T3D Re: Interocular question

[Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Tue, 9 Mar 1999 
>From: Bruce Springsteen <bsspringsteen@xxxxxxxxx>
>.................
>Measuring my own interpupillary with a mirror and a ruler seemed an
>easy trick at the time, but I wonder if I was wrong.  Is that too
>imprecise a method for +/- .5mm accuracy?  Just a side question.
>
>Bruce  


*****  I think that your method is inherently very accurate. The reflective
surface of the mirror guarantees a perfectly perpendicular viewing angle at
each end of your measurement. That's far more precise than any ordinary use
of a ruler without a mirror! Selecting a mark at the center of the pupil
should be pretty easy and accurate too. From my own work in QC operations, I
would expect at least +/- .5mm if not better. You can improve the accuracy
by consistent use of a magnifying glass of some sort.

Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


------------------------------

End of TECH-3D Digest 467
*************************