CN111458778B - Grating preparation method and grating - Google Patents
Grating preparation method and grating Download PDFInfo
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- CN111458778B CN111458778B CN202010482584.6A CN202010482584A CN111458778B CN 111458778 B CN111458778 B CN 111458778B CN 202010482584 A CN202010482584 A CN 202010482584A CN 111458778 B CN111458778 B CN 111458778B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1847—Manufacturing methods
- G02B5/1852—Manufacturing methods using mechanical means, e.g. ruling with diamond tool, moulding
Abstract
The invention discloses a grating preparation method and a grating, wherein the grating preparation method comprises the following steps: sequentially forming material layers on a substrate by thermoplastic materials, wherein the material of each adjacent material layer is different; after each material layer is formed, acquiring the temperature of the currently formed material layer; when the temperature is lower than the corresponding preset temperature of the currently formed material layer, forming a next material layer on the currently formed material layer; separating the substrate from a stacked material composed of a plurality of material layers when the total thickness of the material layers reaches a preset thickness; the stacked material is cut to obtain a grating. The invention provides a grating preparation method and a grating, and aims to solve the problem that the stability of grating preparation in the prior art is poor.
Description
Technical Field
The invention relates to the technical field of optical device preparation, in particular to a grating preparation method and a grating.
Background
The grating is a commonly used optical device, and the commonly used grating is made by carving a large number of parallel nicks on a glass sheet. The Bragg grating is a fiber grating with uniform grating pitch, the reflection wavelength is very small, and the distances between the reflection points of the Bragg grating are always equal.
When the existing Bragg grating is prepared, a polymer sample needs to be exposed to light and dark stripes by using double-beam interference light, the requirement on an exposure environment is high in the exposure process, and the exposure quality is affected by the change in the environment, so that the problems that the quality of the gratings produced in the same batch has large difference and the stability of the grating preparation is poor are caused.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention provides a grating preparation method and a grating, and aims to solve the problem that the stability of grating preparation in the prior art is poor.
In order to achieve the above object, the present invention provides a grating preparation method, including:
sequentially forming material layers on a substrate by thermoplastic materials, wherein the material of each adjacent material layer is different;
after each material layer is formed, acquiring the temperature of the currently formed material layer;
when the temperature is lower than the corresponding preset temperature of the currently formed material layer, forming a next material layer on the currently formed material layer;
separating the substrate from a stacked material composed of a plurality of material layers when the total thickness of the material layers reaches a preset thickness;
the stacked material is cut to obtain a grating.
Optionally, the step of sequentially forming material layers on the substrate by the thermoplastic material includes:
heating the thermoplastic material;
and if the material temperature of the thermoplastic material is detected to be greater than or equal to the preset melting temperature, executing the step of sequentially forming material layers on the substrate through the thermoplastic material.
Optionally, the step of cutting the stacked material to obtain the grating includes:
stretching the stacked material;
after the stretching process is completed, the stacked material after the stretching process is cut to obtain a grating.
Optionally, the step of stretching the stacked material includes:
heating the stack of materials;
and if the temperature of the stacked material is within a preset temperature range, performing stretching treatment on the stacked material.
Optionally, the preset temperature range is greater than or equal to the glass transition temperature of different materials in the stacked material and is less than or equal to the melting temperature of different materials in the stacked material.
Optionally, the step of performing a stretching process on the stacked material further includes:
acquiring the thickness of the stacked material in the process of stretching treatment;
and when the thickness of the stacked material is within a preset thickness range, stopping the stretching treatment of the stacked material.
Optionally, the step of cutting the stacked material to obtain the grating includes:
determining a cutting direction, wherein the cutting direction intersects any material layer in the stack of materials;
and cutting the stacked material after the stretching operation is finished according to the cutting direction to obtain the grating.
To achieve the above object, the present application proposes a grating prepared by the method for preparing a grating according to any one of the claims.
