宽谱段折射式长焦光学镜头

介绍了宽谱段、折射式长焦镜头的光学设计.重点讨论了宽谱段(420～900 nm)二级光谱的校正问题,修正了部分色散（P）和阿贝数（V）的计算公式,使之适合于宽谱段光学系统的设计,并给出了设计实例及设计结果.本系统理论上的二级光谱约为1.2 mm,而设计结果使三条谱线（420 nm、600 nm、900 nm）基本交于一点,实际二级光谱约0.23 mm.

Wide Bands Long Focal Refracting Lens

The imaging parts of CCD were widely taken by modern optical system, however, its ability of responding to the wide bands optical spectrum is more excellent than human being′s eyes, so the optical system using CCD must be specially designed. A wide bands long focal refracting lens′s design were introduced, the problem of the inherent secondary spectrum in a wide bands and long focal refracting optical system were discussed, the formulas which used to calculate P and V were modified, and made it adapt to wide bands system′s design, the processofthedesignwereshowedasanexample.Inthetheory,itsremainssecondaryspectruminthissystem is 1.2 mm (in the lne 535 nm),the design made three lines (420 nm; 600 nm; 900 nm) across together at one point, its remains actually equal to 0.23 mm (in the line 484 nm). The result of this design is well enough to meet the whole system′s need, so it is possibly to think that the modification of the formulas P and V in this design could meet the wide bands system′s practice.