Light weight head mounted image display device
First Claim
1. An image display apparatus comprising:
- an image display element; and
an observation optical system which forms an exit pupil for observation of an image displayed on said image display element, wherein said observation optical system has at least one surface that has a lens function, and the following condition is satisfied;
2 Assignments
0 Petitions
Accused Products
Abstract
An image display element 1 and an observation optical system 2 which forms an exit pupil 4 for observation of an image displayed on the image display element are included, wherein the observation optical system 2 has at least one surface 21 that has a lens function, and the following condition (1) is satisfied:
where P is a pixel pitch (in μm) of the image display element, PD is a diameter (in mm) of the exit pupil, and ZD is a distance (in mm) from the display surface of the image display element to the first surface having a lens function. Whereby, weight reduction is achieved while good image quality is maintained regarding an image display apparatus that is used for magnifying observation of an image on a display element.
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Citations
28 Claims
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1. An image display apparatus comprising:
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an image display element; and
an observation optical system which forms an exit pupil for observation of an image displayed on said image display element, wherein said observation optical system has at least one surface that has a lens function, and the following condition is satisfied;
- View Dependent Claims (2, 3, 4, 5)
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6. An image display apparatus comprising:
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an image display element; and
an observation optical system which forms an exit pupil for observation of an image displayed on said display element, wherein said observation optical system comprises at least one diffraction element that is given a lens function by diffraction effect and an optical member that satisfies the following condition;
- View Dependent Claims (7, 8)
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9. An image display apparatus comprising:
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an image display element; and
an observation optical system which forms an exit pupil for observation of an image displayed on said image display element, wherein said observation optical system comprises;
a first unit that comprises at least one prism member with a positive refracting power; and
a second unit, and said first unit is constructed to be movable for alignment of optical axes. - View Dependent Claims (10, 11, 12, 13, 14, 15)
wherein said at least one reflecting surface has a curved surface shape to exert a power on the bundles of rays, and the curved surface shape is configured as a rotationally asymmetric surface shape to compensate aberrations generated by decentering. -
12. An image display apparatus according to claim 9, wherein said second unit has a positive refracting power.
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13. An image display apparatus according to claim 9, wherein, for alignment of an optical axis of said image display element, an optical axis of said first unit and an optical axis of said second unit, said first unit is adjusted so that, upon a first pinhole being arranged on an exit surface side of said first unit and aligned with the optical axis of said first unit and a second pinhole being arranged on an exit surface side of said second unit and aligned with the optical axis of said second unit, and then upon a central portion of said image display element being made to flash as a point light source, said point light source is observable through said first pinhole and said second pinhole.
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14. An image display apparatus according to claim 9, wherein a photographing optical system is disposed on an exit pupil side so as to photograph an image displayed on said LCD.
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15. An image display apparatus according to claim 9, wherein said first unit is fixed with adhesive after alignment of the optical axes.
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16. An image display apparatus comprising:
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an image display element; and
an observation optical system which forms an exit pupil for observation of an image displayed on said image display element, wherein said observation optical system comprises;
a first unit that comprises at least one prism member with a positive refracting power; and
a second unit with a positive refracting power, a primary image surface is formed between said first unit and said second unit, and the following condition is satisfied;
- View Dependent Claims (17, 18, 19, 20)
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21. An image display apparatus comprising:
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an image display element; and
an observation optical system which forms an exit pupil for observation of an image displayed on said image display element, wherein said observation optical system has a positive refracting power, and the following condition is satisfied;
- View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification