Patent ID: 6426811
Filing Date: 2002-07-30
Classification: G02B,G02F

Abstract:
An apparatus comprising:an array of light sensors a first electrically switchable holographic optical element (ESHOE) configured to operate between active and inactive states, wherein the first ESHOE is configured to transmit first image light without substantial alteration when the first ESHOE operates in the inactive state, and wherein the first ESHOE is configured to diffract first image light when the first ESHOE operates in the active state, wherein first image light diffracted by the first ESHOE is received by the array of light sensors, and wherein the array of light sensors are configured to generate electrical signals in response to receiving first image light diffracted by the first ESHOE; a first processing circuit in data communication with the array of light sensors, wherein the first processing circuit is configured to receive and process electrical signals generated by the array of light sensors; an image display in data communication with the first processing circuit, wherein the image display is configured to receive the processed electrical signals from the first processing circuit, and wherein the image display is configured to generate second image light in response to receiving the processed electrical signals; a second ESHOE configured to operate between active and inactive states, wherein the second ESHOE is configured to receive the second image light from the image display, wherein the second ESHOE is configured to transmit second image light received from the image display without substantial alteration when the second ESHOE operates in the inactive state, and wherein the second ESHOE is configured to diffract the second image light received from the image display when the second ESHOE operates in the active state.