A high-precision confocal auto-collimation decentration measurement method (CADM) for spherical lens is proposed. In comparison with the traditional auto-collimation method, this method employs confocal technology to accurately locate the center of the tested lens, which reduces the focusing error. The radius of curvature and center bias measurements are integrated into one measurement system, which eliminates the random errors introduced by multiple installations. This enables the measurement of every surface in the lens group without iterative operations, reducing the errors introduced by the iterative operation of multiple measured values. Theoretical analysis and experiments show that the measurement accuracy of this method reaches 0.335 arcsec. CADM effectively improves measurement efficiency and accuracy, providing a reliable and effective method for the decentration measurement of optical systems.

中文翻译：

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球面透镜激光共焦自准直偏心测量

提出了一种高精度球面透镜共焦自准直偏心测量方法(CADM)。与传统的自准直方法相比，该方法采用共焦技术准确定位被测镜头的中心，减少了聚焦误差。曲率半径和中心偏差测量集成到一个测量系统中，从而消除了多个安装引入的随机误差。这使得镜头组中的每个表面的测量无需迭代操作，减少了多个测量值的迭代操作引入的误差。理论分析和实验表明，该方法的测量精度达到了0.335弧秒。CADM有效提高测量效率和精度，