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本文介绍用于广播(或工业)电视摄象变焦距镜头的一个重要附件——焦距范围扩展镜,它用来扩展镜头的焦距范围。叙述了扩展镜的性能特点、设计方法和象质分析。最后给出一个设计实例。
This article describes an important attachment for broadcast (or industrial) TV camera zoom lenses - the focal length range expansion lens that is used to extend the focal length of the lens. Describes the expansion mirror performance characteristics, design methods and image quality analysis. Finally, a design example is given.