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A 3D topographic image of a single voxel of polymerized resin, surrounded by liquid resin. NIST researchers used their sample-coupled-resonance photo-rheology (SCRPR) technique to measure how and where there material’s properties changed in real time at the smallest scales during the 3D printing and curing process. Credit: NIST

New method to measure 3D polymer processing precisely

Scientists at the National Institute of Standards and Technology (NIST) have demonstrated a novel method based on light-based atomic force microscopy (AFM), named sample-coupled-resonance photorheology...
Illustration depicting how specific frequencies, or colors, of light (sharp peaks) emerge from the electronic background noise (blue) in NIST’s ultrafast electro-optic laser. The vertical backdrop shows how these colors combine to create an optical frequency comb, or “ruler” for light. Credit: D. Carlson/NIST

New electro-optic laser pulses 100 times faster than usual ultrafast light

Using common electronics, NIST scientists have developed a laser that pulses 100 times more often than conventional ultrafast lasers. This newly developed laser is expected...
(a) Experimental ranging setup. A target obstructed by flames (depicted is an acetylene flame) is scanned with a FMCW LADAR. The target is placed ∼0.5  m behind this wall of flames. The total stand-off is 2 m. Range measurements are taken continuously at a 1-kHz update rate. A fast-steering mirror (FSM) sweeps the beam across the target, and the resulting 3D point cloud is then transformed to obtain Cartesian ??? points. (b) ??? 3D point clouds. Left panel, machined aluminum step-block. Right panel, video (see Visualization 1) of a piece of chocolate, showing the deformation due to the flame heat (the frame rate is accelerated 60× to 1 Hz).

Laser ranging can see 3D objects melting in fires

Using Laser detection and ranging (LADAR) system, scientists at the NIST have imaged three-dimensional (3D) objects melting in flames. Doing this, they got a precise, safe and...
New instrument helps scientists see what they couldn't see before

New instrument helps scientists see what they couldn’t see before

Scientists at the National Institute of Standards and Technology (NIST) have to build a new custom-instrument that enables scientists to glimpse moment-by-moment changes in materials on...

How reliable are turtles for measuring ocean trash and marine health?

Marine debris, including plastics, paper, wood, metal, and other manufactured materials are found on beaches worldwide and at all depths of the ocean. About...
Schematic of the coating layers in a typical automobile composite body. Mar and scratch damages from a variety of object impacts are shown. Credit: Eastman Chemical Co./ K. Irvine, NIST

To improve auto coatings, new tests do more than scratch the surface

Scientists at the National Institute of Standards and Technology (NIST) have developed a new suite of tests for simulating scratching processes on automobile clearcoats. Data from...
A prototype of the smart mirror. Laser light bounces off the highly reflective surface of a silicon plate, visible in the middle of a thick black ring of plastic. Credit: Jennifer Lauren Lee/NIST

Introducing the Smart Mirror

Lasers assume jobs in many assembling forms, from welding auto parts to making engine segments with 3D printers. To control these tasks, makers must...
(a) Video of methane flame and picture of a plastic skeleton, Visualization 2. (b) False-colored rendered 3D 1-million-point cloud of the plastic skeleton as mapped in 3D through the flame.

NIST shows laser ranging can see 3D objects melting in fires

Using laser detection and ranging (LADAR) system melting 3D objects, scientists at the National Institute of Standards and Technology (NIST) have set an example of a precise,...
Schematic of the setup for photo-thermal induced resonance (PTIR), which includes an infrared laser source and atomic force microscope (AFM) cantilever with a sharp tip that touches the sample and vibrates in response to the sample’s light-induced expansion. PTIR can determine the folding pattern (called for example α-helix, β-sheet) of peptides (amino acid chains) in water with nanometer-scale resolution. Credit: NIST

First nanometer-scale measurements of the folded structure of biomolecules in liquids

Scientists have previously developed a spectroscopy technique to measure a material's topography and chemical composition with nanometer-scale. Now NIST scientists came up with little improvement...

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