轴向梯度折射率TFCCD监视镜头设计

Design of Axial Gradient Index TFCCD Monitor Lenses

设计了焦距26mm,F2.8的适用于1024×1024pixels,像元15μm×15μm面型硅TFC-CD的工厂车间监视镜头。分别设计了传统的全球面镜头和包含两片轴向梯度折射率材料镜头,轴向梯度折射率监视镜头比原普通全球面镜头减少了两片透镜。经过像质评价,后者像质有所提高。RMS从12.67μm减小到8.86μm;最大视场35 lp/mm处最小MTF从0.18提高到0.43;畸变从-5.21%减小到0.76%。

Two monitor TFCCD lenses are designed with loci 50mm and F2.8 used for factory with 1024 × 1024pixels and image element 15μm × 15μm. One is traditionally overall spherical lens, the other is a lens including two axial gradient index medium. The lenses are compared and found that the latter gets rid of two singlets but image quality im- proving a lot. RMS decrease from 12. 67μm to 8. 86μm,minimum MTF at 35lp/mm increase from 0.18 to 0.43 and distortion at maximum field decrease from- 5.21% to 0.76%.