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Old 04-18-2012, 10:34 PM #1
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Default What Laser is Best for a Good Daylight Visible Point?

Hi All, I need a daylight visible laser point (not the beam, just the point) for work purposes. I work in a quarry and walking up to the rock face can be a health hazard. So, when discussing rock layers with a Geologist, it would probably be best to discuss them at a distance and use a laser pointer to note points of interest in the rock face. What should I be looking for in a daylight visible laser point? Looks like green is the most easily visible... Will and my coworkers need special glasses? What kind of cost am I looking at? Thanks!


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Old 04-18-2012, 11:25 PM #2
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Default Re: What Laser is Best for a Good Daylight Visible Point?

Well, the most visible wavelength to the human eye is 532nm green. There are plenty of suppliers in the forum adds found at the top and bottom of the page. You could also check the Buy, Sell and Trade forum for sellers. Another option would be a high powered 445nm blue, which is still very visible, but at those powers it would be dangerous to use around potentially hazardous machinery. I think a 532nm 100-200mW pointer is probably your best bet. Good luck with your search, I hope I could help!
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Old 04-19-2012, 02:14 AM #3
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Default Re: What Laser is Best for a Good Daylight Visible Point?

Lazerer and O-like are two good, cheap and reliable companies. Cost will probably set you back $70 ish. 100-200mW should be quite enough, just don't point at anything reflective since it could damage your eyes. Your original purpose should be just fine though.
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Old 04-19-2012, 04:23 AM #4
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Default Re: What Laser is Best for a Good Daylight Visible Point?

Quote:
Originally Posted by John Capelo View Post
Lazerer and O-like are two good, cheap and reliable companies. Cost will probably set you back $70 ish. 100-200mW should be quite enough, just don't point at anything reflective since it could damage your eyes. Your original purpose should be just fine though.
I agree if only used in this application, but anything else glasses are a MUST! a laser at this power will still cause eye damage!! Accidents still happen even under the best situations.
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Old 04-19-2012, 01:03 PM #5
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Default Re: What Laser is Best for a Good Daylight Visible Point?

Thank you all! This is exactly the kind of direction I was looking for.

Typically, limestone isn't reflective but I'll splurge on a few pair of safety glasses just to save any unexpected trips to the eye doctor.

All the best!
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Old 04-19-2012, 10:16 PM #6
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Default Re: What Laser is Best for a Good Daylight Visible Point?

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Originally Posted by chester View Post
Thank you all! This is exactly the kind of direction I was looking for.

Typically, limestone isn't reflective but I'll splurge on a few pair of safety glasses just to save any unexpected trips to the eye doctor.

All the best!
Well, with the application that you are dealing with (pointing at limestone in a quarry-type environment I'm assuming), you may want to get some simpler protective goggles. There are a few threads on the forum that test cheapy goggles that turn out to be very good at protecting your seeing balls. I'll go find some for you real fast...

Edit* Found 'em:

Cheap Safety Goggles Destructive Test: Uvex S0360X Ultra-spec 2000

Cheap Safety Glasses - TESTED

They cover 400-560 typically and it will protect your eyes more than enough for the application that you spoke of.
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Yeah, I'm new to the lasing world, but I learn fast and I always try to take the right safety precautions. If an idiot like me can do it, what's your excuse? Get yourself some goggles and maybe you can get your hands on some powerful photon-shooting devices like the best of them.

Lasers!:
405nm 100mW~ in an Altoid's tin. Probably looks like a detonator to everyone else, because they give me scared looks when I have it out in public...
405nm 125mW~ PVC Host
445nm M-140 Diode in a C6 pushing 1.62A
532nm 5mW~ DX Laser
635nm 5mW Laser Pen (no clue where I got this one)
635nm Mits diode looking for a home that Lazeerer is soon going to provide in the form of his Small Sun kit
660nm 250mW~ Labby(now dead, working on making a better portable lab-style that you can see in this thread)


If I took the time to thank everyone on this forum who has helped me with their posts, then I'd probably get banned for spam, so I'll let my signature to it for me: ! And for the ones with big egos:

Last edited by Just4FunReally; 04-19-2012 at 10:18 PM.
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Old 04-20-2012, 07:52 PM #7
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Default Re: What Laser is Best for a Good Daylight Visible Point?

Quote:
Originally Posted by chester View Post
Hi All, I need a daylight visible laser point (not the beam, just the point) for work purposes. I work in a quarry and walking up to the rock face can be a health hazard. So, when discussing rock layers with a Geologist, it would probably be best to discuss them at a distance and use a laser pointer to note points of interest in the rock face. What should I be looking for in a daylight visible laser point? Looks like green is the most easily visible... Will and my coworkers need special glasses? What kind of cost am I looking at? Thanks!
Keep in mind when pointed at limestone illuminated by full sunlight and some distance away no moderately priced green laser will work well. Improvements to pointing(spot visibility) can be made with a beam expander attached.
Good idea to have glasses on hand. OSHA levies hefty fines for work safety violations.

What will be your typical working distance ?
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Old 05-25-2012, 03:57 PM #8
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Default Re: What Laser is Best for a Good Daylight Visible Point?

The distance could be as little as 20 feet and as much as 150 feet.

Again, thanks for assisting!

Chester
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Old 05-26-2012, 08:42 AM #9
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Default Re: What Laser is Best for a Good Daylight Visible Point?

If you are wearing goggles, you will be completely unable to see the projected dot, due to the fact that the energy from the wavelength is very low.
Just like beaming at night, it is impossible to do so while wearing goggles. If you are unsure of risks, you would be better off getting a tripod and mounting a 200mW green for pointing.
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