变焦距物镜组对整个系统的光学信息传递有着重要的作用。
Zoom lens plays an important role in the optical information capture of the whole optical system.
该技术的缺点是：必须保证油不会从物镜组的小室中泄漏出去。
The downside of this technology was insuring that the oil would not leak out of the lens cell.
介绍了二级光谱的基本原理，给出了波差法设计复消色差物镜的方程组。
The principle of secondary spectrum is introduced and the equations of designing apochromatism objective lens based on wave aberration are presented.
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