Optically variable image is abbreviated to OVI, illuminated by visible light and its color changes from different angles of view.

 
  • 光學(xué)可變圖像簡(jiǎn)稱(chēng)光變圖像,在可見(jiàn)光照射下,它的色彩隨著(zhù)觀(guān)察角度的不同而不斷變化。
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