| 摘要 |
Lamp assembly consisting of a housing with an opening containing a bulb, a frenel lens, a condenser lens and an outer lens installed in the housing nearest to the opening which allow the beams from the condenser lens to pass through plurality of portions pervious to light corresponding to the condenser lens respectively of which surfaces have the different tilt angles with each other, through which the refracted beams are radiated in such a manner that their refracted directions have in turn a gradual tendency of tilting. |
