Collimating optical device and system

摘要

There is provided a light-guide, compact collimating optical device, including a light-guide having a light-waves entrance surface, a light-waves exit surface and a plurality of external surfaces, a light-waves reflecting surface carried by the light-guide at one of the external surfaces, two retardation plates carried by light-guides on a portion of the external surfaces, a light-waves polarizing beamsplitter disposed at an angle to one of the light-waves entrance or exit surfaces, and a light-waves collimating component covering a portion of one of the retardation plates. A system including the optical device and a substrate, is also provided.

主权项

1. A light-guide, compact imaging optical system, comprising:
at least one display light source for producing light waves; an optical device composed of a light-waves transmitting material for collimating light waves, the device having at least one light-waves entrance surface, at least two light-waves exit surfaces and a plurality of external surfaces; at least two retardation plates each one carried by the optical device on at least a portion of an external surface of the plurality of external surfaces; at least one light-waves polarizing beamsplitter disposed at an angle to the at least one of the light-waves entrance or exit surfaces; at least two light-waves collimating components, each one covering at least a portion of at least one of the retardation plates; at least two light-transmitting substrates, each substrate having at least two major surfaces parallel to each other, edges, light-waves input aperture and at least one partially reflecting surface located in one of the substrates; and at least one optical element for coupling light-waves from the optical device into the substrates by internal reflection; wherein the display light source is positioned adjacent to the entrance surface of the optical device for producing image light-waves to be coupled through the entrance surface into the optical device, and the input aperture of the light-transmitting substrates are positioned adjacent to an exit surface of the optical device.