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BuKePrinting >> knowledge >> 光的乾涉原理【步殼印刷​】

光的乾涉原理【步殼印刷​】

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2023-02-02 | 43 Views | Share:
光的乾涉原理【步殼印刷​】

光的乾涉原理【步殼印刷】


光的乾涉原理是指兩束頻率相同、在相遇點有相同振動方向和固定位相差的光波相乾交疊在一起時，因各點的光強度與各光波單獨存在時的光強度之和不一致，而在它們交疊的區域出現光強度重新分佈的現象，即有些地方光強度接近於零，而另一些地方光強度則較兩束光波單獨存在時的光強度之和大很多。簡單來講，光的乾涉是指滿足一定條件的兩列相乾光波相遇疊加，在疊加區域某些點的光振動始終加強，某些點的光振動始終減弱，即在乾涉區域內振動強度有穩定的空間分佈

1.獲得穩定乾涉的必要條件

獲得穩定乾涉的必要條件是：兩束光的頻率相同：兩束光的振動方向相同：在疊加處防改印刷與包裝兩束光的振動有恆定的位相差

2.獲得相乾光的基本原理

獲得相乾光的基本原理是：把一個光源的一點發出的光束設法分為兩束，然後再使它們相遇。激光是一種相乾性很好的光源，它可以產生相乾光波，因此全息照相多採用激光作為光源

 

 

光的乾涉原理【步殼印刷】

光的乾涉原理【步殼印刷】

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