FRESNEL LENS Flat mirror 250 ft target REDIRECTING SUNLIGHT FOR SOLAR HEATING

[DanialMcCoy]

Could this be used to direct multiple Fresnel lenses onto a single target? Like a crucible with a main lens on it and one or two secondary lenses using mirrors?

[caneywaney]

Now here's a question. could you do the reverse? in other words, collect the sun in the fresnel lens, directed onto a mirror and redirected to a target? imagine cooking the Talaban with all the sunlight they have over there in Afganistan or Iraq? Sunlight into Fresnel lens onto mirror. easy

[GREENPOWERSCIENCE]

@caneywaney Does not work that way,the focal point expands, lens to mirror just bounces. Your target would need to be 20 inches away.

[caneywaney]

@GREENPOWERSCIENCE I did do it once though. I used a small fresnel lens (sze of a notebook piece of paper) and collected the sunlight through that. Then placed a mirror at the focal point of the lens, bounced the collected light from the mirror to a piece of wood and it started smoking. So I went from sun, to frensel lens to mirror to wood. On what scale could this be reproduced?

[GREENPOWERSCIENCE]

@caneywaney watch?v=xDr7uX53Uy8

[caneywaney]

@caneywaney Thats what I'm getting at. I wouldn't pass this along to too many. some could get creativly distructive

[PHANTOMSLAYER777]

Hey I was wondering if this might work to generate heating air . I envision some kind of drum with a vent, then having the lens heat that, and run a hose into the porch of my house in the winter. I would have a small electric far on the hose end on my porch sucking the hot air in. Your thoughts. trying to get cheap heat.

[narcovice]

i did this at home my brother held the mirror and i got the lens in front of the mirror but couldentvideo tape it but have one on how to coook go look at my video on youtube

[dickmoe99]

hello

[Cyberdactyl]

Dan, that is somewhat misleading saying 'optically good mirror'. First of all, I assume that's a second surface mirror. Saying 'optically' generally means it can be used as a secondary flat mirror, such as in a Newtonian. I would be will to bet a few bucks that mirror is no where near being 1/4 wavelength correct.

[Theskidmark61]

Great educational piece of work!

[GREENPOWERSCIENCE]

@Theskidmark61 Thank you:-)

[red7media]

Only problem is we loose the sun it's over.

[intheshitter]

@red7media The sun will be around for another 5 Billion years or something or did you mean when the sunsets? That wont be a problem as it would be very easy to have backup batteries that are also being charged during the day.

[jawbraeka]

Hey Dan,

Try this, try heating a tin of water using this process...

[UnoRaza]

What mirror? I did not see a mirror? ;)

The trick of tracking the sun with a mirror to keep it aimed is not expensive?

Otherwise this would seem like a great way of redirecting energy.

[thejesters1975]

Cool experiment!

[SayNo2ClosedMinds]

We should not be surprised that the sunlight is still effective 250ft from a mirror, after all it has just travelled over 90 million miles before it hit the mirror. That said it is still worthwhile looking at this as it shows how even shaded areas can receive sunlight for solar panels etc. Excellent demonstration.

[KayakFisher01]

Why not redirect the concentrated light after it hits the Fresnel Lens? So it would act more like a lazer pointer. Burn baby Burn.

[basilenglish]

can you use optic fibres with a fresnel lense to take heat into the house?

[odius94]

I really like your new closing music. Much better than the old one!

[AdeptAlbatross]

Loved the slow mo of the fly almost getting zapped. "holy sh*t, my ass is on fire..move, move....."

[GreasedMunky]

so what happens when u concentrate 5 of those things on one spot

[343HFD]

@AlexGrim, hey bud srry I was in a bad mood when I posted that. I am accually all for this kinda research because sooner or later we ARE going to need it! Sorry again!! :):)

Be safe

Kp

[C24B9]

@343HFD Thanks for posting that. Need more of that sort of peace-keeping in this world. And, yeah, there's nothing wrong with being a tree-huggin, rock-lickin, dirt-worshippin' eco-weenie, is there? (And don't worry...I've been called worse than that!)

Peace, Love & Eternal Grooviness

[343HFD]

@C24B9 sure no problemo :D

[SUPERPHANTAZM]

Why would you want to profile Dan Rojas?

