Been Playing With some 638

[andy_con]

i feel a bit left out with all these builds threads been posted on the forum recently so -

been playing with some 638 diodes.





correction lens added for the below two pics



@ 18 metres

[tonyaztec]

Any chance of a shot of the setup with the corrective lenses in place.

Looking good, I'm waiting for the GB to complete then I can build a new red.

[andy_con]

um i dont to hand no, but just picture the top image with two lens in front of the beam lol ;-)

[tonyaztec]

I was lead to believe that that would not work as all the diodes are different distances from the corrective lenses, but it seen you have got good results Andy.

[steve-o]

Andy, are you using Daves & Lavalenses, or is this a top sekret build Lookin' good! .. unless this is a 63133 LD, in which case you're cheatng

[norty303]

Tony, I believe the critical distances are in relation to the 635nm G71 and 73 diodes, not the 638's, which can be stacked much like the 642's, 660's, etc

[flecom]

Tony, I believe the critical distances are in relation to the 635nm G71 and 73 diodes, not the 638's, which can be stacked much like the 642's, 660's, etc

I thought the G71/73 are 637 not 635?

[norty303]

Depends on the batch and running temp doesn't it? Theyall wander a bit, just like the 640/642, etc
MAybe I got it wrong, I thought the new diodes were being hailed as the new 635 without the flashlight beam.

Maybe Andy can clarify which diodes he's using. From the fact there are 3 diodes, I assumied it was the 'older' 638 diodes.

[tonyaztec]

Maybe Andy can clarify which diodes he's using

To be honest I thought they were the 71/ 73. Andy?

[norty303]

I thought the 63133 from the stacking arrangements. How complicated the life of a laserist is!