Optical system for use as head mounted display device, has lens designed for beam angle that is smaller than another beam angle, and comprising multi-layer filter layer, where light beam bundle strikes multi-layer filter layer

摘要

The system (1) has a source (6) e.g. LCD module, with a bright point that emits a light beam bundle with a beam angle. A lens (4) is arranged downstream to the source for forming the bright point in an image plane. The lens is designed for another beam angle that is smaller than the former beam angle, and comprises a multi-layer filter layer (13). The light beam bundle strikes the filter layer. The filter layer transmits a portion of the light beam bundle and reflects non-routed portion of the light beam. The filter layer is formed on a flat interface of an optical element of the lens.