Eyepiece optical system, and display device using the eyepiece optical system

A display system, comprising:

• a display device having a display portion on which an image is to be displayed,
• a relay optical system having an entrance pupil and adapted for projection of the image, and
• an eyepiece optical system, comprising:
• a substrate with a Fresnel surface formed thereon, wherein the Fresnel surface comprises rotationally symmetric concentric zones, and the substrate includes at least a curved area, wherein:
• the eyepiece optical system forms a final pupil that is an image of the entrance pupil at a given position, and the relay optical system and the eyepiece optical system are located such that an axial chief ray emerging from the relay optical system is obliquely incident on the eyepiece optical system, with the proviso that the axial chief ray is defined by a light ray emerging from a center of the display portion, and passing through the relay optical system and then through a center of an exit pupil of the relay optical system, wherein the display system further comprises:
• a supporting column,
• a first arm joined to the supporting column, and
• a second arm joined to the first arm, wherein:
• the display device and the relay optical system are held by the supporting column or the first arm at a position higher than the eyepiece optical system,
• the eyepiece optical system is held by the second arm, and
• the display device displays an image obtained from a surgical microscope or endoscope.

A display system, comprising:

• a display device having a display portion on which an image is to be displayed,
• a relay optical system having an entrance pupil and adapted for projection of the image, and
• an eyepiece optical system, comprising:
• a substrate with a Fresnel surface formed thereon, wherein the Fresnel surface comprises rotationally symmetric concentric zones, and the substrate includes at least a curved area, wherein:
• the eyepiece optical system forms a final pupil that is an image of the entrance pupil at a given position, and the relay optical system and the eyepiece optical system are located such that an axial chief ray emerging from the relay optical system is obliquely incident on the eyepiece optical system, with the proviso that the axial chief ray is defined by a light ray emerging from a center of the display portion, and passing through the relay optical system and then through a center of an exit pupil of the relay optical system, wherein the display system further comprises:
• a substrate of a system body, to which the display device, the relay optical system and the eyepiece optical system are attached, and wherein:
• the display device and the relay optical system are located in opposition to the eyepiece optical system,
• the eyepiece optical system is foldable and erectable with respect to said substrate, and
• the display device and the relay optical system are located at a position away from the eyepiece optical system while the eyepiece optical system is folded down.

A display system, comprising:

• a display device having a display portion on which an image is to be displayed,
• a relay optical system having an entrance pupil and adapted for projection of the image, and
• an eyepiece optical system, comprising:
• a substrate with a Fresnel surface formed thereon, wherein the Fresnel surface comprises rotationally symmetric concentric zones and the substrate is in a plane-parallel shape, and
• a holder member for holding the substrate, wherein the holder member has a recess in which the substrate is held,
• wherein:
• the eyepiece optical system forms a final pupil that is an image of the entrance pupil at a given position, and the relay optical system and the eyepiece optical system arc located such that an axial chief ray emerging from the relay optical system is obliquely incident on the eyepiece optical system, with the proviso that the axial chief ray is defined by a light ray emerging from a center of the display portion, and passing through the relay optical system and then through a center of an exit pupil of the relay optical system, wherein the display system satisfies condition (1):
• 0<|E/EPD|<2 (1)
• where EPD is a diameter of the exit pupil of the relay optical system, and E is an amount of aberration at a position of the final pupil.

A display system, comprising:

• a display device having a display portion on which an image is to be displayed,
• a relay optical system having an entrance pupil and adapted for projection of the image, and
• an eyepiece optical system, comprising:
• a substrate with a Fresnel surface formed thereon, wherein the Fresnel surface comprises rotationally symmetric concentric zones and the substrate is in a plane-parallel shape, and
• a holder member for holding the substrate, wherein the holder member has a recess in which the substrate is held;
• wherein:
• the eyepiece optical system forms a final pupil that is an image of the entrance pupil at a given position, and the relay optical system and the eyepiece optical system are located such that an axial chief ray emerging from the relay optical system is obliquely incident on the eyepiece optical system, with the proviso that the axial chief ray is defined by a light ray emerging from a center of the display portion, and passing through the relay optical system and then through a center of an exit pupil of the relay optical system, wherein said display system further comprises:
• a supporting column,
• a first arm joined to the supporting column, and
• a second arm joined to the first arm, wherein:
• the display device and the relay optical system are held by the supporting column or the first arm at a position higher than the eyepiece optical system,
• the eyepiece optical system is held by the second arm, and
• the display device displays an image obtained from a surgical microscope or endoscope.

A display system, comprising:

• a display device having a display portion on which an image is to be displayed,
• a relay optical system having an entrance pupil and adapted for projection of the image, and
• an eyepiece optical system, comprising:
• a substrate with a Fresnel surface formed thereon, wherein the Fresnel surface comprises rotationally symmetric concentric zones and the substrate is in a plane-parallel shape, and
• a holder member for holding the substrate, wherein the holder member has a recess in which the substrate is held, wherein:
• the eyepiece optical system forms a final pupil that is an image of the entrance pupil at a given position, and the relay optical system and the eyepiece optical system are located such that an axial chief ray emerging from the relay optical system is obliquely incident on the eyepiece optical system, with the proviso that the axial chief ray is defined by a light ray emerging from a center of the display portion, and passing through the relay optical system and then through a center of an exit pupil of the relay optical system, and further comprising:
• a substrate of a system body, to which the display device, the relay optical system and the eyepiece optical system are attached, and wherein:
• the display device and the relay optical system are located in opposition to the eyepiece optical system,
• the eyepiece optical system is foldable and erectable with respect to said substrate, and
• the display device and the relay optical system are located at a position away from the eyepiece optical system while the eyepiece optical system is folded down.