凸透镜中心部分比周围要厚，它使光线会聚。
A convex lens is thicker at its center than its periphery. It causes rays to converge.
透镜中心：这指定的是透镜畸变中心，单位为像素。
Lens centre: This specifies the centre of lens distortion, measured in pixels.
该仪器可用于磨边或胶合定中心和检验透镜中心误差。
This instrument can be used for centering during edging and cement, and testing centering error of lenses.
讨论超高精度要求的球面曲率半径、透镜中心厚度、球面面形与透镜偏心差等各项指标的综合控制技术与检测方法。
The overall control and test technology for spherical radius of curvature, central thickness, surface accuracy anddecentring error of lenses have been discussed.
讨论超高精度要求的球面曲率半径、透镜中心厚度、球面面形与透镜偏心差等各项指标的综合控制技术与检测方法。
The overall control and test technology for spherical radius of curvature, central thickness, surface accuracy anddecentring error of lenses have been discussed.
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