Optical lens, condenser lens, optical pickup, and optical...

Details Optical lens, condenser lens, optical pickup, and optical... Optical lens, condenser lens, optical pickup, and optical...

2006-11-28

2006-11-28

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Single channel simultaneously to or from plural channels

C359S719000, C369S112230

Reexamination Certificate

active

07142365

ABSTRACT:
The present invention provides an optical lens having a high refractive index and a low light absorption characteristic in an ultraviolet-wavelength region; a condenser lens composed of the optical lens, fit for the near-field optical recording/reproducing system; an optical pickup that includes the condenser lens and can reduce the condensed light spot irradiating a recording medium and also manage to make the recording medium higher in recording density and greater in capacity; and an optical recording/reproducing apparatus comprising the optical pickup to enable optical recording and reproduction in high recording density to be performed.

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