Dual-mirror virtual image display for vehicle instrument...

Details Dual-mirror virtual image display for vehicle instrument... Dual-mirror virtual image display for vehicle instrument...

G - Physics

02

B

343/70, 88/73

G02B 27/00 (2006.01) G02B 27/01 (2006.01)

Patent

CA 2030874

A virtual image display for vehicles that includes an image source for providing imaging illumination, a negative power aspheric off-axis mirror responsive to the image source imaging illumination for providing diverging reflected imaging illumination, and a positive power aspheric off-axis mirror responsive to the diverging imaging illumination for providing converging reflected imaging illumination that produces a virtual image of the image source observable by the vehicle operator at a viewing distance that is greater than the optical path travelled by the imaging illumination from the image source and the eyes of the vehicle operator. The use of a negative power mirror with a positive power mirror pro- vides for a compact display system which can include relatively large image sources such as electromechanical gauges, and which provides for a relatively far viewing distance and a relatively large field of view.

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