Holographic cards are
hard pieces of cardboard and papers that have shiny, metallic images on them. Sometimes
the images can move and even change into other images when the cards are
repositioned and turned toward certain angles. In other cases, the images do
not change, but appear three-dimensional, moving and turning in different
angles and looking like they float just above the card. Holographic cards are
also usually colorful, with the colors slightly changing if the card is moved
from side to side. One can think of a holographic card as an updated version of
a photograph that only captures an image in 2D.
The
concept of holograms can be likened to how the eyes see three-dimensional
images. The left eye sees an image in one angle, while the right eye sees the
image in another angle. When the brain receives these images, it combines them
and turns them into one 3D image. When the person shifts at another angle, the
brain does the same process and presents the image in another perspective.
Holographic cards operate in similar methods in that they record several angles
on paper, hence the 3D effects of the images.
Capturing
images on holographic cards can require certain tools such as the holographic film, a
red laser, mirrors, lenses, and a half-mirror, which is a glass with a coating
of silver on half of its surface. The red laser is aimed at the half-mirror,
making half of the light beam pass through the glass, and the other half is
then reflected to another mirror due to the silver coating. The reflected
half-beam is again reflected to another mirror, which then angles the said
half-beam to hit directly at the object. The half-beam then bounces from the
object towards the holographic film.
The
other half-beam that passed through the half-mirror is also reflected by
another mirror, which then angles the beam towards the holographic film as
well. The image on holographic cards is finally created when both the
half-beams hit the holographic film, producing the 3D image. In this way, both
the half-beams somehow act similarly as the eyes, seeing the image in different
angles through several mirrors.
To
create clear images on the holographic cards, it is best to do the whole
process in a very dark room. All the tools should also be placed on a flat
surface and must remain unmoved; even the slightest vibration from a footstep
or breathing can possibly distort the image on the card. Many holography studios
have customized tables that contain absorbers underneath to reduce vibration.
Holographic
cards have much usage, particularly for security reasons. Companies and
organizations issue holographic identification cards that are hard to copy by
counterfeiters. The hologram process can even place some data that only
computers can read, keeping private information as such.
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Barry Wong
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T:00852
35908239| F:00852 65593828 | E:sales01@fortunecardtech.com | U:www.fortunecardtech.com www.hkcardsfactory.com
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Fortune
Card-Tech Ltd
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Rm
1901, Wealth Commercial Centre, 48 Kwong Wa Street, MongKok, Hong Kong
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