jamilm9
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wheres the cheapest place for a lens that ships to canada that is at least 40"by 40"
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Sun + Magnifying Glass = ?mw
- Thread starter caleb
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jamilm9
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no they aren't crt tv's they are called projection tv.
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i built a fresnel lens magnifying glass today, i cut out a 7 inch diameter circle and i taped a handle to a metal ring and then i glued the lens to the ring and viola, i had a burner that can ignite matches in less than 2 seconds, oh and by the way, that is the opposite end of course! i will post some picture of it in the multimedia section later! the thread will be called "big burner"
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There's a lot of energy in sunlight. Around 1000 watts per square meter on a bright day.
Years ago Edmund scientific sold a a giant fresnel lens, over a couple feet square. It was sold as 'melting asphalt in seconds'. Unfortunately my parents banned the idea.
I did find this one, 11" square. That's still about 78 watts of power (78,000 mW).
http://scientificsonline.com/product.asp_Q_pn_E_3052833
Years ago Edmund scientific sold a a giant fresnel lens, over a couple feet square. It was sold as 'melting asphalt in seconds'. Unfortunately my parents banned the idea.
I did find this one, 11" square. That's still about 78 watts of power (78,000 mW).
http://scientificsonline.com/product.asp_Q_pn_E_3052833
jamilm9
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how does a projection tv look like.
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like this
or this
or this
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jamilm9 said:
Google is your friend! use him
I'll have to dig out my old 42" RPTV fresnel and see what I can make it do ;D
I'll get some videos if I can find a suitable filter for in front of my digital camera..I don't want to mess up the sensor in it LOL. I probably will wear 2 pair of sunglasses to help protect my eyes in the process....
I'll get some videos if I can find a suitable filter for in front of my digital camera..I don't want to mess up the sensor in it LOL. I probably will wear 2 pair of sunglasses to help protect my eyes in the process....
jamilm9
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artix
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;D Cool! What is the price for the one in the picture?jamilm9 said:
jamilm9
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i asked no reply.
jamilm9
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i went to a tv repair shop and got a free one.its 32inch by 45 inch.
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Post your pictures [highlight][move]NOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![/move][/highlight]jamilm9 said:
jamilm9
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jamilm9
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