一种新的自动调焦方法——离轴探测法

Off-axis detect on approach-a new autofocusing method

本文提出了的种新的自动调焦方法——离轴探测法,此法没用任何附加元件,结构简单、装调容易、线性度好、灵敏度高、调焦范围大、实用性强;介绍了此法的原理、理论计算结果及实验结果;给出了应用实例.

A new antofoeusing method called off-axis detection (OAD) method is deoeloped. It used no ether elements except a off-axis arranged quadrant detector . It has the advantages of simplicity, good reliablity, high sensitivity, better linearity and can be used in many fields, especially, in optical disk. The principle of the OAD method is described and the results of computer simulation and experiment are given.