The signal beam can be recreated by illuminating the medium with a beam identical to the original reference beam. 通过用和原始参考光相同的光束来照亮感光介质可以还原信号光。
This "signal beam" then meets a separate reference beam, and where the two beams intersect they create an interference pattern in a light-sensitive medium. 然后，信号光会和另一独立的参考光相遇，当两个光束相交时，它们会在感光介质中制造一个干涉图样。
