最近十几年来,光学仪器的制造有了重大的进步,光学玻璃表面反射光线的缺点得到很大的改善,我们只要稍微注意一下市场中出售的新照相机,新望远镜等光学仪器,就能够发现,它们的玻璃表面不再和往年一样洁净耀目,而是呈现蓝色或蓝红色的光彩。玻璃中有这种颜色并不是他内部或表面沾染了什么不干净的东西,而是玻璃表面多了一层薄膜。这层薄膜就象水上油迹或肥皂泡一样,光在膜中产生干涉而显出颜色。由于干涉,玻璃表面的反射光大量减少了。玻璃表面的反射给光学仪器造成了很大的损害。第一,射入仪器中的光线很大部分被反射而损失了;第二,光线在仪器中反复反射,降低了仪器的效能,造成了许多缺点。玻璃表面反射光线所造成的损害,在日常 In recent ten years, there has been a great improvement in the manufacture of optical instruments. The shortcomings of light reflection on optical glass surfaces have been greatly improved. With a little attention to optical instruments sold in the market such as new cameras and new telescopes, Their glass surfaces are no longer as bright and clean as they were in previous years, but appear blue or blue-red in color. The color of the glass is not what is not clean inside or surface contaminated with anything, but the glass surface more than a thin film. The film acts like a sudslot or soap bubble and light interferes with the film to reveal its color. Due to interference, the reflected light on the glass surface is greatly reduced. The reflection of the glass surface causes great damage to the optical instruments. First, most of the light entering the instrument is reflected and lost; second, the light is repeatedly reflected in the instrument, reducing the effectiveness of the instrument and creating many disadvantages. The glass surface reflects the damage caused by light in everyday life