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ArcticMyst Security by Avery

big burner

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laserlover

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ok, i know this doesn't involve lasers but it is pretty neat!
today i built a fresnel lens magnifying glass that has a diameter of 7 inches! it can start a fire on the opposite side of a match in about 2-3 seconds, anyway here are the pics!

P8220101.jpg


P8220103.jpg


(the chapstick is for size reference)
 





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laserlover

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thanks, i really tried hard to make it look nice and very functional, now only if i had a laser warning sticker that reads "danger! do not look into aperature, avoid direct exposure, 1+ watts of full spectrum light!!!"
 
jamilm9

jamilm9

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i have one that is 8 by 11 inch.It $100 on ebay for 40 inch ones.but then there shipping.
 
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laserlover

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jamilm9 said:
i have one that is 8 by 11 inch.It $100 on ebay for 40 inch ones.but then there shipping.
Click to expand...

mine was 8x11 until i cut it into a circle for this project, this way it is easier to focus
 
Cyparagon

Cyparagon

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Find an old projector TV at your nearest junk yard. 60" Fresnels for everyone!
 
Switch

Switch

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So wait....
it can start a fire on the opposite side of a match in about 2-3 seconds
Click to expand...

It can start a fire with the light from a match or what? :-?
 
diachi

diachi

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I have a Fresnel lens thats over 12" across :cool: And man can it burn !

Although your little portable one seems great, good work :p
 
Benm

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The whole magnifier look is nice... i bet it scares any ant to death before you get a chance to actually toast it ;p
 
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laserlover

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Switch said:
So wait....
it can start a fire on the opposite side of a match in about 2-3 seconds
Click to expand...

It can start a fire with the light from a match or what? :-?
Click to expand...

no, if i focus the light from the sun i can light the plain wood side of a match in 2-3 seconds
 
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