Tool for testing optical performance of waveguide finished product

Abstract

The utility model provides a waveguide finished product optical performance test fixture, which comprises a supporting assembly and a fixing plate, the inner side edge position of the fixing plate is connected with the outer side edge position of the supporting assembly, a clamping hole is arranged in the fixing plate to be clamped with the outline side wall of a waveguide finished product, and an optical machine module fixing hole and a test hole are arranged in the supporting assembly. An optical machine module is arranged in the optical machine module fixing hole, the test hole is used for carrying out optical performance detection on an out-coupling grating area of a waveguide finished product, and the supporting assembly can carry out positioning and supporting on local positions of the waveguide finished products with different outlines, so that the optical performance test efficiency of the waveguide finished product can be greatly reduced. And the optical performance test cost of the waveguide finished product is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of AR diffraction optical waveguides, and in particular relates to a fixture for testing the optical performance of a finished waveguide product. Background Art

[0002] With the development of information technology, augmented reality (AR) technology has become increasingly mature and is being used more and more widely in education, medical care, entertainment, industry and other industries.

[0003] Augmented reality technology can be implemented through a variety of hardware platforms, the most immersive of which is wearable augmented reality devices, namely AR glasses. Currently, the more mature AR glasses technology solutions are mainly divided into prism solutions, birdbath solutions, free-form surface solutions, off-axis holographic lens solutions, and diffractive waveguide solutions. Depending on the grating type, diffractive waveguides can be divided into two categories: surface relief grating waveguides and volume holographic grating waveguides.

[0004] Taking a surface relief grating waveguide as an example, the preparation process of the prior art is generally as follows:

[0005] 1. Prepare an imprint master with a preset grating structure.

[0006] 2. The grating structure of the imprint master is transferred to the soft film through the nanoimprint process to obtain the inverse structure of the grating structure on the soft film.

[0007] Specifically, the embossing glue is evenly spin-coated on the embossing master, the soft film substrate is bonded to the embossing master, and pressure is applied to fill the embossing glue into the grating structure of the embossing master, and the inverse structure of the grating structure is obtained on the embossing glue. The embossing glue with the inverse structure of the grating structure is transferred to the soft film substrate by ultraviolet light curing and demolding, thereby obtaining a soft film with the inverse structure of the grating structure.

[0008] 3. The inverse structure of the grating structure on the soft film is transferred to the glass wafer through the nanoimprint process to obtain a glass wafer with a grating structure, thereby obtaining a surface relief grating waveguide.

[0009] Specifically, a tackifier and product glue are spin-coated on a glass wafer in sequence, a soft film with a grating structure inverse structure is bonded to the product glue on the glass wafer, pressure is applied to fill the product glue into the grating structure inverse structure of the soft film, a grating structure is obtained on the product glue, and ultraviolet light curing and demolding are used to separate the soft film with a grating structure inverse structure from the product glue with a grating structure to obtain a glass wafer with a grating structure, thereby obtaining a finished waveguide product - a surface relief grating waveguide.

[0010] In order to ensure that the optical performance of the finished waveguide product meets the set requirements, the finished waveguide product needs to be placed on a corresponding fixture, and then an optical performance testing device is used to perform an optical performance test on the finished waveguide product placed on the fixture.

[0011] However, since different types of existing waveguide products have different external profiles, corresponding fixtures need to be developed for the existing waveguide products with different external profiles, which greatly reduces the efficiency of optical performance testing of the waveguide products and increases the cost of optical performance testing of the waveguide products. Utility Model Content

[0012] In order to overcome the defects of the prior art, the utility model provides a jig for testing the optical performance of a finished waveguide product.

[0013] The utility model is achieved through the following technical solutions:

[0014] The utility model provides a fixture for testing the optical performance of a finished waveguide product, comprising a supporting component and a fixing plate;

[0015] The inner edge of the fixing plate is connected to the outer edge of the supporting assembly;

[0016] A clamping hole is provided in the fixing plate, and the clamping hole is clamped with the contour side wall of the finished waveguide product;

[0017] An optical-mechanical module fixing hole and a test hole are provided in the support assembly; an optical-mechanical module is provided in the optical-mechanical module fixing hole, and the test hole is used to perform optical performance testing on the outcoupling grating area of ​​the finished waveguide product;

[0018] The support assembly can position and support local positions of waveguide products with different profiles.

