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发明授权
CN107615129B 内窥镜和用于该内窥镜的可变屈光度光学系统 有权

内窥镜和用于该内窥镜的可变屈光度光学系统
摘要：
一种用于内窥镜的可变屈光度光学系统，其包括：第一透镜组，其具有负屈光度；第二透镜组，其具有正屈光度；以及第三透镜组，并且其中，第一透镜组至少包括：负透镜，其具有朝向像侧的凹面表面；以及正弯月透镜，其具有朝向物侧的凹面表面，第二透镜组至少包括：弯月透镜，其具有朝向物侧的凸面表面；以及粘合透镜，其通过将负透镜和正透镜粘合在一起而形成，而第三透镜组至少包括具有朝向物侧的凸面表面的正透镜，并且其中，用于内窥镜的可变屈光度光学系统配置为满足预定条件。
摘要（英）：

A variable power optical system for an endoscope comprising a first lens group having a negative power, a second lens group having a positive power and a third lens group, and wherein the first lens group includes at least a negative lens having a concave surface pointing to an image side and a positive meniscus lens having a concave surface pointing to an object side, the second lens group includes at least a meniscus lens having a convex surface pointing to the object side and a cemented lens formed by cementing together a negative lens and a positive lens, and the third lens group includes at least a positive lens having a convex surface pointing to the object side, and wherein the variable power optical system for an endoscope is configured to satisfy a predetermined condition.

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