Convex or Concave ?

[Viewmaster]

Just taken a look at the TV volumes, "Television Today."
Here are some photos.
Steve, note that there is a reference to CONCAVE mirror surfaces
and the diagram also shows concavity and not convex.
I cannot find any reference to convex mirrors !
The chart is interesting showing viewing distance/lamp position for flat and curved mirrors.

[Panrock]

Thanks for this. Getting one's head around the optics for this should be simple - but I find it difficult! That's why I am proceeding step-by-step here and will develop the slats' final figures on the basis of experience gained with test pieces, which cost only a few pounds.

From bench trials, the wider deflection angle required for closer-in viewing did indicate 'convex' for me. Closer-in viewing is required here since, with the m/s only rotating by 3 degrees for each line, the reflected picture otherwise just looks too small.

I'll only be able to see what really happens next week, when I have the first test pieces back... Episode 2 then!

Steve O

[Panrock]

Viewmaster has been proved right. The physics hasn't changed since 1932... concave it will have to be! The question now is how concave and how this setting will interact with viewing and lamp distance. I'll be continuing this discussion in the 'big' thread...

Steve O