针对裂隙灯转鼓的光学装校, 提出一种数字化装校方法。该方法采用透射式装校系统原理, 在检测光路前后加入十字线, 通过观察2个十字线在CCD图像中的成像来判断装校质量, 最后通过图像处理得到数字化信息。通过提取2个十字线的中点坐标, 判断转鼓光学系统的光轴是否一致; 通过提取CCD图像的清晰度大小, 判断转鼓光学系统是否对焦。利用该方法对转鼓进行装校, 结果表明: 该方法是一种利用图像处理技术将装校位置信息转化为数字信息的数字化方法, 通过数字图像分析装校误差在0.1 mm以内。

In view of optical alignment of slit-lamp rotating drum, a new digital optical calibration method was presented. This method adopts the principle of transmission aligning system, adds the cross lines before and after the detecting optical path, judges the aligning quality by observing the imaging of two cross lines in the charge-coupled device (CCD) image and achieves the digital information through image processing at last. By extracting the midpoint coordinates of two cross lines, it can be judged whether the optical axis of the rotating drum optical system is consistent; by extracting the clarity of CCD image,it can be judged whether the rotating drum optical system is focusing . This method was used to align the rotating drum. The results show that the proposed method is a digital method to transform aligning information to digital information by using image processing technology, and its alignment error is less than 0.1 mm by digital image analysis.