Patent ID: 11933980
Assignee: MAXELL, LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. An information display apparatus configured to display video information of a virtual image on a reflecting surface of conveyance, the information display apparatus comprising:
a display configured to display the video information; and
a virtual image optical system configured to display a virtual image at a front of the conveyance by reflecting light emitted from the display by means of the reflecting surface,
wherein the virtual image optical system includes a concave mirror and an optical element,
wherein the optical element is arranged between the display and the concave mirror, and is configured to correct distortion of the virtual image obtained so as to correspond to a viewpoint position of a driver on a basis of a shape of the concave mirror and a shape of the optical element,
wherein the information display apparatus further comprises a virtual image double image conversion reducer configured to reduce double image conversion of the virtual image, the double image conversion occurring due to reflection of a video light flux with a front surface and a back surface of the reflecting surface, and
wherein the virtual image double image conversion reducer is configured so that to reduce aberration that occurs outside a main ray in the virtual image optical system, a ray passing through an upper peripheral portion of a pupil among a video light flux that converges in an image point of a virtual image surface by the video light flux from respective object points of video light from the display travels toward an inside of the main ray.