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Retroreflective film is widely used in traffic signs. Compared with glass beaded retroreflective film, cube corner retroreflective film has higher efficiency, and it is also treated as diamond grade retroreflective materials. But for cube corner retroreflective film, the range of incident angle is very limited and there is strong anisotropic in the retroreflection coefficient. With the use of cant, the above problems may be solved or eased. In recent years, a method of computer aided design is started to use in the retroreflective film design to save development time and cost. But there is not a way told before to calculate the retroreflectance when the symmetry axis of cube corner element is canted. Committed to solve this problem, we carried out the research work based on the geometric shape in the laminae combination techniques. In this paper, a new simulator is introduced. In our simulator, the percent active area is calculated through the analytic geometry, and the primary light loss in the transmission process is calculated based on the basic theory of optics. The simulation results are also described in detail.

Reflection spot patterns changes has been analysed both theoreticallly and numerically based on matrix optics and combinatorics when there is some parallel deviation between the two concave mirorrs of a Herriott multipass cell. The results show that, with a fixed inlet spot location of the incident light, the reflection spots can still distribute in a same circle by adjust the incidence angle even for non-parallel mirorrs of a Herriott multipass cell. With increasing parallel deviation between the two reflection mororrs, the circle radius increases, and center of the circular path is no longer located at the center of the reflection mirorr, it is farther and farther from the center of the reflection mirorr. These characteristics help us determine whether there is parallel deviation between the two concave reflection mirorrs and to judge its relative magnitude. It can be served as a guide for optical path adjustment in Herriott multipass experiment.