Image projection system, image projection apparatus, image display light diffraction optical element, tool, and image projection method

An image projection apparatus comprising:

• a positional information acquisition unit configured to acquire three-dimensional positional information of an image display light diffraction optical element provided in front of each of two eyes, wherein the three-dimensional positional information includes a distance from the image projection apparatus to the image display light diffraction optical elements;
• an image display light adjustment unit configured to adjust projected image display light on a basis of the three-dimensional positional information acquired by the positional information acquisition unit;
• and
• one projection optical system that can project the image display light to a region covering the two eyes and configured to project, toward the image display light diffraction optical elements, the image display light adjusted by the image display light adjustment unit.

An image display light diffraction optical element used to make image display light reach each of two eyes, in which the image display light is projected from an image projection apparatus that includes:

• a positional information acquisition unit configured to acquire three-dimensional positional information of the image display light diffraction optical element provided in front of each of the two eyes, wherein the three-dimensional positional information includes a distance from the image projection apparatus to the image display light diffraction optical elements;
• an image display light adjustment unit configured to adjust projected image display light on a basis of the three-dimensional positional information acquired by the positional information acquisition unit;
• and
• one projection optical system that can project the image display light to a region covering the two eyes and configured to project, toward the image display light diffraction optical elements, the image display light adjusted by the image display light adjustment unit,
• wherein the image display light diffraction optical elements are separated from the image projection apparatus and arranged in front of the two eyes, respectively.

A tool comprising an image display light diffraction optical element used to diffract image display light and make the image display light reach each of two eyes, in which the image display light is projected from an image projection apparatus that includes:

• a positional information acquisition unit configured to acquire three-dimensional positional information of the image display light diffraction optical element provided in front of each of the two eyes, wherein the three-dimensional positional information includes a distance from the image projection apparatus to the image display light diffraction optical elements;
• an image display light adjustment unit configured to adjust projected image display light on a basis of the three-dimensional positional information acquired by the positional information acquisition unit;
• and
• one projection optical system that can project the image display light to a region covering the two eyes and configured to project, toward the image display light diffraction optical elements, the image display light adjusted by the image display light adjustment unit,
• wherein the tool is separated from the image projection apparatus and adapted to hold the optical element in front of the two eyes.

An image projection method comprising:

• a positional information acquisition process of acquiring three-dimensional positional information of an image display light diffraction optical element provided in front of each of two eyes, wherein the three-dimensional positional information includes a distance from an image projection apparatus to the image display light diffraction optical elements;
• an image display light adjustment process of adjusting projected image display light on a basis of the three-dimensional positional information acquired in the positional information acquisition process;
• and
• a projection process of projecting the image display light from one projection optical system toward the image display light diffraction optical elements within a region covering the two eyes, the image display light having been adjusted in the image display light adjustment process,
• wherein the image display light diffraction optical elements are separated from the image projection apparatus and arranged in front of the two eyes, respectively.