The application provides a grating preparation method, which is applied to a grating preparation device, wherein the grating preparation device comprises a substrate, and the grating preparation method comprises the following steps: sequentially forming material layers on a substrate by thermoplastic materials, wherein the material of each adjacent material layer is different; after each material layer is formed, acquiring the temperature of the currently formed material layer; when the temperature is lower than the corresponding preset temperature of the currently formed material layer, forming a next material layer on the currently formed material layer; separating the substrate from a stacked material composed of a plurality of material layers when the total thickness of the material layers reaches a preset thickness; the stacked material is cut to obtain a grating. The grating is prepared in a physical processing mode, and exposure operation is not needed in the preparation process of the grating, so that the requirement on the preparation environment of the grating is low, the grating is not easily influenced by the preparation environment in the preparation process, and the problem of poor stability in the preparation of the grating in the prior art is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of example 1 of a grating production method according to the present invention;
FIG. 3 is a schematic flow chart of example 2 of a grating production method according to the present invention;
FIG. 4 is a schematic flow chart of example 3 of a grating production method according to the present invention;
FIG. 5 is a schematic flow chart of the grating production method of example 4 of the present invention;
FIG. 6 is a schematic flow chart of example 5 of a grating production method according to the present invention;
FIG. 7 is a schematic flow chart of the grating production method of example 6 of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the apparatus may include: a controller 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the controller 1001 described above.
Those skilled in the art will appreciate that the configuration of the device shown in fig. 1 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, the memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and an application program.
In the server shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the controller 1001 may be used to call an application stored in the memory 1005 and perform the following operations:
sequentially forming material layers on a substrate by thermoplastic materials, wherein the material of each adjacent material layer is different;
after each material layer is formed, acquiring the temperature of the currently formed material layer;
when the temperature is lower than the corresponding preset temperature of the currently formed material layer, forming a next material layer on the currently formed material layer;
separating the substrate from a stacked material composed of a plurality of material layers when the total thickness of the material layers reaches a preset thickness;
the stacked material is cut to obtain a grating.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
heating the thermoplastic material;
and if the material temperature of the thermoplastic material is detected to be greater than or equal to the preset melting temperature, executing the step of sequentially forming material layers on the substrate through the thermoplastic material.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
stretching the stacked material;
after the stretching process is completed, the stacked material after the stretching process is cut to obtain a grating.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
heating the stack of materials;
and if the temperature of the stacked material is within a preset temperature range, performing stretching treatment on the stacked material.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
acquiring the thickness of the stacked material in the process of stretching treatment;
and when the thickness of the stacked material is within a preset thickness range, stopping the stretching treatment of the stacked material.
Further, the controller 1001 may call an application program stored in the memory 1005, and also perform the following operations:
determining a cutting direction, wherein the cutting direction intersects any material layer in the stack of materials;
and cutting the stacked material after the stretching operation is finished according to the cutting direction to obtain the grating.
The application provides a grating preparation method and a grating.
Example 1
Referring to fig. 2, the grating preparation method is applied to a grating preparation apparatus, the grating preparation apparatus includes a substrate, and the grating preparation method includes:
s100, sequentially forming material layers on a substrate through thermoplastic materials, wherein the material of each adjacent material layer is different;
wherein the thermoplastic plastic is plastic which has plasticity at a certain temperature, solidifies after cooling and can repeat the process. The grating preparation device forms the material layer on the substrate in a spraying or coating mode.
In order to meet the performance requirement of the prepared grating, the refractive index of the first material is not equal to the refractive index of the second material, in a specific embodiment, the grating is composed of two thermoplastic materials, the two thermoplastic materials are stacked in sequence, specifically, the thermoplastic materials include the first material and the second material, the first material is sprayed or coated to form a first material layer, the second material is sprayed or coated to form a second material layer, and the first material layer and the second material layer are stacked in sequence on the substrate.
In order to ensure that the grating can be removed from the grating fabricating apparatus after fabrication, the material of the substrate cannot be bonded to the first material layer, and the first material layer can be physically or chemically separated from the substrate after the first material layer is formed on the substrate.
S200, after each material layer is formed, acquiring the temperature of the currently formed material layer;
s300, when the temperature is lower than the corresponding preset temperature of the currently formed material layer, forming a next material layer on the currently formed material layer;
after the first material layer is prepared, it is required to ensure that the first material layer is cooled and then the second material layer is prepared, specifically, the preset temperature corresponding to the material layer is the glass transition temperature of the material corresponding to the material layer, the glass transition temperature is the temperature corresponding to the material which is converted from a glass state to a high elastic state, and when the temperature of the material exceeds the glass transition temperature, the material can be stretched or compressed, so that the shape of the material is changed. When the temperature of the material layer is lower than the corresponding preset temperature, the material solidification of the first material layer can be ensured, and the second material layer formed by the second material is conveniently formed on the first material layer.
