Compact red-green-blue beam illuminator and expander

Abstract

A compact multicolor beam illuminator and a compact multicolor beam expander are presented. The illuminator performs the dual task of demultiplexing a narrow red-green-blue (RGB) input beam into three separate beams, each of a different color, and expanding them to yield three separate magnified plane waves. The beam expander expands a narrow RGB input beam into a single magnified RGB plane wave. The design and recording procedures, along with experimental results for a beam illuminator and a beam expander with a magnification of approximately 3, are presented.

Optimization of Photopolymer Materials for the Fabrication of a Holographic Waveguide

“…In recent years, planar waveguide technology with holographic optical elements has been widely used in such devices [3,4,5]. This technology could drastically reduce the size and weight of display systems [6,7,8]. However, there are still some technical difficulties when manufacturing such devices.…”

A high‐efficiency holographic waveguide display system with a prism in‐coupler

“…And the index modulation Δ n and thickness d are 0.02 and 30 µm, respectively. It has been concluded that the efficiency of a volume holographic grating drops to zero when the wavelength deviation from Bragg condition satisfies the following approximate relation: …”

Analysis of the Imaging Characteristics of Holographic Waveguides Recorded in Photopolymers

“…In this case, the optical waveguide is fabricated by using holographic technologies [4]. The complex system of lenses used to generate a virtual image for the user is substituted by a holographic waveguide what reduces the size and weight of the display systems [5,6]. Based on the same principles, the holographic waveguides have also been introduced in the fabrication of "see through" glasses, which exploit the concept of augmented reality or virtual reality.…”