Light guide device, virtual image display appratus, and method for manufacturing light guide device

A method for manufacturing a light guide device including a light guide member that has a plurality of optical surfaces including a nonaxisymmetric curved surface, introduces video image light into the light guide device, and guides the video image light through internal reflection to cause the video image light to exit out of the light guide device and a hard coat layer that is formed in a coating liquid application process and forms a surface portion that forms at least part of the plurality of optical surfaces of the light guide member,

• the light guide member having a connection portion that connects, among the plurality of optical surfaces, a first optical surface and a second optical surface to each other, and the connection portion providing a non-uniform height difference between the first optical surface and the second optical surface, the method comprising:
• a coating liquid application step of applying a coating liquid that is to form the hard coat layer onto a substrate that is to form the light guide device;
• and
• a layer formation step of forming, based on the coating liquid applied onto a surface of the substrate in the coating liquid application step, the hard coat layer on a surface portion of the substrate that includes a portion that is to form a portion from the first optical surface to the second optical surface.