S400, when the total thickness of the material layers reaches a preset thickness, separating the substrate from a stacked material consisting of a plurality of material layers;
and S500, cutting the stacked material to obtain the grating.
In the above specific embodiment, after the plurality of first material layers and the plurality of second material layers are sequentially and alternately prepared, the stacked material composed of the plurality of material layers is separated from the substrate, and is cut according to the size of the grating, so as to obtain the grating after cutting.
The application provides a grating preparation method, which is applied to a grating preparation device, wherein the grating preparation device comprises a substrate, and the grating preparation method comprises the following steps: sequentially forming material layers on a substrate by thermoplastic materials, wherein the material of each adjacent material layer is different; after each material layer is formed, acquiring the temperature of the currently formed material layer; when the temperature is lower than the corresponding preset temperature of the currently formed material layer, forming a next material layer on the currently formed material layer; separating the substrate from a stacked material composed of a plurality of material layers when the total thickness of the material layers reaches a preset thickness; the stacked material is cut to obtain a grating. The grating is prepared in a physical processing mode, and exposure operation is not needed in the preparation process of the grating, so that the requirement on the preparation environment of the grating is low, the grating is not easily influenced by the preparation environment in the preparation process, and the problem of poor stability in the preparation of the grating in the prior art is solved.
Example 2
Referring to fig. 3, in embodiment 1, the step S100 includes:
s110, heating the thermoplastic material;
and S120, if the material temperature of the thermoplastic material is detected to be greater than or equal to the preset melting temperature, sequentially forming material layers through the thermoplastic material.
When a thermoplastic material is sprayed or coated on the substrate to form the material layer, in order to ensure the flowability of the thermoplastic material, the thermoplastic material is first heated to a corresponding melting temperature, then the thermoplastic material is melted into a liquid, and then the spraying or coating operation is performed on the thermoplastic material.
Specifically, when the material temperature of the thermoplastic material is detected to be greater than the preset melting temperature, the thermoplastic material is in a liquid state, and the thermoplastic material is in a flowable liquid state, so that the thermoplastic material can be coated on the substrate or the material layer on the substrate in a spraying or coating manner.
In a specific embodiment, the grating is composed of a first material layer formed by a first material and a second material layer formed by a second material, the second material layer is formed by a first material, after the first material layer is prepared, in order to prepare the second material layer on the basis of the first material layer, in order to avoid mixing the second material with the first material when preparing the second material layer, the operation of preparing the second material layer is required to be executed when waiting for the first material layer to be cooled and the temperature of the first material layer is reduced to be lower than the glass transition temperature of the first material, specifically, the temperature of the first material layer is detected by a temperature measuring sensor, and the step of preparing the second material layer is executed when the temperature of the first material is lower than a first preset temperature, wherein the first preset temperature is the glass transition temperature of the first material, when the temperature of the first material is less than the glass transition temperature of the first material, the first material is in a solid state, thereby facilitating the preparation of the second material layer.
It can be understood that, because the thickness of the first material layer is relatively thin, when the temperature of the first material layer is detected, the surface temperature of the first material layer can be directly detected for determination, preferably, the temperature measurement direction of the temperature measurement sensor points to the first material layer, the temperature measurement mode of the temperature measurement sensor can be contact measurement or non-contact measurement, and when the temperature measurement mode of the temperature measurement sensor is contact measurement, the temperature measurement sensor is a resistance thermometer or a pressure thermometer; when the temperature measurement mode of the temperature measurement sensor is non-contact measurement, the measurement sensor is an infrared thermometer.
Example 3
Referring to fig. 4, in embodiment 1, the step S500 includes:
s510, stretching the stacked material;
after the stacked material is formed by alternately coating the first material layer and the second material layer, the stacked material can be stretched to change the thickness of the stacked material, so that the preparation of the grating is facilitated, because the size requirements of different gratings are more and the thickness of the stacked material cannot completely meet the size requirements of the grating. Specifically, can be right through stretching device the material that piles up carries out tensile operation, stretching device is including the fixture that sets up relatively, two fixture centre gripping pile up the both sides edge of material to the direction that keeps away from each other removes, thereby drives it takes place to deform to pile up the material, changes the thickness of piling up the material.
