Near-field objective lens for an optical head

Details Near-field objective lens for an optical head Near-field objective lens for an optical head

2005-01-18

2005-01-18

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Microscope objective

C359S664000, C369S013330

Reexamination Certificate

active

06844983

ABSTRACT:
A near-field optical head objective lens that can read and write high-density data on an optical disc is disclosed. On a surface where an incident beam converges by the near-field optical head objective lens, a film that can produce surface plasmon effect is coated. As the incident beam hits the material and produces the surface plasmon, a micro aperture is generated to minimize the diameter of the light spot, thereby increasing the data capacity stored in the optical disc.

REFERENCES:
patent: 20030173501 (2003-09-01), Thio et al.

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