曝光后(曝光区域与非曝光区域)相对色差比较明显，易于检板。
It is distinctive to comparative color aberration after exposure (exposure area and non-exposure area), easy to check board.
一个平版印刷扫描设备包含一个用以无缝隙地，均匀地投射一扫描光到曝光区域上的光投装置。
A lithographic scanning apparatus includes a light projection device for seamlessly and uniformly projecting a scanning light onto a light exposing area.
成功实现这一过程的部分关键在于找到合适的光敏材料，其在最初曝光之后透明与不透明区域都应保持稳定。
Part of the trick was to find a suitable photochromic material whose clear and opaque parts would remain stable after the initial exposure to light.
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