FRESNEL LENS plus additional optical secondary magnifying glass

[klj2503]

What music is that ?

Good videos you make

Thanks

[MrBrownstick]

Love you videos it's really cool interesting and educational stuff just wondering how do fund all these projects must be very expensive

[gabielroy]

i tawt the same thing than youn but the test prove other wise glad of your failure hope sucess in a near future(THIS IS SCIENCE AT TRUTH FORM)

[kishbud]

Dan great set up, I've done what you are trying. Here's whats happening with your setup. Your second lens has a flat surface facing back toward the Fresnel, so thats reflecting about 20% of your total light transmission, you have to use coated optics also known as Anti-reflective coatings MgF2, it's the same coating they put on good camera lenses, that blue-green Hugh on the lens. That will give you about 98% total light transmission. By design the Fresnel has about a 20% loss vs a clear lens.

[TheLonelyImmortal]

Why don't we see Denise anymore?

[gjholcomb]

didnt mean a laser,i was just being funny.just wondered if you could bounce the fresnel light around the yard and maintain the strength of the focused light with an everyday mirror.

[gjholcomb]

didnt mean a laser,i was just being funny.just wondered if you could bounce the fresnel light around the yard and maintain the strength of the focused light with an everyday mirror.

[TepochaTe]

would you be my father? i really love all the stuff you do!

[truvak]

man, i doesn´t make any sense! this morning I took an advance physics book just to ask you the very same question: what if a magnifying glass... there has to be a way, doesn´t feel far fetched.

[farmingmanosss]

Dan is Denniez pregnant ? or just ate before the video ?

If She is pregnant congratulations...

Sorry if I misspelled Her name

Good video as always.

[farmingmanosss]

Dan is Denniez pregnant ? or just ate before the video ?

If She is pregnant congratulations...

Sorry if I misspelled Her name

Good video as always.

[btwicked]

You're a cool guy Dan.

what happens if you put a Parabolic reflector at the appropriate point of the straying side of the focal point generated by the fresnel lens like this

fresel|>.<|Parabolic reflector

so to create solar feedback reflector, so maybe all the light that misses the target hits the Parabolic reflector and bounces back to focus on the opposite side of your target.

[inspacedependence]

Dan, where can I contact you?

[GREENPOWERSCIENCE]

@inspacedependence GREENPOWERSCIENCE1YAHOO or message through youtube

[GREENPOWERSCIENCE]

@inspacedependence  message through youtube

[inspacedependence]

@GREENPOWERSCIENCE I did, a couple of days ago. :-)

[rainbowsalads]

those paintings are awesome too. very life like.

[rainbowsalads]

the typing and all sound effects are cool.

[jmosler9]

the typing and its sound effect are lame.

[jmosler9]

the teyping and its sound effect are lame. 

[xjen7]

Great video!

[xjen7]

Great video!

[DiyEcoProjects]

wow mate, love both your art. Perhaps you could do a youtube on them someday lol... bold colours. Lense stuff: I think whats happening is that whilst the light travels through the glass its getting diminished by the glass itself. I think its dividing the light from the fresnel lense somehow. Also the lense may be widening the light through it, thus cooling the end result down. dont know, but its great to watch your experiments. have fun, k

[gjholcomb]

have you ever tried to take focused light from the fresnel lense and bounce it around the yard with a mirror and burn things farther away like a make shift solar laser?

[GREENPOWERSCIENCE]

@gjholcomb The focal point is set, mirrors add to the distance so you would not get a laser, it would be spread very wide like a wide angle light. A flat mirror alone would provide a better beam.

[jbrun009]

@gjholcomb It should be possible with a dish I would think. At the focal point would be a small mirror with less of a curve than the dish, there would have to be a hole in the center of the dish, but it should be possible to create a solar laser. Just wish I had a dish to try it out

[Knight3191]

Magnets? damn...

[JehuMcSpooran]

Interesting vid. I was thinking of doing the same with my lenses. Though I'm a bit worried about your figure of 50% reduction in power. I have a funny feeling that your secondary lens is not positioned right. Try mesuring the reverse focal point of the secondary lens and place that at the focal point of the main lense. It should expand but collumate the light. you could then do it again to make a super thin beam. A light bench program should help

[SouthNJPC]

@JehuMcSpooran

Yea i agree. One thing i was thinking with the fresnel lens it makes the focal point "pyrimid" shaped. right? And when we were kids burning stuff with a magnifying glass the sun was coming in straight. I am not sure if with the focal point hitting the 2nd lens if the light is "straight" enough. There is a lens out there, if not, you could make one. So i dont think its a matter of this concept not working at all, just finding the right lens.

