| Autor: |
D. Dvornikov, E. Walker, S. Esener, P. Rentzepis |
| Rok vydání: |
2003 |
| Předmět: |
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| Popis: |
Technology has been developed to enable recording and reading of optical disks having many layers. The approach selected relies on recording bits in a volume by using single beam two-photon recording. A volumetric bit is written in the volume of a molded photochromic dispersed organic polymer only at spatial locations where the recording beam has sufficient photon energy. Data recording is based on two-photon absorption, by which one molecule is excited into a higher state by absorbing the combined energy of two photons. Under this program, the following key sub-system components were developed: (a) Materials with high sensitivity and transparency that can be fabricated into a disk form. (b) Recording and read-out heads that are capable of parallel operation while minimizing interlayer cross-talk. (c) Focus and tracking servo systems that position the heads over the desired data track and layer. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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