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数据存储行业的发展促成了一批术语的问世,这是些只用一组字母来表示的术语。与其他技术行业相似,随着时间的推移,字母后面的意义常常会变得模糊起来。下文介绍了一些磁光(MO)存储器件中“字母后面”的含义。数值孔径 光学透镜的数值孔径(NA)越大则表示其成像越清晰越明亮,而对于MO驱动器的激光元件而言,越大的数值孔径表示入射光束的直径或盘面上的光点直径越小。典型磁光产品(符合ISO标准)的透镜NA值是0.55,随着激光器、透镜及光纤技术的不断发展,数值孔径大小有可能提高至1.0,这已是固体透镜的折射极限了。
The development of the data storage industry has led to the advent of a number of terms, which are terms expressed in a single set of letters. Like other technology industries, the meaning behind letters often becomes blurred over time. The following paragraphs describe the meaning of “behind the letters” in some magneto-optical (MO) memory devices. The larger numerical aperture (NA) of a numerical aperture optical lens means that the sharper and brighter its imaging, the larger the numerical aperture for MO driver laser elements, the smaller the diameter of the incident beam or the spot diameter on the disk surface . The lens NA value of a typical magneto-optical product (ISO compliant) is 0.55. With the continuous development of lasers, lenses and fiber optics, it is possible to increase the numerical aperture to 1.0, which is already the refractive limit of solid lenses.