Display holograms are widely used as a powerful tool
wherever an audience needs to be reached. They are popular and used
frequently for eye-catching displays at trade fairs or presentations-a truly
unique and amazing way to present objects, corporate images, educational
materials and many more. This type of hologram is recorded on to a
photographic glass or film plate. The photograph of a virtual object
reproduces real 3D magic in display hologram. Display holography is
basically a large-scale holography which can play a vital role to get the
impact and attention you have been seeking.
As it is, we all know that holograms are used for that "extra"
effect and look, and display holography enlarges this effect many times
over. If you need to grab a anyone's attention then display holography is
your all-time solution.
Display holograms have certain characteristics like as
follows:
- Exclusivity
- High artistic value
- Extreme plastic representation
- Availability in various sizes starting from a small stamp size image
to the size of an entrance door or even more.
The striking three dimensional properties of holograms
make them ideal for displays. Display holograms can produce spectacular
displays for educational, medical, scientific, artistic and commercial
purposes. Holographic displays have one great advantage of avoiding the risk
of theft of art objects. The same object can be displayed at several places
at the same time, which in turn implies that there is much wider exposure of
rare items.
Display holograms are widely used in the following:
- 3D Poster & Display
- Product Enhancement
- Pop-up Display
- Sales Presentation
- Celebrity Product Endorsement
- Mixed Media Display
- 3D Portraiture: VIPs, Gods, Family, Celebrities, Children, Wedding
- Trade shows
- Store Fronts
- Science Centers
- Reproduction of Museum Exhibits and Archival Artifact
- Recording, Artistic Development & Teaching
- Museums
- Educational Institutions
- Lobbies
- Expositions
- Public Spaces
An ideal display hologram should meet certain
requirements, such as follows:
- White Light Viewable Image: The display holograms should be
preferably viewed with a light source which is white. Finite size of the
source creates blur in the image. When we talk about a typical white
light source, it is the sun. The sun light is equivalent to the case of
reconstructing a hologram from a distance or length of one meter using a
white light source of 9 mm diameter. The blurred image is around 0.6 mm
for an image point at distance of 10 cm from the hologram. In other
light sources, the apparent size of the source can be reduced.
- Focused Image: When the hologram is viewed by a white light
source, the image should appear to be well focused. The image is blurred
due to the finite size of the source and its spectral bandwidth. The
blurring of the image increases with the increase in the distance of the
image point from the hologram. The average distance of the image from
the hologram can be minimized. This is done when the image straddles the
hologram plane.
- Wide Field-of-View: The field-of-view of the hologram should
be wide to allow a large parallax. The vertical field-of-view may be
restricted but the horizontal field must be large.
- High Resolution: The display hologram should produce an image
with excellent sharpness.
- Low Image Aberrations: The image of the display hologram must
be aberration free and without distortions. The image should not move as
the observer moves up or down or sideways in the field.
- Low Background Noise: Background noise has a drawback of
reducing the contrast of the image. The processing chemistry should not
introduce scattering noise. Background noise (flare light) is also
introduced by Interference between light scattered by different parts of
the body.
- True Color: The display hologram should produce the image
with true color. For monochrome object, while a display with only one
color gives satisfactory results for many purposes, the addition of
false colors can improve the display.
- Ambience: Another important requirement is that hologram
should display the image as acceptably bright-with proper contrast in
high ambient light brightness.
- Hologram Durability: The display hologram medium should be
resistant to
- humidity
- heat
- temperature
- intense light
- abrasion