[0019] Furthermore, the support assembly includes a base plate and a support plate;

[0020] The inner edge of the support plate is connected to the outer edge of the bottom plate, and the outer side of the bottom plate is the side of the bottom plate away from the optical performance testing equipment;

[0021] The outer edge of the support plate is connected to the inner edge of the fixing plate;

[0022] The support plate is provided with a positioning support portion, which can position and support a local position of a finished waveguide product with different outer contours.

[0023] Furthermore, a first through hole and a second through hole are formed inside the bottom plate, and a third through hole and a fourth through hole are formed inside the support plate;

[0024] The first through hole is connected to the third through hole to form the test hole, and the second through hole is connected to the fourth through hole to form the optical-mechanical module fixing hole.

[0025] Furthermore, the support plate is provided with a plurality of positioning support portions at intervals around the third through hole, and the plurality of positioning support portions position and support local positions of the finished waveguide products with different outer contours.

[0026] Furthermore, a side wall of the third through hole extends toward the interior of the third through hole to form a first positioning support portion;

[0027] A support rod is provided inside the third through hole, and the support rod can be provided in different areas inside the third through hole, and the contact surface between the support rod and the finished waveguide forms a second positioning support portion;

[0028] The first positioning support portion and the second positioning support portion realize positioning support for local positions of finished waveguide products with different outer contours.

[0029] Furthermore, the support plate is provided with a plurality of connection holes at intervals around the edge of the third through hole;

[0030] The ends of the support rods are detachably connected to the connection holes at different positions, so that the support rods can be arranged in different areas inside the third through hole.

[0031] Furthermore, the optical-mechanical module includes an optical machine, a cover plate, and a positioning plate;

[0032] An optical machine positioning hole is provided in the positioning plate;

[0033] The cover plate is connected to the positioning plate, and the light output port of the optical machine is clamped into the optical machine positioning hole;

[0034] The cover plate is connected to the support assembly, and the positioning plate is set in the optical machine module fixing hole, so that the output light of the optical machine can pass through the optical machine module fixing hole and be projected onto the coupling grating area of ​​the waveguide finished product.

[0035] Furthermore, it also includes a protection chamber;

[0036] The protection compartment is connected to the outer bottom edge of the fixing plate.

[0037] Furthermore, a vent hole is provided in the positioning support portion;

[0038] The vent hole is connected to the vacuum pump through an air suction pipe.

[0039] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0040] The utility model provides a fixture for testing the optical performance of a finished waveguide product, comprising a support assembly and a fixing plate. The inner edge of the fixing plate is connected to the outer edge of the support assembly. A snap-in hole is provided in the fixing plate to snap-in with the contour side wall of the finished waveguide product. The support assembly is provided with an optical-mechanical module fixing hole and a test hole. The support assembly can position and support local positions of finished waveguide products with different external contours, thereby greatly reducing the efficiency of optical performance testing of finished waveguide products and improving the cost of optical performance testing of finished waveguide products. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0042] Figure 1 This is a schematic diagram of the overall structure of the optical performance testing fixture for finished waveguide products of the first example of the present utility model at a first angle;

[0043] Figure 2 This is a schematic diagram of the overall structure of the optical performance testing fixture for finished waveguide products according to the first example of the present utility model at a second angle;

[0044] Figure 3 This is a schematic structural diagram of a waveguide finished product optical performance test fixture placed on a waveguide finished product according to the first example of the present utility model;

[0045] Figure 4 is a structural diagram of the fixed plate;

[0046] Figure 5 is a structural diagram of the base plate;

[0047] Figure 6 Schematic diagram of the structure of the support plate;

[0048] Figure 7 Schematic diagram of the structure of the support rod;

[0049] Figure 8 Schematic diagram of the overall structure of the optical-mechanical module;

[0050] Figure 9 This is the structural explosion diagram of the optical-mechanical module;

[0051] Figure 10 This is a schematic diagram of the overall structure of a fixture for testing the optical performance of a finished waveguide product according to the second example of the present utility model;

[0052] Figure 11 This is a structural diagram of the protection chamber.

