Compact optical device for augmented reality having straightly-arranged optical structure, and method for manufacturing optical means

A compact optical device for augmented reality having a straightly-arranged optical structure, the compact optical device comprising:

• an optical means configured to transmit at least part of real object image light therethrough toward a pupil of a user's eye;
• a first reflective means embedded and disposed inside the optical means, and configured to transfer augmented reality image light, which is image light corresponding to an image for augmented reality output from an image output unit, to a second reflective means;
• and
• the second reflective means including a plurality of reflective units embedded and disposed in the optical means to transfer the augmented reality image light, transferred from the first reflective means, to the pupil of the user's eye by reflecting the augmented reality image light toward the pupil;
• wherein the optical means has a first surface on which real object image light is incident, and a second surface through which the augmented reality image light transferred through the second reflective means and the real object image light are output toward the pupil of the user's eye;
• wherein the second reflective means includes a plurality of reflective units having a size of 4 mm or less that are embedded and disposed inside the optical means;
• wherein, when the optical means is placed in front of the user's pupil and a forward direction from the pupil is set as an x axis, the image output unit is disposed outside or inside the optical means to be located on a straight line orthogonal to the x axis;
• and
• wherein, when any one of line segments passing between the first and second surfaces of the optical means while being parallel to a vertical line extending from the image output unit to the x axis along the x axis is set as a y axis and a line segment orthogonal to the x axis and the y axis is set as a z axis:
• the plurality of reflective units are arranged inside the optical means such that centers thereof are positioned on one single straight line when the optical means is viewed from an outside toward a plane perpendicular to the z-axis.

A compact optical device for augmented reality having a straightly-arranged optical structure, the compact optical device comprising:

• an optical means configured to transmit at least part of real object image light therethrough toward a pupil of a user's eye;
• a first reflective means embedded and disposed inside the optical means, and configured to transfer augmented reality image light, which is image light corresponding to an image for augmented reality output from an image output unit, to an optical element;
• and
• the optical element embedded and disposed in the optical means to transfer the augmented reality image light, transferred from the first reflective means, to the pupil of the user's eye by reflecting the augmented reality image light toward the pupil;
• wherein the optical means has a first surface on which real object image light is incident, and a second surface through which the augmented reality image light transferred through the optical element and the real object image light are output toward the pupil of the user's eye;
• wherein the optical element is a diffractive optical element or a holographic optical element;
• wherein, when the optical means is placed in front of the user's pupil and a forward direction from the pupil is set as an x axis, the image output unit is disposed outside or inside the optical means to be located on a straight line orthogonal to the x axis;
• and
• wherein, when any one of line segments passing between the first and second surfaces of the optical means while being parallel to a vertical line extending from the image output unit to the x axis along the x axis is set as a y axis and a line segment orthogonal to the x axis and the y axis is set as a z axis:
• the optical element is formed in a single plane shape, and is disposed inside the optical means so that it appears as a single straight line form when the optical means is viewed toward a plane perpendicular to the z axis.