a controlled waveform with several picosecond (ps) time resolution. In a light-diffusing material, characteristics of the time-of-flight distribution (e.g
Line drawing of the thermal impedance amplifier

Thermal Impedance Amplifier

NIST Inventors
Adam McCaughan , Varun Verma , Sonia Buckley and Sae Woo Nam
Patent Description Presently, superconducting electronics are being applied to areas such as computational backends for future quantum processors, high-performance supercomputing, and ultrafast digital signal processing. In all of these areas, data must be communicated between the superconducting
This image of a chart titled "How does it work" that describes the optomechanical reference.

Optomechanical Reference

NIST Inventors
Gordon A. Shaw and Jacob Taylor
A mechanical sensor incorporating an optical cavity is used to provide a mass and/or force reference from a known or characterized circulating optical power in the optical cavity. The radiation pressure force in the optical cavity is used to actuate the mechanical sensor. The optical cavity in put

Contacts

PML Director and Deputy Director

Associate Director for Measurement Services and Associate Director

Executive Secretaries