roland's d-beam...?

[Paul Perry]

At 10:46 AM 21/09/99 -0500, Andy Sloane  wrote:

>As far as your optical elements, are you using photocells that generate a
>voltage, or CdS light-sensing variable resistors?  I'd think the latter
>would be cheaper and apply more directly.
>
In a working environment, I think any optical system has to use modulated
light sources and lock-in filters.
You wouldn't believe what ambient light looks like, spectrum-wise.
While the relatively slow response of CdS cells smoths out a lot, it still
wont do for stage work except very roughly.

paul perry (Frostwave P/L) Melbourne Australia