Qualified Subchapter S (Q-SST) A special trust utilized to hold "S" corporation stock without jeopardizing "S" corporation tax benefits. Qualified Terminal Interst Property (Q-TIP) Commonly referred to as the "C" trust; it has many uses (e.g., excesses above the first to die grantor’s...
这些平凸透镜使用符合RoHS标准的BK7(N-BK7)生产,且镀有350-700 nm波长范围的增透膜。当不需要紫外熔融石英的额外优点(一直到UV波段都具有高透过率且热膨胀系数更低)时,一般都会选择N-BK7玻璃。它们的焦距为正,对于无限远和有限远共轭比应用,性能接近最佳外形透镜。平凸