Optical configurations for head-worn see-through displays
First Claim
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1. A head-worn computer, comprising:
- a see-through optical system adapted to visually present digital content to an eye of a person wearing the head-worn computer, wherein the person can see a surrounding environment through the see-through optical assembly, the see-through optical system further comprising;
i. an image source adapted to generate display light based on the digital content; and
ii. a partially reflective combiner positioned in front of the eye of the person and below the image source, the partially reflective combiner comprising an optically flat surface with a lower surface portion proximate the eye of the person and an upper surface portion angled away from the eye of the person, wherein the optically flat reflective surface is positioned such that an angle of incidence of light impinging upon the optically flat surface is equal to an angle of reflection, the partially reflective combiner adapted to provide at least the following;
a. reflecting off the optically flat surface at least a first portion of the display light toward the user'"'"'s eye such the person perceives the digital content as an image,b. transmitting at least a second portion of the display light toward a light trap positioned below the partially reflective combiner, wherein the light trap is a light absorbing material adapted to absorb at least a substantial portion of the transmitted second portion of the display light in order to reduce the amount of transmitted second portion of the display light illuminating the person'"'"'s face in an area below the head-worn computer,c. reflecting off the optically flat surface at least a first portion of light received from the surrounding environment toward a camera positioned below the partially reflective combiner, andd. transmitting a portion of the light received from the surrounding environment toward the user'"'"'s eye to provide the see-through view of the surrounding environment.
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Abstract
Aspects of the present invention relate to methods and systems for providing a high transmission see-through view of the environment while trapping escaping light from the display system. In embodiments, a camera system is also provided that is aligned with the display system to provide images of the environment in a viewing direction of the user.
938 Citations
11 Claims
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1. A head-worn computer, comprising:
a see-through optical system adapted to visually present digital content to an eye of a person wearing the head-worn computer, wherein the person can see a surrounding environment through the see-through optical assembly, the see-through optical system further comprising; i. an image source adapted to generate display light based on the digital content; and ii. a partially reflective combiner positioned in front of the eye of the person and below the image source, the partially reflective combiner comprising an optically flat surface with a lower surface portion proximate the eye of the person and an upper surface portion angled away from the eye of the person, wherein the optically flat reflective surface is positioned such that an angle of incidence of light impinging upon the optically flat surface is equal to an angle of reflection, the partially reflective combiner adapted to provide at least the following; a. reflecting off the optically flat surface at least a first portion of the display light toward the user'"'"'s eye such the person perceives the digital content as an image, b. transmitting at least a second portion of the display light toward a light trap positioned below the partially reflective combiner, wherein the light trap is a light absorbing material adapted to absorb at least a substantial portion of the transmitted second portion of the display light in order to reduce the amount of transmitted second portion of the display light illuminating the person'"'"'s face in an area below the head-worn computer, c. reflecting off the optically flat surface at least a first portion of light received from the surrounding environment toward a camera positioned below the partially reflective combiner, and d. transmitting a portion of the light received from the surrounding environment toward the user'"'"'s eye to provide the see-through view of the surrounding environment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification