Re: Viewing the Image

[David Dockstader <DRDOCK00@UKCC.UKY.EDU>]

Gene,
This sounds like a neat idea.  I think I'd try only one hole in the lens,
on axis.  What problems did you encounter?


On Thu, 27 Jun 1996 08:04:08 -0400 (EDT) Eugene P. Mosca said:
> I was teaching a lab in which the students were to observe images formed
> by lenses, not by observing an image on a screen but by looking upstream
> into the lens.  However, I found that students had difficulty determining
> whether or not they were seeing the image or the object.  It occured to me
> that if I drilled several holes through a plastic lens parallel with the
> axis, then the students could view both the object, through the holes, and
> the image, through the plastic, simultaneously, even if the image was
> virtual.  Also, for a virtual image a small indicator (post) could be
> placed on the same side of the lens as the object (and image) and the
> observer could locate the position of the image by repositioning the
> indicator and observing it, through the holes, and the image, through the
> plastic.  If the positions of the indicator and of the image coincide,
> no parallax will be noticed as the observer moves their head from side to
> side.
>
> When I tried drilling holes through the lens I encountered several
> difficulties and eventually dropped the effort.  Has anyone else
> experimented with this?  If so, were you successful?
>
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