Optical apparatus including non-electric type touch panel

An optical apparatus comprising:

• a touch substrate;
• a waveguide layer, disposed on the touch substrate, the waveguide layer comprising a plurality of waveguides;
• an optical output structure, which is disposed on the waveguide layer and is configured to output light propagating in the plurality of waveguides at touched locations of the touch substrate;
• a gap layer disposed between the waveguide layer and the optical output structure and providing a gap between the waveguide layer and the optical output structure;
• an optical system, which projects light output by the optical output structure;
• and
• a transparent fixing member disposed on the gap layer such that the transparent fixing member covers the optical output structure,
• wherein the optical output structure comprises an array of reversed trapezoidal micro-prisms, and
• wherein the array of reversed trapezoidal micro-prisms are disposed between the gap layer and a light exit surface of the transparent fixing member.