CN-122016249-A - Projector for AR optical waveguide test

Abstract

The invention discloses a projector for AR optical waveguide testing, which comprises a light source module, a light gathering module, a graphic card module and a projection lens, wherein the light source module is used for providing light meeting preset requirements, the light gathering module is used for converting the light emitted by the light source module into light with a preset caliber and a preset numerical aperture, the graphic card module is used for providing a preset projection pattern, the projection lens is used for converting images of the projection pattern into emergent light with different angles, and the emergent light with all angles is converged at an exit pupil position. The embodiment of the invention can provide the image quality close to the diffraction limit, and can be widely applied to the technical field of optical instruments.

Inventors

• ZHANG CHENXING
• LI XIAO
• ZHAO YONGGANG

Assignees

• 欧拓飞科技(珠海)有限公司

Dates

Publication Date

20260512

Application Date

20260210

Claims (10)

1. 1. A projector for AR optical waveguide test is characterized by comprising a light source module, a light condensing module, a graphic card module and a projection lens, wherein, The light source module is used for providing light meeting preset requirements; the light condensing module is used for converting the light emitted by the light source module into light with a preset caliber and a preset numerical aperture; The graphic card module is used for providing a preset projection pattern; The projection lens is used for converting the image of the projection pattern into emergent light with different angles and converging the emergent light with all angles to an exit pupil position.
2. 2. The projector for AR optical waveguide testing according to claim 1, wherein the light source module comprises a plurality of first light sources, a multi-branch optical fiber bundle, and a first diaphragm, and light emitted from the plurality of first light sources is coupled through the multi-branch optical fiber bundle and transmitted to the first diaphragm.
3. 3. The projector for AR optical waveguide testing according to claim 1, wherein the condensing module comprises a first cemented lens and a second cemented lens.
4. 4. The projector for AR optical waveguide testing according to claim 2, wherein the projection lens comprises a first meniscus lens, a second meniscus lens, a third meniscus lens, a fourth meniscus lens, a fifth meniscus lens, a first biconcave lens, and a first biconvex lens.
5. 5. The projector for AR optical waveguide testing according to claim 4, wherein the total length of the projection lens is less than 240mm and the diameter of the largest lens in the projection lens is less than 70mm.
6. 6. The projector for testing AR optical waveguides according to claim 1, wherein the light source module includes a plurality of second light sources, an integrating sphere and a second diaphragm, the second diaphragm is disposed at a light outlet of the integrating sphere, and light emitted by the plurality of second light sources passes through the light outlet to reach the second diaphragm after being converged by the integrating sphere.
7. 7. The projector for AR optical waveguide testing according to claim 6, wherein the projection lens comprises a prism, a first plano-convex lens, a second plano-convex lens, a third plano-convex lens, a second biconcave lens, a plano-concave lens, a sixth meniscus lens, a seventh meniscus lens, a second biconvex lens, a third cemented lens, an eighth meniscus lens, and a fourth biconvex lens.
8. 8. The projector for AR optical waveguide testing according to claim 7, wherein the total length of the projection lens is less than 390mm and the diameter of the largest lens in the projection lens is less than 51mm.
9. 9. The projector for AR optical waveguide testing according to any one of claims 1-8, wherein the exit pupil diameter of the projection lens ranges from 1 to 5mm.
10. 10. The projector for AR optical waveguide testing according to any one of claims 1-8, further comprising a polarizer and/or a neutral filter disposed between the light gathering module and the graphics card module or between the graphics card module and the projection lens.

Description

Projector for AR optical waveguide test Technical Field The invention relates to the technical field of optical instruments, in particular to a projector for AR optical waveguide testing. Background The current augmented reality shows rapid technical development, but also faces a plurality of technical difficulties in research, development and production. Among them, the testing of the optical waveguide lens is particularly critical, and there is a lack of a projector capable of being used as a reference test to provide the optical waveguide test in the industry, so that the actual performance of the optical waveguide cannot be accurately measured, and the optical quality of the projector needs to be close to the diffraction limit, but the consumer projector cannot meet the requirements. Disclosure of Invention In view of the above, it is an object of an embodiment of the present invention to provide a projector for AR optical waveguide testing, which is capable of providing an image quality close to the diffraction limit. In one aspect, an embodiment of the present invention provides a projector for testing AR optical waveguides, including a light source module, a light condensing module, a graphics card module, and a projection lens, wherein, The light source module is used for providing light meeting preset requirements; the light condensing module is used for converting the light emitted by the light source module into light with a preset caliber and a preset numerical aperture; The graphic card module is used for providing a preset projection pattern; The projection lens is used for converting the image of the projection pattern into emergent light with different angles and converging the emergent light with all angles to an exit pupil position. Optionally, the light source module includes a plurality of first light sources, a multi-branch optical fiber bundle and a first diaphragm, and light emitted by the plurality of first light sources is coupled through the multi-branch optical fiber bundle and transmitted to the first diaphragm. Optionally, the condensing module includes a first cemented lens and a second cemented lens. Optionally, the projection lens includes a first meniscus lens, a second meniscus lens, a third meniscus lens, a fourth meniscus lens, a fifth meniscus lens, a first biconcave lens, and a first biconvex lens. Optionally, the total length of the projection lens is less than 240mm, and the diameter of the largest lens in the projection lens is less than 70mm. Optionally, the light source module includes a plurality of second light sources, integrating sphere and second diaphragm, the second diaphragm sets up the light outlet of integrating sphere, a plurality of light that the second light source sent is after the integrating sphere gathers, through the light outlet reaches the second diaphragm. Optionally, the projection lens includes a prism, a first plano-convex lens, a second plano-convex lens, a third plano-convex lens, a second biconcave lens, a plano-concave lens, a sixth meniscus lens, a seventh meniscus lens, a second biconvex lens, a third cemented lens, an eighth meniscus lens, and a fourth biconvex lens. Optionally, the total length of the projection lens is less than 390mm, and the diameter of the largest lens in the projection lens is less than 51mm. Optionally, the diameter range of the exit pupil of the projection lens is 1-5 mm. Optionally, the projector further includes a polarizer and/or a neutral filter, and the polarizer and/or the neutral filter is disposed between the light-gathering module and the graphics card module or between the graphics card module and the projection lens. The embodiment of the invention has the beneficial effects that the projector for AR optical waveguide testing in the embodiment comprises the light source module, the light condensing module, the image card module and the projection lens, wherein light emitted by the light source module is converted into light with a preset caliber and a preset numerical aperture through the light condensing module, the light passes through the projection pattern provided by the image card module, the projection lens converts images of the projection pattern into emergent light with different angles, and the emergent light with all angles is converged to the position of an exit pupil, so that test light with high brightness, high definition, high uniformity, high contrast and large field angle is formed, and the image quality close to the diffraction limit is provided. Drawings FIG. 1 is a schematic diagram of an optical waveguide test system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a projector for AR optical waveguide testing according to an embodiment of the present invention; FIG. 3 is a schematic diagram of another embodiment of a projector for AR optical waveguide testing; Fig. 4 is a schematic structural diagram of a condensing module and a projection