朝阳区镜头对焦测试卡
镜头对焦测试卡简介
镜头对焦测试卡YE0110用于测试镜头的整体对焦,调整镜头,检查镜头各区后焦及分辨率。测试卡由9个扇形星组成,在图像各个区域均匀分布。扇形星的中间白色部分是外径的10%。在扇形星内有两个圆形线条,内层图形是一个625线的结构,较大圆线是312线结构。
The test chart consists of 9 sector stars, distributed equally over the picture area. The unresolved center of the sector star is 10% of its outer diameter. Within the sector stars are two circular lines. The inner one marks a 625 line structure, the larger circular line marks a structure of 312 lines.
The test chart is designed for
- adjustment of camera lenses
- checking back focal distance
- checking resolution over the picture area
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