beam spread

基本解釋

Incandescent reflector test lamps shall be of the widest beam spread available. A Type MR test lamp shall have a dichroic reflector.
帶反光杯的白熾燈測試用燈泡應(yīng)當有最寬的擴展光束，MR型測試燈應(yīng)當有分色反射燈。
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The coupling among laser modes and the relations between equivalent beam spread angle and the surface deformation of the mirrors are obtained.
給出了激光模式之間的耦合以及等效光束發(fā)散角與鏡面變形量之間的關(guān)系。
Light sent into the oil layer was confined there, bouncing between the metal and air boundaries. The beam spread out ever more quickly, generating a trumpet-shaped glow (see image).
當把光傳入油層后，就被約束在那里，光線在金屬和空氣的邊界之間不斷反彈，于是產(chǎn)生了喇叭狀的輝光（見圖片）。