CN115586654A - AR resin lens and preparation method thereof - Google Patents
AR resin lens and preparation method thereof Download PDFInfo
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- CN115586654A CN115586654A CN202211235055.1A CN202211235055A CN115586654A CN 115586654 A CN115586654 A CN 115586654A CN 202211235055 A CN202211235055 A CN 202211235055A CN 115586654 A CN115586654 A CN 115586654A
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- 239000011347 resin Substances 0.000 title claims abstract description 42
- 229920005989 resin Polymers 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000758 substrate Substances 0.000 claims abstract description 94
- 239000011521 glass Substances 0.000 claims abstract description 28
- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000004438 eyesight Effects 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000005266 casting Methods 0.000 claims description 14
- 229920002120 photoresistant polymer Polymers 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 3
- 241001391944 Commicarpus scandens Species 0.000 abstract description 2
- 230000003190 augmentative effect Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005323 electroforming Methods 0.000 description 1
- 230000004424 eye movement Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000001259 photo etching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004984 smart glass Substances 0.000 description 1
- 238000010023 transfer printing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/44—Grating systems; Zone plate systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1861—Reflection gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B2027/0178—Eyeglass type
Abstract
The invention discloses an AR resin lens and a preparation method thereof, wherein the AR resin lens comprises a shell and a waveguide substrate wrapped by the shell, the waveguide substrate is integrally provided with a grating structure, and the grating structure is provided with a coupling-in area and a coupling-out area; the shell and the waveguide substrate are both made of optical resin materials, the refractive index of the waveguide substrate is 1.74, the refractive index of the shell is lower than that of the waveguide substrate, and the shell has the upper surface and lower surface curvature difference with the vision correcting function. The resin optical material is adopted, so that the density is small, the weight is light, the wearing comfort is good, the resin optical material is not easy to break when falling, the safety is high, the production cost is low, and the resin optical material has the function of correcting the eyesight; the method not only solves the problem that the grating structure is not easy to form on other materials, but also solves the problem that the grating structure is difficult to cast and mold by directly using glass materials, and the obtained waveguide substrate has good mechanical reliability, small density, light weight and good wearing comfort.
Description
Technical Field
The invention belongs to the technical field of AR (augmented reality) glasses, and particularly relates to an AR resin lens and a preparation method thereof.
Background
In recent years, the augmented reality technology has wide application prospects in the fields of education, security protection, health management, virtual training, medical research, electronic games and the like. In order to meet such a demand, a near-eye display device serving an augmented reality technology needs to be able to ensure that light of the real world can be captured by human eyes directly passing through the device on the basis of achieving a good virtual image display effect. This requires that the near-eye display device should satisfy various display performance criteria including a larger field angle, a good uniformity of field of view, a larger eye movement range, and a higher display resolution, etc. In addition, in consideration of the use demand that users can wear, the near-eye display device must also satisfy the characteristics of light weight, miniaturization, and glasses-like form. However, the above requirements are often in practical designs, and are often in conflict with each other, and thus the design and manufacture of enhanced display glasses with excellent performance still have great challenges.
The existing diffraction light waveguide of the surface relief grating is generally manufactured on a glass substrate, and the manufacturing process comprises the following steps: the grating structure is formed by pre-manufacturing a grating template, then coating imprinting glue on a glass substrate, and utilizing the grating template to enable the imprinting glue to form a grating structure through a nano-imprinting process. But the glass substrate has higher density, so the wearing weight is heavy and the user experience is not friendly; and since glass is brittle and the mechanical reliability of the glass substrate optical waveguide is poor, it is very brittle when dropped and there is a risk that the glass is broken into sharp glass fragments.
Disclosure of Invention
The invention aims to overcome the defects and provides an AR resin lens and a preparation method thereof, wherein the AR resin lens has the function of correcting eyesight, can reduce the weight of an optical waveguide lens and improves the wearing comfort of AR glasses.
In order to realize the purpose, the invention is realized by the following technical scheme:
in a first aspect, the invention provides an AR resin lens, which includes a housing and a waveguide substrate wrapped by the housing, wherein a grating structure is integrally arranged on the waveguide substrate, and the grating structure has a coupling-in area and a coupling-out area; the shell and the waveguide substrate are both made of optical resin materials, the refractive index of the waveguide substrate is 1.74, the refractive index of the shell is lower than that of the waveguide substrate, and the shell has the upper surface and lower surface curvature difference with the vision correcting function.
