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Optically is the adverb — it tells you how something is done, or in what way it is true, when light, images, or seeing are involved. If two materials are optically the same, they look the same to the eye, even if they are made differently. If a film is stored optically, it is saved as tiny marks that light (usually a laser) can read, not as a magnetic pattern. The idea is the same family as optical; this form just fits a different slot in the sentence. Use it to modify a verb or an adjective (optically stored, optically clear), not as if it were an adjective itself.
在光學上；以光學方式
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
opticallyadv
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regarding or using optics
- The picture is seen optically through the lens, as in many photo cameras.
- The microscopically small crystals often obtained by very rapid cooling of the hot solution, appeared to be no crystals of the optically active form either; they were rhombic individuals exhibiting prismatic, domatic and basal facets, of a new hydrate of the racemic compound, probably at higher temperatures stable, and containing less water of crystallization.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。