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Old 04-19-2012, 07:50 AM #1
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Default 473nm - Minumum mW for Good Beam Visibility at Night without fog?

Hello,

I am looking to get my 1st 473nm laser for the purpose of enjoying the beam outdoors in the night sky! I did some comparison with the relative brightness calculator which stated that 20mW of 473nm is only 18% as bright as 20mW 532nm.

I was looking at some older posts from 5 years ago where someone said they could see the beam of a 17mW 473nm quite clearly. I was thinking about getting a lab 473nm but my primary use would be outdoors at night so plugging it in indoors and pointing it out the window at the right angle into the sky might be a bit tricky and maybe not the safest. I guess it also isn't as ideal because of the warmup time required.

Since handhelds are quite expensive I was considering the Dragon Lasers 20mW 473nm which is $300 and probably nearing the top of my budget.

Would 20mW of 473nm be sufficient to be able to enjoy the beam without fog at night? I don't know if it would be worth it to spend $300 if the beam isn't that visible, so maybe that would make it more compelling to get a labby instead with a more favorable cost / mW ratio.

Thanks very much for any input!



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Old 04-19-2012, 11:01 AM #2
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

20mW should be enough, I can tune down my labby tonight to confirm, however I think the spartan will be overspec, you should be fine going with that.

...But, if you're willing to spend another $90 you can get a >80mW handheld from lasever.com. Same host as CNI's PGL-III-C.
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Old 04-19-2012, 11:49 AM #3
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

Quote:
Originally Posted by ZRaffleticket View Post
20mW should be enough, I can tune down my labby tonight to confirm, however I think the spartan will be overspec, you should be fine going with that.
.
Wow thanks, if you have a way of producing 20mW on your labby I would be really curious to know how the 20mW beam of your 473nm looks. That would be great!
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Old 04-19-2012, 04:23 PM #4
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

Yeah, I get home around 4, so I'll have some up by 4:30. At least my room gets pretty dark.
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Old 04-19-2012, 09:07 PM #5
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

~double post 5:00 instead~

Instead of resizing everything, here's a link to the album.

Top left to bottom right (1-7) :
1) Laser running at full power (~240mW) lasing towards camera. If you want to know what 473nm looks closest to, it's the spec of dust in the top right. Or the beam in my avatar.
2) Laser at ~20mW (+/- 2mW) lasing towards camera
3) Beam perpendicular to camera at ~20mW - more visible to me than my camera.
4) Daytime shot toward camera, ~20mW
5) Shining on laserbee.
6) laserbee reading, why did I take a physical picture of my screen?
7) Finally, what you'll see. ~20mW lasing away from the camera.

If you want ~80mW pictures let me know.
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Old 04-20-2012, 03:18 AM #6
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

Thank you so much for taking the time to upload and take those pictures for me!
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Old 04-20-2012, 10:14 AM #7
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

Here a part of my collection some pics on my >80 mW 473 nm pointer and a comparison with other wavelengths
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Old 04-20-2012, 11:21 AM #8
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

Also have a 473nm labby and a 30mW green pointer. Will measure the power required of 473nm to match the 30mW 532nm. I'm back at home on Saturday... from theory to practice!

-mojo-
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Old 04-20-2012, 05:22 PM #9
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

I can do that as well, It's about 190mW 473 to match ~52 mW 532 in my eyes. Getting it on camera is the hard part.
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Old 04-21-2012, 01:03 AM #10
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

Quote:
Originally Posted by Arayan View Post
Here a part of my collection some pics on my >80 mW 473 nm pointer and a comparison with other wavelengths
Arayan, those are some gorgeous pics!

Do you know what company the 473nm handheld that you bought from Styropyro if from? Is it from Lasever as well?


Quote:
Originally Posted by mojo_1234 View Post
Also have a 473nm labby and a 30mW green pointer. Will measure the power required of 473nm to match the 30mW 532nm. I'm back at home on Saturday... from theory to practice!

-mojo-
That would be great to see Mojo, I would be curious to see the 473nm side by side with a 532nm to compare what power is needed to match the 30mW green. I already have a 30mW pen style 532nm so I would probably want my 473nm that I will purchase to be at least as bright as the 30mW 532nm.


And thanks again Zraffleticket for helping me figure all this out!
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Old 04-21-2012, 01:08 AM #11
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

No problem!
I do believe his was also from lasever, however styro says it is not. Not sure how many companies actually use that host.
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Old 04-21-2012, 09:00 AM #12
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

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Originally Posted by ElectroMagneticFreak View Post
Arayan, those are some gorgeous pics!

Do you know what company the 473nm handheld that you bought from Styropyro if from? Is it from Lasever as well?
Thanks
...unfortunately I don't know the source and I have not asked directly to Styro...but it's an amazing pointer
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Old 09-24-2012, 04:40 AM #13
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

Now, I'm doing the research and that has to use 473nm 5mW Laser. Then, I would like to get more information about that such as goods price, Saler or data sheet something like that.

Thank you very much.
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Old 09-24-2012, 08:55 AM #14
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

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Originally Posted by Wannida View Post
Now, I'm doing the research and that has to use 473nm 5mW Laser. Then, I would like to get more information about that such as goods price, Saler or data sheet something like that.

Thank you very much.
Here FS: CNI GLP 473nm 10mW a very good price for a 10mW 473 nm
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Old 09-25-2012, 04:49 AM #15
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

80 ~ 100mW of 473nm is the go
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Old 09-25-2012, 10:56 AM #16
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Default Re: 473nm - Minumum mW for Good Beam Visibility at Night without fog?

10mW at night are enough for a good visible beam.

As Fiddy mentioned, the more the better
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405nm >> Wickedlasers SONAR by lazeerer peak@968mW
445nm >> Kryton Smooth by lazeerer peak@2075mW
453nm >> Lipstick by rhd peak@158mW
473nm >> Optotronics RPL-B peak@112mW
515nm >> Skylasers HL peak@41mW
532nm >> Novalasers Alpha HP peak@284mW
589nm >> CNI PGL-III-A peak@89mW
594nm >> Laserglow Rigel peak@4mW
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