To satisfy the requirements of precision angle measurement and machine leveling, a high-sensitivity dual-axis optoelectronic level using double-layer liquid refraction is proposed in this paper. Silicone oil, with a constant horizontal surface, is used as a reference. A double-layer liquid refraction principle is used to improve the level's sensitivity. An autocollimator is used as a detector of two-dimensional angle. Parallel-light paths are adopted to avoid interference from reflected light. When the level has a tilt angle, the light spot on the quadrant photodiode of the autocollimator is bound to shift. The sensitivity model of the level was established, and the level was designed and tested. Experimental results revealed that the level has a resolution of 0.05 arcsec, a range of ± 150 arcsec, a repeatability of 0.4 arcsec, and a stability of ± 0.2 arcsec. It can be used to measure tilt with a high-precision requirement.

为了满足精密测角和机器调平的要求，本文提出了一种利用双层液体折射的高灵敏度双轴光电水平仪。具有恒定水平表面的硅油用作参考。采用双层液体折射原理，提高水平灵敏度。自准直仪用作二维角度检测器。采用平行光路，避免反射光干扰。当水平仪有倾斜角时，自准直仪象限光电二极管上的光斑必然会发生偏移。建立了水平灵敏度模型，设计并测试了水平。实验结果表明，该级别的分辨率为0.05角秒，量程为±150角秒，重复精度为0.4角秒，和± 0.2 弧秒的稳定性。可用于测量精度要求较高的倾斜。