Reference beam: Difference between revisions
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{{ | {{more citations needed|date=June 2025}} | ||
A '''reference beam''' is a [[laser]] beam used to read and write [[hologram]]s. | A '''reference beam''' is a [[laser]] beam used to read and write [[hologram]]s.{{sfn|Vacca|2001|pp=4, 31–32}} It is one of two laser beams used to create a hologram.{{sfn|Vacca|2001|p=4}} In order to read a hologram out, some aspects of the reference beam (namely its [[angle of incidence (optics)|angle of incidence]], beam profile and [[wavelength]]) must be reproduced exactly as when it was used to write the hologram. As a result, usually reference beams are [[Gaussian beam]]s or [[spherical wave]] beams (beams that [[Radiation|radiate]] from a single point) which are fairly easy to reproduce. | ||
The other beam used to write a hologram is the [[signal beam]] or object beam. | The other beam used to write a hologram is the [[signal beam]] or object beam.{{sfn|Vacca|2001|p=4}} | ||
==References== | ==References== | ||
{{reflist}} | {{reflist}} | ||
===Works cited=== | |||
* {{cite book |last=Vacca |first=John R. |date=2001 |title=Holograms & Holography: Design, Techniques, & Commercial Applications |publisher=Charles River Media |isbn=1-886801-96-7}} | |||
{{DEFAULTSORT:Reference Beam}} | {{DEFAULTSORT:Reference Beam}} | ||
[[Category:Holography]] | [[Category:Holography]] | ||
{{optics-stub}} | {{optics-stub}} | ||
Latest revision as of 12:44, 18 June 2025
Template:More citations needed A reference beam is a laser beam used to read and write holograms.Template:Sfn It is one of two laser beams used to create a hologram.Template:Sfn In order to read a hologram out, some aspects of the reference beam (namely its angle of incidence, beam profile and wavelength) must be reproduced exactly as when it was used to write the hologram. As a result, usually reference beams are Gaussian beams or spherical wave beams (beams that radiate from a single point) which are fairly easy to reproduce.
The other beam used to write a hologram is the signal beam or object beam.Template:Sfn
References
Works cited
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