Patent ID: 6473209
Filing Date: 2002-10-29
Classification: G02B

Abstract:
An apparatus comprising:a light generator configured to receive image signals, wherein the light generator is configured to sequentially generate light beams in response to receiving the image signals; a light diffuser configured to sequentially receive and diffuse each of the light beams into respective light beam components; a first switchable holographic optical element (SHOE) configured to receive first components of a first light beam diffused by the diffuser, wherein the first SHOE is switchable between an active state and an inactive state, wherein the first SHOE is configured to deflect the first components into deflected first components when operating in the active state, and wherein the first SHOE is configured to transmit the first components without substantial alteration when operating in the inactive state; second SHOE optically positioned between the first SHOE and the light diffuser, wherein the second SHOE is configured to receive components of a second light beam diffused by the diffuser, wherein the second SHOE is switchable between an active state and an inactive state, wherein the second SHOE is configured to deflect the second components into deflected second components when operating in the active state, and wherein the second SHOE is configured to transmit the second components without substantial alteration when operating in the inactive state.