Holographic substrate-guided wave-based see-through display

Patent metadata

Field	Value
Publication number	US-10274660-B2
Application number	US-62053809-A
Country	US
Kind code	B2
Filing date	Nov 17, 2009
Priority date	Nov 17, 2008
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A holographic substrate-guided wave-based see-through display has a microdisplay, capable of emitting light in the form of an image. The microdisplay directs its output to a holographic optical element, capable of accepting the image from the microdisplay, and capable of transmitting the light. The holographic optical element couples its output to an elongate substrate, capable of accepting the light from the holographic optical element at a first location, and transmitting the light along a length of the substrate by internal reflection to a second location, the elongate substrate being capable of transmitting the accepted light from the second location. The substrate couples out what it receives to a transparent holographic optical element, capable of accepting the light transmitted from the substrate and transmitting it to a location outside of the holographic optical element as a viewable image.

First claim

The invention claimed is:

1. A holographic substrate-guided wave based see through display comprising:
a light source positioned to illuminate a reflective area;
a single transparent substrate;
a transparent first holographic lens laminated to the substrate on an exterior side of the substrate and accepting light reflected by the reflective area in the form of an image of the reflective area, and diffracting the accepted light in single diffraction order;
the substrate, being elongate and having a thickness and a length accepting the light diffracted by the transparent first holographic lens at a second location on the exterior side that is transparent through its thickness, and transmitting the light accepted at the second location along the length of the substrate by total internal reflection to a first location on the exterior side spaced from the second location along the length of the substrate, the substrate transmitting the light accepted at the second location from the first location;
a transparent second holographic lens laminated to the exterior side of the substrate spaced from the second location and accepting the light transmitted from the substrate at the first location and diffracting it in single diffraction order at different angles to a location outside of the second holographic lens as a viewable image of the reflective area;
a camera accepting the viewable image of the reflective area from the second holographic optical element, and capturing the viewable image of the reflective area,
wherein the apparatus is transparent in the direction of the thickness at the second location to have a see-through display;
a microdisplay, emitting light in the form of a microdisplay image;
a third holographic lens accepting the emitted light in the form of the microdisplay image from the microdisplay, and diffracting the accepted light in a single diffraction order;
the substrate having a third location accepting the light diffracted from the third holographic lens and transmitting the light accepted at the third location along the length of the substrate by internal reflection to a fourth location, the substrate being transparent through the thickness at the fourth location and transmitting the light accepted at the third location from the fourth location; and
a fourth holographic lens accepting the light transmitted by the substrate at the fourth location diffracting the accepted light in single diffraction order and transmitting it to the reflective area, as a viewable image of the microdisplay,
wherein the display is transparent in a direction through the thickness of the substrate at the fourth location and at least one of the third holographic lens and fourth holographic lens has optical power.

Assignees

• Dimov Fedor
• Aye Tin
• Yu Kevin
• Soboleva Svetlana
• Yin Khin Swe
• Kyaw Myo
• Voloschenko Dmitry
• Luminit Llc

Inventors

• Dimov Fedor
• Aye Tin
• Yu Kevin
• Soboleva Svetlana
• Yin Khin Swe
• Kyaw Myo
• Voloschenko Dmitry

Classifications

• G02B5/188

  Plurality of such optical elements formed in or on a supporting substrate · CPC title

• G02B5/32 Primary

  Holograms used as optical elements · CPC title

• G03H2001/261

  in optical contact · CPC title

• G02B27/0172

  characterised by optical features · CPC title

• G03H2270/21

  Curved bearing surface · CPC title