| 摘要 |
The reflectivity of a reflex reflector device comprising a reflex reflector element having corner cube reflecting elements on a rear surface thereof is improved, particularly at high entrance angles, by the provision of a second reflex reflector element behind the first reflex reflector element. The second reflex reflector element has corner cube reflecting elements which are on a rear surface thereof and which have a linear size five to ten times smaller than that of the corner cube reflecting elements of the first reflex reflector. Further improvements can be obtained if the corner cube reflecting elements of the second reflex reflector are angled relative to the front surface of the first reflex reflector. |
