CN111474609A - Bionic compound eye and preparation method and application thereof - Google Patents
Bionic compound eye and preparation method and application thereof Download PDFInfo
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- CN111474609A CN111474609A CN202010331334.2A CN202010331334A CN111474609A CN 111474609 A CN111474609 A CN 111474609A CN 202010331334 A CN202010331334 A CN 202010331334A CN 111474609 A CN111474609 A CN 111474609A
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Abstract
The invention belongs to the technical field of bionic compound eyes, and particularly relates to a bionic compound eye and a preparation method and application thereof. In the invention, the polarized light-emitting micron line prepared from polydiynoic acid is adopted to simulate the rod sensing structure in the insect compound eye in nature, the polydiynoic acid polarized light-emitting micron line simulation rod has good optical waveguide performance and polarization characteristic, the polydiynoic acid polarized light-emitting micron line in the bionic compound eye is similar to the rod sensing function in the insect compound eye structure in terms of structural parameters and waveguide properties, the angle and the intensity of light can be detected simultaneously in the process of transmitting the light, the visual orientation function is realized, and the functions of visual orientation and polarized navigation of the insect ommatium are completely realized by combining the transparent circular arc-shaped micro lens structure.
Description
Technical Field
The invention belongs to the technical field of bionic compound eyes, and particularly relates to a bionic compound eye and a preparation method and application thereof.
Background
With the development of science and technology, the application of optical imaging elements is more and more extensive, and mobile phones, computers, projectors, robots, unmanned aerial vehicles and large telescopes are provided with independent imaging elements, and the optical imaging elements are developed towards the trend of large visual field, miniaturization and light weight. The bionic compound eye has the advantages in the aspects as an optical device in an imaging system, so that the research on the bionic compound eye optical system is a hotspot in the current bionic field.
At present, many research groups at home and abroad develop the research of the artificial compound eye structure imitating the insect compound eye structure. The artificial compound eye structure consists of a plurality of small eye systems distributed on a curved surface, each small eye forms an independent imaging channel and consists of a lens and a sensing rod, and the optical axis of the artificial compound eye structure points to a certain specific direction and images an object in the view field of the artificial compound eye structure. All the small eyes act together to form a multi-channel imaging system. The method is a novel imaging element with great potential, and the research on a practical, simple and convenient artificial small eye forming technology is more and more important.
However, few rod-sensing structure researches of the bionic compound eye currently still remain in the stages of model establishment and parameter simulation, and how to find a suitable rod-sensing structure to apply to the bionic compound eye is a technical problem to be solved urgently by technical staff in the field.
Disclosure of Invention
In view of the above, the invention provides a bionic compound eye and a preparation method and application thereof, wherein a polarized light-emitting micron line prepared from polydiynoic acid is adopted to simulate a rod sensing structure in an insect compound eye in nature, the simulated rod sensing structure of the polydiynoic acid polarized light-emitting micron line has good optical waveguide performance and polarization characteristic, and the simulated rod sensing structure can simultaneously detect the angle and the intensity of light in the process of transmitting light and has a visual orientation function.
The specific technical scheme of the invention is as follows:
the invention provides a preparation method of a bionic compound eye, which comprises the following steps:
s1: injecting a melt liquid of a diacetylenic acid monomer into more than two holes of a transparent soft mold, cooling to obtain diacetylenic acid microwires, grouping the holes, irradiating the diacetylenic acid microwires in different groups of the holes by adopting ultraviolet light in different polarization directions, and then heating, wherein different groups of the diacetylenic acid microwires form polydiacetylenic acid polarized light-emitting microwires with different polymer chain arrangement directions;
s2: curing the poly-diacetylenic acid polarized light-emitting micron line by adopting photocureable resin to form a transparent arc-shaped micro-lens structure, and then bending the transparent soft mold to form a curved surface structure to obtain the bionic compound eye;
wherein the aperture of the hole is 1-20 μm, and the hole depth of the hole is 50-200 μm.
