Posts Tagged ‘Holograms

03
Aug
09

Holograms and Data Storage

Long time back, I had read a news article on how holograms could be used for storing data if that could be possible.

How Stuff Works claims that Holographic memory offers the possibility of storing 1 terabyte (TB) of data in a sugar-cube-sized crystal.

Wiki-ed it…

Holographic data storage is a potential replacement technology in the area of high-capacity data storage currently dominated by magnetic and conventional optical data storage. Magnetic and optical data storage devices rely on individual bits being stored as distinct magnetic or optical changes on the surface of the recording medium. Holographic data storage overcomes this limitation by recording information throughout the volume of the medium and is capable of recording multiple images in the same area utilizing light at different angles.

Additionally, whereas magnetic and optical data storage records information a bit at a time in a linear fashion, holographic storage is capable of recording and reading millions of bits in parallel, enabling data transfer rates greater than those attained by optical storage.

How Stuff Works says that

In a holographic memory device, a laser beam is split in two, and the two resulting beams interact in a crystal medium to store a holographic recreation of a page of data. The stored data is read through the reproduction of the same reference beam used to create the hologram.

Mast hai naa!!!

02
Aug
09

Holograms Replicable?

You see holograms everywhere… Drivers licence, deed, open a new mobile box and its hologram sealed, so is the drinking water that I buy… But what makes them non-replicable? is it just too difficult? or do we really even bother.

I went off searching for this and this is what I found

One interesting fact I found on How Stuff  Works is

If you tear a hologram in half, you can still see the whole image in each piece. The same is true with smaller and smaller

Now that gives me dope for another question (which I would probably figure out some other time) as to how is this possible? what kind of a technology makes it possible. Interesting it would be, to figure it out.

From what I understand, there are many types of holograms, there are many processes to make holograms.

Could not find much of information on Hologram Security. So visited a site of Hologram Manufacturer to find this.

holograms are virtually impossible to duplicate and to produce by average criminals. Therefore, they have become the integral part of many government and commercial security programs. They have been applied to documents, currency, ID cards and product labels. To further detert the counter-feiters, the holograms manufacturers, have added sequential, hidden text and other covert features to their security holograms. That’s why it is said that ” Security hologram is a unique optical security device that has combined the Physics and Optics to create a three dimensional image on a two dimensional surface that is used to protect the genuineness of the brand name and authenticity of a product against the spurious/ imitations/duplicates. “




So what’s this blog about?

Another attempt? Well yes. Attempting to figure out another sustainable model (there are some other attempts going on parallel-ly). Well, we have a lot of questions in mind. we read up stuff, we do some research to find answers to these questions. This is an attempt to publish that little 15-20 minute research.
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