Holography Articles- Article 1: A basic idea about Holographic Windows
- Article 2: Household items in holography
- Article 3: Use holography in packaging to increase sales
- Article 4: How to apply Tamper Evident Labels?
- Article 5: The Use of 3D Holograms to Bust Forgers: A New Technique
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Article 1: A
basic idea about Holographic Windows
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With the advancement of holographic technique, it has now become possible to control the reconstruction of a hologram's object wave in a common desktop-window environments. The holographic emulsion is transparent if it is not illuminated when mounted in front of a screen. In this case, an interaction with software applications on the desktop is possible in a familiar way and the entire screen content is visible.
The holographic content whether visible or not is always located at a fixed spatial position within the desktop. An application that renders the graphical content can run in a 'Windows' mode, thereby covering an arbitrary area on the desktop behind the emulsion. If the position and the dimensions of the graphics window are known, the projector-based illumination binds the reference wave to the emulsion portion that is located directly on top of the underlying window. Thereby, all the techniques are limited to the window's boundaries. The remaining portion of the desktop is not affected by the illumination-the holographic content or graphical content. The graphical content can also remain registered with the holographic content. This effective technique leads to a seamless integration of holograms into common desktop environments. We can temporarily minimize the "holographic window" or align over the main focus while working other applications.
The figure shows a holographic window on a desktop together with other applications. It shows an optical white-light reflection hologram of a dinosaur skull with combined graphical 3D soft tissues.
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Article 2:
Household items in holography
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According to a recent research, there are certain items of regular household use which can be used in holography, thereby saving you from lab expenses. The following examples will be of great help to you to make holograms at home but of course with proper care and safety measures.
- For blocking stray light, you can use black foam
board.
- A thick piece of glass can be used as a beam
splitter. Place a small piece of electric tape over the glass to block
the secondary reflection off the back.
- Using old 8 mm movie cameras, you can make a shutter.
They consist of a low voltage electric shutter. You can remove this and
set up a circuit with a switch and the original voltage of the camera.
- The dampening mechanism between a holographic table
and the support legs can be attained by using rubber inner tubes.
- A slab of granite can be used as a holographic table.
- Most fax machines or photocopiers contain front
surface mirrors.
- To dry a piece of holographic film or plate after
processing, you can use a hair dryer.
- You can use a microwave to heat the deionized or
distilled water needed for mixing up processing chemistry.
- Two pieces of window glass pane and binder clips can
be used to combine a piece of holographic film. This will enable to
hold the film rigid and flat.
- Clothes pegs can be used to hang up films to dry. Using the pegs, clamp the film at two corners on the line, clamp two more at the bottom corners to keep the film straight while drying.
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Article 3: Use
holography in packaging to increase sales
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There is no doubt about the fact that packaging has a direct impact on sales-an attractive packaging can surely influence consumer's perception of the product and build brand recognition. There is again no doubt about the fact that incorporating holography onto package design is a wonderful way to make your package look attractive and authentic, thereby increasing sales. The question is whether incorporating holograms on package is expensive or not. To be frank, holography increases the overall cost of producing a package but this cost is offset by the additional sales of that product. The use of holograms in the package make your product look more interesting to the customer with its added dimension of distinctiveness, its value increases and above all, it becomes a secured product, which in turn leads to brand promotion. The use of holograms on any package serves a multipurpose task of brand promotion, brand protection, security and of course increased sales.
For example: You visit a local store to buy a toothpaste and as you move to the toothpaste aisle, you go for those packages which come to life, and avoid those which fade into the background. SmithKline Beecham, Aquafresh, Colgate Palmolive are just a few of the companies who recognize the importance that holography plays in package design and perception.
Companies have today come to the conclusion that holographic packaging indeed heightens the success of new product launches, helps to differentiate their products at the point of purchase, allows brand owners to gain market share, retain their leading market position by establishing a stronger brand identity.
Holography provides the visual impact on a package that leads to increased sales and profit, and also justify the moderate increase in costs. Holography is indeed a cost-effective way to increasing sales.
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Article 4: How
to apply Tamper Evident Labels?
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The tamper evident hologram labels usually have a "dots" release pattern or words VOID, OPENED, etc. showing tampering. Under normal circumstances, the release pattern will appear when the label is removed after the label has been applied. However, there are certain conditions under which the tamper evident feature can be inadvertently activated during the process of affixing the label. We give below few tips to minimize pre-triggering of the tamper evident feature in labels:
Tip 1. Minimize pressure and contact with the adhesive side of the label. Manually remove the label using light pressure and transfer to your finger. Then, apply the label immediately to the intended surface. The tamper evident feature gets activated the label is positioned on your fingers for long time or if the adhesive side is handled with too much pressure.
Tip 2. When handling the labels, use skin moisturizer to the tips of fingers which will touch the adhesive side of the label. This will minimize the chance of activating the tamper evident feature during application. Otherwise use a rubber finger tip on the finger which is to touch the adhesive label.
Tip 3: Flag the label. In other words, peel back a portion of the liner to expose a small portion of the adhesive side of the label. You now affix the exposed portion of the adhesive to the intended surface. Next peel away the balance of the liner to fully affix the label.
Tip 4: Never use a metal or plastic instrument to affix the label. The hard and dry surface cause the tamper evident release to activate.
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Article 5: The
Use of 3D Holograms to Bust Forgers: A New Technique
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Thanks to whole team of physicists in Rome, Italy where scientistsdeclared a new technique that can discover and detect forged handwriting better than ever before. Now, because of efforts shown by all of them, forging bank checks and wills could reach near the word impossible.
Scientists involved in this new forgery detection technique were Professor Giuseppe Schirripa Spagnolo, Carla Simonetti and Lorenzo Cozzella from the Universita degli Studi "Roma Tre" in Rome. This detection technique constructs a 3D hologram piece of handwriting and examine tiny bumps and variations along its path. Two most common techniques used are image processing and virtual reality.
Till now, 2D level technique helps in detecting forged signatures usually done by professionals who analyze the chain of individual "strokes" in a piece of handwriting. Although, good forgery can go undetermined at the 2D level because it isn't always easy to detect the exact chain and sequence of strokes. Professors team in Rome, configure 3D holograms considered as path for a piece of writing, inducing an image on a computer that looks like a ditch or furrow.
Virtual reality and Image processing
Tracing is the most common technique mostly used by forgers, however two signatures are never never same in reality. Other than tracing, one more technique known as freehand method is used in which counterfeiter follows to copy that style and feature of handwriting which they are trying to copy. In both methods, it is almost unattainable for forger to generate same variation of pressure used by the original writer.
According to one of the professor, Schirripa Spagnolo , using image processing and virtual reality helps to determine presence of bumps at cross-over points and this in turn allow experts to easily determine sequence of strokes in a piece of handwriting and the signs of a forgery or original.
Also known as 3D Micro-profilometry technique, this method is used by Rome team to determine hundreds of dissimilar handwriting samples made by using a variety of different paper types and pens. Along with this, they have also addressed this technique to bank checks and wills in successfully detecting forgeries. Last but not least according to professor Schirripa Spagnolo, this technique is one of the most up coming way of detecting forged handwriting and also acts as a powerful tool for forensic experts around the world.