[0053] Among them, 1-fixing plate, 2-clamping hole, 3-waveguide finished product, 4-bottom plate, 5-support plate, 6-fixing hole, 7-first through hole, 8-second through hole, 9-third through hole, 10-fourth through hole, 11-first positioning support part, 12-support rod, 13-first connecting hole, 14-second connecting hole, 15-second positioning support part, 16-optical machine, 17-cover plate, 18-positioning plate, 19-optical machine positioning hole, 20-protective compartment, 21-first ventilation hole, 22-second ventilation hole. DETAILED DESCRIPTION

[0054] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0055] In this document, the terms "first", "second" and other similar words are not intended to imply any order, quantity and importance, but are merely used to distinguish different elements. In this document, the terms "one", "an" and other similar words are not intended to indicate that there is only one of the things described, but rather that the relevant description is only for one of the things described, and the things described may have one or more. In this document, the terms "comprise", "include" and other similar words are intended to indicate logical relationships, and cannot be regarded as indicating relationships in spatial structure. For example, "A includes B" is intended to indicate that B logically belongs to A, and does not mean that B is spatially located inside A. In addition, the meanings of the terms "comprise", "include" and other similar words should be regarded as open, not closed. For example, "A includes B" is intended to indicate that B belongs to A, but B does not necessarily constitute the whole of A, and A may also include other elements such as C, D, and E.

[0056] In this document, the terms "embodiment," "present embodiment," "preferred embodiment," and "one embodiment" do not imply that the description applies only to a specific embodiment, but rather that the description may also apply to one or more other embodiments. Those skilled in the art should understand that any description of a particular embodiment herein may be substituted, combined, or otherwise combined with the description of one or more other embodiments. New embodiments resulting from such substitution, combination, or other combination are readily conceivable by those skilled in the art and fall within the scope of protection of this utility model.

[0057] In the description herein, “a plurality of” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0058] like Figure 1-Figure 2 As shown, the utility model provides a waveguide finished product optical performance test fixture, including a support component and a fixing plate 1.

[0059] The inner edge of the fixing plate 1 is connected to the outer edge of the supporting assembly, and a clamping hole 2 is provided inside the fixing plate 1 (such as Figure 4 As shown), the snap-in hole 2 corresponds to the outer contour of the waveguide product, and the snap-in hole in the fixing plate 1 snaps in with the contour side wall of the waveguide product 3 (as shown Figure 3 shown).

[0060] The support assembly is provided with an optomechanical module fixing hole and a test hole. The optomechanical module is installed in the optomechanical module fixing hole, and the test hole is used to test the optical performance of the outcoupling grating area of ​​the finished waveguide product. The test hole is connected to the clamping hole.

[0061] The supporting component can position and support the local position of the waveguide finished product with different outer contours.

[0062] Illustratively, the support assembly may include a base plate 4 and a support plate 5 .

[0063] The inner edge of the support plate 5 is connected to the outer edge of the bottom plate 4, and the outer edge of the support plate 5 is connected to the inner edge of the fixing plate 1. For example, the bottom plate, the support plate and the fixing plate can be provided with fixing holes 6 at the edge of the plate surface (such as Figure 4-Figure 6 As shown in FIG, the bottom plate, the support plate, and the fixing plate are connected together through the fixing holes using bolts, nuts, and other connectors. The outer side of the bottom plate is the side of the bottom plate away from the optical performance test equipment.

[0064] The bottom plate 4 has a first through hole 7 and a second through hole 8 (such as Figure 5 As shown), a third through hole 9 and a fourth through hole 10 are provided inside the support plate 5 (as shown Figure 6 The first through hole 7 is connected to the third through hole 9 to form the above-mentioned test hole, and the second through hole 8 is connected to the fourth through hole 10 to form the above-mentioned optical-mechanical module fixing hole.

[0065] The aperture size of the third through hole is preferably smaller than the aperture size of the first through hole. The aperture size of the fourth through hole can be comparable to the aperture size of the second through hole.

[0066] There is no specific limitation on the shapes of the first through hole, the second through hole, the third through hole and the fourth through hole. As shown in the figure, the shapes of the first through hole, the second through hole, the third through hole and the fourth through hole are close to rectangles.

[0067] The support plate is provided with positioning support portions, which are capable of positioning and supporting local locations of finished waveguides having different profiles. For example, the support plate may be provided with multiple positioning support portions spaced apart around the third through hole, and these positioning support portions may provide positioning and support for local locations of finished waveguides having different profiles. It should be noted that the local locations of the finished waveguide here refer to local locations within the waveguide substrate region of the finished waveguide, excluding the incoupling grating region and the outcoupling grating region.

[0068] In a more specific example, the positioning support portion may include a first positioning support portion and a second positioning support portion.

