STEREOSCOPIC ENDOSCOPE OPTICAL SYSTEM AND ENDOSCOPE PROVIDED THEREWITH

WIPO Patent Application WO/2018/189853

A1

The purpose of the present invention is to provide a stereoscopic endoscope optical system having high resolving power although being compact, and an endoscope provided therewith. This stereoscopic endoscope optical system is provided with a first optical system and a second optical system, wherein each of the optical systems comprises an objective optical system, a relay optical system, and an image formation optical system, the image formation optical system comprises a first lens group, a first optical path change element, and a second optical path change element, the objective optical system and the relay optical system are disposed in a first optical path, a second optical path is formed between the first optical path change element and the second optical path change element, a third optical path is formed between the second optical path change element and a final image, the first optical path change element has a first reflection surface disposed in the first optical path, and a second reflection surface disposed in the second optical path, the second optical path change element has a third reflection surface disposed in the second optical path, and a fourth reflection surface disposed in the third optical path, and the following conditional expressions (1), (2) are satisfied. (1): D1