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paul
paul
17:52 Dec-02-2013
help on a few words

Hi could anyone describe in depth what distance focal length is/mean. Also what ffd and ofd mean and explanation. Thank you for any help much appreciated.

 
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anjafo
NDT Inspector
Norway, Joined Aug 2009, 204

anjafo

NDT Inspector
Norway,
Joined Aug 2009
204
19:50 Dec-02-2013
Re: help on a few words
In Reply to paul at 17:52 Dec-02-2013 (Opening).

Focal length im not 100% sure buy sound like something describing a UT probes beam.

Ofd and ffd are to do with RT and the distance between Object to Film Distance and I think Film Focus distance but I would use SOD Source to Object distance when calculating Ug Geometric Un-sharpness not FFD...



 
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