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Dragonlasers beam expander video

electron

electron

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FrancoRob said:
[quote author=electron link=1216741151/40#43 date=1217856366]Looks good, can you tell me what size the threads are that the mount/adapter screws onto, 1 inch c-mount is usually standard ( 25 mm )
on the back of the lens, take a ruler if you can, approximate with a ruler would be fine; Thanks!

Pictures look great, good job.
Click to expand...

The threads external diameter of the BE (that is, the part which fit to the adapter) is 21.8 mm[/quote]
Thanks, it's a little different than the standard ones; that's what I wanted know.
 





FrancoRob

FrancoRob

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steve001 said:
Now i'd like an adapter for the Nova Alpha lasers. I've shone my green laser through my 30x50 spotting scope for long range targeting. The beam enters at ~1mm dia and exits at 50 mm dia. It does significantly increase the range for targeting.
Click to expand...

Oh, well, I don't know if Aurora adapter can be used also for Alpha, maybe some other guy may be helpful, anyway the check is not so expensive, 5.00 US$ free shipping.....
 
electron

electron

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I've got one coming with all 3 adapters, probably can find uses for the other adapters as I experiment with them; might just have to have a custom adapter made for other uses. It's amazing how cheap they can produce those adapters for; we couldn't get the bare metal for that price.
 
FrancoRob

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electron said:
I've got one coming with all 3 adapters, probably can find uses for the other adapters as I experiment with them; might just have to have a custom adapter made for other uses. It's amazing how cheap they can produce those adapters for; we couldn't get the bare metal for that price.
Click to expand...

I have seen your nice presentation of your RPL 400 fitted with a Melles Griot 3x B.E. (good work, your adapter); it could be nice to see how the DL B.E. (10x) works on your RPL! Let me know if you'll decide to manufacture a custom adapter for the job.... :)
 
electron

electron

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Yes that is exactly what I had in mind, I'll put the DL BE on my Nova for sure, but I was hoping it would also fit my RPL Adapter; sounds like it won't, so another custom adapter is probably going to have to be fabricated to use the DL BE on the RPL, we'll see.
 
FrancoRob

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FireMyLaser said:
Can you tell if there's a significant power loss, like um, does it look less bright?
Click to expand...

As I told you, I have performed a new output test with the DL BE fitted on my Viper 95 mW: the test has been carried out at a distance (between BE lens and the LaserBee I sensor) of 25 inches, just to focus on the sensor a dot sufficiently small.
As you can see in the annexed picture, the measured power output has been of 117 mW. Taking into account that without the BE my previous test measured 125 mW (see: Replay #16, Jul 26th, 2008, 4:43 pm), the power loss due to the BE is the 6.4 %.
 

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laserguys

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FrancoRob said:
[quote author=FireMyLaser link=1216741151/20#37 date=1217852938]Can you tell if there's a significant power loss, like um, does it look less bright?
Click to expand...

As I told you, I have performed a new output test with the DL BE fitted on my Viper 95 mW: the test has been carried out at a distance (between BE lens and the LaserBee I sensor) of 25 inches, just to focus on the sensor a dot sufficiently small.
As you can see in the annexed picture, the measured power output has been of 117 mW. Taking into account that without the BE my previous test measured 125 mW (see: Replay #16, Jul 26th, 2008, 4:43 pm), the power loss due to the BE is the 6.4 %. [/quote]

But the first measurement without the BE was at 4" not 25".
Would that not also make a difference?
Shouldn't the 2 measurements be taken from the same distance?
Just curious :-?
 
f22warzone

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should not make a difference as long as the beam diameter is the same..... distance only effects mw per cm[sup]2[/sup]
 
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hydrogenman15

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styropyro said:
[quote author=sk8er4514 link=1216741151/0#14 date=1217016086]hmm interesting little device. i too got an email about their new video on youtube b/c i'm subscribed to their videos... not that I like their videos, just to get my videos out there too.

i recently bought a viper 125 (not from DL, from some guy offering it for $140 on CPF) and some little optics caps were included, they seem to work just fine so i really don't see much of a purpose for this $75 device....

just my $0.02
Click to expand...
With a beam expander you can do burning tricks at much farther distances than without the expander. As an example my DIY labby that can light matches at 5 feet max can light matches at over 20 feet with my makeshift beam expander setup. $75 is probably worth it to someone who bought a green laser mainly for burning.

Windstrings has a video somewhere where he popped a balloon from 150 feet with a beam expander on his 300mW Herc.[/quote]


Watch the video. ;) You can decrease the divergence by a factor of ten, witch will increase the range by a factor of ten. :D
thats .2 mrad. ;D I need to find a a way to fit one of these things on my BR and get .01 mrad. ;D

--hydro15
 
Switch

Switch

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should not make a difference as long as the beam diameter is the same..... distance only effects mw per cm2
Click to expand...

Actually it shouldn't affect it at all, as you said, "distance only effects mw per cm2" , so total mW should remain constant. :p
(I'm sure atmospheric junk in that tiny distance is neglijable)

*edit i spelled "witch" wrong*  

--hydro15
Click to expand...

There's an edit button... ::)

edit: which still works apparently :D
 
f22warzone

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true true : ) i was thinking that their was only a certain beam diameter that could be registered .... witch is kinda true as it has to be smaller then say 10cm
 
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f22warzone said:
true true : ) i was thinking that their was only a  certain beam diameter that could be registered .... witch is kinda true as it has to be smaller then say 10cm
Click to expand...

Well of course you can't measure it if the dot is bigger than the sensor head, that kinda goes without saying. ::)
 
VW

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I'll be ordering the beam expander next week, so expect Spartan BP pics and possible vids in around three weeks or so...
 
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