Optical information recording and reproducing apparatus

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

1988-05-17

1989-03-14

Corbin, John K.

G02B 300

Patent

active

048120200

ABSTRACT:
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 ##EQU1## wherein .lambda. is a wavelength of the laser beam emitted by said laser light source, and .omega..sub.0 is a diameter of a laser beam spot focused by said optical system.

REFERENCES:
patent: 4253735 (1981-03-01), Kawamura et al.
patent: 4564268 (1986-01-01), Tatsuno et al.

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