Optical: systems and elements – Having significant infrared or ultraviolet property – Lens – lens system or component
Patent
1996-05-15
1998-12-22
Henry, Jon
Optical: systems and elements
Having significant infrared or ultraviolet property
Lens, lens system or component
359350, 359708, 359793, 359719, G02B 1314, G02B 302, G02B 1318, G02B 904
Patent
active
058525084
ABSTRACT:
A lens device for focusing a beam of an ultraviolet-ray region, provided with at least one aspherical lens made of synthetic quartz in which an aspherical portion is formed by a coating a fluororesin on a spherical portion of a side polished to a spherical surface; an ultraviolet-ray emitting device provided with a laser beam source emitting a beam in the ultraviolet-ray region and an object lens which has at least one of the above aspherical lenses; and an optical disc recording device provided with a laser beam source emitting a beam in the ultraviolet-ray region, a light intensity modulating means for modulating the intensity of the laser beam emitted from the laser beam source in accordance with a data signal; and the above object lens.
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patent: 4891663 (1990-01-01), Hirose
patent: 4986641 (1991-01-01), Braat
patent: 5419968 (1995-05-01), Okada et al.
patent: 5615199 (1997-03-01), Tatsuno et al.
patent: 5631779 (1997-05-01), Kashima
patent: 5657168 (1997-08-01), Maruyama et al.
Eguchi Naoya
Kubota Shigeo
Chang Audrey
Henry Jon
Kananen Ronald P.
Sony Corporation
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