PURPOSE: To make possible the recognition of an object in a dark place where there are less rays by disposing plural pieces of transparent parts, one piece of which is a circle sized at 0.7W2.0mm diameter or regular polygon tangential to the circle, into the zigzag position of the regular triangle having 3.0W5.5mm length on one side and forming the other part as an opaque part.

CONSTITUTION: Each transparent body 2 is made into a specified shape and plural pieces of such transparent parts are disposed into the opaque part 3 in the specified disposing positional relation. The shape and disposing position of the transparent parts 2 are made in the following manner: A piece of the transparent part 2 is made into the circle sized at 0.7W2.0mm diameter or the regular polygon inscribing or circumscribing the circle. Plural pieces of such transparent parts 2 are disposed in the zigzag position of the regular triangular shape having 3.0W5.5mm distance between the centers of the transparent part 2 and the transparent part 2 shown by l. The strong ray quantity is shielded by the opaque part 3 in the visual field and since the visual field is continuous, there are no obstacles to hinder the visual sensation and the exact viewing of the object even in the strong rays is made possible.