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Old 05-02-2010, 07:09 PM   #1
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Default green laser 50mW vs green laser 100mW..how much the line visibility difference?

Ok.So I have a green laser 50mW and I think I wants to buy another green laser 100mW.I don't really satisfy with my 50mW green laser because the line is not very noticeable at night.It still there but its not as bright as i wanted.So I've been thingking about getting a 100mW of green laser.How much the visibility difference of these 2 at night.Like "the 100mW are 2x brighter than the 50mW" .Give a comparison something like that.

UPDATE:
Now its not about 100mW vs 50mW instead...

200mW VS 50mW OF GREEN LASER!!!!!!!.I HAVE CHANGED MY MIND!!!!MUAHAHAHA

Update:
this is the "inside component" of the laser that I would like to buy
http://www.laserpointer.co.il/images...serPointer.jpg.

Is this a good laser?

Last edited by hertzamplifier; 05-04-2010 at 08:19 PM.
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Old 05-02-2010, 07:29 PM   #2
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

200mW is 2x as visible as a 50mW. Get a 200mW one from rayfoss, check my signature.
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Old 05-02-2010, 10:20 PM   #3
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

Its just a general rule, nothing scientific behind it but 4 times the power is usually 2 times as bright.

There is more to take into account though, both have to have the same beam diameter and divergence. A 200mW beam with a 5mm diameter will probably look weaker than a 50mW beam with a 1mm diameter. There is really no way to say exactly how much brighter it will look.
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Old 05-02-2010, 10:32 PM   #4
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

you should be seeing that 50mw laser just fine ...my 5mw are noticable in low light....honestly i sold my opto.150/and skylaser 170 because ladshoppe 50mw had the better of the 3 in diverg. at long range..of course it wouldnt burn like opto/sky up close but i didnt care about that..all 3 at night were equally bright but in a lite room opto./sky were brighter of course 200.00 vs led shoppe 20.00 i settled for led shoppe and put extra money toward bluray 600mw plus or endeaver(nova)275mw
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Old 05-02-2010, 11:24 PM   #5
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

That is true, a good 50mW laser should be slightly visible in a lit room. I think your 50mW laser is incredibly under spec if you can't see the beam at night. Hell, I can see my 5mW 635nm beam at night fairly well.
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Old 05-03-2010, 07:24 AM   #6
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

Anyway, buying a 200mW greenie is a must at some point of the hobby, so just buy it now hehe
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Old 05-03-2010, 07:38 AM   #7
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

My 150mW is much brighter than my 30mW, so I imagine 100mw vs 50mW must at least be a very noticable upgrade
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Old 05-03-2010, 02:47 PM   #8
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

(theoretically) 150 is 138% brighter than 30 and 100 is 41% brighter than 50.
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Old 05-04-2010, 08:01 PM   #9
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

Quote:
Originally Posted by Pontiacg5 View Post
That is true, a good 50mW laser should be slightly visible in a lit room. I think your 50mW laser is incredibly under spec if you can't see the beam at night. Hell, I can see my 5mW 635nm beam at night fairly well.
Ah,yeah.My 50mW were very noticeable at dark room now.It just that before my 2xtripleA battery gotten weaker.I replace it with rechargeable battery that are fully charge and it become brighter now.
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Old 05-04-2010, 08:06 PM   #10
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

Quote:
Originally Posted by Cyparagon View Post
(theoretically) 150 is 138% brighter than 30 and 100 is 41% brighter than 50.
Yes but that's what I meant, when 138% brighter was such a big jump, then I would think 41% should be at least a very noticable difference. But I have not owned a 100mW greenie so I can't know for sure.
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Old 05-04-2010, 08:06 PM   #11
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

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Originally Posted by Hallucynogenyc View Post
Anyway, buying a 200mW greenie is a must at some point of the hobby, so just buy it now hehe
After going to the retail shop today,I've been thinking of buyin 200mW instead of 100mW.They have good price,140 USD...
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Old 05-04-2010, 08:14 PM   #12
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

Quote:
Originally Posted by Grix View Post
Yes but that's what I meant, when 138% brighter was such a big jump, then I would think 41% should be at least a very noticable difference. But I have not owned a 100mW greenie so I can't know for sure.
What about 200mW vs 50mW.how much the percentage diff?
Im too lazy to make the math.
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Old 05-04-2010, 08:16 PM   #13
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

should be around 200% or twice as bright
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Old 05-04-2010, 08:35 PM   #14
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

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Originally Posted by Pontiacg5 View Post
should be around 200% or twice as bright
Nice
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Old 05-04-2010, 08:42 PM   #15
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

I know we are talking about beam-visibility, but here are some pictures for dot comparison:
-------------------- 25mW --------- 50mW -------- 100mW ---------------

Lights off:


Lights on:
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Old 05-04-2010, 09:00 PM   #16
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Default Re: green laser 50mW vs green laser 100mW..how much the line visibility difference?

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Originally Posted by Ash View Post
I know we are talking about beam-visibility, but here are some pictures for dot comparison:
-------------------- 25mW --------- 50mW -------- 100mW ---------------

Lights off:


Lights on:
thanks for that picture.Are this 3 has the same nm?
If so larger dots means brighter beam?
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