Image combiner and image display

Details Image combiner and image display Image combiner and image display

2006-08-01

2006-08-01

Boutsikaris, Leonidas (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S013000, C359S014000, C359S015000, C359S630000, C345S009000

Reexamination Certificate

active

07085027

ABSTRACT:
The light from the image forming element2is reflected by the PBS8, and is incident on the λ/4 plate7so that this light is converted into circularly polarized light. Subsequently, the light is subjected to a reflection/diffraction effect and image focusing effect by the reflective type HOE6. Then, this light again passes through the λ/4 plate7, and is transmitted through the PBS8. As a result, the light enters the eye of the user after being synthesized with light from the outside world. The system is devised so that the relationships of −5<θ1<5 and |θ1−θ2|<3 are established between the angle of incidence θ1 (°) at which the principal rays emitted from the center of the display part of the image forming means are incident on the reflective type holographic optical element, and the reflection/diffraction angle θ2 (°) when this light is diffracted/reflected by the reflective type holographic optical element. This makes it possible to achieve the improvement of the image quality of the display image in cases where the center of the pupil of the eye of the user deviates from the center of the exit pupil of the image combiner.

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