| 摘要 |
PURPOSE:To cast light forward effectively by coupling the front end opening of a reflex mirror with a convex lens through a cylindrical lamp body, forming the inner surface so as to function as a light reflecting face, and providing an aid reflex plate overhanging as tapered to the periphery of the front end opening. CONSTITUTION:Light beams from a light source 14 at No.1 focal point f1 reflected by a reflex mirror 12 is converged at No.2 focal point f2 situated ahead and led therefrom toward a convex lens 16. When passing through this convex lens 16, the light will become parallel beams to be cast ahead. Those beams of light emitted from the light source which are reflected toward positions set off from the focal point f2 are introduced to the front end opening of a lamp body 13 while repeating reflections at its light reflecting face, and are cast into the convex lens 16. Because a ring-shaped aid reflex plate 18 overhanging ahead as tapered is provided on the radial direction outside of the convex lens 16, the reflected light refracted outward in radial direction when passing thorugh the convex lens 16 is reflected by the aid reflex plate 18 and led forward. |
