New research revealing this technology will be presented at the Optical Fiber Communication Conference and Exposition/National Fiber Optic Engineers Conference (OFC/NFOEC), being held March 25-29 in Anaheim, Calif.
Currently, industrial processes for inspecting foodstuffs and other items often use "line-scan" cameras, which record images of objects one line at a time, just as fax machines scan documents on a line-by-line basis. Rapid electronic processors then detect whether there are any problems with the items and instruct mechanical actuators (such as air jets) to separate out unsatisfactory items. The problem is current line-scan cameras lack ideal light sources to image objects properly.
Now, Princeton Lightwave of Cranbury, N.J. and OFS Labs (a Somerset, N.J.-based division of Furukawa Electric) have introduced a fiber-optics-based solution, which they will describe in their OFC/NFOEC paper. In their design, a bright light source such as a laser sends light through an optical fiber. Along the length of the fiber is an ultraviolet-light-treated region called a "fiber grating." The grating deflects the light so that it exits perpendicularly to the length of the fiber as a long, expanding rectangle of light. This optical rectangle is then collimated by a cylindrical lens, such that the rectangle illuminates objects of interest at various distances from the source. The bright rectangle allows line scan cameras to sort products at higher speeds with improved accuracy.
The new fiber-based light source combines all the ideal features necessary for accurate and efficient scanning: uniform, intense illumination over a rectangular region; a directional beam that avoids wasting unused light by only illuminating the rectangle; and a "cool" source that does not heat up the objects to be imaged. Currently employed light sources such as tungsten halogen lamps or arrays of light-emitting diodes lack at least one of these features.
According to the researchers, this fiber-based device can be customized for a specific inspection application within four to six weeks, then manufactured for that application in 16 to 20 weeks.
Meeting Paper: G.E. Carver, K.S. Feder, P.S. Westbrook, "FBG Based Distributed Lighting for Sensing Applications," Presentation OThP1, Thursday, March 29, 3 p.m. PDT; meeting paper available upon request from Colleen Morrison, firstname.lastname@example.org.
OFC/NFOEC, www.ofcnfoec.org, is managed by the Optical Society of America (OSA), a member society of the American Institute of Physics, and co-sponsored by OSA, the Institute of Electrical and Electronics Engineers/Communications Society (IEEE/ComSoc) and the Institute of Electrical and Electronics Engineers/Lasers and Electro-Optics Society (IEEE/LEOS). Acting as a non-financial technical co-sponsor is Telcordia Technologies, Inc.
Colleen Morrison | EurekAlert!
Batteries with better performance and improved safety
23.11.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt
Researchers take next step toward fusion energy
16.11.2017 | Texas A&M University
Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...
The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
23.11.2017 | Information Technology
23.11.2017 | Physics and Astronomy
23.11.2017 | Life Sciences