Objective lens system of optical information recording/reproduci

Details Objective lens system of optical information recording/reproduci Objective lens system of optical information recording/reproduci

1991-10-04

1992-12-22

Arnold, Bruce Y.

Optical: systems and elements

Lens

Multiple component lenses

359708, G02B 1318, G02B 912

Patent

active

051738090

ABSTRACT:
An object lens system consists of a converging lens which has both surfaces formed of a convex aspherical surface and having a radius of curvature which is increased as it goes toward the periphery from the center thereof, and a chromatic aberration correcting element having almost no power disposed towards said light source side of said converging lens and adapted to correct a chromatic aberration of said converging lens.

REFERENCES:
patent: 3554629 (1971-01-01), Takahashi
patent: 4743093 (1988-05-01), Oinen
patent: 4753524 (1988-06-01), Sugiyama
patent: 4765723 (1988-08-01), Takamura
patent: 4909616 (1990-03-01), Arai
patent: 4953959 (1990-09-01), Ishiwata et al.

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