And S520, cutting the stacked material after the stretching treatment is finished to obtain the grating.
After the stacked material is stretched, the stacked material can be cut to obtain the grating, and the grating formed in a physical mode can be prepared without exposure operation, so that the grating is not easily influenced by a preparation environment in the preparation process, and the problem of poor stability in the preparation of the grating in the prior art is solved.
Example 4
Referring to fig. 5, in embodiment 3, the step S510 includes:
s511, heating the stacked material;
s512, if the temperature of the stacked material is within a preset temperature range, the step of stretching the stacked material is executed.
In order to ensure that the stacked material can be deformed, before the stacked material is stretched, the plurality of material layers in the stacked material need to be heated to a vitrified state, so that each material layer can be deformed in the stretching process, and the problem of fracture of the stacked material is avoided. Specifically, the preset temperature range is an intersection of corresponding temperature ranges of a plurality of thermoplastic materials of the stacked material, and the temperature range of the thermoplastic material is greater than or equal to the glass transition temperature of the thermoplastic material and less than or equal to the melting temperature of the thermoplastic material.
In a preferred embodiment, the predetermined temperature range is greater than or equal to the glass transition temperature of the different materials in the stack material and less than or equal to the melting temperature of the different materials in the stack material.
In a specific embodiment, the stacked material is formed by sequentially and alternately stacking a first material layer formed by a first material and a second material layer formed by a second material, wherein a first glass transition temperature of the first material is 80 ℃, a first melting temperature is 120 ℃, a second glass transition temperature of the second material is 100 ℃, and a second melting temperature is 160 ℃, so that a temperature range of the first material is 80-120 ℃, a temperature range of the second material is 160 ℃, and a predetermined temperature range is 120 ℃ of 100-. When the stacked material is heated to 100-120 ℃, a stretching operation is performed on the stacked material.
In another specific embodiment, the first glass transition temperature of the first material is 80 degrees celsius, the first melting temperature is 120 degrees celsius, the second glass transition temperature of the second material is 150 degrees celsius, and the second melting temperature is 210 degrees celsius, so that the temperature range of the first material is 80-120 degrees celsius, the temperature range of the second material is 150 degrees celsius and 210 degrees celsius, and in order to ensure that the first material layer and the second material layer can not break during the stretching operation after heating, the predetermined temperature range is 150 degrees celsius and 210 degrees celsius. Performing a stretching operation on the stacked material when the stacked material is heated to 150-210 ℃.
Example 5
Referring to fig. 6, in embodiment 3, the step S510 further includes:
s600, acquiring the thickness of the stacked material in the process of stretching treatment;
s700, when the thickness of the stacked material is within a preset thickness range, stopping the stretching treatment of the stacked material.
Specifically, when the length of the grating is 10mm, the preset thickness range may be set to 10-11mm, so that when the stacked material is stretched, the thickness of the stacked material is gradually reduced, and when the thickness of the stacked material is greater than or equal to 10mm and less than or equal to 11mm, the stretching process is stopped, and the grating is obtained after the stacked material is continuously cut. In a preferred embodiment, when the thickness of the stacked material is detected, the sensor used may be a contact type sensor including, but not limited to, a thickness gauge or a non-contact type sensor including, but not limited to, an optical sensor.
Example 6
Referring to fig. 7, in embodiment 3, the step S500 includes:
s530, determining a cutting direction, wherein the cutting direction is intersected with any material layer in the stacked materials;
and S540, cutting the stacked material after the stretching operation is finished according to the cutting direction to obtain the grating.
In a specific embodiment, when the grating is a non-tilted bragg grating, the cutting direction of the stacked material is perpendicular to the surface of the stacked material, and when the grating is a tilted bragg grating, the cutting direction of the stacked material and the surface of the stacked material form an acute angle.
In order to achieve the above object, the present application further provides a grating prepared by the method of any one of the above embodiments.
In order to achieve the above object, the present application provides a grating preparation apparatus, which includes a memory, a processor, and a grating preparation program stored in the memory and executable on the processor, where the processor executes the grating preparation program to implement the grating preparation method according to any one of the above embodiments.
