[Ronja] TX Head design question...

[Gregory Maxwell]

On Sat, Sep 6, 2008 at 6:20 PM, Gyurkó Martin <asteri_x at freemail.hu> wrote:
> Hi!
>
> in the early years, when Laser printers were born they had a quarz
> crystal, in which acustic wawes were induced. these wawes acted as a
> diffraction pattern to the laser, and this diffraction was steering the
> laser on different points on the paper, or was switching the laser when
> the LD was too slow.
> This is only working cool if the light is monocromatic.
> LEDs are unfortunately not.
> Also these crystals are extremely expensive.

AOM  - Acoustic Optical Modulator.

And yes, you can get ones that operate at 10MHz. But they are
expensive, and need to be used with narrow band light.

They were, at one time, used for communications too.

Not really realistic for RONJA.