[0069] For example, the support plate extends from one side wall of the third through hole toward the inside of the third through hole to form a first positioning support portion. Figure 6 As shown, the support plate 5 extends toward the inside of the third through hole 9 on a side wall of the third through hole 9 close to the fourth through hole 10 to form a first positioning support portion 11 .

[0070] The support plate is provided with a support rod inside the third through hole, and the support rod can be provided in different areas inside the third through hole. Specifically, the support plate is provided with a plurality of connection holes at intervals around the edge of the third through hole, and the ends of the support rod are detachably connected to the connection holes at different positions, so that the support rod can be provided in different areas inside the third through hole. Figure 6 As shown, the support plate 5 is provided with a plurality of first connection holes 13 at intervals on the edge position near the top end of the third through hole 9, and the support plate 5 is provided with a plurality of second connection holes 14 at intervals on the edge position near the bottom end of the third through hole 9. The two ends of the support rod are detachably connected to the first connection holes and the second connection holes at different positions, respectively, so that the support rod can be set in different areas inside the third through hole.

[0071] The contact surface between the support rod 12 and the finished waveguide forms a second positioning support portion 15 (eg Figure 7 shown).

[0072] The first positioning support portion and the second positioning support portion are used to position and support the local positions of the finished waveguide products with different outer contours.

[0073] For example, Figure 8-Figure 9 As shown, the optical engine module may include an optical engine 16, a cover plate 17, and a positioning plate 18. The optical engine 16 has a light emitting port, and the positioning plate 18 is provided with an optical engine positioning hole 19.

[0074] The cover plate 17 is connected to the positioning plate 18. For example, the cover plate 17 and the positioning plate 18 are respectively provided with fixing holes 6 (such as Figure 9 As shown), bolts, nuts and other connectors are used to connect the cover plate and the positioning plate through the fixing holes, so that the light output port of the optical machine is clamped in the optical machine positioning hole.

[0075] The cover is connected to the support assembly. For example, taking the support assembly including the above-mentioned base plate and support plate as an example, a fixing hole 6 is provided at the edge of the inner side of the base plate 4 near the second through hole 8 (such as Figure 5 As shown), the cover plate 17 is provided with a fixing hole 6 (as shown Figure 8 As shown in the figure, bolts, nuts and other connectors are used to connect the bottom plate and the cover plate through the fixing holes, so that the positioning plate is set in the fixing hole of the optical machine module, so that the outgoing light of the optical machine can be emitted through the light exit port and then pass through the optical machine positioning hole located in the fixing hole of the optical machine module to be projected onto the coupling grating area of ​​the finished waveguide product.

[0076] The utility model provides a jig for testing the optical performance of finished waveguide products. The support assembly can provide local positioning and support for finished waveguide products with different profiles. It only requires changing the morphological features of the clamping holes in the fixing plate according to the profile of the finished waveguide products, thereby greatly reducing the efficiency of testing the optical performance of finished waveguide products and improving the cost of testing the optical performance of finished waveguide products.

[0077] As a preferred embodiment, the optical performance test fixture for finished waveguide products of the present invention can also be provided with a protective chamber 20 (such as Figure 11 As shown), the protection compartment 20 is connected to the outer bottom edge of the fixed plate 1 (as shown Figure 10 As shown in the figure, during the optical performance test of the finished waveguide product set on the finished waveguide product optical performance test fixture, the protective chamber can catch the finished waveguide product that accidentally falls from the outside of the fixing plate to prevent the finished waveguide product from falling to the ground and breaking.

[0078] As a further preferred embodiment, a vent hole can be provided in the positioning support portion of the support plate, and the vent hole is connected to the vacuum pump through an air suction pipe. Taking the above support plate as an example of a first support portion and a second support portion, a first vent hole 21 (such as Figure 6 As shown), a second vent hole 22 is provided on the second support portion (as shown Figure 7 As shown, the first vent hole 21 is connected to a vacuum pump via a first suction pipe, and the second vent hole 22 is connected to a vacuum pump via a second suction pipe. Thus, during optical performance testing of a finished waveguide placed on the finished waveguide optical performance testing jig, vacuum adsorption securely secures the finished waveguide to the jig, preventing it from accidentally falling off.

[0079] The process of using the optical performance test fixture of the finished waveguide product of the present invention to test the optical performance of the finished waveguide product is as follows:

[0080] 1. Assemble the optical performance test fixture of the finished waveguide product according to the above assembly relationship.

