Navigation Links
NIST's LIDAR may offer peerless precision in remote measurements
Date:5/24/2009

By combining the best of two different distance measurement approaches with a super-accurate technology called an optical frequency comb, researchers at the National Institute of Standards and Technology (NIST) have built a laser ranging system that can pinpoint multiple objects with nanometer precision over distances up to 100 kilometers. The novel LIDAR ("light detection and ranging") system could have applications from precision manufacturing lines on Earth to maintaining networks of satellites in perfect formation, creating a giant space-based platform to search for new planets.

LIDAR transmits light through the air and analyzes the weak reflected signal to measure the distance, or range, to the target. NIST's new LIDAR, described in Nature Photonics,* has a unique combination of capabilities, including precision, rapid updates from multiple reference points at the same time, and minimal "measurement ambiguity." The system can update measurements to multiple targets simultaneously every 200 microseconds. Measurement ambiguity in a LIDAR system is due to the fact that, if the target is at long range from the instrument, the system can't distinguish between two different distances that are multiples of its "ambiguity range." The new NIST LIDAR has a comfortably large ambiguity range of at least 1.5 meterslarge enough to check the coarse distance with widely available technologies such as GPS.

No other ranging system offers this combination of features, according to the new paper. NIST's LIDAR could enable multiple satellites to maintain tight spacing and pointing while flying in precision formations, acting as a single research instrument in space, the paper states. Formation flying has been proposed as a means to enhance searches for extraterrestrial planets, enable imaging of black holes with multiple X-ray telescopes on different satellites, and support tests of general relativity through measurements of satellite spacing in a gravitational field. The new LIDAR could enable continuous comparisons and feedback of distances to multiple reference points on multiple satellites. There also may be applications in automated manufacturing, where many parts need to fit together with tight tolerances, according to Nate Newbury, the principal investigator.

NIST's LIDAR design derives its power from combining the best of two different approaches to absolute distance measurements: the time-of-flight method, which offers a large ambiguity range, and interferometry, which is ultraprecise. The LIDAR relies on a pair of optical frequency combs, tools for precisely measuring different colors (or frequencies) of light. The frequency combs used in the LIDAR are based on ultrafast-pulsed fiber lasers, which are potentially smaller and more portable than typical combs that generate laser light from crystals. The two combs operate at slightly different numbers of pulses per second. Pulses from one comb are reflected from a moving target and a stationary reference plane. The second comb serves as precise timer to measure the delay between the reflections returning from the target and from the reference plane. A computer calculates the distance between the target and the reference plane by multiplying the time delay by the speed of light.


'/>"/>

Contact: Laura Ost
laura.ost@nist.gov
303-497-4880
National Institute of Standards and Technology (NIST)
Source:Eurekalert

Related biology technology :

1. Dynavax Issued Landmark Patent Covering Second-Generation TLR9 Agonists
2. BitWine (TM) Nutrition Advisors Network Expands Roster of Licensed Dietitians and Nutritionists
3. Pharmos Announces Agreement to Sell Certain CB2 Selective Agonists
4. Emisphere Technologies, Inc. Announces Pricing of Registered Direct Offering
5. Roche Extends Tender Offer for Ventana
6. ATS Medical Expands Open Pivot Heart Valve Offerings
7. New 200 mg Vial for Eloxatin(R) (Oxaliplatin Injection) Offers Greater Convenience and Efficiency of Preparation
8. Updated NIH Guidelines Offer Valuable Information on Asthma Diagnosis and Management
9. ARYx Therapeutics, Inc. Files Registration Statement for Initial Public Offering
10. Anacor Files Registration Statement for Initial Public Offering
11. NPS Pharmaceuticals Commences Tender Offer for 3.0% Convertible Notes Due 2008
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2017)... --  Boston Biomedical , an industry leader in the ... stemness pathways, today announced its Board of Directors has ... Officer, effective April 24, 2017. Ms. ... FACP, who has led Boston Biomedical since he founded ... Biomedical has grown from a "garage startup" without technology ...
(Date:3/22/2017)... Yorba Linda, Ca (PRWEB) , ... March 21, ... ... immunogenicity, and clearance of biologics. To acquire information on the desired increase and/or ... in the biopharmaceutical industry for rapid N-glycosylation profiling of therapeutic antibodies. , ...
(Date:3/22/2017)... ... March 21, 2017 , ... ... has unveiled its innovative Quantum peristaltic pump with patented ReNu single-use (SU) ... the new standard for high-pressure feed pumps in SU tangential flow filtration ...
(Date:3/22/2017)... N.J. and PETACH TIKVAH, Israel ... Inc. (NASDAQ: BCLI), a leading developer of adult stem ... Chaim Lebovits , Chief Executive Officer, will provide an ... Sachs Associates 2 nd Annual Neuroscience Biopartnering and ... at the New York Academy of Sciences. ...
Breaking Biology Technology:
(Date:2/28/2017)... , February 28, 2017 News solutions for ... ... from 14 to 16 March, Materna will present ... show how seamless travel is a real benefit for passengers. ... biometrics to their passenger touch point solutions to take passengers through ...
(Date:2/24/2017)... , Feb. 24, 2017  EyeLock LLC, a leader of ... elite iris biometric solution on the latest Qualcomm® ... at Mobile World Congress 2017 (February 27 ... in Hall 3, Stand 3E10. ... Haven™ security platform—a combination of hardware, software ...
(Date:2/16/2017)... 16, 2017  Genos, a community for personal ... has received Laboratory Accreditation from the College of ... to laboratories that meet stringent requirements around quality, ... processes. "Genos is committed to maintaining ... We,re honored to be receiving CAP accreditation," said ...
Breaking Biology News(10 mins):