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- Product Description
| Product Size | Length: 150.00cm | Width: 50.00cm | Height: 100.00cm | Product Weight | 12.500kg |
| Packing Size | Length: 50.00cm | Width: 150.00cm | Height: 100.00cm | Packing Weight | 12.500kg |
HUD抬头显示挡风玻璃
抬头显示HUD（Head Up Display）已不再是战斗机的专利，HUD也一度作为豪华车型的高科技配置，而今HUD已经逐渐走向平民化。如下面是奔驰、宝马、奥迪的HUD，大量彩色数字信息投射到挡风玻璃上。
1、HUD优点
（1）HUD信息显示位置比传统的组合仪表位置高。也就是说，驾驶员想查看车辆信息时，通过HUD只需低下头5-10°；而看组合仪表的话，则需低20-25°。
（2）驾驶员从组合仪表上查看驾驶信息时，眼睛从道路转移到组合仪表再转移到道路，由于道路亮度高而组合仪表（车内）的亮度低，眼睛就会经历由亮到暗再到亮的过程，眼睛瞳孔会进行调整；同时眼睛的聚集点会由远到近再到远。而驾驶员从HUD上看信息时，眼睛就不需要这么折腾了。
2；挡风玻璃
挡风玻璃有啥特殊的？上面左图是普通挡风玻璃夹层结构示意，如果把HUD图像投射到普通挡风玻璃上，很容易形成图像重影，投射效果差。
而HUD挡风玻璃夹层内部的PVB膜呈楔形，即玻璃呈上厚下薄的状态，这样就不会形成图像重影。
从这里也可以看到，为了降低玻璃成本，在大多A、B级车上搭配的HUD系统的，会另外配备一块反射玻璃。而在大多豪华品牌上，成本限制没那么紧张，就会用HUD挡风玻璃。
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