Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Laser Pointer Store

Heatsink and beam question 2 in 1

Joined
Dec 2, 2008
Messages
282
Likes
3
Points
0
hello guys i would like to ask about position of heatsink.. does it matter if i will place it around the diode or on the other side of aixiz module..

see picture for better understand..
 

Attachments


Joined
Dec 2, 2008
Messages
282
Likes
3
Points
0
second question is about my laser beam.. i can see other light comming from aperture like a flashlight.. it makes not very nice effect.. is it possible to fix it??? what cause this unwanted efect???
my lens is clean, where is the problem??? could anyone explain it???

cheers guys
 

Attachments

billg519

New member
Joined
Feb 21, 2008
Messages
1,056
Likes
84
Points
0
The heatsink is probably best placed near the diode, the closer the heatsink is to the heat source, the better it will work.

If you are using an aixiz acrylic lens, did you cut the opening in the back larger? Were you focussed to infinity? I just tried four different blurays on my concrete floor and one of them displayed the same effect, although not as pronounced as yours. Yes, my lens is opened out at the back.
 

iewed

New member
Joined
Feb 3, 2008
Messages
797
Likes
2
Points
0
As billg said, the closer the heatsink to the source emitting the heat, the better it can sink the heat.

And it looks like you have some scatter, if it's not caused by a dirty focusing lens, the optic piece on your diode might be dirty.
 
Joined
Dec 2, 2008
Messages
282
Likes
3
Points
0
billg519 said:
The heatsink is probably best placed near the diode, the closer the heatsink is to the heat source, the better it will work.

If you are using an aixiz acrylic lens, did you cut the opening in the back larger? Were you focussed to infinity? I just tried four different blurays on my concrete floor and one of them displayed the same effect, although not as pronounced as yours. Yes, my lens is opened out at the back.

yes i used acrylic lens with cut in the back.. focused to infinity


iewed said:
As billg said, the closer the heatsink to the source emitting the heat, the better it can sink the heat.

And it looks like you have some scatter, if it's not caused by a dirty focusing lens, the optic piece on your diode might be dirty.

lens is clean, but it could be really something on the diode glass.. i saw tiny bit of something on it but i didnt attempt to remove it as i didnt want to destroy it...
but it is barely visible and noticeable... does it really make big deal like this???
 

billg519

New member
Joined
Feb 21, 2008
Messages
1,056
Likes
84
Points
0
A dirty output window on the diode can be a problem. Try a rubber blower or compressed air can of the type used for camera cleaning. Hopefully the air blast will dislodge whatever is clinging to your output window. If you have to resort to mechanical cleaning, try a soft camera lens brush, extremely gently. Then follow up with an air blast. Don't use an air compressor, there can be oil particles in the discharge.
 

iknitsteel

New member
Joined
Dec 8, 2008
Messages
196
Likes
4
Points
0
I have that same problem with the scatter on the wall I too noticed that my window on the diode is dirty, my lens is clean but i did not cut out the back yet to see the quality of the beam. There is a better quality around your output if you dont cut the back but when you do you get a llittle more power but with choppiness around the beam.
 




Top