Featured Research

from universities, journals, and other organizations

Busting rust with light: New technique safely penetrates top coat for perfect paint job

Date:
May 20, 2014
Source:
The Optical Society
Summary:
To keep your new car looking sleek and shiny for years, factories need to make certain that the coats of paint on it are applied properly. But ensuring that every coat of paint -- whether it is on a car or anything else -- is of uniform thickness and quality is not easy. Now researchers have developed a new way to measure the thickness of paint layers and the size of particles embedded inside.

This three-dimensional image of a small patch of a painted surface shows that the paint is non-uniform, consisting of four different layers.
Credit: Applied Research and Photonics

To keep your new car looking sleek and shiny for years, factories need to make certain that the coats of paint on it are applied properly. But ensuring that every coat of paint -- whether it is on a car or anything else -- is of uniform thickness and quality is not easy.

Now researchers have developed a new way to measure the thickness of paint layers and the size of particles embedded inside. Unlike conventional methods, the paint remains undamaged, making the technique useful for a variety of applications from cars to artifacts, cancer detection and more. The researchers will describe their work at CLEO: 2014 being held June 8-13 in San Jose, California, USA.

"It's a problem that's quite challenging," said Anis Rahman, founder of Applied Research and Photonics, Inc., in Harrisburg, Pennsylvania. "None of the current methods are very successful in determining the thickness of individual layers and coatings in a nondestructive fashion."

The new technique, which was developed by Rahman and his son, Aunik, uses terahertz reflectometry, in which a beam of terahertz-frequency radiation is fired onto the paint. Terahertz radiation, which has frequencies between infrared and microwave radiation, is nonionizing and therefore harmless, Rahman said.

The terahertz beam penetrates the paint layers, which are each tens of microns (millionths of a meter) thick and bounces back at different intensities of light depending on the thickness of each layer of material the beam encounters. Measuring the intensities of the reflected beams reveals the thickness of each coat of paint down to a precision of tens of nanometers, almost a million times narrower than the head of a pin. This method can also be used to estimate the size of any particles added to the paint as small as 25 nanometers.

In addition to quality control, the method would be useful for testing paints as well, Rahman said. For example, in order for an overcoat on a car to protect the paint underneath, the two layers have to remain separate. Terahertz reflectometry can be used to make sure that the overcoat does not penetrate the layers below. The method can also help companies analyze how their paints react with different surfaces, such as plastic, wood or metal.

Environmental health applications are also possible, Rahman said, since the method can help detect whether old paint contains lead. Archaeologists and art historians can even employ it to analyze the paint on artifacts.

But terahertz reflectometry is useful for more than analyzing paint, Rahman added. The researchers are now configuring their techniques to analyze the structure of skin as a way to help diagnose early stages of skin cancer such as melanoma and basal cell carcinoma. With the addition of spectroscopy to measure the different wavelengths of reflected beams, this technique can be used to analyze the structure of skin layers and determine if they are healthy or diseased.

The instrument is ready for commercialization and Rahman says they are currently looking for partners to help bring it to market.


Story Source:

The above story is based on materials provided by The Optical Society. Note: Materials may be edited for content and length.


Cite This Page:

The Optical Society. "Busting rust with light: New technique safely penetrates top coat for perfect paint job." ScienceDaily. ScienceDaily, 20 May 2014. <www.sciencedaily.com/releases/2014/05/140520120039.htm>.
The Optical Society. (2014, May 20). Busting rust with light: New technique safely penetrates top coat for perfect paint job. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2014/05/140520120039.htm
The Optical Society. "Busting rust with light: New technique safely penetrates top coat for perfect paint job." ScienceDaily. www.sciencedaily.com/releases/2014/05/140520120039.htm (accessed October 22, 2014).

Share This



More Matter & Energy News

Wednesday, October 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Chameleon Camouflage to Give Tanks Cloaking Capabilities

Reuters - Innovations Video Online (Oct. 22, 2014) — Inspired by the way a chameleon changes its colour to disguise itself; scientists in Poland want to replace traditional camouflage paint with thousands of electrochromic plates that will continuously change colour to blend with its surroundings. The first PL-01 concept tank prototype will be tested within a few years, with scientists predicting that a similar technology could even be woven into the fabric of a soldiers' clothing making them virtually invisible to the naked eye. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Jet Sales Lift Boeing Profit 18 Pct.

Jet Sales Lift Boeing Profit 18 Pct.

Reuters - Business Video Online (Oct. 22, 2014) — Strong jet demand has pushed Boeing to raise its profit forecast for the third time, but analysts were disappointed by its small cash flow. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Internet of Things Aims to Smarten Your Life

Internet of Things Aims to Smarten Your Life

AP (Oct. 22, 2014) — As more and more Bluetooth-enabled devices are reaching consumers, developers are busy connecting them together as part of the Internet of Things. (Oct. 22) Video provided by AP
Powered by NewsLook.com
What Is Magic Leap, And Why Is It Worth $500M?

What Is Magic Leap, And Why Is It Worth $500M?

Newsy (Oct. 22, 2014) — Magic Leap isn't publicizing much more than a description of its product, but it’s been enough for Google and others to invest more than $500M. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins