| 摘要 |
PURPOSE: A reflex reflector having a double junction hologram diffraction grating layer is provided which does not need a metallic pattern technology by performing a role of a recursive reflection effectively using the diffraction grating by a pure holographic method. CONSTITUTION: The reflex reflector includes a protection film layer(10), and the first hologram diffraction grating layer(20) which is formed below the protection film and includes the first hologram diffraction grating, and the second hologram diffraction grating layer(30) including the second hologram diffraction grating bonded below the first hologram diffraction grating layer, and a reflection layer(40) formed below the second hologram diffraction grating layer. A light projected from the external through the protection film layer is diffracted on the first hologram diffraction grating layer and is projected on the second hologram diffraction grating layer, and then is totally reflected from the reflection layer. Then, the light is projected on the first hologram diffraction grating layer through the second hologram diffraction grating layer again and is diffracted on the first hologram diffraction grating layer and then is reflexively reflected to the external through the protection film layer.
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