Furthermore, the refractive index of the shell is 1.5-1.67, and the refractive index of the internal waveguide substrate is higher than that of the shell, so that the total reflection condition is met, and the AR intelligent glasses are suitable for AR intelligent glasses.
Further, the material of the shell can adopt optical materials commonly used in the field, and can be at least one selected from CR-39, acrylate and polyurethane, and the visible light transmittance is not lower than 88%.
Further, the grating structure is arranged on the surface of the waveguide substrate in a protruding mode, and the grating structure comprises a plurality of sub-structures which are identical in shape and parallel to each other.
Further, the grating structure may be one of a binary grating, a slanted grating, a blazed grating, or a two-dimensional grating. Generally, a valley structure exists between sub-structures of a binary grating, a certain included angle (for example, an included angle of 10 ° to 90 °) exists between a sub-structure of an inclined grating and a substrate, a cross section of a sub-structure of a blazed grating is a sawtooth shape, and a two-dimensional grating refers to a grating structure having periodic sub-structures in two orthogonal directions (for example, X axis and Y axis).
Further, the period of the grating structure is 150nm to 900nm, preferably 300nm to 800nm, and for example, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, or the like; the depth of the grating structure is not more than 400nm, preferably not more than 280nm, and may be, for example, 250nm, 200nm, 100nm, 50nm, 10nm, 1nm, or the like.
Further, the thickness of the resin lens is 1mm to 20mm, for example, 1mm, 1.5mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., preferably 1mm to 5mm.
In a second aspect, the present invention further provides a method for preparing a waveguide substrate according to the first aspect, including the steps of:
forming a grating structure on a first substrate to obtain a first template;
transferring the grating structure of the first template to a second substrate to obtain a second template with a structure complementary to the grating structure;
combining the second template and the first structural member to form a casting mold, and injecting an optical resin raw material with the refractive index of 1.74 into a mold cavity of the casting mold;
and curing and demolding to obtain the waveguide substrate.
Further, the method for forming the grating structure on the first substrate includes coating photoresist on the first substrate, and performing exposure and development to form the grating structure.
Further, the thickness variation of the first substrate and/or the second substrate is not more than 40 μm, and the surface roughness of the first substrate and/or the second substrate is not more than 4nm.
Furthermore, the first template is made of glass, and the second template is made of metal.
Further, the second template is detachably connected with the first structural member and encloses the die cavity; and a pouring hole communicated to the mold cavity is formed in the edge of the first structural member.
In a third aspect, the present invention also provides a method for preparing the AR resin lens of the first aspect, comprising the steps of:
fixing the waveguide substrate prepared by the preparation method of the second aspect in a glass mold for preparing a resin lens,
after die assembly, casting a shell raw material;
and (5) demolding after curing and forming to obtain the product.
Further, the glass mold has upper and lower surface curvature differences of vision correction function, so that the upper and lower surface curvature differences of the prepared AR resin lens meet various degrees of vision correction. Different shapes can also be formed by laser cutting as desired.
Further, the waveguide substrate is fixed in a glass mold through a rubber ring.
Further, when the waveguide substrate is fixed in the glass mold, the grating structure is positioned on the side of the waveguide substrate away from the eyes.
Compared with the prior art, the invention has the following beneficial effects:
the AR resin lens meets the condition of total reflection through the preparation of the refractive indexes of the shell and the waveguide substrate, and is suitable for AR intelligent glasses; the resin optical material is adopted, so that the density is small, the weight is light, the wearing comfort is good, the resin optical material is not easy to break when falling, the safety is high, the production cost is low, and the resin optical material has the function of correcting the eyesight;
according to the preparation method of the waveguide substrate, the problem that the grating structure is not easy to form on other materials is solved through transfer printing of the first substrate and the second substrate, the problem that the grating structure is difficult to cast and mold by directly forming the grating structure by using a glass material is solved, and the waveguide substrate obtained by adopting the method of casting resin curing and molding is good in mechanical reliability, small in density, light in weight and good in wearing comfort.
Drawings
Fig. 1 is a schematic structural view of an AR resin lens provided in example 1;
FIG. 2 is a schematic view showing the use state of the AR resin lens of example 1;
fig. 3 is a schematic top view of the waveguide substrate according to embodiment 1;
fig. 4 is a schematic perspective view of a waveguide substrate according to embodiment 1;
fig. 5 is a schematic structural view of a casting mold for a waveguide substrate according to embodiment 2;
fig. 6 is a sectional view of clamping the glass mold described in example 3.
