数字投影系统使用非常强大的投影弧光灯，可以产生约3000 ANSI流明的光输出，并且工作温度势必变得非常高。石英灯达到1100摄氏度以上的温度，反光杯必须承受非常高的温度而不会受到任何损坏。
普通玻璃反光杯，如传统照明系统中使用的那些，并不合适。在开启和关闭时发生的350-400℃的温差，用玻璃反光杯会特别困难。这就是为什么用耐热硼硅酸盐玻璃制成的反光杯与功耗高达440瓦特的灯一起使用。
为了能够安全地控制更高水平的功率，傲尔为大功率灯提供特殊的玻璃陶瓷材料，可以承受高热负荷和热冲击。
反光杯运用有专利的PICVD镀膜。根据灯具的规格和应用，镀膜层系统开发及设计是与灯具制造商密切合作开发和生产的。
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