Optical system for head-mounted display
AssigneeSekonix Co., Ltd.
InventorsSoon Chul Choi, Jung Hee Hwangbo
Life of this patent
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Abstract
An optical system for a head-mounted display in which image rays provided from a display device are divergent to form and provide an enlarged image is configured so that first and second lenses are sequentially disposed from an object along an optical axis and provide the enlarged image on an image plane, and angles of principal rays are gradually increased from the optical axis toward the edge of the image plane. Thus, as the angles of principal rays are increased, an angle of view is improved to provide a large screen so that it is possible to appreciate a vivid image due to an increase in the sense of presence and the degree of involvement. The entire size of the optical system can be reduced. The head-mounted display can be made compact and lightweight.
Claims13
An optical system for a head-mounted display, in which image rays provided from a display device are divergent to provide an enlarged image, wherein
- first and second lenses are sequentially disposed along an optical axis so as to allow angles of principal rays incident upon an image plane to be gradually increased from an optical axis toward an edge of the image plane,
- the first lens has positive refractive power, and the second lens has negative refractive power,
- |R1/R2|>2.5, and
- |f1/f2|<0.6,
- where R1 is a radius of curvature of a front surface of the first lens, R2 is a radius of curvature of a rear surface of the first lens, f1 is a focal length of the first lens, and f2 is a focal length of the second lens.
An optical system for a head-mounted display, in which image rays provided from a display device are divergent to provide an enlarged image, wherein
- first and second lenses are sequentially disposed along an optical axis so as to allow angles of principal rays incident upon an image plane to be gradually increased from an optical axis toward an edge of the image plane between 20% and 80% of a size of the image formed on the image plane,
- the first lens has positive refractive power, and the second lens has negative refractive power,
- |R1/R2|>2.5, and
- |f1/f2|<0.6,
- where R1 is a radius of curvature of a front surface of the first lens, R2 is a radius of curvature of a rear surface of the first lens, f1 is a focal length of the first lens, and f2 is a focal length of the second lens.
Dependencies are inferred from the claim text.