Air floating video information display system and stereo sensing apparatus used therein
An air floating video display system contributes to Sustainable Development Goals 3, 9 and 11. The air floating video display system includes a video display apparatus configured to display a video, a light source apparatus, and a retroreflector configured to reflect a video light from the video display apparatus to display an air floating video that is a real image in air by the reflected light. The light source apparatus includes optical means configured to reduce a divergence angle of a light from a point or surface light source and a reflection surface configured to reflect the light from the light source to propagate it to the video display apparatus, and a part of the divergence angle of the light flux emitted from the light source is adjusted by a shape and surface roughness of the reflection surface provided on the light source.
1 . An air floating video display system comprising:
a video display apparatus configured to display a video;
a light source apparatus; and
a retroreflector configured to reflect a video light from the video display apparatus to display an air floating video that is a real image in air by the reflected light,
wherein the light source apparatus includes:
an optical member configured to reduce a divergence angle of a light from a point or surface light source; and
a reflection surface configured to reflect the light from the light source to propagate it to the video display apparatus,
wherein a first ranging apparatus in which a plurality of TOF (Time of Flight) systems each having a light source and a light receiver are arranged in a matrix and with which a plurality of divided areas of a space including the air floating video are sensed by a light from the light source of each TOF system is provided,
wherein the light source light of the TOF system is emitted toward the air floating video,
wherein the system further comprisescomprising a three-dimensional ranging system,
wherein the three-dimensional ranging system includes a plurality of ranging apparatuses,
wherein the ranging apparatuses include the first ranging apparatus configured to capture space information including the air floating video and a second ranging apparatus configured to capture, by a two-dimensional image sensor, two-dimensional image information of a plane where the air floating video is formed, and
wherein the three-dimensional ranging system converts position information obtained from the plurality of ranging apparatuses controlled by a synchronization signal common in the ranging system into three-dimensional position information by performing arithmetic operations.
2 . An air floating video display system comprising:
a video display apparatus configured to display a video;
a light source apparatus; and
a retroreflector configured to reflect a video light from the video display apparatus to display an air floating video that is a real image in air by the reflected light,
wherein the light source apparatus includes:
an optical member configured to reduce a divergence angle of a light from a point or surface light source; and
a reflection surface configured to reflect the light from the light source to propagate it to the video display apparatus,
wherein a first ranging apparatus in which a plurality of TOF (Time of Flight) systems each having a light source and a light receiver are arranged in a matrix and with which a plurality of divided areas of a space including the air floating video are sensed by a light from the light source of each TOF system is provided,
wherein the light source light of the TOF system is emitted toward the air floating video,
wherein the system further comprises a three-dimensional ranging system, and
wherein a wavelength of a light source light of the TOF system provided in a ranging apparatus constituting the three-dimensional ranging system is a long wavelength of 900 (nm) or more.
3 . An air floating video display system comprising:
a video display apparatus configured to display a video;
a light source apparatus; and
a retroreflector configured to reflect a video light from the video display apparatus to display an air floating video that is a real image in air by the reflected light,
wherein the light source apparatus includes:
an optical member configured to reduce a divergence angle of a light from a point or surface light source; and
a reflection surface configured to reflect the light from the light source to propagate it to the video display apparatus,
wherein a first ranging apparatus in which a plurality of TOF (Time of Flight) systems each having a light source and a light receiver are arranged in a matrix and with which a plurality of divided areas of a space including the air floating video are sensed by a light from the light source of each TOF system is provided,
wherein the light source light of the TOF system is emitted toward the air floating video,
wherein the light source apparatus includes:
a point or surface light source;
a reflector configured to reflect the light from the light source; and
a light guide configured to guide the light from the reflector toward a display panel, and
wherein a reflection surface of the reflector has an asymmetrical shape with respect to an optical axis of the light emitted from the light source.
4 . The air floating video display system according to claim 3 ,
wherein the light guide is a reflective light guide configured to guide the light by reflection on a reflection surface on a surface of the light guide.
5 . The air floating video display system according to claim 3 , comprising:
a diffusion plate configured to diffuse the light from the light guide; and
a side wall arranged to sandwich a space between the light guide and the diffusion plate.
6 . The air floating video display system according to claim 3 ,
wherein the reflector is made of a plastic material, a glass material, or a metal material.