My Monster 6+ watt Laser Build Has Started !

[Alien Laser]

RC on the 4th picture are you on the roof ! :friend:

 

[Accutronitis]

It doesn't say delivered, just inbound from LA and was suppose to be delivered on the 1st.

I guess what I did might be called spacial filtering, I used a 1 inch piece of back rubber hose and made sure it was straight and screwed that into the end of my laser and now my beam & dot is clean as can be, Not that is was bad to start with but now there is nothing but the beam leading to a clean dot !

 

[Alien Laser]

Accutronitis may i ask what the purpose is of the garden hose !in the lasers lens op:

 

[Accutronitis]

Accutronitis may i ask what the purpose is of the garden hose !in the lasers lens op:

Well it's not "garden hose" and it's defiantly not "in the laser lens" but if you would like a straight answer you could try rephrasing the question ?

 

[RedCowboy]

RC on the 4th picture are you on the roof ! :friend:

No I'm at my 2nd story side window that overlooks my grill area, also I only aim lasers in my yard and at distant trees, I stay out of the sky these days.

@ Accutronitis: Yes I use lens flare hiders made of rolled up black cardstock, it blocks lens flare as I would not want a passer by to see the flare and mistake it for being targeted.

You can easily slip them on and off, my camera turns down it's gain automatically to compensate but you can see the beam looks dimmer because the flare is causing the camera to shunt and the lens has a bright flare that would produce on overdriven line if I were taking video.

 

[Accutronitis]

No I'm at my 2nd story side window that overlooks my grill area, also I only aim lasers in my yard and at distant trees, I stay out of the sky these days.

@ Accutronitis: Yes I use lens flare hiders made of rolled up black cardstock, it blocks lens flare as I would not want a passer by to see the flare and mistake it for being targeted.

You can easily slip them on and off, my camera turns down it's gain automatically to compensate but you can see the beam looks dimmer because the flare is causing the camera to shunt and the lens has a bright flare that would produce on overdriven line if I were taking video.

Yes, Yes that's exactly what I'm doing and why ! That simple thing really cleans up the beam junk (what tiny bit there is) and it does the same for the dot !

"lens flare hiders" I have to remember that !

 

[diachi]

I guess what I did might be called spacial filtering

It wouldn't be called that.

It may clean up some of the speckle around the spot from dirt and such on the lens, but it isn't spatial filtering. Not saying that it isn't useful though, it is! I do something similar (in principal, not execution) when photographing beams from the far field looking towards the laser, it reduces lens flare seen by the camera greatly. Gives you a better picture and a clearer beam, especially with long exposures.

 

[Accutronitis]

It wouldn't be called that.

It may clean up some of the speckle around the spot from dirt and such on the lens, but it isn't spatial filtering. Not saying that it isn't useful though, it is! I do something similar (in principal, not execution) when photographing beams from the far field looking towards the laser, it reduces lens flare seen by the camera greatly. Gives you a better picture and a clearer beam, especially with long exposures.

I guess you just missed my last post ? lol

 

[diachi]

I guess you just missed my last post ? lol

No, I was typing my last one when you posted yours. I don't see how it makes my comment any less relevant (assuming that's what you're getting at)? :thinking:

 

[RedCowboy]

I am happy to learn the proper terminology, I suppose my out side blocker on the 6X unit could be called a splash blocker, lens flare hider I believe is technically correct for my lens tube over the thumb wheel unit, but if not I am happy to be educated. :beer:

We are all working together and sharing for the good of our hobby and our mutual safety, there is no shame in learning how to sound like we know what we are talking about, I welcome any/all correction from those in the know.

 

[Accutronitis]

"It wouldn't be called that"

Buy the time you posted that I had already posted that I knew that by posting

"lens flare hiders" I have to remember that !

So that's how it made your comment less relevant, You see if you had seen my last post before making yours you would have known that I already knew it "wouldn't be called that" and there for there would be no need for your comment, Do you understand now ? did I really need to spell that out or were you just messing with me ?

 

[diachi]

I guess you just missed my last post ? lol

I am happy to learn the proper terminology, I suppose my out side blocker on the 6X unit could be called a splash blocker, lens flare hider I believe is technically correct for my lens tube over the thumb wheel unit, but if not I am happy to be educated. :beer:

We are all working together and sharing for the good of our hobby and our mutual safety, there is no shame in learning how to sound like we know what we are talking about, I welcome any/all correction from those in the know.

A beam mask would probably be a more correct term for this, which is pretty much what you guys are calling it.

Spatial filtering will essentially homogenize the beam, removing aberrations, artifacts and higher order modes in the beam caused by resonator design or imperfections in optics.

Here's an example, before and after spatial filtering.

With the setup your guys are using you'll still have those original beam artifacts. A spatial filter would also filter the artifacts that you guys are, but you increase complexity and lose some power (as with any beam manipulation that is performed).

Buy the time you posted that I had already posted that I knew that by posting



So that's how it made your comment less relevant, You see if you had seen my last post before making yours you would have known that I already knew it "wouldn't be called that" and there for there would be no need for your comment, Do you understand now ? did I really need to spell that out or were you just messing with me ?

Could you chill it with the attitude? :beer:

 

[Accutronitis]

A beam mask would probably be a more correct term for this, which is pretty much what you guys are calling it.

Spatial filtering will essentially homogenize the beam, removing aberrations, artifacts and higher order modes in the beam caused by resonator design or imperfections in optics.

Here's an example, before and after spatial filtering.

With the setup your guys are using you'll still have those original beam artifacts. A spatial filter would also filter the artifacts that you guys are, but you increase complexity and lose some power (as with any beam manipulation that is performed).

I get it and that all makes perfect sense to ! Thanks for explaining that, I really like to understand as much as I possible can for whatever it is I'm interested in at the moment.......

So dust partials on the lens not only disrupt light in it's path but also causes artifacts that move out from each dust partial further disrupting light that's away from the dust ? is that correct ?

Could you chill it with the attitude?

Honestly there was zero attitude involved in that statement and I mean zero, I'm sorry if you seen it that way ?

 

[diachi]

I get it and that all makes perfect sense to ! Thanks for explaining that, I really like to understand as much as I possible can for whatever it is I'm interested in at the moment.......

Any time!

A lot of folk are using these techniques (i.e spatial filtering) in their laser projectors to improve beam quality. Usually in conjunction with some sort of fast axis correction, either cylindrical lens pairs or anamorphic prism pairs. The results are really quite nice, just not really practical for a handheld format.

 

[RedCowboy]

Beam mask, ok cool.

I had seen Planters using razor blades attached by magnets to bolt in blocks in his optical train to clean up overspray of mitsu reds, I think he called that spacial filtering, but I see that it's more than being internal or external now.

Beam mask sounds right and is easier to understand. :beer:

 

[Accutronitis]

Beam mask, ok cool.

I had seen Planters using razor blades attached by magnets to bolt in blocks in his optical train to clean up overspray of mitsu reds, I think he called that spacial filtering, but I see that it's more than being internal or external now.

Beam mask sounds right and is easier to understand. :beer:

Agreed !