Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2011-06-07
2011-06-07
Haley, Joseph (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
Reexamination Certificate
active
07957250
ABSTRACT:
A micro optical head is provided, which provides sub-wavelength focusing spot and very long depth of focus. The optical head includes a transparent substrate, an opaque film, and at least one sub-wavelength annular channel. After coherent light transmits the transparent substrate supporting the optical head and passes through the appropriately designed sub-wavelength annular channel, the transmitted light can overcome the diffraction limit, and the transmission energy is improved efficiently. The transmitted light converges after a certain distance behind the optical head and forms a sub-wavelength-scale beam that maintains a very long distance without divergence.
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patent: 2004/0131001 (2004-07-01), Nakada et al.
patent: 2006/0018211 (2006-01-01), Ueyanagi et al.
patent: 2006/0153045 (2006-07-01), Lee et al.
“1st Office Action of China counterpart application”, issued on Jun. 5, 2009, p. 1-p. 4.
Chang Chin-Kai
Chang You-Chia
Chen Chih-Hao
Cheng Tsung-Dar
Lee Chih-Kung
Haley Joseph
Industrial Technology Research Institute
Jianq Chyun IP Office
National Taiwan University
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