Patent ID: 11921287
Assignee: MAXELL, LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. An information display apparatus displaying image information of a virtual image on a windshield or a combiner of a vehicle, comprising:
a housing,
wherein a part of the housing has an opening and a transparent cover formed on the opening,
wherein the housing includes:
an image-light generating apparatus configured to generate image light that displays the image information; and
an optical system configured to allow a driver of the vehicle to recognize the image information of the image light from the image-light generating apparatus as the virtual image in front of the windshield,

wherein when S-polarized light on the windshield or the combiner is assumed to be a first polarized wave while polarized light that orthogonally crosses the S-polarized light in a polarizing direction is assumed to be a second polarized wave, the image-light generating apparatus is configured to generate the image light made of the first polarized wave,
wherein a controller configured to block a part of visible light rays or infrared rays of the first polarized wave and the second polarized wave of incident external light entering the housing from the opening is provided, and
wherein the controller is a lens in which at least two transparent members are joined to each other, the lens having two joint surfaces orthogonal to each other, a plane made of an optical axis and a normal line of the two joint surfaces is parallel to or orthogonally crosses the polarizing direction of the second polarized wave, and a dielectric multilayer film is stacked on the two joint surfaces.