PanoTools:
Re: entrance pupil - nodal point
David Sykes 2004-Nov-11 18:19:52
Rik Littlefield wrote:
> An alternate approach using a laser pointer is illustrated at
> http://michel.thoby.free.fr/Liste-experiments1.html .
What does he mean by rotating the laser around itself ?
I don't quite understand the method.
As he says, he seems to be locating nodal points, not entrance pupils.
The laser beam is presumably heading towards the 'anterior nodal
point' (the front one !) and after refraction by the lens passes
nicely through the entrance pupil.
If someone can explain his method better, I will give it a go.
David Sykes
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