Editing Signal beam

{{Short description|Laser beam used to write holograms}}
{{Unreferenced|date=December 2009}}
A '''signal beam''' or '''object beam''' is one of at least two [[laser]] beams used to write [[hologram]]s.  The signal beam is the beam that carries the information to be stored in the hologram.  In the case of a holographic picture, this beam is reflected off the object being recorded, into the media.  In the case of holographic data storage, the beam has some kind information encoded into it (for instance, it can be sent through a [[Transparency (optics)|transparency]] or a [[spatial light modulator]]).

The other beam necessary to write a hologram is the [[reference beam]].

{{DEFAULTSORT:Signal Beam}}
[[Category:Holography]]
[[Category:Laser applications]]


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