Alaskan
0
- Joined
- Jan 29, 2014
- Messages
- 12,031
- Points
- 113
Steve, I agree, A FAC must catch all of the beam, if they didn't no one would use them.
From how I see this now, there is no need to have a second (one axis collimating) cylinder lens when using a FAC mounted at the emitter because neither axis have been collimated yet.
When using a cylinder pair, the input to the pair is already collimated, and then just one axis is expanded, thus the second lens in a cylinder pair is curved to collimated the expanded axis alone, the axis which is not expanded and already collimated is not affected much by either of the cylinder pair lenses.
At least, that is how I see it now, anyone? Makes sense to me. Cyp., where are you brother of the light? Diachi? MIA for both of you for awhile. Going the way of the RHD? Miss you guys, miss him too. Too many old members inactive.
Edit: My answer to Steve turns out to be redundant to the posts which followed, I answered him before seeing there were more posts from both RCB and CDBEAM which were pointing out the same info. I also reduced some of the text in this post because I essentially said the same thing two different ways.
From how I see this now, there is no need to have a second (one axis collimating) cylinder lens when using a FAC mounted at the emitter because neither axis have been collimated yet.
When using a cylinder pair, the input to the pair is already collimated, and then just one axis is expanded, thus the second lens in a cylinder pair is curved to collimated the expanded axis alone, the axis which is not expanded and already collimated is not affected much by either of the cylinder pair lenses.
At least, that is how I see it now, anyone? Makes sense to me. Cyp., where are you brother of the light? Diachi? MIA for both of you for awhile. Going the way of the RHD? Miss you guys, miss him too. Too many old members inactive.
Edit: My answer to Steve turns out to be redundant to the posts which followed, I answered him before seeing there were more posts from both RCB and CDBEAM which were pointing out the same info. I also reduced some of the text in this post because I essentially said the same thing two different ways.
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