Ole Laursen wrote:
> Hej,
>
> Er der nogen her der kan fortælle mig hvor meget energi man kan
> transportere gennem et almindeligt lyslederkabel?
>
> Kunne man f.eks. principielt sætte et spejl op og reflektere en kvm
> sollys ind i en lysleder for så at tappe lyset en km væk? Hvad med en
> intensitet svarende til en kvadratkilometer sollys?
>
> Hvis der er lidt energitab i fiberen, bliver den selvfølgelig varmet
> op, men er det det eneste problem?
>
Hej Ole
Man kan godt "putte" lys ind i en lysleder, spørgsmålet er hvor meget.
Men det kommer også an på hvilken fibertype man anvender.
Almindelige massive lysledere af kvarts har dog lavest tab ved ca. 850,
1300 og 1500 nm (afhænger meget af forskellige sporstoffer). Tabene ved
synligt lys er højere.
http://en.wikipedia.org/wiki/Fiber_optic
Tegning med tab som funktion af bølgelængden:
http://en.wikipedia.org/wiki/Fiber_optic#History
Kig især på figur 3 ca. halvvejs nede:
A Brief History of Fiber Optic Technology:
http://www.fiber-optics.info/fiber-history.htm
Men fotoniske fibre har lavere tab - i bestemte bølgelængdeintervaller
bestemt af lufthullerne i fiberet.
Fiber Optic History By Jeff Hecht:
http://www.sff.net/people/Jeff.Hecht/history.html
Lasers and Fiber Optics Timeline:
http://www.greatachievements.org/?id=3706
Fiber optic lighting for vehicles?:
http://www.halfbakery.com/idea/Fiber_20optic_20lighting_20for_20vehicles
-
Slut med at skifte pærer på svære steder?:
Sollys på dåse skal erstatte elektrisk lys.
Amerikanske forskere har udviklet en teknologi, hvor sollyset fanges og
ved hjælp af optiske fibre kan det ledes ind i bygninger og bruges som
belysningskilde. Det kan spare enorme mængder energi, vurderer forskerne.
http://www.ing.dk/article/20050328/NATUR/103250015
Citat: "...
Det skriver online-magasinet World Science.
...
Teknologien er baseret på at lede lyset via optisk fibre. Forskere på
Oak Ridge National Laboratory i Oak Ridge, Tennessee, har udviklet et
system, hvor et apparat placeret på taget skal opsamle sollyset og sende
det via rør ned i bygningen.
Sensor skal regulere frigivelse af lys
..."
Remote-Source Lighting:
http://www.bchydro.com/business/investigate/investigate770.html
An Able Cable.
Fiber-optic lighting is more than a high-tech fad — glass tubes of light
can save energy and mean the end of hard-to-change lightbulbs.
http://www.thisoldhouse.com/toh/knowhow/electrical/article/0,16417,198683,00.html
Pure Energy Systems News. Cool Light on Hot Days: Fiber Optics Bring the
Sun Indoors.
Piping in sunlight without using electricity is a win-win proposition
for the ecosystem and human society. Both home and business customers
anticipate energy savings and a more pleasant indoor environment:
http://pesn.com/2005/07/27/9600139_Fiber_Optics_Bring_Sun_Indoors/
Citat: "...The HSL 3000, a hybrid lighting system developed by Sunlight
Direct..."
Is polar bear hair fiber optic?:
http://it.stlawu.edu/~koon/polar.html
2004-05-24, Sciencedaily: Tightly Focused Laser Light Generates
Nonlinear Effects And Rainbow Of Color:
http://www.sciencedaily.com/releases/2004/05/040521071505.htm
Citat: "..."supercontinuum generation in nonlinear fibers." The
phenomenon can be observed in a new class of optical fibers, called
photonic crystal fibers. PCFs consist of a tiny solid glass core
surrounded by a cladding, or casing, that contains air holes along the
length of the fiber...As the IR light propagates, or spreads, through a
1-meter-long fiber, the light appears, first orange, then yellow and
finally green...The visible lightwaves emerge from the fiber as white
light, which contains all the colors of the spectrum..."
Der er flere adresser her - og med en lille forklaring:
http://da.wikipedia.org/wiki/Fotonisk_krystal
Fiber Optics and Quartz Halogen Illumination FAQS:
http://www.stockeryale.com/i/foi/faqs.htm
Engelsk Guide/Vejviser:
Optical Fiber, A Directory of Resources on the World Wide Web:
http://www.geocities.com/SiliconValley/Circuit/8070/
POF - Plastic Optical Fiber - Do It Yourself Projects:
http://www.sys-concept.com/POF_DoItYourselfProjects.htm
We carry all sizes of Fiber Optic Lighting fibers in Sideglow, Endglow,
Stranded, Jacketed and Unjacketed for any projects or any age.
We can also design Lighting Effects for your projects. Hobbies, Models,
Landscape, Pools, Signs, Home, and more!:
http://www.fiberopticproducts.com/
Fiber Optic Light Guides:
http://www.globalspec.com/FeaturedProducts/Detail/FiberopticsTechnology/Fiber_Optic_Light_Guides/20117/0
Blue Fiber Optic Light.
This cool, high-tech blue fiber optic lamp is 13 inches tall!:
http://www.physlink.com/estore/cart/BlueFiberOpticLight.cfm
Illuminators for Microscopes - Ring Lights, Fiber Optic Lights:
http://www.microscopeworld.com/accessor/illuminators.htm
Fiber Optic Light Wand:
http://scientificsonline.com/product.asp?pn=3031771&bhcd2=1123922122
Flexible Fiber Optic Light Guides:
http://www.escience.ca/genSci/RENDER/2/1004/1012/10324.html
Citat: "...Approx. 69% of light enters with 7.9% per foot lost..."
Purple Fiber Optic Wig with over 200 light points!:
http://www.costumecraze.com/WIG14.html
http://www.lafventure.com/fiberopticwig.html
White Fiber Optic Wig.
http://www.costumecraze.com/WIG12.html
Fiber Optic Light Collectors:
http://www.hobilabs.com/cms/index.cfm/37/152/1269/1515
Fiber Optic Light Units:
http://www.fiberopticproducts.com/Lightunits.htm
Butterfly Fiber Optic Light Strands:
http://www.jerrybaker.com/index.asp?PageAction=VIEWPROD&ProdID=1672
Magically radiant, our fiber optic products delight even the most
serious Scrooge. Let our fiber optics add a festive glow to your holiday
decorating:
http://www.christmaslightsetc.com/categorydetail.asp?CategoryID=58
Fiber-Optic Alpine Tree:
http://www.improvementscatalog.com/Parent.asp?product=242141x&dept%5Fid=300&subdept%5Fid=303
A Twinkling, Glowing Snowman Light!
18" Fiber-Optic Snowman:
http://www.smarthome.com/c0128.html
Bil-Lite Fiber Optic Attachment:
http://www.asseenontv.com/prod-pages/bil-light_sul_fiber_optic_attachment.html?gid=ELECTRONICS
"...Fibre Optics, transmit light from one end of the optic to the other.
They are perfect when the use of electricity is deemed unsuitable as
there is no electricity present in the optic. Available in a number of
guises, fibre optics are the safest way to introduce light at low leve...":
http://www.thesensorycompany.co.uk/catalog/productslist.aspx?CategoryID=8&selection=7
http://www.fiberstars.com/
http://www.fiberstars.com/cl/about/clAbout.htm
mvh/Glenn