In some alternative embodiments, the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage may be an internal storage unit of the device, such as a hard disk or a memory of the device. The memory may also be an external storage device of the device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the device. Further, the memory may also include both internal and external storage units of the device. The memory is used for storing the computer program and other programs and data required by the device. The memory may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A grating preparation method is characterized in that the grating is a Bragg grating, and the grating preparation method comprises the following steps:
sequentially forming material layers on a substrate by thermoplastic materials, wherein the material of each adjacent material layer is different;
after each material layer is formed, acquiring the temperature of the currently formed material layer;
when the temperature is lower than the corresponding preset temperature of the currently formed material layer, forming a next material layer on the currently formed material layer;
separating the substrate from a stacked material composed of a plurality of material layers when the total thickness of the material layers reaches a preset thickness;
the stacked material is cut to obtain a grating.
2. The method of manufacturing a grating of claim 1 wherein the step of sequentially forming layers of material on the substrate from the thermoplastic material comprises:
heating the thermoplastic material;
and if the material temperature of the thermoplastic material is detected to be greater than or equal to the preset melting temperature, executing the step of sequentially forming material layers on the substrate through the thermoplastic material.
3. The method of manufacturing a grating of claim 1 wherein the step of cutting the stack of material to obtain a grating comprises:
stretching the stacked material;
after the stretching process is completed, the stacked material after the stretching process is cut to obtain a grating.
4. The method of fabricating a grating of claim 3 wherein the step of stretching the stack of material comprises:
heating the stack of materials;
and if the temperature of the stacked material is within a preset temperature range, performing stretching treatment on the stacked material.
5. The method of fabricating a grating of claim 4 wherein the predetermined temperature range is greater than or equal to a glass transition temperature of the different materials in the stack of materials and less than or equal to a melting temperature of the different materials in the stack of materials.
6. The method of fabricating a grating of claim 3 wherein the step of stretching the stack of materials is followed by the step of:
acquiring the thickness of the stacked material in the process of stretching treatment;
and when the thickness of the stacked material is within a preset thickness range, stopping the stretching treatment of the stacked material.
7. The method of manufacturing a grating of claim 1 wherein the step of cutting the stack of material to obtain a grating comprises:
determining a cutting direction, wherein the cutting direction intersects any material layer in the stack of materials;
and cutting the stacked material after the stretching operation is finished according to the cutting direction to obtain the grating.
8. A grating prepared by the method of any one of claims 1-7.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3427175B2 (en) * | 1999-10-04 | 2003-07-14 | 株式会社メイプラ関東 | Manufacturing method of thermoplastic synthetic resin lattice plate |
| CN103596755A (en) * | 2011-04-28 | 2014-02-19 | 塔塔钢铁艾默伊登有限责任公司 | Process for producing a polymer coated metal substrate and a metal strip substrate provided with a polymer coating |
| CN106896435A (en) * | 2017-02-22 | 2017-06-27 | 重庆卓美华视光电有限公司 | Grating Film preparation method, apparatus and system |
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| US6975765B2 (en) * | 2003-05-06 | 2005-12-13 | New Light Industries, Ltd. | Optically variable form birefringent structure and method and system and method for reading same |
| US9880328B2 (en) * | 2013-12-12 | 2018-01-30 | Corning Incorporated | Transparent diffusers for lightguides and luminaires |
| CN108957611B (en) * | 2018-07-13 | 2021-05-14 | 歌尔股份有限公司 | Manufacturing method of grating sheet, grating sheet and display device |
| CN110275244B (en) * | 2019-06-26 | 2021-03-23 | 苏州东辉光学有限公司 | Method for preparing volume Bragg grating |
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| JP3427175B2 (en) * | 1999-10-04 | 2003-07-14 | 株式会社メイプラ関東 | Manufacturing method of thermoplastic synthetic resin lattice plate |
| CN103596755A (en) * | 2011-04-28 | 2014-02-19 | 塔塔钢铁艾默伊登有限责任公司 | Process for producing a polymer coated metal substrate and a metal strip substrate provided with a polymer coating |
| CN106896435A (en) * | 2017-02-22 | 2017-06-27 | 重庆卓美华视光电有限公司 | Grating Film preparation method, apparatus and system |
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