Re: R.B.T Mounts

[P3D Peter Homer <P.J.Homer@xxxxxxxxxxxxxxxxx>]

>I understood that the idea behind the black and white mounts of R.B.T was
>to have the white side towards the lamps to reflect as much heat as
>possible and the black towards the projection lens to reduce reflection and
>glare between the slide and lens. This arrangment of a white/light side and
>a black/dark side is used a lot on plastic 2D projection slides R.B.T just
>seem to be the first to use it for stereo . The white side does also
>transmit quite a lot of visible light and heat or Infra Red could be
>transmited more or less ,if more some of it may get through to the dark
>side and be absorbed but the fact that something is black only means it
>absorbs a lot of all the visible wavelenths. It may or may not absorb UV
>and /or Infra Red to any extent . If the heat is transmited from the white
>to black side by conduction rather than transmission of radiation then
>being black would help to re-radiate the heat and matt would be better than
>gloss black. The R.B.T mounts are however slightly gloss as you can see a
>reflection of the slide in the bevel around the window in a viewer with the
>black side towards the lenses .           P.J.Homer



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