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Old 07-25-2010, 12:25 PM #1
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Default 445nm Firefly

Hi all
i build blue laser but the dot is a big rectangular not like a true ray
http://cjoint.com/?hzolV63Wth


the module with glass lens G1
445nm 405nm Laser Module Housing- no lens 10.5 mm dia. - eBay (item 380252966243 end time Jul-28-10 23:46:36 PDT)

Help me!!!


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Old 07-25-2010, 12:33 PM #2
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Default Re: 445nm Firefly

Nothing to worry about, even CNI´s PGL-III-A has a rectangle output
Spartan Series 1W Blue Handheld Laser, Rectangle Beam :: Blue Handheld Laser ----- 447nm Laser ----- Spartan Series Lasers :: Handheld Lasers :: Dragon Lasers
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Old 07-25-2010, 12:41 PM #3
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Default Re: 445nm Firefly

but the rectangular output is very big maybe 5 cm length and 2 cm width the distance on the pic between my hand and the wall is under 1 meter it's not a laser it's a flashlight
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Old 07-25-2010, 12:53 PM #4
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Default Re: 445nm Firefly

Have you focused it properly? Are the diode pushed all the way into the module?
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Old 07-25-2010, 01:03 PM #5
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Default Re: 445nm Firefly

I screwed through, and see the link http://cjoint.com/?hzoZxRNhKw
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Old 07-25-2010, 01:17 PM #6
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Default Re: 445nm Firefly

It seems that you are not focusing the beam correctly..
or you are not getting the full beam profile through your
lens...

I get a beam that looks like this ------ and
it measures 2mm X 35mm when focused at 35 feet..


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Last edited by lasersbee; 07-25-2010 at 08:48 PM. Reason: Spelling errors
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Old 07-25-2010, 01:35 PM #7
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Default Re: 445nm Firefly

i can't focus more because is fully screwed http://cjoint.com/?hzpwqErymB if i unscrew the dot is much big
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Old 07-25-2010, 06:11 PM #8
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Default Re: 445nm Firefly

Try flipping the lens around so the opposite end is facing out.

When I powered up my first module using a 405nm Aixiz lens, I had the same issue.
Upon flipping my lens around, the beam became drastically more focusable.

From my own experience, it seems the "flatter" end of the lens faces the diode and the "rounder" end faces out.
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Old 07-25-2010, 06:29 PM #9
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Default Re: 445nm Firefly

If you are using the 405-G-1 lens and you have the spring under the lens, remove it. The lens needs to be closer to the diode than the spring allows. You can either cut the spring in 1/2 or you can use a single wrap of teflon tape on the lens nut to make it more "snug."

If that doesn't work, either your diode is not pressed all the way into the pocket or you have a "Sure" brand module that does not have the threading all the way to the bottom, preventing the lens from getting close enough.

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Old 07-25-2010, 07:24 PM #10
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Default Re: 445nm Firefly

No spring inside, http://cjoint.com/?hzvly2MJhm
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Old 07-25-2010, 08:22 PM #11
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Default Re: 445nm Firefly

thank to all, Yeah Daguin you right i find the gray cylinder this give me more pressed in the module
http://cjoint.com/?hzwfqFxNHz

i focused a clean rectangular blue but is too much large, how i can have a really dot like a true laser ?
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Old 07-25-2010, 08:35 PM #12
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Default Re: 445nm Firefly

here the blue rectangular at 3m http://cjoint.com/?hzwvaNqgr4
is 10.5cm x 6cm
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Old 07-25-2010, 09:03 PM #13
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Default Re: 445nm Firefly

That STILL looks quite unfocused... Something else is going on here Firefly.. Something with your lens isn't right. It still isn't focusing as much as it should... Have you tried turning the lens around?
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Old 07-25-2010, 09:15 PM #14
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Default Re: 445nm Firefly

it's the best focus that lens give
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Old 07-27-2010, 07:37 AM #15
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Default Re: 445nm Firefly

Yes but have you took the glass lens out of the housing, turned it round and put it back in? , I , like others have had this problem, and thats what it was.
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Old 07-27-2010, 07:53 AM #16
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Default Re: 445nm Firefly

Quote:
Originally Posted by ped View Post
Yes but have you took the glass lens out of the housing, turned it round and put it back in? , I , like others have had this problem, and thats what it was.
the lens is fixed on this (c) CJoint.com, 2008 and I have not removed the lens of the "screw"

when i screw or unscrew the spot disappears

Last edited by Firefly; 07-27-2010 at 07:56 AM.
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