Instructables

WANTED!! large frensal lenses, parabolic lenses(concave), and projection TV's

i need some parabolic lenses, frensal lenses, and projection TV's to make a death ray from thanks

Eye Poker2 years ago
Check out greenpoweredscience. They have what ya need.

http://greenpowerscience.com/SHOPHOME.html
Ev2 years ago
A few thoughts....
I have a 3' x 4' fresnel lens. Got it from a TV repair shop for a few bucks. Try CraigsList under FREE. People give away their rear projection sets. Be prepared to dispose of the remaining cabinet. The lens of the projector tube may be useful to bend the light, but will overheat quickly. Use a gardener's spray bottle to see the converging light rays. They diverge right after the focal point, so a flat mirror will only change the direction of diverging rays. Glass light fiber will capture the concentrated light. There are building lighting systems that use the technique. Unknown if the heat energy is lost bouncing around the fibers. Solartubes are 12" diameter mirrored tubes that move sunlight light from the roof into dark hallways. Have fun! I haul my lens out several times a year to burn holes through bottle caps and melt a few pennies. Protect your eyes, don't leave it unattended. Oh, Green Energy on YouTube has a bunch of videos of solar death rays.
Kiteman3 years ago
Scrounge around for retired overhead projectors, which have a large Fresnel lens and one or two decent glass lenses in them.

nurdee1 Kiteman2 years ago
Any ideas of were to find old overhead projectors for free.
Kiteman nurdee12 years ago
Any local school might have them left in storage after switching to digital projectors.
ostomesto (author)  Kiteman3 years ago
BRILLIENT!!
bonjour je cherche un génie pour construire robot
ostomesto (author)  Izee_guerre_etoile3 years ago
pourquoi avez-vous dit "bonjour je cherche un génie pour construire robot"

J'ai utilisé Google Translate haha

i used google translate to talk to frenchie here haha
caitlinsdad3 years ago
I'll throw in some big mirrors and put in a recommendation for the Darwin Award.
ostomesto (author)  caitlinsdad3 years ago
Huh? ( confused look on face)
You won't get far in your evil plan for world domination with that answer.
1. You must lure or coerce the best scientists in the world to come up with a design for your death ray. Have evil henchmen or women build it for you.
2. You need to secretly source or fabricate all of the parts of the death ray without letting anyone know or suspect that you are building a death ray, let alone announce such a plan when it is not even finished giving the opportunity for the forces or good to thwart your evil plan.
3. Basic principles of physiks require you to get the most concentrated sunlight into an extremely focused spot. Hence, the mirrors or else you need a to have a bag of diamonds to fool around with.
4. Always good to be nice and end your request with thanks.

wait...was this for fun or were you really planning on world domination, or just something to annoy your neighbor?
ostomesto (author)  caitlinsdad3 years ago
Haha sorry no world take over. This was just for fun and yes I was serious. I want to be able to burn wood and stuff like that in an instant. Any ideas? Thanks
Liquid O2 and a match? Wait....better include a fuse and a good pair of running shoes.
ostomesto (author)  RabidAlien3 years ago
hahahahahaha, funny