Augmented reality projection device

An augmented reality projection device comprising:

• an excitation light source configured to generate excitation light which is applied to a fluorescent light generation area to excite a fluorescent material;
• a fluorescent light detector configured to detect fluorescent light generated in the fluorescent light generation area and generate a fluorescent image, the fluorescent light including a fluorescent light detection area corresponding to the fluorescent light generation area;
• a projector configured to convert an image signal for displaying a visual indicator in the fluorescent light generation area into visual indicator light, the visual indicator being generated to correspond to the identified fluorescent light detection area;
• an image sensor configured to generate a color signal using visible light which is reflected from the fluorescent light generation area to which a visual indicator has been projected using the visual indicator light;
• and
• a coaxial optics configured to deliver the excitation light and the visual indicator light to the fluorescent light generation area and deliver the fluorescent light to the fluorescent light detector,
• wherein the excitation light, the fluorescent light, and the visual indicator light pass through optical paths which are partially common by the coaxial optics,
• wherein the coaxial optics includes:
• an optical path branching/merging unit configured to cause an optical path of the excitation light and an optical path of the visual indicator light to be substantially identical to each other and substantially branch an optical path of the fluorescent light and an optical path of the visible light from the optical path of the excitation light;
• a relay optics configured to deliver the excitation light, the fluorescent light, the visual indicator light, and the visible light in processing directions thereof;
• a half pentaprism horizontally coupled to the relay optics and configured to incline the optical path of the excitation light and the optical path of the visual indicator light, and cause the optical path of the fluorescent light and the optical path of the visible light to be horizontal;
• and
• an objective optics obliquely coupled to the half pentaprism and configured to deliver the excitation light and the visual indicator light emitted from the half pentaprism to the fluorescent light generation area and to deliver the fluorescent light and the visible light emitted from the fluorescent light generation area to the half pentaprism.

An augmented reality projection device comprising:

• an excitation light source configured to generate excitation light which is applied to a fluorescent light generation area to excite a fluorescent material;
• a fluorescent light detector configured to detect fluorescent light generated in the fluorescent light generation area and generate a fluorescent image, the fluorescent light including a fluorescent light detection area corresponding to the fluorescent light generation area;
• a projector configured to convert an image signal for displaying a visual indicator in the fluorescent light generation area into visual indicator light, the visual indicator being generated to correspond to the identified fluorescent light detection area;
• an image sensor configured to generate a color signal using visible light which is reflected from the fluorescent light generation area to which a visual indicator has been projected using the visual indicator light;
• and
• a coaxial optics configured to deliver the excitation light and the visual indicator light to the fluorescent light generation area and deliver the fluorescent light to the fluorescent light detector, wherein the excitation light, the fluorescent light, and the visual indicator light pass through optical paths which are partially common by the coaxial optics,
• wherein the coaxial optics includes an optical path branching/merging unit configured to cause an optical path of the excitation light and an optical path of the visual indicator light to be substantially identical to each other and substantially branch an optical path of the fluorescent light and an optical path of the visible light from the optical path of the excitation light, and
• wherein the optical path branching/merging unit includes:
• a first dichroic mirror that is disposed oblique at a position at which the excitation light emitted from the excitation light source and progressing horizontally and the fluorescent light progressing vertically to the fluorescent light detector intersect each other and is configured to reflect the excitation light and to transmit the fluorescent light;
• a second dichroic mirror that is disposed oblique at a position at which the visual indicator light emitted from the projector and progressing horizontally and the excitation light reflected by the first dichroic mirror and progressing vertically intersect each other and is configured to reflect the excitation light and the fluorescent light and to transmit the visual indicator light;
• and
• a third dichroic mirror that is disposed oblique between the second dichroic mirror and the projector and is configured to transmit the visual indicator light and to reflect the visible light.