Old 04-02-2010, 09:10 PM #1
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Default Portable Grid laser

Hi.

I am looking for a portable laser that can project a laser grid on floor or wall of size 5x5 meters.

The laser must be portable and preferable small. It must be able to run on batteries for several hours.

Can anyone direct me to some commercial products that fit this description.
Then I will be very thankful,

Best regards,

Thomas


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Old 04-03-2010, 01:03 AM #2
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Default Re: Portable Grid laser

I'm assuming you want the beams to be visible, right? Probably the most cost effective would be green, which appears to be brightest to our eyes.

Without the use of carefully placed mirrors, I'm not sure how this might be possible except with many lasers along two sides of the 5x5 area.

Even still, I'm guessing the price would be very expensive for it to be made in one "portable" container, probably at least $300+.
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Old 04-08-2010, 08:18 PM #3
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Default Re: Portable Grid laser

I can definitely provide a solution for this application. We've built these before. Email me: jhosaki@laserglow.com
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Old 04-08-2010, 08:37 PM #4
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Default Re: Portable Grid laser

50$ for this one, 635nm red


INDUSTRIAL LASER MODULE GRID (SQUARE) BEAM 5mW 3V 635nm - eBay (item 140106020267 end time Apr-23-10 12:22:57 PDT)
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Old 04-08-2010, 10:19 PM #5
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Default Re: Portable Grid laser

Diffraction-grating bases systems would be cheapest, but they only give that size grid at a given distance. I'd estimate at least 30 feet without the use of more fancy optics. Grid gratings can often (no guarantees - the selection is random) be found in these for $4.23 shipped, but you'd need to supply your own pointer or attach bigger batteries to the one included.

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Old 01-16-2012, 04:37 AM #6
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Default Re: Portable Grid laser

I know this is an old thread, but I wanted to toss in an idea on how this could be accomplished without an XY scanner.

This would require 2 lasers, or one laser with a 50/50 beam splitter

For one axis, pass the laser through a line generating optic or cylindrical lens like they use for laser levels.

The beam output from the line optic is then passed into a standard "dot" grid diffraction grating. This will produce multiple lines along one axis. Rotate the grating so that the grid pattern is along the same axis. I.E so that the minimum number of lines appears.

Repeat the procedure, but rotate the line generating optic 90 degrees to get the other axis, and superimpose both grids together.

Since so much of the laser power is going to be spread out, this might require a higher power laser to be adequately visible.

One downside - the center of the grid will be "hotter" or brighter, with the grid becoming dimmer from the center out, because of how diffraction gratings work. But again, a higher power laser should overcome this, and should be capable of producing a very large grid.

If you used a pair of line generating laser modules (like you find on ebay) you could simply glue a small piece of diffraction grating on the end of the module. Secure the two lasers together and you'd have a very compact, portable unit that you could put on a small tripod.
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