Abstract: A rear view mirror with retroreflective function is disclosed. The rear view mirror comprises a first smooth surface which is coated with at least one layer of film. The at least one layer of film may reflect, at least partially, some visible light with a wavelength within a predetermined range and let, at least partially, some other visible light with a wavelength within a predetermined range pass through; a second surface opposing to the first smooth surface and having a plurality of prisms thereon; and an impermeable cover provided on the second surface. Accordingly, the rear view mirror can still perform the original rear viewing function by reflecting appropriate amount of the visible lights. Furthermore, the rear view mirror also provides the warning function of a retroflective plate by letting some of the visible lights pass through the first smooth surface and reach the second surface which can retroreflect the light rays along their original incoming path.

Abstract: This invention primarily relates to a method for making a retroreflective plate including the steps of: (a) making a plurality of pin units by injection molding wherein the pin units substantially include a relatively thicker portion and a relatively thinner portion which is connected to the relatively thicker portion from the bottom thereof along the longitudinal direction of the pin units, the free end of the relatively thicker portion away from the relatively thinner portion forms a tapered portion; (b) placing the pin units on a base, wherein the base has a top surface and a plurality of recessions thereon such that the relatively thinner portion of the pin units can be put into at least some of the recessions for positioning; (c) producing a master negative die with the construction thereof complementary to the tapered portion of the arranged pin units; and (d) using the master negative die to form a retroreflective plate with the construction thereof complementary to that of the master negative die.