A review of the applications of holography to commercial products is presented. This review is performed on application on display devices such as liquid crystal display devices where the inclusion of holographic optical elements has been successful. Works are focused on light coupling, reflectors, diffusers and light guides.
A diffusive film characterized with a directional property was developed. This new type of diffusive film is achieved
with a new technology derived from holography. Directionality of diffusive film is characterized because it diffuses the
light from the determinate angle strongly more than other angles.
This discriminative property is consequence of the diffusive film structure that consists of different index transparent
materials.
Additionally, The film is a volume type diffuser, and the surfaces are almost flat so it is possible to laminated it to
various part of other elements without remarkable affecting the diffusing properties of the film. Moreover, durability of
this film is actually enough to consumer applications.
With these remarkable properties, this diffusive film can widely applied to display systems etc.
A new type of Grating Image we dominate as `Sparklegram' is presented. The Sparklegram is characterized because it provides high quality and better design flexibility. These features are achieved by constructing it with shaped dots as desired. Each dot can be designed as an individual shape, for example, a star or a triangle. As dot shapes, we can use not only geometric patterns, but also some kind of symbols. Not only flexibility of each consists dot shape, but also the quality of reconstructed image is remarkably increased too. Because of these features, the constructed image with the new type of Grating Image, Sparklegram has high quality and high flexibility. It can be applied to security use, for example on credit-cards, tickets, etc., and also can be applied to the package of software products, CDs, videos and other kind of items requiring security. And with these features of flexibility and high quality, Sparklegram has also advantages to be applied to other use, for example amusement use, comics and game characters' goods and packages.
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