do i have to worry .. diffraction

[dark racer]

so when i wanted to clean my lens i discoverd that without a lens it has defraction .. or a water ripple effect
do i have to worry about this ? or is it harmless ..
i know i did not have this problem before and with the lens on there is no problem . it's a nice clean beam and point

another example of my problem but from wiki

 

[Speedy78]

Is it a 520? There may be some dirt or debris on the diode window.

 

[Smeerworst]

Welkom op het forum..

''Welcome to the forum''

More info is a must, as in what laser are we speaking about... to start with.

This , so we can rule out some quick facts etc.. and start from there.

 

[trencheel303]

Is that water rippling effect not caused by the laser running in a mode other than TEM00, or mode hopping?

this image (and link) explains a bit about it:

http://laserpointerforums.com/attachments/f45/18127-strange-tem-mode-my-x125-tem_modes.jpg

http://laserpointerforums.com/f45/strange-tem-mode-my-x125-31036.html

 

[hwang21]

Could be a bunch of different things... doesn't really look like a mode shift though, looks more like some kind of dust/debris

 

[dark racer]

wauw alot of answers ..

ehm it's this one

it's a 100mw 532nm laser from warnlasers
i had a tem problem before, no it is still tem 00
i think it is dirt or something but i am to afraid to do anything to it because i cannot afford a new one and with the lens on there is no problem ..

i had an earlyer post
"http://laserpointerforums.com/f45/i-am-noob-please-help-80217.html"
where it i got a replacement because they sent me a broken one .

 

[dark racer]

ps ik kan ook gewoon nederlands als dat makkelijker is

ignore this if you cannot read it

 

[Speedy78]

It could be the OC inside below the focusibg lens. Have you tried cleaning that?