Polarized heads up display

Details Polarized heads up display Polarized heads up display

G - Physics

02

B

343/70

G02B 27/00 (2006.01) G02B 27/01 (2006.01) G03B 21/00 (2006.01) G02B 5/30 (2006.01)

Patent

CA 2026429

POLARIZED HEAD UP DISPLAY ABSTRACT OF THE INVENTION A head-up display for vehicle including a wind- shield having first and second opposing air interfaces for partially reflecting imaging illumination at a predetermined air interface to produce a primary virtual image viewable by the operator of the vehicle, and a half-wave retarder interposed between the first and second air interfaces of the windshield for rotat- ing the linear polarization of illumination transmitted therethrough. An imaging illumination source provides linearly polarized imaging illumination to the first air interface of the windshield at an angle which is selected to enhance the reflection of S-polarized light and the transmission of P-polarized light, with the polarization being selected so as to provide S-polar- ized imaging illumination at the predetermined beam splitting air interface.

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