Instructables
Picture of Laser Pumpkin
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This is a quick tutorial showing how you can create a Laser Pumpkin.

The idea for this project came from last year's article entitled "Jack-O-Laser of Doom" which involved creating a Jack-O-Lantern with a Laser Vortex projecting from the mouth and eyes. Our pumpkin was very similar, but instead we used a couple of our laser accessories to create a unique Jack-O-Lantern. This project would be great for parties and dance clubs, as well as your front porch.

The equipment you will need will be a laser with continuous operation, diffraction gratings, a pumpkin, and something that will create fog or smoke.

Step 1: Carve a Jack-O-Lantern

Picture of Carve a Jack-O-Lantern
Everyone knows how to do this step, it's easy. Scoop out your pumpkin guts, and carve out a scary face. Keep in mind when designing your Jack-O-Lantern how you would like the laser beams to project out of the eyes, nose and mouth. The best pumpkins for this will have large mouths and eyes.

Step 2: Attach a Diffraction Grating to your Laser.

Picture of Attach a Diffraction Grating to your Laser.
We borrowed lasers from our partner Laserglow.com as they have an assortment of laboratory and alignment lasers in various colours and powers. If you don't have access to a stationary laser, a handheld laser with a higher power output will be effective. You will need to tape down the button if it does not have the ability for continuous operation. For this project we chose a blue, green and a red laser, although any colour will work; more colours will create a cooler Laser Pumpkin.

Attach a Diffraction Grating to each laser to create a scattered beam effect; the more beams, the better the effect. We used electrical tape to hold the Diffraction Grating holder to the laser. Diffraction Gratings that split a single laser beam into many beams including the Matrix, the Double Matrix and the Mega Matrix will be the best for this project, and they are available from Novalasers.com in the Optics section.

 
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vishalapr3 years ago
That is totally awesome! Unfortunately I don't have any lasers... :(
rimma4 years ago
this is great!
lazorz go pew pew!
:D
 now they dont, they go: jew! jew! (no religion pun intended)
dave234 years ago
cool mannn.lol lol
hi dave...
have any ideas for instructables?? 
al95955 years ago
cool lolz
Xellers6 years ago
Where can I cheaply get a laser that can produce a visible beam? Can I somehow overpower a regular laser pointer to achieve a visible beam? Are there any cheap devices such as wall alignment tools that I can get and then extract a laser out of? Please help.
damasta Xellers6 years ago
just blow some smoke, cheap smoke machines can be found online, but you can also buy some dry-ice and put it in a bowl of hot water
Xellers damasta6 years ago
I would do that if I were more interested in a Halloween effect, but right now, I'm bent on getting a laser that can at least project a dot that can be easily visible in moderate daylight, or a laser that projects a visible beam...
If you're not in the US or Australia, http://www.dealextreme.com/details.dx/sku.469~r.25675451 will be perfect. Cheap as nuts too.
Visible dot in daylight, visible beam at night. It's great. I've had several (bought more for friends). And DX is indeed a good reputable site - lotsa great stuff, and they're great on returns if it's needed.
Totally agreed. I bought a 30mW laser and 100 magnets from them, perfect.
we are the professional manufacture of laser projector. you can browse our web site: http://www.able-laser.com/ .
And you can contact with us with E-mail, ablelaser@163.com

ScienceWiz5 years ago
WOW I was super surprised when I looked at all of the optics at NovaLasers! Most sites only have a couple diffraction gratings and usually charge an arm and a leg... Great Instructable!! Really cool idea!
fwjs285 years ago
good song choice :P
Sandisk1duo5 years ago
Where's the techno music?
stimps5 years ago
Thanks for the advertisement. =/
Cooshinator6 years ago
Two words: DANCE PARTY!!!
this makes me think of somthing IMMA CHARGEN MAH LAZER BLARGGGGGGGGGGGGGGGGGGGGGGG
Shoop Da Whoop.
Great idea, great instructable. I was wondering if you were to put mirrors on the sides of the pumpkin wouldn't you generate greater defraction..
Matt D6556 years ago
thats viscious.
npsark6 years ago
Amazing!! finally something useful i can do with my laser!!
mever6 years ago
This is major cool! Wondering the same thing as billbob though ... how powerful is the laser you used?
novalasers (author)  mever6 years ago
For this project I think the green was around 20mW, the red was only a 5mW and the blue was a 50mW. But we didn't put the power ranges in this Instructable simply because power is not a major concern for this project, you can use very low powered lasers and it will still look amazing. But for all the laser fans out there, I know you guys like to know the power outputs, so I apologize for leaving them out. :)
I tried this with a 125 mW green laser! :D It looked SO cool! but stupidly I kinda forgot about my neighbors who got all freaked out because they saw a bunch of little green dots on their wall.
Cool, nice to know... Awesome instructable
Blue lasers? That's some pretty expensive tech inside that pumpkin... blueray technology costs thousands of dollars, even for a low-power stationary laser.
its green ray!

if you need a blue-ray prep a ps3 for organ doring see my post http://www.instructables.com/id/organ-donor-ing-in---eletcric-stuff!/
RockInBlack6 years ago
Coolest pumpkin I've ever seen.
novalasers (author) 6 years ago
We had to dispose on the pumpkin. Luckily for all you explosion fans, it went out with a bang. Watch the video.
BlueFusion6 years ago
Novalasers FTW! I buy from them. :D never had an under spec laser! always ~5 to 10mW over!
gwrober6 years ago
Very, very, cool!
X_D_3_M_16 years ago
wow
billbob6 years ago
how powerful are the lasers?
Ward_Nox6 years ago
WOW
those pictures look awesome!
Geoffrito6 years ago
this has got to be one of the coolest things i've seen. Good job!!
CameronSS6 years ago
Ahh!! Alien pumpkin!!! Run for your lives!!! Pretty darned cool.... ...wow...
nice :-)
canida6 years ago
That just looks awesome.