My New 2W 635 Cmount

[ElektroFreak]

Can you post a pic of the diode? A FAC lens is a tiny piece of fiber across the face of the diode chip. It's very small and easily missed.

 

[k1kb0t]

Is that what TEM 22 looks like?

Jon

I know how un-beautiful a square beam is.. really, though, it's all about personal taste.

I have a 650nm CNI labby that is multimode.. square beam with stripes through it. Very lovely to behold. (not really, but it does the trick..)

(pic was taken by FrothyChimp)

Thought I'd post a pic for those who might not know what I'm describing..

 

[ElektroFreak]

I guess you could say it's TEM30, but really with diodes I don't believe it's the same as gas and solid state lasers. With a diode there are actually several emission regions side by side in the diode itself. Basically you could say in this case that there are four lasers together in one diode chip.

 

[digital_blue]

I don't think mine has a fast axis lens, where do I get one? And how about these prisms and lenses? I want to get somewhat of a beam out of this

IIRC, you cannot install a FAC lens yourself; it takes more precision than what most people are capable of...

Your best bet may be to use several lenses to get a half-decent beam...

 

[ElektroFreak]

Worst case scenario is you'll need a cylinder lens of some sort. It won't be quite as good as a true FAC lens, but it would work.. But that's only for the fast axis. Then you have to worry about the slow axis. I'm pretty sure all you'd need for that is a convex lens. Gooey just laid it out pretty well a few posts back..

 

[heruursciences]

It is relatively easy to collimate your c-mount- You need to use a cylinder lens and a correctly chosen aspheric lens. The longer focal length you use the better collimated your beam will be but you will also make the module physically bigger.

First correct the beam to a square dot using a FAC or a very short focal length cylinder lens then collimate the square beam to a square dot with your aspheric. If you have a short FL aspheric and longer focal length cylinder lens you can do it that way too.

FWIW you can use a mereidth glass lens or an axiz glass lens to collimate c-mounts with integral FAC lenses, but you will need to machine the brass part down a bit to get it into the working range OR build your own custom monting The trade off is BIG BEAM at apreature= Less power+ VERY GOOD and low divergance; Small beam at aperature= More power+Wide vivergance about 2mr with a cheap axiz lens. I found that the lenses from old flatbed scanners work VERY NICE as collimators for output beams about 1/2 inch diameter with very tight collimation.

Hope this helps.

 

[potatorage]

Hey, Where would the lenses from the flatbed scanner be found? I don't remember having any when I took apart my scanner, it is pretty old. I don't mind big beam as long as it's reasonable. Pm sent about the etc lenses

 

[potatorage]

Picture
This is in a brightly lit room, although the picture doesn't show it

 

[Benm]

I guess you could say it's TEM30, but really with diodes I don't believe it's the same as gas and solid state lasers. With a diode there are actually several emission regions side by side in the diode itself. Basically you could say in this case that there are four lasers together in one diode chip.

It could well be TEM30 comparable to any other laser.

Often, these higher power diodes have a continous emitting area, but it is larger than the wavelength allowing a transverse mode pattern to form. If the active region has a line cross section, thinner than the wavelength, but also longer, it will result in TEMx0 patterns.

 

[potatorage]

Where can I buy the cylinder and aspheric lens?

 

[Airsoftlaser]

Where did you get the diode?

 

[Krutz]

You'll probably want to talk to heruursciences. He Has collimation lenses and cylindrical ones that help to correct multimode beam output.

..was the 5th post here! come on, people at least try!

manuel

 

[bryce007]

I'm curious to see if you tried the aixiz glass lens yet.