LPC-826 wierd dot. (help)

[tanzy]

Hey guys so i have an LPC 826 in a handheld host and it was working perfectly...
Yesterday it started producing a kind of a smudged dot happened while burning stuff.
Before this the dot was concentrated and precise. Now, there is a kind of splatter.
what i think happened is that when rotating the focus rubber ring (in which the lens is located) a tiny piece of rubber has fallen onto the Diode glass because of friction against the host in rotation.
I cannot tell if this is the exact reason for what has happened but i can think of no other as the AR coated lens im using itself is completely fine from both sides.

I'm attaching pictures, i'll appreciate it someone could help me out here.

Ohh and focusing is not the problem itself i've checked ! infact its focused here to smallest possible dot here ! the splatter seems like it has reduced intensity :cryyy:

Unfocused

without lens

 

[Grix]

If the diode glass is indeed dirty, you can clean it quite easily using a Q-tip and solvent. I use heptane, it really does wonders on sensitive optics.

 

[tanzy]

If the diode glass is indeed dirty, you can clean it quite easily using a Q-tip and solvent. I use heptane, it really does wonders on sensitive optics.

Thats what i'm really not sure about and if that is so could you tell me what kind of shops would keep lens cleaners of this sort

 

[Grix]

I don't know about where you live, but over here you can buy q-tips and heptane at the apothecary. It's quite expensive though, but a small bottle lasts a long time.

 

[lazeerer]

If the diode glass is indeed dirty, you can clean it quite easily using a Q-tip and solvent. I use heptane, it really does wonders on sensitive optics.

This is an Open Can Diode.:beer: The Die might actually have gotten something on it.:undecided:




OP can you take a Picture of the laser without the lens on about 2 feet from the wall.?

Try to get the whole light profile in the picture.

Can you also take a picture of the dot area with the Lens on but defocused.?

Iam guessing his lens is dirty.

 

[Blord]

Turn around the lens and see if the smuch turns too. If the smuch turns then it is on the lens . If not then it is on the die.

 

[tanzy]

This is an Open Can Diode.:beer: The Die might actually have gotten something on it.:undecided:




OP can you take a Picture of the laser without the lens on about 2 feet from the wall.?

Try to get the whole light profile in the picture.

Can you also take a picture of the dot area with the Lens on but defocused.?

Iam guessing his lens is dirty.

Okay im putting them up in the orignal post.

 

[tanzy]

Turn around the lens and see if the smuch turns too. If the smuch turns then it is on the lens . If not then it is on the die.

Im not sure what you mean by the smuch turning. When i turn the lens around the smuch does remain the same. as in not like the orignal it WAS. :can:

 

[tanzy]

bump bump

 

[Blord]

Soak it in clean water or alcohol solution and hope that the dirt goes away. I mean you never going to clean the emitter of the diode and there is no glass window that you can decan.

 

[Muddassir tai]

i think the best technique is the one I told you over the phone... many people here might disagree but it worked for me

 

[LaserAdct]

Sidenote.. That second last picture is awesome, looks like a little sun :can: