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Physical Measurement Laboratory

Sensor Science Division

Patents

Searches Patent Title, Abstract, Body, Technology Type, and NIST Inventors
Displaying 1 - 13 of 13
One embodiment of the invention.

Mueller Matrix Ellipsometer

NIST Inventors
Thomas A. Germer
A multi-mirror polarization state generator is combined with a multi-mirror polarization state analyzer and a detector to realize a Mueller matrix ellipsometer. It is found that grazing incidence reflection from a number of materials provides sufficient optical phase retardance to make this possible
Depiction of packaging assembly with all modules

A Super Accurate Temperature Sensor That Works Without Electricity

NIST Inventors
Nikolai Klimov , Tobias Herman and Zeeshan Ahmed
This invention introduces a photonic thermometer that uses optical fibers to measure temperature. The thermometer is designed with a sheath and module assembly to enhance accuracy and durability. It leverages photonic technology to provide precise temperature readings without relying on traditional

Photonic Bolometer And Performing Broadband High-Absorption Photonic Bolometry

NIST Inventors
Nikolai Klimov , Nathan A Tomlin and Chris Yung
A photonic bolometer includes: a photonic chip; a weak thermal link; a thermally-isolated member, and the weak thermal link thermally isolates the thermally-isolated member from the photonic chip; a photonic temperature sensor; a chip waveguide in optical communication with the photonic temperature

Self-Referenced Ambient Radiation Thermometer

NIST Inventors
Howard W. Yoon
In this work, we describe the construction and characterization of an Ambient-Radiation Thermometer (ART) which can measure non-contact temperatures from -50 deg C to 150 deg C. To increase the long-term stability of the responsivity, optical components within the field-of-view of the detector and

Optical Refraction Barometer

NIST Inventors
Kevin O Douglass , Stephen Eckel , Jacob Edmond Ricker and Jay H. Hendricks
A new method for measuring refractivity-based pressure changes using a dual Fabry-Perot cavity utilizing a single laser with off-set sideband locking to the second cavity. The method thus far has shown sensitivity and resolution of 4 mPa.

Smart Temperature Sensor That Works Without Touch

NIST Inventors
Howard W. Yoon
This invention introduces a temperature detector that stabilizes radiation measurements using an isothermal reference. It ensures high accuracy by self-referencing ambient radiation, reducing errors caused by environmental fluctuations. The detector is designed to work without direct contact, making
Patent Images and description for 10,955,617

High-Resolution Photonic Thermometer Article

NIST Inventors
Kevin O Douglass , Zeeshan Ahmed and Nikolai Klimov
A high-resolution photonic thermometer article performs high-resolution thermometry and includes: a light source; a photonic thermometer with a waveguide and a photonic crystal cavity that stores light; a photodetector in communication with the photonic thermometer; a phase sensitive detector in

Triple Point Immersion Cell Article

NIST Inventors
Jay Nanninga and Weston L. Tew
A triple point immersion cell article determines a triple point of a non-metallic analyte and includes: a first cryochamber including a first cryo-zone; a second cryochamber including a second cryo-zone that is: nested and disposed in the first cryochamber; and thermally isolated by the first
Image for 10,816,325

Deformometer for Determining Deformation of an Optical Cavity Optic

NIST Inventors
Zeeshan Ahmed , Kevin O Douglass , Stephen Eckel , Patrick Egan and Jay H. Hendricks
A superconducting waveform synthesizer produces an arbitrary waveform and includes an encoder that produces a bitstream; a pattern generator that produces a current bias pulse from the bitstream; a Josephson junction that produces a quantized output pulse from the current bias pulse; and a converter
The optofluidic flowmeter determines flow rate by measuring the amount of photobleaching in a dye such as fluorescein.

Optical Flow Meter

NIST Inventors
Anthony J. Kearsley , Paul Patrone and Gregory A Cooksey
NIST scientists have developed an optical flow meter that can continuously measure flow in the nanoliter per minute range. Over the instrument’s dynamic range, the relative uncertainty in flow rate remains constant and can be controlled to within 5% or better. No existing technology can
Image of devices on a table

Optical Parametric Oscillator

NIST Inventors
John T. Woodward IV
An optical parametric oscillator produces optical parametric light and includes a frequency splitter to produce signal light and idler light; a wavelength selector to select a wavelength of the signal light and to produce optical parametric light from the selected wavelength of the signal light; and

A Method Of Mode Identification In Photonic Resonator

NIST Inventors
Zeeshan Ahmed
We describe a method for distinguishing optical modes of a resonator based on the characterization of the temperature sensitivity of a mode’s resonance frequency and its dispersion characteristics. This method requires an interrogator (made up of a tunable laser, broadband light source, frequency
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