Stereoendoscope wherein images having passed through plural incident pupils are transmitted by common relay optical systems

An endoscope comprising:

• an objective optical system, said objective optical system having plural visual field directions and plural pupils corresponding to these visual field directions and formed so as not to be superimposed on each other and forming object images, and
• a transmitting optical system having a single optical axis and transmitting the object images and plural pupils from said objective optical system simultaneously;
• wherein said objective optical system further comprises a front side optical system which receives beams in directions different from each other and projects said beams as plural substantially afocal beams arranged substantially in parallel along the optical axis of said transmitting optical system and a rear side optical system which has a single optical axis common with said transmitting optical system, converges the plural beams from said front side optical system and forms object images rearward, and
• wherein said image transmitting optical system transmits rearward the object images and plural pupils, and is formed to be of a size equal to or larger than the size of the plural pupils corresponding to the plural beams transmitted from said rear side optical system.

An endoscope comprising

• an objective optical system having plural visual field directions and plural pupils corresponding to said plural visual field directions;
• and
• a transmitting optical system having a single optical axis,
• wherein said objective optical system comprises a front side optical system including plural pupils receiving respectively plural beams in directions different from each other and a prism optical system varying at least one of said beams and converting the respective beams to beams directed in substantially the same direction and a rear side optical system forming object images made of plural beams from said front side optical system in substantially the same position, and
• wherein said transmitting optical system transmits rearward the object images and plural pupils from said rear side optical system simultaneously.

An endoscope comprising:

• an objective optical system;
• and
• a transmitting optical system,
• wherein said transmitting optical system has a single optical axis,
• wherein said objective optical system further comprises a front side optical system including a lens having a negative refractive power and a rear side optical system including a lens having a positive refractive power. and has a convergence,
• wherein said front side optical system includes plural lenses having optical axes in directions different from each other and a prism receiving beams in directions different from each other and converting said beams to plural beams arranged substantially in parallel with the single optical axis of said transmitting optical system, and
• wherein said rear side optical system has a size including the beams projected out of said front side optical system, and has a single optical axis. and forms images of objects of said plural beams simultaneously through said transmitting optical system on an image surface.