Optical scanner, display system, and mobile object

A display system comprising:

• an optical scanner including,
• a light source configured to emit irradiation light,
• a light deflector configured to scan the irradiation light emitted from the light source in a first scanning direction and in a second scanning direction intersecting with the first scanning direction,
• a photodetector configured to detect the irradiation light when the light deflector scans a detection field;
• and
• circuitry configured to,
• turn on the light source in a first irradiation field scanned by the light deflector from the detection field to an end in the first scanning direction and turn on the light source in a second irradiation field scanned by the light deflector from the end in the first scanning direction towards the detection field, and
• cause a position of an edge of the first irradiation field on the detection field side to move in the first scanning direction closer to the detection field from a position away from the detection field and cause a position of an edge of the second irradiation field on the detection field side to move in the first scanning direction closer to the detection field;
• an imaging optical system configured to reflect projection light projected from a screen on which the irradiation light is scanned by the light deflector;
• and
• a reflector configured to reflect reflection light reflected by the imaging optical system,
• wherein the imaging optical system projects the projection light towards the reflector to form a virtual image.

A mobile object that includes a display system, the display system comprising:

• an optical scanner including,
• a light source configured to emit irradiation light,
• a light deflector configured to scan the irradiation light emitted from the light source in a first scanning direction and in a second scanning direction intersecting with the first scanning direction,
• a photodetector configured to detect the irradiation light when the light deflector scans a detection field;
• and
• circuitry configured to,
• turn on the light source in a first irradiation field scanned by the light deflector from the detection field to an end in the first scanning direction and turn on the light source in a second irradiation field scanned by the light deflector from the end in the first scanning direction towards the detection field, and
• cause a position of an edge of the first irradiation field on the detection field side to move in the first scanning direction closer to the detection field and cause a position of an edge of the second irradiation field on the detection field side to move in the first scanning direction closer to the detection field;
• an imaging optical system configured to reflect projection light projected from a screen on which the irradiation light is scanned by the light deflector;
• and
• a front windshield configured to reflect reflection light reflected by the imaging optical system,
• wherein the imaging optical system projects the projection light towards the front windshield to form a virtual image.