In the figure: 1-shell, 2-waveguide substrate, 21-grating structure, 22-coupling-in region, 23-coupling-out region, 3-first member, 4-second template, 5-pouring hole, 6-upper die, 7-lower die, 8-rubber ring.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and specific examples. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Example 1
An AR resin lens as shown in fig. 1 to 3 comprises a housing 1 and a waveguide substrate 2 wrapped by the housing, wherein a grating structure 21 is integrally arranged on the waveguide substrate 2, and the grating structure 21 has a coupling-in area 22 and a coupling-out area 23; the shell 1 and the waveguide substrate 2 are both made of optical resin, the refractive index of the waveguide substrate 2 is 1.74, the refractive index of the shell 1 is lower than that of the waveguide substrate 2, and the shell 1 has the upper surface and lower surface curvature difference with the vision correcting function.
In this embodiment, the refractive index of the housing 1 is 1.5 to 1.67, and the refractive index of the internal waveguide substrate 2 is higher than that of the housing, so as to satisfy the condition of total reflection, and thus the AR smart glasses are suitable for use. The material of the shell 1 can adopt optical materials commonly used in the field, and can be at least one selected from CR-39, acrylate and polyurethane, and the visible light transmittance is not lower than 88%.
As shown in fig. 4, the grating structure 21 of the present embodiment is protrusively disposed on the surface of the waveguide substrate 2, and the grating structure 21 includes a plurality of sub-structures with the same shape and parallel to each other, and is generally disposed on a side of the waveguide substrate 2 away from the eye, as shown in fig. 2 when in use.
The specific structure of the grating structure 21 is not particularly limited, and in some embodiments of the present invention, the grating structure 21 may be one of a binary grating, a tilted grating, a blazed grating, or a two-dimensional grating. Generally, a valley structure exists between sub-structures of a binary grating, a certain included angle (for example, an included angle of 10 ° to 90 °) exists between a sub-structure of an inclined grating and a substrate, a cross section of a sub-structure of a blazed grating is a sawtooth shape, and a two-dimensional grating refers to a grating structure having periodic sub-structures in two orthogonal directions (for example, X axis and Y axis).
In some embodiments of the present invention, the period of the grating structure 21 may be 300nm to 800nm, for example, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, etc.; the depth of the grating structure 21 is not more than 280nm, and may be, for example, 250nm, 200nm, 100nm, 50nm, 10nm, 1nm, or the like.
In some embodiments of the invention, the thickness of the resin lens is 1mm to 20mm, such as 1mm, 1.5mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc., preferably 1mm to 5mm.
Example 2
The present embodiment provides a method for manufacturing a waveguide substrate according to embodiment 1, including the following steps:
forming a grating structure on a first substrate to obtain a first template;
transferring the grating structure of the first template onto a second substrate to obtain a second template 4 with a structure complementary to the grating structure;
combining the second template 4 and the first structural member 3 to form a casting mold, and injecting an optical resin raw material with the refractive index of 1.74 into a mold cavity of the casting mold;
and curing and demolding to obtain the waveguide substrate.
In this embodiment, a specific method for forming a grating structure on a first substrate includes coating a photoresist on the first substrate, and performing exposure and development to form the grating structure. The first substrate is previously cleaned. It should be noted that the specific operating conditions, parameters, and the like for forming the grating structure are not particularly limited, and may be determined according to the actually required grating structure.
In this embodiment, the grating structure of the first template is transferred to the second substrate by an electroforming process, and the grating structure is transferred to the second substrate, so that a complementary structure with the original grating structure on the first substrate is obtained on the second substrate, and then the second template 4 is used for casting molding, so as to obtain the waveguide substrate with the original grating structure.
In order to further improve the flatness of the surface of the prepared waveguide substrate and improve the optical performance of the whole AR lens, the thickness variation of the first substrate and/or the second substrate is not more than 40 μm, and the surface roughness of the first substrate and/or the second substrate is not more than 4nm. By controlling the first substrate and/or the second substrate to meet the above conditions, the prepared waveguide substrate has better surface flatness.
