Microscope

A microscope comprising:

• an objective lens having an optical axis;
• 1st, 2nd, 3rd and 4th magnification-varying optical systems of a same power, having optical axes parallel to the optical axis of said objective lens and positioned behind said objective lens and around the optical axis of said objective lens;
• a deflection optical system to direct two light beams, transmitted by any two among said 1st, 2nd, 3rd and 4th magnification-varying optical systems, to a first direction and also to direct two light beams, transmitted by any two among said 1st, 2nd, 3rd and 4th magnification-varying optical systems, to a second direction or a third direction;
• a first imaging optical system to respectively form images by the two light beams directed to said first direction;
• and
• a second imaging optical system provided rotatably about the optical axis of said objective lens with respect to said first imaging optical system and adapted to respectively form images by the two light beams directed to said second direction or said third direction, said deflection optical system, when the optical axes of said first and second imaging optical systems form an angle of about 90.degree., directing two light beams transmitted by said 1st and 2nd magnification-varying optical systems to said first direction and also directing two light beams transmitted by said 3rd and 4th magnification-varying optical systems to said second direction;
• and
• said deflection optical system, when the optical axes of said first and second imaging optical systems form an angle of about 180.degree., directing two light beams transmitted by said 1st and 2nd magnification-varying optical systems respectively to said first and third directions.

A microscope comprising:

• an objective lens having an optical axis;
• 1st, 2nd, 3rd and 4th magnification-varying optical systems of a same power, having optical axes parallel to the optical axis of said objective lens and positioned behind said objective lens and around the optical axis thereof,
• a deflection optical system to direct two light beams transmitted by any two among said 1st, 2nd, 3rd and 4th magnification-varying optical systems, to a first direction and also to direct two light beams transmitted by any two among said 1st, 2nd, 3rd and 4th magnification-varying optical systems, to a second direction or a this direction;
• a first imaging optical system to respectively form images using the two light beams directed to said first direction;
• a second imaging optical system provided rotatably about the optical axis of said objective lens with respect to said first imaging optical system and adapted to respectively form images by the two light beams directed to said second direction or said third direction;
• a first observation optical system to observe the two light beams from said first imaging optical system;
• and
• a second observation optical system to observe the two light beams from said second imaging optical system,
• said deflection optical system, when an angle formed by an optical axis of said first imaging optical system with an optical axis of said second imaging optical system is about 90.degree., directing two light beams transmitted by said 1st and 2nd magnification-varying optical systems, to said first direction and also directing two light beams transmitted by said 1st and 3rd magnification-varying optical systems, to said second direction,
• said deflection optical system, when an angle formed by the optical axis of said first imaging optical system with the optical axis of said second imaging optical system is about 180.degree., directing two light beams transmitted by said 1st and 2nd magnification-varying optical systems, to said first direction and also directing two light beams transmitted by said 3rd and 4th magnification-varying optical systems, to said third direction.

A microscope comprising:

• an objective lens having an optical axis;
• at least four magnification-varying optical systems, having optical axes parallel to the optical axis of said objective lens;
• a deflection optical system to direct two beams transmitted by a specified two among said at least four magnification-varying optical systems, in a first direction and also to direct two beams, among three beams transmitted by three of the at least four magnification-varying optical systems excluding at least one of said specified two magnification-varying optical systems, in a second direction;
• a first imaging optical system to form images using the two light beams directed in the first direction;
• a second imaging optical system provided rotatably about the optical axis of said objective lens with respect to said first imaging optical system and adapted to respectively form images by the two light beams directed in the second direction;
• a first observation optical system to observe the two beams from said first imaging optical system;
• and
• a second observation optical system to observe the two beams from said second imaging optical system.

A microscope comprising:

• an objective lens having an optical axis;
• a plurality of magnification-varying optical systems positioned behind said objective lens and providing at least first, second, third and fourth beams;
• a first imaging optical system to form images using the first and second beams from said plurality of magnification-varying optical systems;
• a second imaging optical system rotatable with respect to said first imaging optical system and adapted to form images based on the third and fourth beams or based on the second and third beams from said magnification-varying optical systems, depending upon an angle of said second imaging optical system with respect to said first imaging optical system.