Navigation Links
From lectures to explosives detection: Laser pointer identifies dangerous chemicals in real-time
Date:10/25/2012

WASHINGTON, Oct. 9, 2012By using an ordinary green laser pointer, the kind commonly found in offices and college lecture halls, an Israeli research team has developed a new and highly portable Raman spectrometer that can detect extremely minute traces of hazardous chemicals in real time. The new sensor's compact design makes it an excellent candidate for rapid field deployment to disaster zones and areas with security concerns. The researchers will present their findings at Laser Science XXVIIIthe American Physical Society Division of Laser Science's Annual Meetingcollocated with the Optical Society's (OSA) Annual Meeting, Frontier in Optics (FiO), taking place in Rochester, N.Y. next week.

Raman spectrometers rely on highly focused beams of light at precise wavelengths to illuminate small samples of materials. Very sensitive detectors then study the spectra of light that has been re-emitted, or scattered, by the sample. Most of this scattered light retains its original frequency or color, but a very small percentage of that light is shifted ever so slightly to higher or lower wavelengths, depending on the unique vibrational modes of the sample being studied. By comparing the shifted and the original wavelengths, it's possible to determine the precise chemicals present in the sample.

The researchers brought this capability down to size by constructing their Raman spectrometer using a low-power and low-cost commercial green laser pointer. The green laser's relatively short wavelength helped to improve the detection of the inherently weak Raman signal. The spectrometer also has the capability to first scan the entire sample optically, sweeping from side to side, to locate individual particles of interest a task usually performed by large and cumbersome Raman microscopes.

"Since the overall system is modular, compact, and can be readily made portable, it can be easily applied to the detection of different compounds and for forensic examination of objects that are contaminated with drugs, explosives, and particularly explosive residues on latent fingerprints," said Ilana Bar, a researcher with the Department of Physics at Ben-Gurion University of the Negev in Israel. "With proper investment this system could be deployed quite quickly as a consumer product." Other members of the research team include Itamar Malka, Alona Petrushansky, and Salman Rosenwaks.

Presentation LTh3I.3, "Detection of Explosives and Latent Fingerprint Residues Utilizing Laser Pointer Based Raman Spectroscopy," takes place Thursday, Oct. 18 at 2:30 p.m. EDT at the Rochester Riverside Convention Center in Rochester, N.Y.


'/>"/>
Contact: Angela Stark
astark@osa.org
202-416-1443
Optical Society of America
Source:Eurekalert  

Related biology technology :

1. Graphene foam detects explosives, emissions better than todays gas sensors
2. Eye Surgery Center of Michigan First in Southeast Michigan to Perform Bladeless Cataract Surgery Using New LenSx® Laser Technology
3. New method for enhancing thermal conductivity could cool computer chips, lasers and other devices
4. Research could improve laser-manufacturing technique
5. Cooling semiconductor by laser light
6. New laser can point the way to new energy harvesting
7. Metamaterials may advance with new femtosecond laser technique
8. UCSB Physicists mix 2 lasers to create light at many frequencies
9. CU-Boulder physicists use ultrafast lasers to create first tabletop X-ray device
10. JPSA Introduces Picosecond Laser Micromachining System
11. Calmar Laser Growth Reinforced by ISO 9001:2008 Certification
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
From lectures to explosives detection: Laser pointer identifies dangerous chemicals in real-time
(Date:5/18/2017)... ... May 17, 2017 , ... NDA Partners Chairman Carl Peck, MD , ... Advantar Laboratories and President of Pharmaceutical Development Business Unit of Cardinal Health, has joined ... Cardinal Health, he was former Chief Operating Officer at Anaborex, Senior VP and General ...
(Date:5/18/2017)... , ... May 17, 2017 , ... ... in medical device compliance and commercialization, has just released version 9.0 of the ... into this latest version of Cockpit,” says David Cronin, CEO of Cognition. “We’re ...
(Date:5/18/2017)... ... May 17, 2017 , ... ... varying industries, including food and dairy, munitions, and pharmaceutical/biotech, recently introduced The Revolution ... ease of use. The improvement in technology comes on the heels of HOLLOWAY’s ...
(Date:5/18/2017)... ... 2017 , ... Many complicated neurological disorders appear to have ... while men are at greater risk for Parkinson’s disease. Understanding some of the ... of a research program at Worcester Polytechnic Institute (WPI) funded by a new ...
Breaking Biology Technology:
(Date:3/23/2017)... India , March 23, 2017 The report "Gesture ... Touchless Biometric), Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, ... at a CAGR of 29.63% between 2017 and 2022. ... ... ...
(Date:3/22/2017)... 21, 2017 Vigilant Solutions , a ... enforcement agencies, announced today the appointment of retired FBI ... public safety business development. Mr. Sheridan brings ... including a focus on the aviation transportation sector, to ... position, Mr. Sheridan served as the Aviation Liaison Agent ...
(Date:3/13/2017)... Future of security: Biometric Face Matching software  ... ... Matching enables to match face pictures against each other or against large databases. ... Systems) ... the fastest software for biometric Face Matching on the market. The speed is ...
Breaking Biology News(10 mins):