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focus Shifter

ashutoshsingh

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Joined
Mar 4, 2019
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Hello guys, it might sound stupid but I need to confirm a silly doubt. Could anybody please explain me how this focus shift works in a scanning head of an additive manufacturing system? I know this consists of two lenses one convex and concave, we move one lens and the focal position of the entire system changes. but how does it actually work with f theta lenses? While calculating the spot size will this ( focus shifter lenses) would have any affect?? Thank You!
 

Lifetime17

Well-known member
LPF Site Supporter
Joined
Dec 15, 2014
Messages
5,167
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Hi,
Maybe Red Cowboy can chime in , he is fantastic with correcting divergence with these lenses. He has done some amazing work with them and always has something new to add.

Rich:)
 




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