A laser scanner is disclosed. The laser scanner comprises a laser source, a first optical element, and a focusing element. The first optical element is adapted to move along the optical axis of light from the laser source. The focusing element receives laser light from the first optical element and is adapted to move orthogonally to the optical axis. Optionally, the focusing element may include multiple focusing lenses. A first focusing lens may be adapted to move along a first axis which is orthogonal to the optical axis. A second focusing lens may be adapted to move along a second axis which is orthogonal to the optical axis and to the first axis. The laser scanner may also include a second optical element which receives light from the focusing element and is adapted to effectively increase the focal length of the focusing element without increasing its f number.本發明揭示一種雷射掃描器。該雷射掃描器包含:一雷射源、一第一光學元件及一聚焦元件。該第一光學元件經調適以沿著來自雷射源之光的光軸移動。該聚焦元件自該第一光學元件接收雷射光且經調適以與該光軸正交移動。視需要,該聚焦元件可包括多個聚焦透鏡。一第一聚焦透鏡可經調適以沿著一與該光軸正交之第一軸移動。一第二聚焦透鏡可經調適以沿著一與該光軸且與該第一軸正交之第二軸移動。該雷射掃描器可亦包括一第二光學元件,該第二光學元件自該聚焦元件接收光且經調適以在不增加聚焦元件之f數值(光圈數)的情況下有效地增加其焦距。11‧‧‧雷射掃描器13‧‧‧雷射源15‧‧‧光學器件17‧‧‧眼睛19‧‧‧視域21‧‧‧掃描透鏡23‧‧‧準直透鏡25‧‧‧聚焦透鏡27‧‧‧聚焦透鏡29‧‧‧鏡面31‧‧‧折射材料塊33‧‧‧扁平透鏡35‧‧‧焦點37‧‧‧鏡面39‧‧‧放大透鏡41‧‧‧放大透鏡
