Information display device

Details Information display device Information display device

2005-07-19

2005-07-19

Robinson, Mark A. (Department: 2872)

Optical: systems and elements

Holographic system or element

Head up display

C359S015000, C359S630000, C345S007000

Reexamination Certificate

active

06919976

ABSTRACT:
An information display device provided with a prism having at least two reflecting surfaces arranged in facing each other and a hologram surface formed of a reflection-type hologram. And at least one of the two reflecting surfaces is a light-beam-selective surface that selectively transmits or reflects light in accordance with its incident angle. An image light emitted from an image display means enters the prism, and is reflected between the reflecting surfaces, and then is diffractively reflected on the hologram surface, and, after being transmitted through the light-beam-selective surface, is directed to an observer's pupil.

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