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guo wai dian di
Author(s): 
Pages: 29
Year: Issue:  2
Journal: Optical Technique

Keyword:  正透镜负透镜变焦物镜孔径全息元件焦距变焦镜头反射镜半导体激光器摄远镜头;
Abstract: <正> 变焦镜头由两组摄远变焦镜头给出了六种变焦物镜,这两组摄远变焦镜头的孔径分别为f/2.8和f/4。这些物镜均由Vivitar公司生产。它们中不管那一种,前组镜头是一个分离的双负透镜,后组镜头是一个复合的正透镜,可改变
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