Optical apparatus
An optical apparatus includes an illumination module, a first structured light generation module, a second structured light generation module and a beam splitting unit. The beam splitting unit is arranged between the illumination module, the first structured light generation module and the second structured light generation module. When a source beam from the illumination module is received by the beam splitting unit, the source beam is split into a first light beam and a second light beam. The first light beam is propagated in a direction toward the first structured light generation module. The second light beam is propagated in a direction toward the second structured light generation module. After the first light beam passes through the first structured light generation module, a first structured light is generated. After the second light beam passes through the second structured light generation module, a second structured light is generated.
1. An optical apparatus, comprising:
an illumination module providing a source beam;
a first structured light generation module;
a second structured light generation module;
a beam splitting unit arranged between the illumination module, the first structured light generation module and the second structured light generation module, wherein when the source beam is received by the beam splitting unit, the source beam is split into a first light beam and a second light beam, wherein the first light beam is propagated in a direction toward the first structured light generation module, and the second light beam is propagated in a direction toward the second structured light generation module; and
a casing with a first output port and a second output port, wherein the illumination module and the beam splitting unit are accommodated within the casing, the first structured light generation module is installed in the first output port, and the second structured light generation module is installed in the second output port,
wherein a first structured light is generated after the first light beam passes through the first structured light generation module, and a second structured light is generated after the second light beam passes through the second structured light generation module.
2. The optical apparatus according to claim 1 , wherein the illumination module comprises a light source, wherein the light source comprises a laser diode, a light emitting diode and/or an organic light emitting diode.
3. The optical apparatus according to claim 2 , wherein the illumination module further comprises a collimating unit, wherein the collimating unit is arranged between the light source and the beam splitting unit, wherein after a light beam passes through the collimating unit, the light beam is collimated by the collimating unit and directed to the beam splitting unit.
4. The optical apparatus according to claim 3 , wherein the illumination module further comprises a beam expansion unit, wherein the beam expansion unit is arranged between the light source and the collimating unit, wherein after a light beam passes through the beam expansion unit, the light beam is expanded by the beam expansion unit and directed to the collimating unit.
5. The optical apparatus according to claim 1 , wherein the source beam has a wavelength in a first wavelength range, a second wavelength range and/or a thermal band.
6. The optical apparatus according to claim 1 , wherein the beam splitting unit is a polygonal block-type beam splitter, and the polygonal block-type beam splitter has a first surface and a second surface, wherein a ridge line is arranged between the first surface and the second surface, and the ridge line of the polygonal block-type beam splitter faces an incident direction of the source beam, wherein the first light beam is generated after a first-portion beam of the source beam is reflected by the first surface, and the second light beam is generated after a second-portion beam of the source beam is reflected by the second surface.
7. The optical apparatus according to claim 6 , wherein the polygonal block-type beam splitter is a polygonal pyramid or a polygonal prism.
8. The optical apparatus according to claim 1 , wherein the beam splitting unit has an aspheric surface, and a top part of the aspheric surface faces an incident direction of the source beam, wherein after the source beam is reflected by the aspheric surface, the first light beam and the second light beam are generated.
9. The optical apparatus according to claim 1 , wherein the first structured light generation module comprises a first structured light output unit, wherein the first structured light output unit comprises a first diffractive optical element, a first refractive optical element and/or a first reflective optical element.
10. The optical apparatus according to claim 9 , wherein the first structured light generation module further comprises a first collimating unit, wherein the first collimating unit is arranged between the first structured light output unit and the beam splitting unit, wherein after the first light beam from the beam splitting unit is collimated by the first collimating unit, the collimated first light beam is directed to the first structured light output unit.
11. The optical apparatus according to claim 1 , wherein the second structured light generation module comprises a second structured light output unit, wherein the second structured light output unit comprises a second diffractive optical element, a second refractive optical element and/or a second reflective optical element.
12. The optical apparatus according to claim 11 , wherein the second structured light generation module further comprises a second collimating unit, wherein the second collimating unit is arranged between the second structured light output unit and the beam splitting unit, wherein after the second light beam from the beam splitting unit is collimated by the second collimating unit, the collimated second light beam is directed to the second structured light output unit.
13. The optical apparatus according to claim 1 , wherein at least one of the first structured light generation module and the second structured light generation module is a film-type component.
14. The optical apparatus according to claim 1 , wherein when the first structured light is projected on a projection surface, a first structured light pattern is formed on the projection surface, wherein the first structured light pattern comprises a point pattern set, a stripe pattern set and/or a grid pattern set.
15. The optical apparatus according to claim 1 , wherein when the second structured light is projected on a projection surface, a second structured light pattern is formed on the projection surface, wherein the second structured light pattern comprises a point pattern set, a stripe pattern set and/or a grid pattern set.
16. The optical apparatus according to claim 1 , wherein when the source beam is received by the beam splitting unit, a portion of the source beam is transmitted through the beam splitting unit, so that a third light beam is outputted from the beam splitting unit.
17. The optical apparatus according to claim 1 , wherein the first structured light and the second structured light are coherent with each other, wherein when the first structured light and the second structured light are projected on a projection surface, at least one interference fringe is formed on the projection surface.
18. The optical apparatus according to claim 17 , wherein the first structured light and the second structured light are intermittently coherent with each other according to a predetermined time sequence, so that the at least one interference fringe is intermittently formed on the projection surface.
19. The optical apparatus according to claim 17 , wherein the at least one interference fringe provides spatial recognition and/or temporal recognition.