Material Characteristics: Optical quality glass, quartz glass, lead and cadmium free multi component silicate glass, or borosilicate glass or Plastics.

• 材料特性:光学质量级别的玻璃,石英玻璃,含有铅和镉的多元素硅酸盐玻璃或者硼硅酸盐玻璃。