Re: [photo-3d] DOF

["Don Lopp" <dlopp@xxxxxxxxxxxxxxx>]

Reguarding resolution by projection I have never been able to see 60 lines
per mm on a stereo projection screen much less 50 lines per mm DON
----- Original Message -----
From: "Dr. George A. Themelis" <drt-3d@xxxxxxx>
To: <photo-3d@xxxxxxxxxxx>
Sent: Saturday, January 06, 2001 8:23 AM
Subject: Re: [photo-3d] DOF


> Hello Tony,
>
> You bring up an interesting issue by relating the resolution
> with the viewing conditions.
>
> >My Zeiss lenses on my projector will only resolve 60 lpm - after all,
> >they are projector lenses.
>
> It is interesting that you mention projection lenses as
> an example of a high-resolution system.  Because in my
> mind, projection is the least demanding viewing method
> in terms of resolution.  A number of problems:  Distance
> of viewer from screen is usually large, resulting in
> a smaller image.  Lenticular screen is not smooth but
> has ribs.  Two pairs of polarizing filters.  Questionable
> projector focusing.
>
> I have slides which are definitely out of focus when
> viewed in my Realist red button viewer, but appear
> sharp under normal projection conditions.  I was
> thinking that if good projected slides was my main
> goal, I should not be rejecting anything viewed in
> a viewer.
>
> George
>
>
>
>