What is the hologram imaging technology
So what is the
holographic imaging technology? What
are the characteristics?
How to achieve the
image of dynamic
three-dimensional display of it? First, we need to learn more
about two important aspects of
holography and holographic
video display.
We know that, in order to express
the sense of
three-dimensional objects, the information objects of
the reflected light is also very important,
in addition to
outer surface the
light intensity information needs to be recorded, and both information is superimposed i.e. to achieve a planar
object plus shadow objects
dimensional sense (similar to that of the art in Still sketch of performance practices).
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Object Sketch in Art
Hologram is in photography while the two types of
information recorded at the same time to achieve. Using a laser as a light source, and light
from the source is divided
into two beams, a bunch fired directly photosensitive sheet, another bunch reflection object and then directed to the photosensitive
sheet. The two light beams
on the photosensitive sheet superposed
interference the photosensitive
extent of each
point on the photosensitive film is
not only with
the intensity with
the phase relationship
of the two light
beams with different. Holography
not only records the reflective intensity on
the object, the
phase information is also recorded. Compared with the ordinary
photography technology, holography technology recorded in the additional information, information amount
much greater capacity than the ordinary photo (hundred or even thousands of times or more).
The
display of the image
of the hologram,
is irradiated by
the light source on the hologram, the frequency of the
light source and
the transfer direction of this
beam with the reference beam completely,
as a stereoscopic image of the object can be
reproduced. Audience from a
different perspective, you can see
multiple sides of an object just visible
scratching, because the record only images.
Currently
the most commonly used light source
projector to light
source brightness is relatively stable, and secondly, the projector also has
a magnified image, as the very practical holographic
display.
Principle of hologram
imaging technology
In order to allow a more intuitive understanding
of the hologram technical
principles of the holographic image, following
a schematic presentation
to show how hologram is made.
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Hologram projection imaging done by projector
If we pay attention to the words, will find the
beginning of the article we provide the supermodel KateMoss
hologram video, a bracket around the image, in fact those are vitreous (high
transparency of the medium can be) a multi pyramid, holographic images via
computer transmission projected into the vitreous to the projector, then
through different angles of light diffraction to achieve stereoscopic images.
Because
simultaneously display all the
information of the various angles of the
object, therefore, look up to the same as in
the range of
sight like to
see a complete
picture of the
object, in order to achieve the
stereo effect.
Conventional 3D display principle
Compared
with the hologram
imaging technology, why in the
past we often traditional
3D display environment will need to use
special polarized glasses? This is related to its technical
principles.
LED-backlit 3D rear projection TV
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Need the help of polarized glasses
Everyone will pay attention to the words found in the above 3D hologram renderings
the instant fact, there are two groups of the screen at the same time, but when
not wearing polarized glasses, we see two pictures superimposed. In fact, this
is because the useof the left and right eye images
interactive display screen, the vertical sync signal switch as a shutter can be
reached in the purpose of the three-dimensional hologram imaging. Therefore, if
no wear special polarizing glasses or cover any one eye, then it can notbe synthesized in the human eye stereoscopic image.
Because the left and right eyes of the output picture must be provided at least
60 frames per second screen, so the vertical scanning frequency of the display
device must meet the 120Hz or higher.
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The effect of not wearing polarized glasses (two different pictures at the same time hologram display)
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3D display of the core equipment
Traditional 3D images by means of a vertical scanning frequency must reach 120Hz
or higher monitor
or TV or projector
There are also
polarized glasses, and specialized 3D graphics
driver. Further, since 3D
hologram image is the left and right eyes simultaneously displayed
in order to avoid the signal of the left and right eye deviation (image dislocation), but
also need the help of a signal synchronizer, the
right and left
eye signal synchronized. Above a group of pictures is the core component of traditional 3D display. Compared with holographic
technology, traditional 3D display technology involves
more hardware and software equipment, any equipment
problems are image
appears three-dimensional
imaging effect.