[AlexGrim]

I hope people understand why you demonstrated this using reflected sunlight. Show how good it works off a solartube next. If ya can? They ain't cheap.

[SurvivalWithBushcraf]

This reminds me of Arcemedies death ray.  but on the other hand this is awesome thinking outside the box. You need funding for these projects. You could change the world.

[Snapshotok2000]

Was the round circular Fresnel lens cut from one of your larger square lens ?

[WORRO01]

very very cool,, great video, and thumbs UP!

[johnny102marvin]

I have purchased two fresnel lens from you on E-bay. These are great tools to cook food using solar energy for a situation where the SHTF. I keep the small one in my back pack. It is 12 inches by 12 inches. It probably won't cook food in a cooker, but it should be able to start a fire using good tender. The big monster one I bought from you should cook a pot full of pinto beans easily.

[Anothercoilgun]

Archimedes would be proud.

[youngn420]

oh wow everytime you have said your name before i always thought it was a nick name meaning RoHS compliant..its really rojas ;p lol@me

[343HFD]

Treeeee huggerrrrr

[AlexGrim]

@343HFD Dan is working with the concepts that can make plenty of fresh water for everybody and end our energy problems. Not run of the mill tree hugger stuff about solar panels and windmills. He covers the standard stuff too, but he goes beyond that. If you had any experience with this stuff, you'd realise how stupid you are for labelling him a simple tree hugger.

[kdkinen]

you're just so awesome man, thankyou for all you go through. you have certainly done your job for humanity

[toamaori]

What effect would more mirrors have? I wonder if they would reach the same focal point

[IdahoViewing]

@toamaori I don't see why they would not.

[TaylorHolmes]

i think you just ran out of ideas for things to do with a fresnel lens, dan. That, or you ran out of money to spend on your super-awesome ideas.

[3aby]

hey there, is someone able to tell write me his first Words ??

PLS write me a private massage!!

thanks a lot

btw: great video =)

[aerobique]

SUN

[PsyogiBottoms]

This looks like a the start of a great Light Saber to use against the Evil empire.

I'll mount some on the top of the Jedi temple to vaporize any threat! Excellent work. ;>)

[PostSurgeOperative]

Sweet slo-mo of the fly.

I love your experiments and your demonstrations of the capabilities of these various technologies, especially when you combine one or more of them to show their real potential as integrated systems. Plus, your presentation of the low-tech and the high-tech is especially unique here on YouTube, and for that you deserve greater recognition.

Please: keep up the good work!

[andruha11234]

vids are getting lame.... nuf said

[localbroadcast]

get on with some more realistic energy saving devices!!!! enough with the mirrors and fresnel lenz crap!

[AcidRaZor]

I enjoy your videos a lot, but I think it's time you started with a "How To: Setup your own solar panel system to power your house"

You can have it in several step by step parts etc, and it would be awesome to see because most videos I found on here doesn't really explain everything in detail.

[MorganOthelloLafay]

amazing wer you get the Fresnel lens ?

% Stars

[GetMeThere1]

Archimedes would have loved it!

[TheVampirella]

Another excellent video!

[ElDoctorJanItor]

This is awesome. High five.

[ricochetVendetta]

lol deathray on the fly

[cdltpx]

Dan please look at the videos on AQUAPONICS some buy a kit others just repourpose old pools and food grade barrels to grow plants and edible fish. Long term cost what ever you feed the fish and the cost to power the pump. Knowing you I would think you would build a system that ran on solar. This seeme to be ideal for a hands on man like you.

[web4deb]

@cdltpx funny you should mention aquaponics. I've been debating installing some solar panels on my system. You can view it on my channel on web4deb.

[bakerrv]

That is amazing, 250 feet away! How far away is the Sun? Just could not resist! LOL

[fireworkgalore]

@bakerrv about 93 million miles

[matrixm777]

Very nice...

[599891]

Pretty cool Dan, it might be interesting to use the mirror on one of your solar panels at that distance and compare the results against direct sunlight and maybe try the fresnel lens too.

[sonyxploder]

@599891 Wouldn't a fresnel lense be a bad idea as it would concentrate on a single spot on the solar panel and possibly cause damage?

[599891]

@sonyxploder Probably yes if you concentrated it to a point, I would be more interested what it would do with just the mirror re-directing the sunlight to a solar panel in the shade compared to on in direct sunlight.