Optical information recording and reproducing apparatus

Details Optical information recording and reproducing apparatus Optical information recording and reproducing apparatus

G - Physics

11

B

352/32.2

G11B 7/12 (2006.01) G11B 7/09 (2006.01)

Patent

CA 1303738

ABSTRACT OF THE DISCLOSURE An optical information recording and reproducing apparatus comprises: a laser light source having a Gaussian intensity distribution of an emitted laser beam; an optical system for focusing the laser beam emitted from said laser light source, having a number of aperture NA represented by Image where .lambda. is a wavelength of the laser beam emitted by said laser light source, and .omega.0 is a diameter of a laser beam spot focused by said optical system.

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