Image combiner and image display device

Details Image combiner and image display device Image combiner and image display device

2006-06-27

2006-06-27

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

C359S013000, C359S630000, C345S007000

Reexamination Certificate

active

07068404

ABSTRACT:
An image combiner causes light from an image display element to be superimposed on light that is transmitted through a plate-form part positioned in front of the eye of a user. The light from the image display element reaches the eye of the user after being diffracted and reflected by a reflective type HOE inside the plate-form part. The HOE has a third-order or higher phase conversion action that depends on the position on the hologram plane. The distance Rd (calculated in air) between the light source that is on the side of the eyes of the observer during end-use (of the two light sources used to expose the HOE during the manufacture of the HOE) and the HOE is substantially greater than the distance Pd (calculated in air) between the exit pupil of the image combiner and the HOE.

REFERENCES:
patent: 6816132 (2004-11-01), Tanijiri et al.
patent: 2001/0038361 (2001-11-01), Tanjiri et al.
patent: 11-064781 (1999-03-01), None
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RelatedU.S. Appl. No. 11/032,202, filed Jan. 10, 2005; Inventor: Yuiko Ouchi; Title: Image Combiner and Image Display Unit.

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