My diode dot shape is strange

• Mar 28, 2012

• #17

LBPark

0

Joined

Feb 28, 2012

Messages

69

Points

0

I use this lens

you are right
lens is in the backward

but then focus ring doesn't assemble.

the lens is problem

 

• Mar 28, 2012

• #18

RyanElectro

0

Joined

Feb 18, 2012

Messages

796

Points

28

I've never seen that type of lens before :S
Is it a glass 3-element lens? What kind is it?

 

Last edited: Mar 28, 2012

• Mar 28, 2012

• #19

LBPark

0

Joined

Feb 28, 2012

Messages

69

Points

0

I don't know.
I just bought a normal glass lens on eBay but I have received was this.

so I complain the seller. then he said he gave a fully threaded one.
but this lens come again.

EDIT : If you want to see[LINK]

 

Last edited: Mar 28, 2012

• Mar 28, 2012

• #20

DTR

0

Joined

Jun 24, 2010

Messages

5,684

Points

113

It looks like a half threaded O-Like lens. Very good lens. Here see this thread about 445 dot/line.:beer:

http://laserpointerforums.com/f65/there-something-wrong-my-beam-spot-59400.html#post839381

 

• Mar 28, 2012

• #21

LBPark

0

Joined

Feb 28, 2012

Messages

69

Points

0

yeah, I know it looks like O-Like lens but it's upside down.

 

• Mar 28, 2012

• #22

E

ElektroFreak

0

Joined

Nov 7, 2008

Messages

5,725

Points

0

You can't really use a focus ring with those lenses due to the lack of thread on the front half, but those are the best lenses for those 445nm in terms of the beam quality they provide. Not having a focus ring is a small and pretty insignificant issue.. you can still turn the lens to focus without the focus ring.

 

• Mar 28, 2012

• #23

gif

0

Joined

Mar 13, 2012

Messages

286

Points

18

through my research so far....

glass 3-element lens does a bit better job on getting near circular shape dot from 445 diode, but this shape is normal, you just have to focus it.

 

• Mar 28, 2012

• #24

M

mattco2

0

Joined

Feb 12, 2012

Messages

237

Points

0

The three element actualy clips the beam so you get 15% less power but a much better dot profile while single elements are expensive the offer the most power for burning and such it just kinda depends on your priorities

 

• Mar 28, 2012

• #25

M

mattco2

0

Joined

Feb 12, 2012

Messages

237

Points

0

https://sites.google.com/site/dtrlpf/home/glass-lenses
If your interested in one od the lenses i mentioned dtr has them here

 

• Mar 28, 2012

• #26

jeffreythe00

0

Joined

Jan 13, 2010

Messages

2,516

Points

63

Just twist your lens until the beam cleans up. Thread the lens all the way in. Then keep unscrewing the lens little by little (turning the laser on in between to see where you are at with the adjustment) until you get a nice beam and leave it that way. You can then just use a magnifying lens or jewelers loop to focus it down for burning

 

Last edited: Mar 28, 2012

• Mar 28, 2012

• #27

jakeGT

0

Joined

Oct 29, 2010

Messages

3,532

Points

0

There is absolutely nothing wrong with your diode. The lens appears to be an o-like half threaded. Simply put a single layer of electrical tape on the unthreaded part of the lens, and put your aixiz focus knob (if you have one) on the tape, and thread the lens in.....

Wallah- focused coherent light able to burn

 

• Mar 28, 2012

• #28

gif

0

Joined

Mar 13, 2012

Messages

286

Points

18

mattco2 said:

The three element actualy clips the beam so you get 15% less power but a much better dot profile while single elements are expensive the offer the most power for burning and such it just kinda depends on your priorities

Click to expand...

exactly, OP if you are after burning more power then go with the G2 lens, but if you want near circular dot then 3 elements, which will still burn but you will lose 15% power as mentioned.

 

• Mar 29, 2012

• #29

M

mattco2

0

Joined

Feb 12, 2012

Messages

237

Points

0

or you could go with a crap ton of optics for correction but I don't recommend that