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picture1_Ppt On Laser 70387 | Holograms


 178x       Filetype PPTX       File size 0.14 MB       Source: pages.vassar.edu


File: Ppt On Laser 70387 | Holograms
record of light scattered from an object same light field is reconstructed without original object present requires laser for tight control of light source and light field appears 3 dimensional ...

icon picture PPTX Filetype Power Point PPTX | Posted on 30 Aug 2022 | 3 years ago
Partial capture of text on file.
  • Record of light scattered from an object
  • Same light field is ‘reconstructed’ without 
   original object present
  • Requires laser for tight control of light source 
   and light field
  • Appears 3-dimensional
  • ‘Object’ beam
    –Beam is spread and illuminates scene to be recorded
  • ‘Reference’ beam
    –Beam is directed to recording medium w/o scattering off of 
     object
  • Beams create interference pattern on recording medium
  • When light similar to reference is shined on developed 
   medium, it diffracts to produce a light field identical to 
   light field of object beam
       Holograms
     Transmission Hologram
  • Reference beam and object beam on same 
   side of holographic surface
  • Viewed by shining laser light through image 
   side
  • Must be viewed by same wavelength light 
   used to create
    Transmission Hologram
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...Record of light scattered from an object same field is reconstructed without original present requires laser for tight control source and appears dimensional beam spread illuminates scene to be recorded reference directed recording medium w o scattering off beams create interference pattern on when similar shined developed it diffracts produce a identical holograms transmission hologram side holographic surface viewed by shining through image must wavelength used...

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