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Mellow
4.99mW Green Laser Toy
Joined: 24 Oct 2005
Posts: 6
Location: Sweden
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 Posted: 10/24/05, 9:51 AM Post subject: What is &q |
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(sorry, I posted in General questions first, my misstake!)
I bought a 103mW laser and in the spec. it says 0,8mRad!
What does this means, what is "mRad"?
Is a lower "mRad" better than a higher!?
What´s the "mRad" on WL:s models ex. Exodus and Nexux?
Happy for answers...
Best regards
Mellow |
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Lift-off
55mW Advanced Wicked Laser
Joined: 26 Aug 2005
Posts: 67
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| Posted: 10/24/05, 12:48 PM Post subject: |
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Hi Mellow.
mRad is the measure of the angle. A circle angle has 1 360 degrees aperture, that is the same as saying 6.28rad.
If you make a linear approximation considering the sin(angle formed between the centerline of the axis and the external beam cone line) as the angle itself, you can find that 0.8mRad is similar to say that your laser will be 8meter in beam diameter at a 10Km distance. This is called the divergence.
Anyway, i think 0.8mRad'd be a too special divergence that cannot be achieved easily. FOr this i suppose that your 0.8mRad is the semi-divergence. Infact, generally lasers has 1.2-1.5mRad divergence...
Where did you buy it??
Best Regards,
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Mellow
4.99mW Green Laser Toy
Joined: 24 Oct 2005
Posts: 6
Location: Sweden
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| Posted: 10/24/05, 1:55 PM Post subject: |
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Okay, so if I understand you right a laser whith 0,8mRad is stonger or "better" than a normal 1,2-1,5mRad one!?
I bought it from a guy in Germany! |
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lathans
25mW Classic Wicked Laser
Joined: 15 Oct 2005
Posts: 33
Location: Norway
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| Posted: 10/24/05, 3:25 PM Post subject: |
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Yes, low mRad is good if you don't want the thin beam to be several times thicker over long distances.
High mRad values gives a large dot/thick beam at long distances.
Low mRad may be a big circle on a wall at a long distance, while high mRad may be a circle so big that it lights up the whole house. |
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55mW Advanced Wicked Laser
Joined: 26 Aug 2005
Posts: 67
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| Posted: 10/24/05, 3:41 PM Post subject: |
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Yes, that's correct, but i think it's very difficult to find a 0.8mRad laser. I repeat that i suppose your 0.8 is the semi aperture, that is = 1.5-1.6mRad.
Anyway, it's nominal, good.
Regards,
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Mellow
4.99mW Green Laser Toy
Joined: 24 Oct 2005
Posts: 6
Location: Sweden
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| Posted: 10/24/05, 5:18 PM Post subject: |
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Okey, I bought it on ebay.
Now I wonder if its comparable of any of the models here on WL? Is it "better" or "worse"?
I´f there is anyone who could tell me...?
This are the info I recieved: (It´s translated thats why the bad english)
A UNIQUE PIECE WITH MEASURED LEGEND CLINGING 103MW OUTPUT !!
The ser lasers is simply indescribable. It combines the superior jet characteristics of the professional diodes and Zeiss optics of my other pointers with one almost breath-robbing intensive brightness, which steals many Discolasern the show.
103mW with straight times 0,8mRad jet divergence - corresponds to the power density of a pointer of e.g. "wickedlasers" with 220mW achievement!!!
With the High end laser toppen it offered here everything else - guarantees!
The main differences:
-0,8mRad instead of more standard-usually 1.2-1.5 mRad jet divergence (the smaller the divergence, the more highly the range)
-Zeissoptics instead of standard optics
selected KTP crystals
selected diodes of the extra class
diodenstromerhoehende plates
-are selected no cheap modification , all construction units !!
This portable high-power laser is a wonderwork of the technology, because its brightness when minimum dimensions is fascinating and breath-robbing at the same time. By the manufacturer in the Far East only few copies of this achievement strength were manufactured. All construction units on the inside consist of selected High end components. This begins with the 500mW-Diode (Sony) and stops with the SMD chip and the crystal. The jet of this particularly strong unique piece has with unbelievable 103mW a maximum range of approximately 85 kilometers !!
The housings are with noble chrome coated and/or-high-quality matte silver painted. Each detail is appropriate regarding quality and functionality for professional requirements.
The laser module inside the housing is not of the usual cheap modules, but a professional copy, which was modified particularly for the installation in the pointer housing. Its intensity is 23-42x more highly than with usual < 5mW-Laserpointern.
It is brighter around the factor 4800 (! ) as a standard laser pointer with 670Nm (red), as it is often offered here with ebay e.g. as cat toy.
The equipment would have a regular value of approximately 750 euro in the sales, into the free market will however never come, since only those copies offered here could reach this achievement. Due to the contact of many years to the asiatic manufacturer these exception devices can be offered briefly!!
Technical data:
Achievement: max.103mW
Jet divergence: 0,8 mRad
Diode manufacturer: SONY
Range: ~85 kilometer (~52 Miles)
Battery type: 2xAAA (provided)
Mass: 158mmx13mm
Type of radiation: CW (Continueous Wave) |
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chargerman
Wicked Lasers God
Joined: 08 Sep 2005
Posts: 1736
Movie(s): 2
Location: Big Horn Mountains, Wyoming
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| Posted: 10/24/05, 5:58 PM Post subject: RE: |
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I don't suppose you would care to tell us where you got it? There is a german website selling, what appears to be the same units that Wicked sells. I am sure we would all like to take a look at what you bought! Cheers Dale 
_________________
Best Regards Chargerman
Great divergence calculator 
http://www.pseudonomen.com/lasers/calculators/ |
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werner65
4.99mW Green Laser Toy
Joined: 24 Oct 2005
Posts: 1
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Athoul
Wicked Lasers God
Joined: 13 Sep 2005
Posts: 7544
Location: Canada
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| Posted: 10/25/05, 12:31 AM Post subject: |
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Basically what they are saying is that their lasers are better colimated then the ones here at Wicked. They say that due to this their 70mW model is comparable to Wickeds 125mW model. This is highly untrue. Since 0.8mrad translates to a beam diameter of 80mm at 10 meters and 1.5mRad is 150mm at 10 meters, the dot will be smaller(about half) and the hot spot will be more compact at a farther distance allowing you to burn some things from further away. Don't be fooled though as this is not a function of the laser, but is just a function of the OC lens. IMO this looks like they simply refocused the laser or replaced the final colimating lens to get this effect. It's not hard to modify Wicked's to have a lower divergence, however this WILL VOID any warranty! I think Wicked leaves it at 1.5mRad for safety issuses, so you have less of a chance of blinding someone at a long range by mistake. Since you need to be within a few inches to burn certain things, these numbers don't mean that much at such a close range anyway.
cheers, |
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Steve0000
Wicked Lasers Master
Joined: 27 Aug 2005
Posts: 573
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| Posted: 10/28/05, 9:24 PM Post subject: |
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| Athoul not true, with a mrd of .8mrd the beam will be .8mm in diameter, 1.5mrd equals 15mm at 10m , not 80mm and 150mm respectively at 10m. Your beam diameter for .8mrd is about 1.6mm in diameter at the collimating lens. |
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Athoul
Wicked Lasers God
Joined: 13 Sep 2005
Posts: 7544
Location: Canada
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| Posted: 10/30/05, 1:10 AM Post subject: |
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| Yes you are correct... somehow I posted what it should be at 100 meters. |
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