I wrote

> at mirrors (specifically the scanner from a laser printer) but would
prefer
> to avoid the extra power requirements and moving parts. Audible noise
> and/or vibration are considerations, as well as obtaining the most even
> light spread possible

Meant to mention that the other main objection to scanning-type lines is
that this will produce a fast moving dot. As the detectors may come in
from below or above and at any point at any time, the line needs to be
omnipresent, particularly as I want to use a carrier frequency. A weak
beam I can compensate for, a dot that ain't there I can't

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