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日本JEOL公司与西德西门子公司合作。开发出一种JEM=2000SCM超高分辨率发射式电子显微镜,并计划将其引入显微镜领域。这种新式电子显微镜被指望能看到DNA的双螺旋结构和其它的酶,以及有助于更好地分析大分子。该仪器利用了一只超导电子透镜。此透镜能产生一个6或7特斯拉的强磁场。超导透镜激磁电流的绝对稳定,使它能获得高的分辨率。电子透镜充满液氦,并与试样一起被冷却到-269℃。试样密封在一只三重结构低温箱中,并保持高真空。结果,由电子束生成的热所造成的试样
Japan JEOL company and West Germany Siemens cooperation. A JEM = 2000SCM ultrahigh resolution transmission electron microscope was developed and is planned to be introduced into the field of microscopy. This new electron microscope is expected to see the double helix structure of DNA and other enzymes, as well as to help better analyze macromolecules. The instrument utilizes a superconducting electron lens. This lens produces a strong magnetic field of 6 or 7 Tesla. Superconducting lens excitation current absolute stability, it can get high resolution. The electron lens was filled with liquid helium and cooled to -269 ° C with the sample. The sample is sealed in a triple-structured cryostat and kept under high vacuum. As a result, the sample caused by the heat generated by the electron beam