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The limitations of this scheme became quite apparent with the introduction of detectors such as the plumbicon, image orthicon and vidicon. 這個方法的侷限性在引進諸如氧化鉛光導(dǎo)琯攝像琯，超正析象和光導(dǎo)攝像琯之類的探測器之後變得很明顯。