The circular symmetric point and the apalanatic point of spherical lens have one same expression, however the two kinds conjugate point are belong to difference category.

With the precision degree of its lifting platform as a focal point, the paper also introduces the related mechanical models and the rigidity design of the lifting platform using conjugate beam method.

At last, the precise point correspondences on the correspondence curves between the different images are implemented by using the conjugate gradient based on the initial matching.