Patent ID: 6867889

Claim:
A system, comprising: a holographic optical element (HOE) device having: a first element having first and second surfaces, the first surface being positionable to face incident light rays, an emulsion material disposed over the second surface of the first element and having a recorded interference pattern thereon, and a second element having a first surface disposed over the emulsion material, the second element being structured to pass resulting light rays, derived from the incident light rays diffracted by the recorded interference pattern, in a direction towards a location facing a second surface of the second element; an optical processing unit to receive the resulting light rays passed by the second element; a collimating optical assembly positionable between the HOE device and the optical processing unit to collimate the resulting light rays; and an optical element positionable between the collimating optical assembly and the optical processing unit to separate, from the collimated resulting light rays, a tracking channel and a communication channel, and to direct the communication channel towards the optical processing unit.