P2 FRESNEL LENS PARABOLIC MIRROR APERTURE SOLAR FRESNEL POWER CPV

[TheDestroyerofdoom]

thumbs up if you skipped most of it.

[gabigowriel]

where can that thick glass mirror "first mirror" be bought and for how much?

:-)

[kiwipk121]

I think bear should have one of these? =D

[jonasreinoso1]

you sold mirrow to telescopy?

[Yeuxvert]

Depending on the precise shape of the large telescope mirror, it is worth hundreds to thousands of dollars. If well made, the shape is precise to within 1/20th of a thousandth of a millimeter, over the entire diameter of the mirror. Unless you are going to never use it in a telescope again (which would be a shame), you should never touch the surface, and if you must touch it, wear clean soft cotton gloves. Sounds crazy, but the surface is so precisely shaped and smoothed that even fingerprints

[OKMUNWURX]

Thanks for sorting out mirror diameter vs focal length.  f=Fl/d

[DragonToko]

What is this video about? About little of everything?

[picaticatara]

SOS UN TROLAZO TE GUSTA EL PEDAZO

[calebp9503]

that large telescope mirror would have been used in a Schmidt-Cassegrain telescope, where the secondary mirror is what determines the focal length, not the primary, which is typically 10 times the diameter of the primary mirror. The focal length of the primary mirror such as that one is short because the secondary mirror will reflect the light back the same distance as the focal length of the primary, but at a much steeper angle, giving it high F ratios, yet making the telescope more compact.

[calebp9503]

oh my god, I want that big telescope mirror

[PRIVATEFBI]

Hi can you pls tell me how i can make a very cheap telescope mirror. Ryan South h Africa

[92BMW318is]

@Greenpowerscience

So what is it that you use these huge mirrors for?

Concentrating light on a solar panel?

[1955thekeeper]

Well, the guy IS pronouncing the name correctly. Fresnel (pronounced "fre-nel," the "s" is silent. Leave it to the French to come up with something like this. The Fresnel lens was originally designed to be used in lighthouses.

[rickm09]

is he actually wearing lipstick?

[ParaglidingManiac]

I think you meant to say "primary mirror" istead of "first mirror".

[ElectroOxim]

is he macgiver?

[hihosh1]

I have a question, could a lens like that be used in conjunction with a solar panel to gather more energy than using a solar panel the regular way? Would the solar panel be destroyed or would it generate more energy as the light is more concentrated?

[social3ngin33rin]

Where and how did you get that cool mirror :D also how much :)

[social3ngin33rin]

I don't think that is fair, that looks like a two piece telescope mirror. The large mirror that is. There should be a small mirror facing that big mirror shooting the light through the hole.

[Twinhit]

Hey!

I got one of those $14 telescopes!

Not too bad for looking at the moon for the price. IMHO those would make a decent inexpensive spotter apparatus.

[Jarathe]

I love your videos dude, but it's freSnel lens; not frenel lens.

[GREENPOWERSCIENCE]

@Jarathe :-) pronounced /freɪˈnɛl/ fray-NELL

[Jarathe]

fresnel |ˈfreznəl; frāˈnel| (also fresnel lens)

noun Photography

a flat lens made of a number of concentric rings, to reduce spherical aberration.

ORIGIN mid 19th cent.: named after A. J. Fresnel .

Sorry dude. Didn't mean to be an ass. I guess both are okay.

[cjmitz]

@GREENPOWERSCIENCE this deserves more than a thumbs up xD

[cjmitz]

@Jarathe ownd.

[bestamerica]

why NO closed captioned in here video

[blackle4ps3]

HOT makes COLD RV's use refrigerator,freezer that uses propane to heat something up and makes freezer cold solar air conditioner surfing for projects like this

[jpm1316]

7070 viewer

[mycatwilatackyou]

Thats a kick ass schmidt cassegrain I would make a very nice scope with that . Someone stold my Mead 10 " LX5 freaking thieves I hate them .

[ston932]

wtf ??? whre did you ge this hughe telescope mirrir and do you have any idea what such an miror is worth ? it hurts me to see it being used as an sun colector (i hope something is badly wrong with this mirror so it couldnt be used for an telescope anyway)

[GREENPOWERSCIENCE]

It is nearly perfect, there are some very very minor scuffs, I got all the finger prints off of it. This was for sale as a scrap item for $79:-)

[ston932]

0.o thahts awsome wehr did you get it ? probably you did the deal of yor life or this isnt actualy an real teleskope mirior (maybe it has some kind of an extrem destortion you wont even notice for such an use(telescope miriors have to be precicse to the scale of some nanometers))

[sunpaw]

@GREENPOWERSCIENCE

where can i get a parabolic mirror like you use for solar cooking...

i live in Canada but i need one very badly for an experiment I'm doing

[GREENPOWERSCIENCE]

@sunpaw check our website, there are links on the Fresnel Lens Page:-)

[sl9guitar]

@GREENPOWERSCIENCE where did u find that big of a mirror for 79 buks!!!??!??! a mirror like that goes for hundreds!

[Lashon3D]

That telescope mirror may have a short focal length but it is meant to be coupled with a convex secondary mirror which yields a long focal length in whats called the cassagrain design. The hole in the center is where the light goes after the light bounces aff the secondary and the image would be formed behind the main mirror. I'm guessing the mirror came from either a Meade or Celestron "Schmidt-Cassagrain" telescope. What a shame. These are excellent telescopes.

[GREENPOWERSCIENCE]

Thank you for the great information. I will add this in annotations. I figured that was what it was for. Thank you for all the info:-)

Kind Regards

Dan

[thinazzabird]

Maybe the stars won't go away Lashon3D.

[stopcraponutube]

Dan & Denise should have a science show on TV!

[GREENPOWERSCIENCE]

:-) Thank you for the nice comment and GREAT CHANNEL NAME btw.

[ayamejoy]

I'm a little jealous at the size of your lens. Juss saying. I can't find a page magnifyier, let alon esomething of that size

[donovancrenshaw]

y duz the mirror have a hole in the middle?

[WestCoastMods]

watched part 2 learning more Thanks!

Cheers

LazyMan@WCM

[kaje01]

I think the main point here is that it's not how focused you can get the light, but rather how much total light you can get to hit your panels. Maybe if you were using steam then it might be more important to have a hotter focal point.

Have you thought about going into business building these things for people and getting them off the grid? If you could install a setup like that for say $10k, you could finance over 5 years and the consumer would basically get it for free.

[hihosh1]

@kaje01 but surely you could make the panel smaller as the light would be concentrated thus meaning more light is hitting the panels in a smaller area than over a larger area?

[ThrasherAleX]

cool thanx man

[MajinFrahma]

That thing is massive.