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Old 09-04-2008, 04:06 PM #1
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Default how to project a grid ?

Hello,

Does anyone knows here how to project a grid, I mean a line-grid (like EVE in Wall-e, if you saw the movie), not a dot-grid (like with those widely available diffraction grating). Any idea, combination of optics, or.. ?

Thanks


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Old 09-05-2008, 12:00 PM #2
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Default Re: how to project a grid ?

How about many line generators side by side paralleled to each other, then another many line generators perpendicular to the first ones?

It could be a b!tch to set up though...
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Old 09-05-2008, 03:47 PM #3
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Default Re: how to project a grid ?

how about 1 dot grid grating followed by a crosshair grating.. BAM! grid
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Old 09-06-2008, 04:49 AM #4
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Default Re: how to project a grid ?

I've got a few. They sometimes come with the dollar pointers. it's a simple 4x4 box grid. I'll load a picture later tonight.
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Old 09-06-2008, 08:25 AM #5
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Default Re: how to project a grid ?

keeperx: yes you're right, I was thinking of using that solution too

cyparagon: ah, I'm pretty much interested ! looking forward for a picture...
any idea where I could get thoses cheap accessories (online) ?
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Old 09-06-2008, 01:47 PM #6
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Default Re: how to project a grid ?

ebay
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Old 09-06-2008, 03:05 PM #7
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Default Re: how to project a grid ?

^The constructivity of that post is simply breath-taking. Do you always put that much time and effort in to your posts?


As the wavelength increases, so does the angle of diffraction. All images were taken with lasers at ~10 feet.








And a Bonus:


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Old 09-06-2008, 03:33 PM #8
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Default Re: how to project a grid ?

haha man, I'm from Paris but didn't heard about this terrible turtle execution
thanks a lot for the photos, I see you have a wide range of lasers...
I didn't figure though how to get thoses cheap grid lens, ebay only sell line and cross lens currently...
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Old 09-06-2008, 09:34 PM #9
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Default Re: how to project a grid ?

At the dollar or variety store, you might find "Hi-Power 5mw laser keychain with 100 pattern heads" .
That's how I got a whole bunch of these patterns. Cheap, too.

Cyparagon - Nice photos!!!
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Old 09-07-2008, 01:38 AM #10
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Default Re: how to project a grid ?

^what he said. 3 out of my 100 or so are grids. Unless you want to spend $50, you'd probably want to purchase 20-50 heads for a good chance at getting one.

These are what you want.
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Old 09-07-2008, 08:32 AM #11
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Default Re: how to project a grid ?

billg519, Cyparagon... a lot of thanks to you !
have you seen any other grid pattern in thoses set, or is the 4x4 grid the only one ?
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Old 09-11-2008, 03:26 PM #12
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Default Re: how to project a grid ?

You can use any cross generating laser and a diffraction grating to create a very large grid with many rows. Ex. A Brightline cross gen from Lasaerglow and a megamatrix diffraction grating from novalasers will get you a solid grid pattern with dozens of rows and columns made of clear, focusable lines.
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