| 摘要 |
This invention relates to a cost-saving method for intimidatingly expelling harmful wild birds (A) and beasts by multiple laser beams irradiation wherein said beams hit them on their eyes with the retinas thereof subjected to the excessively intense luminance of the laser beam, the after-effects of which are ever-lasting on the part of those animals. Namely, the present invention adopts such means as convergently irradiating a set of laser beams (Ln) with regard to a space where their invasion is to be hindered so as to form a laser beams net (Ln) in said space, so that any one of those beams is sure to directly hit the invading animals (A) on their eyes with the retinas thereof subjected to the excessively intense luminance of the laser beam. According to this method, there is almost no case where they get used to a trap as in the prior arts, and providing that a laser beams net is left active for some time, they acquire the error of such intense luminance that they come to avoid entering into said space, even if the laser beams irradiation is stopped for quite a long time. |
