SBIR Phase I: Novel Coded High Density Optical Disk Data Storage

小型企业创新研究（SBIR）第一阶段项目研究一种新的编码和实现技术，用于高速高密度光盘数据存储。众所周知，传统的光盘存储是基于在光盘（如致密盘和DVD）中记录和读出二进制数据凹坑。因此，数据存储密度受到这些凹坑的尺寸的限制，由于衍射限制，这些凹坑可以被光学地记录和读出。这项研究探索了一种新的编码概念，并使用扩展的焦深衍射光学元件，以方便记录和读出许多位的数据在一个单一的存储坑。因此，可以显著地增加数据存储密度。新的方法可以使用与DVD相同的光学和运动扫描系统并使用商业上可获得的数据记录材料来潜在地达到50 Gbits/in的存储密度。因此，技术开发可以达到其近期成熟度。第一阶段的研究将证明所提出的新的磁盘存储概念的可行性。 这项研究亦会展示与现有数据储存技术的兼容性，并会根据一个新的编码概念，发展一个简单的概念验证高密度光碟储存原型。这种编码概念的实现可以显著地增加商业和军事应用的磁盘存储密度，例如计算机数据存储、联机存储、图书馆档案应用、医学应用的图像存储和处理、以及军事目标识别和快速访问大型智能数据库。

This Small Business Innovation Research (SBIR) Phase I project studies a new coding and implementation techniques for high-speed high-density optical disk data storage. It is well known that conventional optical disk storage is based on recording and readout binary data pits in an optical disk such as compact disk and DVD. The data storage density is thus limited by the size of these pits that can be recorded and readout optically due to diffraction limitation. This proposed research explores a new coding concept and uses an extended depth of focus diffractive optical element to facilitate recording and readout many bits of data in a single storage pit. The data storage density can thus be significantly increased. The novel approach can potentially reach 50 Gbits/in storage density using the same optical and motion scanning system as DVD and using a commercially available data recording material. Thus, the technology development can reach its near-term maturity. Phase I research will demonstrate the feasibility of the proposed novel disk storage concept. Compatibility with existing data storage technology will also be demonstrated.The research will develop a simple proof-of-concept high-density optical disk storage prototype based on a new coding concept. Implementation of such coding concept can significantly increase the disk storage density for commercial and military applications such as computer data storage, on-line storage, library archival applications, image storage and processing for medical applications, and military target identification and fast access to large intelligent database.