In this embodiment, the first substrate is made of glass, and the second substrate is made of metal. Because the grating structure is easily formed on the surface of the glass substrate by photoetching, but considering that the first substrate is composed of glass and photoresist, and the photoresist is not high-temperature resistant and is easy to damage and is difficult to meet the casting and curing requirements, the complementary structure of the grating structure is transferred to the metal substrate, so that the optical waveguide lens product with the original grating structure can be obtained by subsequent casting.
In this embodiment, the second mold plate 4 and the first structural member 3 are detachably connected and enclose the mold cavity; the edge of the first structural member 3 is provided with a pouring hole 5 communicated to the mold cavity.
Example 3
The present embodiment provides a method for preparing an AR resin lens as described in embodiment 1, including the following steps:
the waveguide substrate 2 prepared in example 2 is fixed in a glass mold for preparing a resin lens by a rubber ring 8 so that the grating structure 21 is positioned at a side of the waveguide substrate 2 away from the eyes, as shown in fig. 6, an upper mold 6 and a lower mold 7 of the glass mold have a curvature difference for correcting a vision function,
after die assembly, casting a shell raw material;
demolding after curing and molding;
and (5) opening the die, cleaning, and cutting by laser to obtain the required shape.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and technical principles of the described embodiments, and such modifications and variations should also be considered as within the scope of the present invention.
Claims (12)
1. An AR resin lens is characterized by comprising a shell and a waveguide substrate wrapped by the shell, wherein a grating structure is integrally arranged on the waveguide substrate, and the grating structure is provided with a coupling-in area and a coupling-out area; the shell and the waveguide substrate are both made of optical resin materials, the refractive index of the waveguide substrate is 1.74, the refractive index of the shell is lower than that of the waveguide substrate, and the shell has the upper surface curvature difference and the lower surface curvature difference with the eyesight correcting function.
2. The AR resin lens of claim 1, wherein the refractive index of the outer shell is 1.5 to 1.67.
3. The AR resin lens of claim 1, wherein the grating structure is protrudingly disposed on the surface of the waveguide substrate, the grating structure comprising a plurality of sub-structures having the same shape and being parallel to each other.
4. The AR resin lens according to claim 1, wherein the grating structure is one of a binary grating, a tilted grating, a blazed grating, or a two-dimensional grating.
5. The AR resin lens of claim 1, wherein the period of the grating structure is 150nm to 900nm, and the depth of the grating structure is not greater than 400nm.
6. The AR resin lens according to claim 1, wherein the resin lens has a thickness of 1mm to 20mm.
7. A method for manufacturing a waveguide substrate according to any one of claims 1 to 6, comprising the steps of:
forming a grating structure on a first substrate to obtain a first template;
transferring the grating structure of the first template onto a second substrate to obtain a second template with a structure complementary to the grating structure;
combining the second template and the first structural member to form a casting mold, and injecting an optical resin raw material with the refractive index of 1.74 into a mold cavity of the casting mold;
and curing and demolding to obtain the waveguide substrate.
8. The method of claim 7, wherein the grating structure is formed on the first substrate by coating a photoresist on the first substrate, exposing and developing the photoresist to form the grating structure.
9. The method according to claim 7, wherein a thickness variation of the first substrate and/or the second substrate is not more than 40 μm, and a surface roughness of the first substrate and/or the second substrate is not more than 4nm.
10. The method according to claim 7, wherein the first template is made of glass and the second template is made of metal.
11. The method according to claim 7, wherein the second mold plate is detachably connected to the first structural member and encloses the cavity; and a pouring hole communicated to the mold cavity is formed in the edge of the first structural member.
12. A method for preparing the AR resin lens of any one of claims 1 to 6, comprising the steps of:
fixing the waveguide substrate produced by the production method according to any one of claims 7 to 11 in a glass mold for producing a resin lens,
after die assembly, casting a shell raw material;
and (5) demolding after curing and forming to obtain the product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211235055.1A CN115586654A (en) | 2022-10-10 | 2022-10-10 | AR resin lens and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211235055.1A CN115586654A (en) | 2022-10-10 | 2022-10-10 | AR resin lens and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115586654A true CN115586654A (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211235055.1A Pending CN115586654A (en) | 2022-10-10 | 2022-10-10 | AR resin lens and preparation method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN115586654A (en) |
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2022
- 2022-10-10 CN CN202211235055.1A patent/CN115586654A/en active Pending
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