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透射凸二次非球面具有自消球差的能力。只要像距、物距、材料的折射率及二次曲面系数之间满足一定的条件 ,则物点与像点就具有消球差的成像关系。研究了二次非球面系数e2 值与成像放大率 β 的关系 ,目的在于为透射凸二次非球面的检验找到普遍适用的范围。实例计算和实际的应用表明 ,对于中小口径的凸非球面来说 ,透射补偿法是比较实用的检验方法 ,特别是此种方法可以检验一些凸的扁球面。
Transmission convex secondary aspheric ability to eliminate the ball. As long as the distance, object distance, the refractive index of the material and the coefficients of the quadric satisfy certain conditions, then the object point and the image point have a cancellous imaging relationship. The relationship between the value of the secondary aspheric coefficient e2 and the imaging magnification β was studied in order to find a universally applicable range for the test of transmission convex aspheric aspheric surface. The calculation and practical application of the examples show that the transmission compensation method is a practical test method for medium and small caliber convex aspheric surfaces. In particular, this method can test some convex flat spherical surfaces.