Objective lens

Details Objective lens Objective lens

G - Physics

02

B

G02B 17/00 (2006.01) G02B 1/10 (2006.01) G02B 3/00 (2006.01) G02B 3/02 (2006.01) G02B 7/02 (2006.01) G11B 7/135 (2006.01)

Patent

CA 2362902

In an objective lens (1) shared by various kinds of optical disks using different wavelengths, damage due to collision between the disk and lens is avoided. A protective member (1b) is provided in the entire periphery or in a part of the periphery of a protective protrusion (1p) of the objective lens (1). The protective member (1b) may replace the protective protrusion (1p).

L'invention concerne une lentille d'objectif (1) partagée par différents types de disques optiques utilisant différentes longueurs d'ondes, dans laquelle sont évités les dégâts causés par des collisions entre le disque et la lentille. Un élément protecteur (1b) est placé sur toute la périphérie ou sur une partie de la périphérie d'une protubérance protectrice (1p) de la lentille d'objectif (1). L'élément protecteur (1b) peut remplacer la protubérance protectrice (1p).

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