[JehuMcSpooran]

@SouthNJPC Yeah, depending on the type of lens. Really you need 2 extra lenses to focus it down properly. The first corrective lens with it's entry focal point at the focal point of the fresnel. This will then collumate the light into a straight beam. The second lens can then focus the beam into an even tighter focal point. Depending on the focal length of the second lens, the spot should let you burn without finding the exact focal point due to the angle of the beam. Gymble mounts help too.

[SouthNJPC]

@JehuMcSpooran

Yup, i hope he sees these comments and builds a sun laser!

[BooGooNFlowoo4Evoo]

If someone had a hobby telescope they didn't care about, I wonder how the output would compare to the Fresnel lens. The telescope is very highly calibrated to magnify light. I've looked in vain for a YouTube vid I saw once that showed someone use a telescope to melt metal... I forgot to bookmark it.

[GREENPOWERSCIENCE]

@zenloki420

/watch?v=wyXsYkumHcw&feature=r­elated

[purplemutantas]

Wow both you and Denise are very good artists. I am good at photography, but I stuck at painting or drawing.

Thanks for the demo with the second lens. Good to know that a second lens doesn't help at all.

[liveuk]

People this is amazing fun and we all do it for fun be careful with this.

I found after years of doing this in different ways physics says 1000 watts of power per 1 meter ish of sun so the area size you first collect from is the power you get bringing it to a point gives you all this power in one spot as you see by Dans vid so collect from 2 meters or 4 meters if you want to weld use mirrors or dishes to direct more sunlight to the lens.

[DanTheHippieWolf]

Wow, awesome footage! I bet you could that to weld quite effectively

[scotsmanlerxt]

I liked seeing some of your home along with your usual topics. Thanks for sharing.

[ckeilah]

You need to get an HDR video camera! ;-)

Also, doesn't the fresnel already reduce its gathered light to a focal point? The only benefit of a secondary would be if you can't already get a point from the primary. Read up on lens theory to learn how to build effective compound lenses.

Great work! Thanks for sharing. :-)

[FireDropTechnologies]

That high carbon bolt did melt, you could weld soft steel with it, like some sheat metal or some damaged 1/16th steel with a metal coat hanger for the welding rod.

[FireDropTechnologies]

I mean think about it the Focal point of your flash boiler was litteraly red hot in only a few moments. if that could be focused in to the mag lenz? and consentrated?

[FireDropTechnologies]

What about useing the lenz you where heating your flash steam experiment with and coupling it with the lenz? That parobolic was heating highpressure steel red oht pretty fast.

[FireDropTechnologies]

The other thing that uccurs to me is if this lenz now has a three times smaller focal point? it is consentraighting three times the energy in too that area. What about keeping your lenz as it is but useing say? three or four Mirrors to shift the light in to it, and then by so doing focus three times the solar energy in to a three times smaller area?

[imatelly]

step it down again add another and another make the beem smaller and more powerfull

[FireDropTechnologies]

Ok, next opption?

will use of the magnifien lenz work with a parabolic mirror?

[FireDropTechnologies]

Ok, next opption?

will use of the magnifien lanze work with a parabolic mirror?

[flownder28]

The eye painting looks like Milla Jovovich

[SouthNJPC]

What the hell Dan, you are a painter as well as a mad scientist?? Awesome... Can i come live in your backyard?

[skylos]

What is the equations of the various lenses describing their curvatures? It seems as if we generally grind and shape lenses to focus parallel light. When you intercept a beam that is already been angled for focus, I think the secondary 'expected curvature' lense will focus it along a line - the outer rings focusing closer than the inner rings, or vice versa.

[davidlightsnack]

nice paintings



[markallen200]

Are you capturing all of the focused energy from the Fresnel lens? It looks like you may get better results if the optical lens were bigger or a smaller Fresnel lens would be more dynamic with the demonstrated optical lens. Or, perhaps the intensity would increase if you had a fine adjustment for the optical lens. Maybe an inch closer or an inch further would make some difference.  Cool experiment! No need to be so down about good data!!

[davidlightsnack]

I wonder if it might work better if you used a concave lens the light turn into a parallel beam and then shone it through the convex lens. It seems like it might do the same thing as a convex lens with regular sunlight, the only difference is you'd be sending concentrated sunlight through it. I would like to see the results of that. How did you get the bolt to melt at 3:20?

[icccmdave1a]

awesome, no other word works.