简单说，超广角近焦投影机--激光电视，为了贴近幕布，不得不使用价格昂贵的超广角透镜和反射镜，这不符合光学最佳设计。
Simply put, in order to get close to the screen, ultra wide angle close focus projector, laser TV, has to use expensive ultra wide angle lens and reflector, which is not in line with the best optical design.