photon attenuation 中文意思是什麼

photon attenuation 解釋
光子衰減
  • photon : n. 1. 【物理學】光子。2. 【醫學】見光度〈網膜照明單位〉。
  • attenuation : n. 1. 變薄，變細。2. 減少，減弱。3. 稀釋。4. 【物理學】衰減。
  1. Optical attenuation, widely applied in many fields, can be adopted to acquire single - photon sequence that is foundational in quantum key distribution. we obtain single - photon sequence by precisely controlled optical power distribution along outlets of manifold consist of beam splitter instead of the attenuation by time sequence due to loss

    用線性分束耦合器形成多個輸出口，將光強的時序衰減變為光強沿輸出口的空間分佈，研製出了量子保密通信用的精密控制的強衰減器，實現了對光子數的精密控制。
  2. Ideal single photon sources are far beyond real application. in practice, single photon sources being used are gained from precisely controlled heavy attenuation. to analyse the security of quantum key distribution system based on practical single photon sources is being very important

    單光子是量子保密通信的一大技術關鍵，也是安全的基礎，但是理想的單光子源離實際的使用還很遠，目前實際使用的單光子源是由精密控制的強衰減技術得到的。
  3. The object of single photon emission computed tomography ( spect ) is to reconstruct an unknown radioactivity distribution inside the body from projection data consisting of the number of photon collected on a collimated gamma camera. these projections are not simple line integrals but have point - spreads due to the imperfect collimator of the detector and attenuation due to the compton scattering. so

    這種投影數據與透射ct中的數據不同，由於存在著光子的點擴散（由準直器引起）和衰減（由散射引起） ，已經不能用簡單的線積分來描述這個問題，因此相對于透射ct而言，這個領域將面臨很多困難。
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