High-power laser scanning color display using a compact beam collimation system

Abstract

A laser beam-scanning display using a new red–green–blue (RGB) laser beam collimation system was demonstrated. The collimation system used here has only one single lens, but can simultaneously collimate three RGB laser beams. The characteristic features of the system are 1) a simple and compact configuration, 2) simultaneous shaping of all RGB beams from elliptical to circular, 3) Gaussian-like RGB beams, 4) reduction of dead space in the projected image caused by non-coaxial beams, and 5) high laser power transmission (>100 mW).

The laser beam-scanning display constructed with this collimation system provides clear full-color 720p movie images, which verifies its performance. Thus, the laser beam-scanning display shown here is a compact display system that can be embedded not only in head-mounted displays or augmented reality glasses but also in high-power head-up displays for automobile applications.