Visual display apparatus comprising a decentered correcting optical system

A visual display apparatus comprising:

• an image display device for forming an image for observation,
• a relay optical system for relaying a real image from said image display device,
• an ocular concave reflecting optical system for projecting the real image relayed by said relay optical system as an enlarged image and for reflectively bending rays emitted from said image display device, and
• a decentered correcting optical system disposed between said relay optical system and said ocular concave reflecting optical system and having one lens which is provided so that a surface thereof which faces said relay optical system and a surface thereof which faces said ocular concave reflecting optical system are both decentered with respect to an optical axis formed by said relay optical system wherein a surface of said decentered correcting optical system that is the closest to said ocular concave reflecting optical system is convex toward said ocular concave reflecting optical system.

A visual display apparatus comprising:

• an image display device for forming an image for observation,
• a relay optical system for relaying a real image from said image display device,
• an ocular concave reflecting optical system for projecting the real image relayed by said relay optical system as an enlarged image and for reflectively bending rays emitted from said image display device, and
• a decentered correcting optical system disposed between said relay optical system and said ocular concave reflecting optical system and having one lens which is provided so that a surface thereof which faces said relay optical system and a surface thereof which faces said ocular concave reflecting optical system are both decentered with respect to an optical axis formed by said relay optical system, and that an optical axis of said surface on the relay optical system side and an optical axis of said surface on the ocular concave reflecting optical system side intersect each other wherein a surface of said decentered correcting optical system that is the closest to said ocular concave reflecting optical system is convex toward said ocular concave reflecting optical system.

A visual display apparatus comprising:

• an image display device for forming an image for observation,
• a relay optical system for relaying a real image from said image display device,
• an ocular concave reflecting optical system for projecting the real image relayed by said relay optical system as an enlarged image and for reflectively bending rays emitted from said image display device, and
• a decentered correcting optical system disposed between said relay optical system and said ocular concave reflecting optical system and having a lens which is not rotationally symmetric with respect to an optical axis formed by said relay optical system wherein a surface of said decentered correcting optical system that is the closest to said ocular concave reflecting optical system is convex toward said ocular concave reflecting optical system.

A visual display apparatus comprising:

• an image display device for forming an image for observation,
• a relay optical system for relaying a real image from said image display device,
• an ocular concave reflecting optical system for projecting the real image relayed by said relay optical system as an enlarged image and for reflectively bending rays emitted from said image display device,
• a decentered correcting optical system disposed between said relay optical system and said ocular concave reflecting optical system and having a lens surface decentered with respect to an optical axis formed by said relay optical system,
• wherein said decentered correcting optical system includes an anamorphic surface, and
• wherein said anamorphic surface is formed so that refractive power in a plane containing respective optical axes of said image display device, relay optical system and ocular concave reflecting optical system is larger than refractive power in a plane perpendicular to said plane.

A visual display apparatus comprising:

• an image display device for forming an image for observation,
• a relay optical system for relaying a real image from said image display device,
• an ocular concave reflecting optical system for projecting the real image relayed by said relay optical system as an enlarged image and for reflectively bending rays emitted from said image display device,
• a decentered correcting optical system disposed between said relay optical system and said ocular concave reflecting optical system and having one lens which is provided so that a surface thereof which faces said relay optical system and a surface thereof which faces said ocular concave reflecting optical system are both decentered with respect to an optical axis formed by said relay optical system,
• wherein said decentered correcting optical system includes an anamorphic surface, and
• wherein said anamorphic surface is formed so that refractive power in a plane containing respective optical axes of said image display device, relay optical system and ocular concave reflecting optical system is larger than refractive power in a plane perpendicular to said plane.

A visual display apparatus comprising:

• an image display device for forming an image for observation,
• a relay optical system for relaying a real image from said image display device,
• an ocular concave reflecting optical system for projecting the real image relayed by said relay optical system as an enlarged image and for reflectively bending rays emitted from said image display device,
• a decentered correcting optical system disposed between said relay optical system and said ocular concave reflecting optical system and having one lens which is provided so that a surface thereof which faces said relay optical system and a surface thereof which faces said ocular concave reflecting optical system are both decentered with respect to an optical axis formed by said relay optical system, and that an optical axis of said surface on the relay optical system side and an optical axis of said surface on the ocular concave reflecting optical system side intersect each other,
• wherein said decentered correcting optical system includes an anamorphic surface, and
• wherein said anamorphic surface is formed so that refractive power in a plane containing respective optical axes of said image display device, relay optical system and ocular concave reflecting optical system is larger than refractive power in a plane perpendicular to said plane.

A visual display apparatus comprising:

• an image display device for forming an image for observation,
• a relay optical system for relaying a real image from said image display device,
• an ocular concave reflecting optical system for projecting the real image relayed by said relay optical system as an enlarged image and for reflectively bending rays emitted from said image display device,
• a decentered correcting optical system disposed between said relay optical system and said ocular concave reflecting optical system and having a lens which is not rotationally symmetric with respect to an optical axis formed by said relay optical system,
• wherein said decentered correcting optical system includes an anamorphic surface, and
• wherein said anamorphic surface is formed so that refractive power in a plane containing respective optical axes of said image display device, relay optical system and ocular concave reflecting optical system is larger than refractive power in a plane perpendicular to said plane.