Mirrorlamp brightness can be adjusted suit tor different light requirements.
镜灯亮度可调节，适合不同光线的使用要求。
2
The optical system uses the fluorescent lamp with the collimation mirror, incident the grating surface by the parallel light, in order to produce the moiréfringe through the grating.
光学系统采用白光灯加准直镜，以平行光照射光栅面，通过光栅副产生莫尔条纹。
3
Because it is a secrecy of the folk culture, and the mirror and lamp for exploring the regional culture.