An ocular optical system adapted for an imaging ray of a display image being entered an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a first lens and a second lens arranged in order from an eye-side to a display-side along an optical axis. Each of the first lens and the second lens has an eye-side surface and a display-side surface. A maximum distance between the display-side surface of the first lens and the eye-side surface of the second lens parallel to a direction of the optical axis is less than 5 millimeters, and the ocular optical system satisfies: 6DLD/EPD20. DLD is a diagonal length of the displayed image corresponding to a single pupil of the observer, and EPD represents an exit pupil diameter of the ocular optical system.

An ocular optical system adapted for an imaging ray of a display image being entered an observer's eye through the ocular optical system to form an image is provided. The ocular optical system includes a first lens and a second lens arranged in order from an eye-side to a display-side along an optical axis. Each of the first lens and the second lens has an eye-side surface and a display-side surface. A maximum distance between the display-side surface of the first lens and the eye-side surface of the second lens parallel to a direction of the optical axis is less than 5 millimeters, and the ocular optical system satisfies: 6DLD/EPD20. DLD is a diagonal length of the displayed image corresponding to a single pupil of the observer, and EPD represents an exit pupil diameter of the ocular optical system.

An ocular optical system includes a first lens element and a second lens element from an eye-side to a display-side in order along an optical axis. The first lens element and the second lens element each include an eye-side surface and a display-side surface. The eye-side surface of the first lens element has a convex portion in a vicinity of the optical axis. The second lens element has negative refracting power. The ocular optical system satisfies 1.5|f2/f1| and 250 millimeters/EFL10, wherein f2 is the focal length of the second lens element, fl is the focal length of the first lens element, and EFL is the effective focal length of the ocular optical system.

An ocular optical system includes a first lens element and a second lens element from an eye-side to a display-side in order along an optical axis. The first lens element and the second lens element each include an eye-side surface and a display-side surface. The eye-side surface of the first lens element has a convex portion in a vicinity of the optical axis. The second lens element has negative refracting power. The ocular optical system satisfies 1.5|f2/f1| and 250 millimeters/EFL10, wherein f2 is the focal length of the second lens element, fl is the focal length of the first lens element, and EFL is the effective focal length of the ocular optical system.

The present invention relates to adjustable focus loupe eyeglasses comprising: side frames on both sides thereof; a front frame with a glasses frame structure; and a loupe mounting unit for mounting a loupe, the loupe mounting unit being installed so as to be slidable right and left along the front frame, wherein the front frame is configured such that a portion between both ends thereof in the longitudinal direction of the plane surface forms a circular arc shape around a preset front focal point, and has a guide hole which is formed vertically through the upper portion thereof and has a length along the circular arc shape, and wherein the loupe mounting unit comprises: a locking part which is fixed to or is slidable along the guide hole; and a rim which is arranged on the bottom of the locking part and on which a loupe is mounted, wherein the loupe mounted on the rim is configured such that a focal spot magnified by the loupe mounting unit being guided along the guide hole faces toward the center of the circular arc of the guide hole.

The present invention relates to adjustable focus loupe eyeglasses comprising: side frames on both sides thereof; a front frame with a glasses frame structure; and a loupe mounting unit for mounting a loupe, the loupe mounting unit being installed so as to be slidable right and left along the front frame, wherein the front frame is configured such that a portion between both ends thereof in the longitudinal direction of the plane surface forms a circular arc shape around a preset front focal point, and has a guide hole which is formed vertically through the upper portion thereof and has a length along the circular arc shape, and wherein the loupe mounting unit comprises: a locking part which is fixed to or is slidable along the guide hole; and a rim which is arranged on the bottom of the locking part and on which a loupe is mounted, wherein the loupe mounted on the rim is configured such that a focal spot magnified by the loupe mounting unit being guided along the guide hole faces toward the center of the circular arc of the guide hole.

An optical magnifying combination lens, a head-mounted optical display system and a virtual reality display device are provided, wherein the optical magnifying combination lens is for utilization in a head-mounted virtual reality display device, comprising: a central area (A) and a peripheral area (B), wherein the central area (A) is a convex lens or a combination convex lens, and the peripheral area (B) is a focusing thin optical element; the central area (A) corresponds to main visual field imaging, and the peripheral area (B) corresponds to peripheral visual field imaging. The optical magnifying combination lens guarantees center image quality and enlarges edge view of human eyes, so as to enhance user immersion feelings.

An optical magnifying combination lens, head-mounted display optical system and virtual reality display device. The optical magnifying combination lens (2) is used in a head-mounted virtual reality display device and includes a main lens (21) and a secondary lens (22), the main lens (21) including a central area (A) and an peripheral area (B), wherein the central area (A) comprises a convex lens or a combined convex lens, and the peripheral area (B) is a focusing thin optical element. The secondary lens (22) is a focusing thin optical element formed with a hollowed-out region. The main lens (21) and the secondary lens (22) are stacked together, and the hollowed-out region of the secondary lens (22) closely fits with a convex portion of the central area (A) of the main lens (21). The display device using the optical magnifying combination lens (2) ensures central image quality, and expands a peripheral field of view of a human eye, thus increasing user immersion.