This device is installed between the cover lens of a signal lamp main body and the light source in order to prevent pseudo lighting phenomenon. This device (B) comprises a pair of plates of spherical lens matrices (200) each plate being formed by the following way: a large number of spheres are arranged on a plane in matrix, and so pressed and deformed that they are brought into contact with each other without gaps between them but with the spherical tops intact, these spherical tops serving as spherical lens elements. The device (B) further comprises a light shielding member (300) disposed between the plates as a spacer, having light transmitting slits which respectively receive lens planes of the spherical lens elements from the corresponding side, and determining the corresponding foci of the spherical lens elements of one of the plates in the vicinities of the vertexes of the lens planes of the spherical lens elements of the other plate. The solar rays which enter through the cover lens are once focused in the light transmitting slits by means of the composite spherical lens elements of the plate on the cover lens side, and then, diffused by the composite spherical lens elements of the plate on the light source side to reach the signal lamp body. The reflected rays which are reflected in the signal lamp and tend to exit are thus reduced. At the same time, the reflected rays are blocked by the light shielding member. Therefore, the contrast between the inside and outside of the signal lamp becomes remarkably clear. IMAGE
展开▼
