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How can the Laser Light go around corners?


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#1 of 23 OFFLINE   Rob Speicher

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Posted July 14 2004 - 03:56 AM

So I'm sure most people have seen the infomercials for the Laser Level that you stick on a wall to help you hang pictures, or whatever. Towards the end of the commercial they say its beam even goes around corners. Anyone have one? How can a laser beam go around a corner without a mirror?

Edit: It's called the Laser Level, not Laser Light :b

This story says it can only go "around" inside corners, not outside corners which makes sense. But I'm pretty sure I remember the commercial showing it around an outside corner because there was a lightswitch on each side.


#2 of 23 OFFLINE   Nathan*W

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Posted July 14 2004 - 04:08 AM

With a mirror?
 

#3 of 23 OFFLINE   JimmyM

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Posted July 14 2004 - 04:42 AM

There's fine print at the bottom of the ad that says you have to aim it directly at the corner. So, basically, it's splitting the laser beam and sending it in both directions.

#4 of 23 OFFLINE   Danny Tse

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Posted July 14 2004 - 06:57 AM

Rob,

I have been wondering about that too.
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#5 of 23 OFFLINE   Kevin_Spradley

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Posted July 14 2004 - 07:11 AM

Do you have a link to a product description page? I would like to read about it, my coworkers and myself were disscussing this the other day. We can see how it can appear to go "around" and inside corner (due to the divergence of the Laser Diode beam), but we do not see how it can even claim to go around outside corner. I would just like a page where I can read the products statements and see if they have examples.


Is this the same Laser Level that touts "the latest refractive lens technology?" All the lenses I have ever dealt with are refractive. That would like saying "the latest reflective mirror technology"

#6 of 23 OFFLINE   Brian W. Ralston

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Posted July 14 2004 - 08:36 AM

JimmyM already gave the answer guys. In the commercial, they are pointing it straight at the corner from behind the camera. The laser is hitting the all corner and splitting in both directions.

Not a practicle use of the laser in my opinion.
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#7 of 23 OFFLINE   Lee L

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Posted July 14 2004 - 11:35 AM

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Not a practicle use of the laser in my opinion.


I beg to differ. Every office building built in the last 10-15 years has had a beefer version of more or less that same thing used to install the ceiling grid level. Lasers are used to dig footings to uniform depth, serve as a reference point for large scale earthwork (ever see a device on a tripod connected to a car battery near heavy equipment?), used to run large plumbing and storm drainage pipes and many other things. Basically anything in construction that depends on finding a level line across any distance over 6 feet uses lasers of some kind most of the time now. Go to http://www.davidwhite.com and click on construction lasers.

Then, think of adding a precision GPS receiver (one that is much more precise than anything you can buy in most stores) to a laser and the possibilities are mind boggling http://www.trimble.c...struction.shtml Oh yeah, you can hook this stuff to a bulldozer.
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#8 of 23 OFFLINE   Rob Speicher

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Posted July 14 2004 - 03:38 PM

This is it: https://www.asseenon....raight/115526/

#9 of 23 OFFLINE   Dennis Nicholls

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Posted July 14 2004 - 05:09 PM

Well it is well-known that light is bent by a gravitational field. So what the makers of the levels have done is include a few small black-holes in the kit. Wearing safety gloves, you move the black-holes into position near the corners you wish the light to bend at.
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#10 of 23 OFFLINE   Gregg Shiu

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Posted July 14 2004 - 05:09 PM

Lee's correct, whenever I've seen construction guys in our flooring company lay down underlayment or prepping for tiles, or backsplash which is a good amount in length, these lil laser devices are invaluable. However, never bothered to read the fine print on the ads. What a shame, and here I was thinking for 20 bucks I would be buying some sorta magic laser device.
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#11 of 23 OFFLINE   Brian W. Ralston

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Posted July 14 2004 - 08:05 PM

Quote:
I beg to differ....


I wasn't talking about the use of the laser level in general. I think they are great to use and have one myself. I was referring to what all would have to be done to set the laser line level up to point exactly at the corner to get it to "bend around the corner." That seems to be more trouble than what it is worth.



Posted Image
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#12 of 23 OFFLINE   Kirk Gunn

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Posted July 14 2004 - 11:37 PM

Wearing safety gloves, you move the black-holes into position near the corners you wish the light to bend at.


These are the same gloves you get with the Ron Popeill's rotisserie oven ! Quite handy... Use them for cooking, laser levelling, even with my Thighmaster and Pocket Fisherman ! I am now making 1,587 easy monthly payments of $19.99. Gawd, I love cable !!!!!

#13 of 23 OFFLINE   Cees Alons

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Posted July 15 2004 - 01:11 AM

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These are the same gloves you get with the Ron Popeill's rotisserie oven !
No, no. Those are regular gloves. The ones Dennis referred to have an anti-matter coating.


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#14 of 23 OFFLINE   Bryan X

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Posted July 15 2004 - 10:17 AM

You guys have it ALL wrong. The laser uses a Salsa/Silica combination to go around corners. What you do is fill the laser level with a small quantity of salsa and then place a piece of Silica around the corner out of the laser's sight. The 'Salsa laced' beam then shoots out of the laser level and seeks out the Silica, going around inside and outside corners in the process.

#15 of 23 OFFLINE   BrianW

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Posted July 15 2004 - 10:41 AM

Stochastically synchronized quantum pulse modulators.


Duh!
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#16 of 23 OFFLINE   Chris

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Posted July 15 2004 - 12:29 PM

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No, no. Those are regular gloves. The ones Dennis referred to have an anti-matter coating.

I am very sure that these are the very same gloves that come with the gutter flush buster cleaning kit.
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#17 of 23 OFFLINE   Cees Alons

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Posted July 15 2004 - 07:13 PM

Odd. In that case they cannot handle black holes.
Perhaps this device is based on an Enhanced Heisenberg Uncertainty (EHU). As a result of Heisenberg's laws some minor part of the laser light will always travel around a corner. By carefully enhancing this effect, increasing the relative certainty, more particles will take the route around the corner.

This also means that, when a cat is sitting around the corner, nothing happens until a human observer watches the laser light, in which case the cat will instantaneously be dead.


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#18 of 23 OFFLINE   Lee L

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Posted July 16 2004 - 03:45 AM

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#19 of 23 OFFLINE   DaveF

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Posted July 16 2004 - 04:27 AM

Quote:
Is this the same Laser Level that touts "the latest refractive lens technology?"
It could have been a diffractive lens or a GRIN lens (which is still refractive). And the refractive lens could be glass or plastic, spherical or aspheric.

But yes, "refractive" in that context is likely just to make it sound more high-tech, and thus more attractive to the optically illiterate.

#20 of 23 OFFLINE   Mark Shannon

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Posted July 16 2004 - 08:42 AM

Why not just get This one, and you don't have to worry about it bending around corners.


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