Study on a method of evaluating the alignment of pixels between fiber-optic image bundles and detector arrays

摘要

An evaluating method is proposed for aligning fiber-optic image bundles finely to detector arrays with coupled contrast transfer function (CTF). The mathematical expression of coupled CTF is deduced based on the definition of the CTF. The paper discusses the characteristics and variation law of coupled CTF at the Nyquist frequency domain. The results show that the value of coupled CTF is closely related with aligning accuracy. According to the value of coupled CTF, it can accurately determine the situation of aligning between fiber-optic image bundles and detector pixels. Accordingly, this paper proposes a new method to evaluate the aligning accuracy between fiber-optic image bundles and detector pixels using the coupled CTF.