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BuKePrinting >> knowledge >> 包裝廠家平面透射全息圖

包裝廠家平面透射全息圖

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2021-02-27 | 465 Views | Share:
​垂直平行激光照明H時，有三個光波（原始物光波、共軛物光波和直射光波）到達H的乳膠面，共形成三套乾涉圖形。

           包裝廠家平面透射全息圖


是振幅型平面透射全息圖H復制光路。復制時，設原始全息圖H1和全息乾版H的間距為L。

垂直平行激光照明H時，有三個光波（原始物光波、共軛物光波和直射光波）到達H的乳膠面，共形成三套乾涉圖形。

其中由原始物光波和共軛物光波形成的乾涉圖形因振幅型平面全息圖的衍射效率很低可以忽略不計。

因此，復制全息圖且共記錄了兩組千涉圖形，這和原始全息圖只記錄一組乾圖形有區別復制全息圖H再現時，

可同時觀察到兩個虛像和兩個實像，且它們之間的距離均為2L，如平面透射全息圖的復制和再現若復制時L=0，

則復制後得到的全息圖再現時只有一個虛像和一個實像對於位相型的平面透射全息圖，當被平面光波照射時，

全息圖的附近光波和強度沒有調制，只有在光波從錶面傳播一段適當遠的距離後才能乾涉，並發生強度調制。

由於理想的接觸復制（L=0）需要強度變化，因此它不能用於位相型平面全息圖的復制。

包裝廠家平面透射全息圖
包裝廠家平面透射全息圖

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