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OBSERVATION OPTICAL SYSTEM UNIT, IMAGING UNIT, AND ENDOSCOPE
专利权人:
发明人:
申请号:
EP16841181.7
公开号:
EP3225149A1
申请日:
2016.04.12
申请国别(地区):
EP
年份:
2017
代理人:
摘要:
An observation optical system unit includes a first lens 58a which is positioned closest to an object side, among rear-group lenses 58, and which is configured by a stepped lens including a proximal portion 58b, an outer circumference of which is held by a rear-group lens frame 57, and a protruding portion 58c formed to have an outer circumference smaller than the outer circumference of the proximal portion 58b and protruding into a region At where a moving lens frame 65 is allowed to advance and retract, where the moving lens frame 65 overlaps with the protruding portion 58c at a retracted position.
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