Blue Violet Laser
Blu-Ray vs. HD-DVD - pysical properties?
how does the blu-ray disk differ from HD-DVDs in terms of the physical properties. i understand that they both use the 405nm blue-violet laser, so what makes them different?
sorry, physical
They do use the exact same laser. In fact it was toshiba who developed the blue laser. Sony has just taken it, changed it slighty and said they developed it. The reason blu-ray has more storage is because they have sat the laser closer to the disc and narrowed it to make it able to focus down to a finer point than the blue laser in toshiba hd dvd players which is further away from the disc. What does this all mean? Blu-ray is more expensive than HD DVD and can thus make sony and the movie companies more money.
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