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生产实践证明,存在中心偏差的透镜在装配后,如果各球面的中心不落在光轴上,那么该系统的共轴性就被破坏,这时,光学系统就产生了附加象差,从而引起成象质量的恶化。因此,在设计过程中,对各种透镜的中心偏差提出了不同的要求。例如,显微物镜、强光力物镜、广角物镜、复制照象物镜和望远镜(包括内调焦的望远镜)的第一组的表面等,对中心偏很敏感,所以这些表面的中心偏差要求较高,一般约为:0.003～0.010毫米,这可用自准直方法或装配时,由透镜镜框的结构来保证。而望远物镜的精度要求为0.02～0.03毫米这是一般加工方法所能达到的精度。一般目镜的中心偏差要求在0.03～0.05毫米之间,放
Production practice has proved that the center of deviation of the lens assembly, if the center of the spherical surface does not fall on the optical axis, then the coaxial system is destroyed, then the optical system to produce additional aberrations, resulting in Deterioration of image quality. Therefore, in the design process, the center of the various lens deviations put forward different requirements. For example, the first set of surfaces of microscope objectives, intense objectives, wide-angle objectives, replicating objectives, and telescopes (including internally focused telescopes) are very center-sensitive so the center deviations of these surfaces require less High, generally about: 0.003 ~ 0.010 mm, which can be self-collimation method or assembly, the structure of the lens frame to ensure. The telescope objective accuracy requirements of 0.02 to 0.03 mm This is the general processing methods can achieve the accuracy. General eyepiece center deviation requirements between 0.03 ~ 0.05 mm, put