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一、透镜偏心差的概念与规定透镜偏心差的意义什么是透镜偏心差(俗称中心偏)?国外有些教科书和标准规定为透镜几何轴与光轴互相平行错开的一段距离,我国国家标准 GB1224—76对透镜偏心差说明为。透镜的外圆中心轴和光轴的偏离程度,近来又有将球心偏当成偏心差或者将两者混为一谈,概念上的含糊,造成设计和制造检验上的不统一,所以应该弄清楚什么是透镜偏心差。对光学系统(这里指两个透镜以上)来说,各折射面的球心不在一条直线上时要影响成象质量。对单块透镜来说,两个球心联线就是光轴,在一般并不知道透镜的定位轴条件下,无所谓球心偏。但应予给单块透镜的偏心差要求,这是为了满足后继工序(磨边后的胶合,
First, the concept of lens eccentricity and the difference between the definition of lens eccentricity What is the difference between the lens eccentricity (commonly known as central deviation)? Some foreign textbooks and standards for the geometric axis of the lens and the optical axis parallel to each other staggered some distance, China’s national standard GB1224- 76 pairs of lens eccentricity is described as. Recently, the deviation of the central axis of the lens from the optical axis has recently been offset by eccentricity of the center of the sphere or a combination of the two. The conceptual ambiguity has caused inconsistencies in design and manufacturing tests. Therefore, it should be clarified what is a lens Eccentric difference. In the case of an optical system (here more than two lenses), the center of the refracts does not lie on a straight line and affects the quality of the image. For a single lens, the two ball center line is the optical axis, in general do not know the lens positioning axis conditions, it does not matter spherical center. But should be given to the eccentric lens requirements of a single lens, which is to meet the successor process (edging after edging,