Patent ID: 11940624
Assignee: BLUE OPTECH CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC F  G

Claim 1:
2. The optical device claimed in claim 1, in which:
the image light has an image light angle corresponding to the angle of view of the display image;
a center image light passing through the center line of the image light angle in the image light corresponds to the center of the display image;
a one side image light passing through a half straight line in one side of the image light angle in the image light corresponds to one end of the display image;
an other side image light passing through another half straight line in the other side of the image light angle in the image light corresponds to the other end of the display image;
each of the plurality of half mirrors is an optical member having a reflection characteristic that the incident angle of the image light on the back surface of each of the plurality of half mirrors becomes larger toward the other side image light side, and that the amount of image light on the other side image light side passing through each of the plurality of half mirrors is reduced, because a part of the image light on the other side image light side is reflected on the back surface; and
the incident angle adjusting member is an optical member for adjusting the incident angle of the image light on the main surface of the light guide in accordance with the amount of image light on the other side image light side reduced due to the reflection characteristic of each of the plurality of half mirrors to form an image light not satisfying the total reflection condition on the main surface in a part of the image light on the one side image light side that is the other part of the image light, and reducing the amount of image light on the one sided image light side that is totally reflected on the main surface in the light guide to balance the brightness of the displayed image, when a part of the image light on the one side image light side that does not satisfy the total reflection condition is transmitted from the main surface to the outside.