F-THETA LENS AND LASER APPARATUS INCLUDING THE F-THETA LENS

    公开(公告)号:US20190129188A1

    公开(公告)日:2019-05-02

    申请号:US16178372

    申请日:2018-11-01

    Abstract: The laser apparatus includes a laser generator configured to generate at least one input beam traveling from one side to the other side in one direction and an optical system including an F-theta lens, which includes a plurality of spherical lenses. The F-theta lens includes a first lens including a first one surface that is convex toward the one side and a first other surface that is convex toward the other side, a second lens including a second one surface that is convex toward the one side and a second other surface that is concave toward the other side, a third lens including a third one surface that is concave toward the one side and a third other surface that is convex toward the other side, and a fourth lens including a fourth one surface that is convex toward the one side and a fourth other surface that is a plane perpendicular to the other side

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