REFLEX REFLECTOR HAVING DOUBLE HOLOGRAM DIFFRACTION GRATING LAYERS

摘要

PURPOSE: A retroreflector having a double junction hologram grating layer is provided to transmit the incident light to the incident direction by using the principles of diffraction and total reflection. CONSTITUTION: A retroreflector having a double junction hologram grating layer includes a protective film layer(10), the first hologram grating layer(20), the second hologram grating layer(30), and a reflective layer(40). The incident light is diffracted by the first hologram grating layer(20). The light diffracted by the first hologram grating layer(20) is reflected by the reflective layer(40). The light reflected by the reflective layer(40) is transmitted to the first hologram grating layer(20) through the second hologram grating layer(30). The light is diffracted by the first hologram grating layer(20). The light diffracted by the first hologram grating layer(20) is transmitted to the outside through the protective film layer(10).