Melles Griot Module lens

[frank_1257]

This is the stuff, lol.. (Greek) >>

[frank_1257]

Some of these companies have proven less than helpfull to me in the past in particular newport optics, but calling them all in rapid succession would have to shed some light on your determing that lenses parameters, although it might require sheer black boxing of the lens or lens combo. In otherwords presenting a light source with known beam characteristics and determining the result of passing through the unknown lenses.

Thanks, Frank, Good info. (I have read some of that before).
Actually I neet to match a lens ( a single lens- possibly a triplet or GRIN) not a lens combination as pictured. The FL=1-2mm , the Dia is about 7mm, the the lens thickness is about 8 mm; although it could be a lens combo, I dont know the NA and I cannot remove it from the housing to see if it is one lens or a combo. I was just wondering if anyone here had one of those modules and had any info on that particular lens. The prism pair is easily identifiable and re-creatable though, it's the lens that I was questioning if anyone had the specifications, or better a P/N.
Thanks.

[steve-o]

Re: Greek..
Yep, that's the shit I run up against everytime I try to go in deep into optics.
Well, anyway, I drew up a diagram of the lens and it's optical properties when a LD beam is shot thru it.. thought I saved it in .jpg.. lost it all... ahh well... will try again later I guess.. it's gettin' late.. zzzzzzzzz.. --

[frank_1257]

Re: Greek..
Yep, that's the shit I run up against everytime I try to go in deep into optics.
Well, anyway, I drew up a diagram of the lens and it's optical properties when a LD beam is shot thru it.. thought I saved it in .jpg.. lost it all... ahh well... will try again later I guess.. it's gettin' late.. zzzzzzzzz.. --

Yeah I called Newport once and mispronounced Fresnel Lens bout laughed me out of my chair nice um assinine folks I have been finding WONDERFUL article on collimating optics and launching into and out of fibers at a place called ozoptics.com I have run across the docs randomly in goggle searches. There is a lot to be said for searching the uspatent office uspto.com for patents on methods to correct astigmatism in diode lasers. hell find someone with some lasers and take the patent numbers and search them, I have had hell with lack of adobe flashplayer, quicktime( and associated TIFF file integral plugin support for IE7 x64), java, etc support on my X64 computer someone in fact, was it you? that turned me onto using google patents , that was very cool.

[steve-o]

I dont think that was me.. I dont think I've ever used the google patent thing. I'll give it a try.
I 've gone to the uspto site a few times, not for laser collimation tho..
I just recently learned that fresnel was pronounced frrr-nel, I used to say frez-nell. lol. I think that's right..(?) I may have to look it up to make sure..
I like the idea of using fiber-optic cable for collimation but it's so critical to get the end polished right and the cable diameter etc i dont think that I could do it. I now have a few ball lenses, I may try it again..
Think I'll go check out ozoptics.com ... Thanks Frank!

[steve-o]

Hup!! Got a response from Melles! It's a multi-element (like Frank_1257 pictured,) and its $240usd from Melles-G. Ive seen surplus for $90 tho (w/o AR coating) . The p/n if anyone's interested is 06GLC002/D.
It's an awesome lens assy for LD collimation imho.

[allthatwhichis]

Um, Steve, start from the beginning again for me... Is this the answer to al our 635nm problems?

[steve-o]

Hey, Aaron,
It is for me, 'cause I've got those 636nm diodes with 7 x 39 degree divergence. These lenses tame them down to good specs while capturing almost (if not all) the LD light output. It's no good for small galvo mirrors though because the output is too large; 5 x 8 mm (or 1 x 8 w/o the prism pair) at the lens aperature. Of course, without the prisms, you get a line at a distance instead of a dot. So, no, not the answer to the big 635 question... I wish it was .