[0081] Taking the positioning support portion of the support plate including the first positioning support portion and the second positioning support portion as an example, the position relationship of the support rod in the third through hole of the support plate is positioned and set according to the outer contour of the finished waveguide to be tested.

[0082] 2. Fix the finished waveguide optical performance test fixture to the front end of the optical performance test equipment, with the inner side of the bottom plate close to the front end of the optical performance test equipment.

[0083] 3. Place the finished waveguide to be tested in the snap-in hole in the fixing plate so that the snap-in hole in the fixing plate snaps onto the contour side wall of the finished waveguide to be tested.

[0084] 4. Start the optical machine. The outgoing light of the optical machine is projected onto the coupling-in grating area of ​​the waveguide product to be tested. The light is received by the coupling-in grating area of ​​the waveguide product to be tested and propagates through total internal reflection from the waveguide substrate of the waveguide product to be tested to reach the outcoupling grating area of ​​the waveguide product to be tested. The outcoupling light from the outcoupling grating area of ​​the waveguide product to be tested is received by the optical performance test equipment and the test results are output.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field can still modify or replace the specific implementation methods of the present invention. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the claims of the present invention to be approved.

Claims

1. A fixture for testing the optical performance of a finished waveguide product, characterized in that: including a support assembly and a fixing plate; The inner edge of the fixing plate is connected to the outer edge of the supporting assembly; A clamping hole is provided in the fixing plate, and the clamping hole is clamped with the contour side wall of the finished waveguide product; An optical-mechanical module fixing hole and a test hole are provided in the support assembly. The optical-mechanical module is provided in the optical-mechanical module fixing hole. The test hole is used to perform optical performance testing on the outcoupling grating area of ​​the finished waveguide product. The support assembly can position and support local positions of waveguide products with different profiles.

2. The optical performance test fixture for finished waveguide products according to claim 1, characterized in that: The support assembly includes a base plate and a support plate; The inner edge of the support plate is connected to the outer edge of the bottom plate, and the outer side of the bottom plate is the side of the bottom plate away from the optical performance testing equipment; The outer edge of the support plate is connected to the inner edge of the fixing plate; The support plate is provided with a positioning support portion, which can position and support a local position of a finished waveguide product with different outer contours.

3. The optical performance test fixture for finished waveguide products according to claim 2, characterized in that: A first through hole and a second through hole are defined in the bottom plate, and a third through hole and a fourth through hole are defined in the support plate. The first through hole is connected to the third through hole to form the test hole, and the second through hole is connected to the fourth through hole to form the optical-mechanical module fixing hole.

4. The optical performance test fixture for finished waveguide products according to claim 3, characterized in that: The support plate is provided with a plurality of positioning support parts at intervals around the third through hole, and the plurality of positioning support parts position and support local positions of the finished waveguide products with different outer contours.

5. The optical performance test fixture for finished waveguide products according to claim 4, characterized in that: One side wall of the third through hole extends toward the inside of the third through hole to form a first positioning support portion; A support rod is provided inside the third through hole, and the support rod can be provided in different areas inside the third through hole, and the contact surface between the support rod and the finished waveguide forms a second positioning support portion; The first positioning support portion and the second positioning support portion realize positioning support for local positions of finished waveguide products with different outer contours.

6. The optical performance test fixture for finished waveguide products according to claim 5, characterized in that: The support plate is provided with a plurality of connection holes at intervals at edge positions surrounding the third through hole; The ends of the support rods are detachably connected to the connection holes at different positions, so that the support rods can be arranged in different areas inside the third through hole.

7. The optical performance test fixture for finished waveguide products according to claim 1, characterized in that: The optical-mechanical module includes an optical machine, a cover plate, and a positioning plate; An optical machine positioning hole is provided in the positioning plate; The cover plate is connected to the positioning plate, and the light output port of the optical machine is clamped into the optical machine positioning hole; The cover plate is connected to the support assembly, and the positioning plate is set in the optical machine module fixing hole, so that the output light of the optical machine can pass through the optical machine module fixing hole and be projected onto the coupling grating area of ​​the waveguide finished product.

8. The optical performance test fixture for finished waveguide products according to claim 1, characterized in that: Also includes a protective compartment; The protection compartment is connected to the outer bottom edge of the fixing plate.

9. The optical performance test fixture for finished waveguide products according to claim 2, characterized in that: A vent hole is provided in the positioning support portion; The vent hole is connected to the vacuum pump through an air suction pipe.

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