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提出一种获取平面光学元件光圈数的方法。通过确定一幅干涉条纹图像中三块测试区域及相应的搜索区域,寻找条纹弯曲量的平均值和相应条纹间距的平均值,根据测试区域对应的权重系数,得到被测平面光学元件光圈数的最佳估计值。通过测量标准光圈并比较目视判读结果,得到最大相对误差为5%。实验结果表明,该方法提高了处理干涉条纹图像的适应性,并可替代人工目视判读干涉条纹图像。
A method to obtain the aperture of planar optical components is proposed. By determining the three test areas and corresponding search areas in an interference fringe image, finding the average value of the amount of fringe bending and the average value of the corresponding fringe spacing, and obtaining the number of fringes of the measured planar optical element according to the weight coefficient corresponding to the test area Best estimate By measuring the standard aperture and comparing the visual interpretation, the maximum relative error is 5%. Experimental results show that this method can improve the adaptability of processing fringe images and can substitute artificial visual interpretation of fringe images.