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Old 02-02-2009, 12:39 AM #1
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Default Lightpath small fl Lens

In my laser delusion one night i order this incredible expensive deluxe lens. *:
I cost me 66 each plus 25 taxes. :-[ *euros.
Its A coated for 400-600nm.

[img]www.tshocker.de/Meinebilder/lpf/lightpathsmallfl/lensbluspecs.jpg[/img]


The results are awesome someway. *8-)
The Lens is called 352330-A, manufactured by Lightpath, but i have to buy at their
distributor http://www.ams-technologies.com .

In catalog pdf search for 352330
http://www.lightpath.com/literature/...s_Overview.pdf



While i check up the lens, i put my focus on power and beamspot quality at 6 meters.

It does not fit in a aixis lensnut. It has 6,35mm diameter instead of 7mm.
I have no proper mount for it!
This is a problem, the beam quality cannot fair compared.
Maybe i lathe one by myself the days if i have time. *
I use one steelnut and grind the rear end down that i can reach the diode with the shorter FL lenght.

Power test:

What you see on the picture can be taken as average.
I make several measument and results are close together.
Aixis *128mw
Roithner *142mw
Lightpath 165mw

IMHO
This increase in power is way worth to search for efficient Bluray lens.

[img]www.tshocker.de/Meinebilder/lpf/lightpathsmallfl/lensblupower.jpg[/img]


For the beamspot comparison i mount my bluray in this cheap DX clamp and tripod.
To let you get an impression what you see i put a 9 Volt batterie on a sled cardboard box in the picture.
Backround is a white door.

[img]www.tshocker.de/Meinebilder/lpf/lightpathsmallfl/lensblubeamspots.jpg[/img]

The Aixis have the best beam Quality i would say.
the roitner take second place, but its not fair because of the DIY mount on the Lightpath!!!
The biggest problem is the off centered beam, that make the beam looking bad.

I learn theat speziall for the small FL lenses its extrem important that it fits the tread tight,
if there is a bit wobbling you have "bad jumping beam center". !? Lot more then with the standard fl lens.
And small fl tend to show this bar thing at the beamspot,

With my red lasers i notice something strange!
A rohm diode can be focused in standart aixis while the LG20x not!
For the red LOC the focal point must differ!
The focal point is that far away that the tread not even grab.



Now I get 165mw out of a phr at 140mw. It burns wonderfull.
No need to say that i get a nice small beam diameter but i have no time to make this pictures today.
This beamsize picts are the most difficult.

Cant wait for my already ordered 6x!

I hope IgorT lens is something like that, but proper mounted. *8-)



daniel




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Old 02-02-2009, 01:40 AM #2
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Default Re: Lightpath small fl Lens

Too bad that you couldn't find a good mount for the lens, otherwise it looks good 8-)

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Old 02-07-2009, 05:22 PM #3
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Default Re: Lightpath small fl Lens

quite expensive, but impressive too! thanks for sharing this! :-)
yes, cant wait for igor's lenses to land!
did you experiment with the phr's objective lenses too??

manuel
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Old 02-08-2009, 06:11 AM #4
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Default Re: Lightpath small fl Lens

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Old 02-08-2009, 08:00 PM #5
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Default Re: Lightpath small fl Lens

Quote:
Originally Posted by Danjoo
In my laser delusion one night

Now I get 165mw out of a phr at 140mw. It burns wonderfull.
No need to say that i get a nice small beam diameter but i have no time to make this pictures today.
This beamsize picts are the most difficult.

Cant wait for my already ordered 6x!

I hope IgorT lens is something like that, but proper mounted. *8-)

daniel
Good work on your lens testing.

Did you mean 165 mw out of a phr at 140 ma.

That is good efficiency.

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Old 02-08-2009, 10:05 PM #6
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Default Re: Lightpath small fl Lens

@krutz
yes i test the lens from sleds but the diffusion is to bad for me, and its very hard to align with the diode proberly, and the power is around105mw with the same laser. *But iam not sure if the sled short fl wich i have mounted is the one from bluray sled. Maybe the efficienzi is better with a original bluray one! but the diffusion is not good with all the slaed short fl.

@larry
yes exactly!
right now i grab a brandnew lens out of an &quot;aixix 10 blank pack&quot; the original with aperture cap.
I measure 118mw i do not switsch of the laser yust change to lightpath lens and the reading is still 165mw.
And iam sure that this diode is at 140ma!

What laser power measurement do you guys have with phr at 140ma with aixis stock lens?
Like i understand its a normal reading to get around 120 mw out of a phr at this current with this lens config.
This help me to believe that the measurements are korrekt.


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