The tilt aberration will greatly reduce the quality of astronomical observation. The traditional tilt measurement method mainly uses the four quadrant detection method. The accuracy of this method is greatly affected by the signal-to-noise ratio. When the light is weak, the measurement effect is not ideal. In this paper, a method based on optical block method is proposed to measure the tilt angle by using the linear relationship between the change rate of receiver light intensity and the tilt angle. Compared with the traditional tilt measurement method, the calculation is less and the tilt angle can be measured more quickly. Because proposed method only needs a detector on the focal plane to take the tilt measurement in a single direction, and there is no requirement for the spot size, so this method has high utilization of light energy and can realize weak light tilt detection.

倾斜像差会大大降低天文观测的质量。传统的倾斜测量方法主要采用四象限检测方法。这种方法的精度受信噪比的影响很大。光线较弱时，测量效果不理想。本文提出了一种基于光块法的方法，利用接收器光强变化率与倾角的线性关系来测量倾角。与传统的倾斜测量方法相比，计算量更少，可以更快地测量倾斜角度。由于所提出的方法只需要在焦平面上有一个探测器就可以进行单方向的倾斜测量，对光斑大小没有要求，