PRERECORDED VIDEOCASSETTES LASER DISCS

Brand	Owner	Address	Description
ART ATTACK	McNeilly, Michael	1320 Summit Drive Beverly Hills CA 90210	prerecorded videocassettes and laser discs featuring motion pictures and television programs; CD-ROMs featuring motion pictures and television programs, music, and games; computer game programs, and video game cartridges and game tape cassettes; musical sound recordings; and sunglasses;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

An optical system for an optical head of an optical disc drive is capable of using first and second discs, protective layer of the second disc being thicker than that of the first disc, a data density of the second disc being lower than that of the first disc. A light source selectively emits first and second laser beams having first and second wavelengths, respectively. An objective lens converges the first and second beams on the first and second discs, respectively. The second beam is incident on the objective lens as diverging light, and the first beam is incident on the objective lens as a beam of which degree of divergence is smaller. A diffraction lens structure is formed in the high NA exclusive area, which compensates for aberrations of a portion of the first laser beam, and causes aberrations to a portion of the second laser beam passed therethrough.