Opteria represents Lintec's state-of-the-art precision thin film coating technology
  LINTEC Corporation
Advanced Materials Operations [Top Page] Sitemap Japanese
  LINTEC Corporation Advanced Materials Operations
Advanced Materials Operations [Top Page] > Opteria > What is Blu-ray Disc?
What is Blu-ray disc?
Blu-ray is the name of the next-generation optical disc format featuring substantially increased recording capacity jointly developed by nine manufacturers in Japan, Korea and Europe, including Sony, Matsushita Electric Industrial and Philips. The format has a storage capacity of 27GB (single-side/single-layer type), approximately six times more than that of the current DVD format (4.7GB).
Six Times the Storage Capacity (single-side/single-layer type) of DVDs
The most distinguishing feature of Blu-ray discs is that it can record digital high vision broadcasts for over two hours at constant image quality. Even more advances are being made to increase storage capacity with additional layers such as dual-layer and four-layer types.
Disc Structure and Cover Layer

Blu-ray discs use a laser of shorter wavelength (405nm) than that of DVDs (650nm). This, together with a higher numerical aperture lens, makes it possible to focus a smaller laser spot (approximately 19% of the area) for large-volume recording capacity. To ensure stable operation and prevent disc incline or warping during the recording process, the distance between disc surface and recording layer must be shortened.

In contrast to the DVD structure, in which two layers (each 0.6mm thick) are pasted together, the Blu-ray disc is structured with a thin transparent cover of 0.1mm thickness formed on the surface of a 1.1 mm thick substrate.
PageTop
OpteriaOptical Display ProductsHard Coated Film for FPDBlu-ray Disc ProductsCover Layer Sheet for Blu-ray Discs What is Blu-ray Disc?For inquiries regarding this productWhat is Opteria?Opteria[Top Page]
 
© Copyright Lintec Corporation. All rights reserved.  
Opteria