PPT - Holography - Civil Engineering (CE) PDF Download

 Page 1


HOLOGRAPHY
Page 2


HOLOGRAPHY
Holography: Means
2
¨ Holography (from the Greek,  whole + write)
is the science of producing holograms
¨ Holes-Whole and Gramma-massage
¨ It is an advanced form of photography that
allows an image to be recorded in three
dimensions.
¨ The technique of holography can also be
used to optically store, retrieve, and process
information.
Page 3


HOLOGRAPHY
Holography: Means
2
¨ Holography (from the Greek,  whole + write)
is the science of producing holograms
¨ Holes-Whole and Gramma-massage
¨ It is an advanced form of photography that
allows an image to be recorded in three
dimensions.
¨ The technique of holography can also be
used to optically store, retrieve, and process
information.
History of Holography
3
¨Invented in 1948 by Dennis
Gabor for use in electron
microscopy, before the invention
of the laser
¨Leith and Upatnieks (1962)
applied laser light to
holography.
Page 4


HOLOGRAPHY
Holography: Means
2
¨ Holography (from the Greek,  whole + write)
is the science of producing holograms
¨ Holes-Whole and Gramma-massage
¨ It is an advanced form of photography that
allows an image to be recorded in three
dimensions.
¨ The technique of holography can also be
used to optically store, retrieve, and process
information.
History of Holography
3
¨Invented in 1948 by Dennis
Gabor for use in electron
microscopy, before the invention
of the laser
¨Leith and Upatnieks (1962)
applied laser light to
holography.
Conventional vs. Holographic photography
4
¤ Conventional:
n2-d version of a 3-d scene
nPhotograph lacks depth perception
nFilm sensitive only to radiant energy
nPhase relation (i.e. interference) are lost
Page 5


HOLOGRAPHY
Holography: Means
2
¨ Holography (from the Greek,  whole + write)
is the science of producing holograms
¨ Holes-Whole and Gramma-massage
¨ It is an advanced form of photography that
allows an image to be recorded in three
dimensions.
¨ The technique of holography can also be
used to optically store, retrieve, and process
information.
History of Holography
3
¨Invented in 1948 by Dennis
Gabor for use in electron
microscopy, before the invention
of the laser
¨Leith and Upatnieks (1962)
applied laser light to
holography.
Conventional vs. Holographic photography
4
¤ Conventional:
n2-d version of a 3-d scene
nPhotograph lacks depth perception
nFilm sensitive only to radiant energy
nPhase relation (i.e. interference) are lost
Conventional vs. Holographic photography
5
¨ Hologram:
¨ Freezes the intricate wavefront of light that
carries all the visual information of the scene
¨ To view a hologram, the wavefront is
reconstructed
¨ View what we would have seen if present at
the original scene through the window
defined by the hologram
¨ Provides depth perception