Wernicke prism

An optical system was designed—the red light laser with circularity facular was used as the radiant lamp-house,the beam of light went across the diaphragm and Powell prism,formed a sector light-screen,then went across Fresnel lens,formed a parallel light,the distribution of which was symmetrical.

设计了一套光学系统——以红光点状光斑半导体激光器作为发光光源,光束通过光阑,再经过鲍威尔棱镜形成扇形光幕,然后经过菲涅尔透镜形成一道光强分布均匀的平行光幕。