The diacetylenic acid monomer compound has a unique quasi-one-dimensional electron conjugated molecular structure and shows excellent optical and electrical properties, under the irradiation of ultraviolet light, colorless diacetylenic acid monomers are polymerized to form blue high-molecular polydiacetylenic acid, and under the external stimulation (such as light, heat, pH, pressure and the like), the effective conjugated chain length of the polydiacetylenic acid high-molecular chain can be changed to cause color conversion (blue is converted into red), and meanwhile, fluorescence can be emitted.
According to the bionic compound eye, a melt liquid of a diyne monomer is injected into more than two holes of a transparent soft mold, the diyne micron lines are obtained through cooling, the holes are grouped, the diyne micron lines in different groups of holes are irradiated by ultraviolet light in different polarization directions, heating treatment is carried out, different groups of diyne micron lines form polydiyne polarized light-emitting micron lines with different polymer chain arrangement directions, a light-cured resin is used for curing the polydiyne polarized light-emitting micron lines to form a transparent arc-shaped micro-lens structure, and the transparent soft mold is bent to form a curved surface structure, so that the bionic compound eye is obtained.
The polydiyne acid polarization luminescence micron line simulation rod has good optical waveguide performance and polarization characteristic, the polydiyne acid polarization luminescence micron line and a rod-shaped structure in the insect compound eye in the form are both micron-sized linear or rod-shaped structures, and the polydiyne acid polarization luminescence micron line and the rod-shaped structure in the insect compound eye can recognize the polarization of light beams with different angles in natural light functionally The vibration direction of the polydiacetylene acid polarized light-emitting microwire in the bionic compound eye is similar to the function of a visual rod in an insect compound eye structure from structural parameters or waveguide properties, the angle and the intensity of light can be detected simultaneously in the process of transmitting the light, the visual orientation function is realized, and the functions of visual orientation and polarized navigation of insect ommatidium are completely realized by combining a transparent circular-arc micro lens structure.
The method comprises the steps of preparing the diacetylenic acid microwire by a diacetylenic acid monomer, and enabling the arrangement directions of polymer chains in the polydiacetylenic acid polarized light-emitting microwire formed by different groups to be different by using ultraviolet light with different polarization directions, so that the polarized light in different directions can be effectively identified, and the polydiacetylenic acid polarized light-emitting microwire is used for simulating a rod-sensing beam in a compound eye structure, so that the function of identifying the polarized light in multiple angles is realized.
Preferably, the diynoic acid monomer is selected from 10, 12-pentacosadiynoic acid, 10, 12-tricosandiynoic acid or amino-substituted 10, 12-pentacosadiynoic acid.
The structural formula of the diynoic acid monomer selected from 10, 12-pentacosadiynoic acid, 10, 12-tricosanedioic acid and amino-substituted 10, 12-pentacosadiynoic acid is as follows in sequence:
Preferably, the material of the transparent flexible mold is polydimethylsiloxane.
Preferably, the light-curable resin is selected from SU-8, epoxy acrylic resin, polyurethane acrylic resin, amino acrylic resin or polyester acrylic resin.
Preferably, the step S2 of forming the transparent circular arc microlens structure on the polydiacetylene acid polarized light emitting microwire by curing with a photocurable resin specifically includes:
and forming the transparent arc-shaped micro lens structure on the poly-diacetylenic acid polarized light-emitting micro line by adopting the photocuring resin through photocuring, printing and curing.
The invention combines the method of photocuring printing (3D printing) to quickly and simply prepare the transparent circular arc micro-lens structure (three-dimensional micro-lens) which can simulate the cornea and the crystal cone structure in the compound eye of the insect, and the function-visual orientation and polarization navigation of the small eye of the insect can be completely realized by combining the transparent circular arc micro-lens structure and the polydiacetylene acid polarization luminescent microwire.
More specifically, the photocuring printing adopts light to scan the surface of the liquid photosensitive resin, and a thin layer with a certain thickness is generated each time, so that the object is generated layer by layer from the bottom. The utilization rate of the raw material liquid photosensitive resin by adopting photocuring printing is nearly 100%, the size precision is high, the surface quality is excellent, the transparent circular arc-shaped micro lens structure in the bionic compound eye prepared by photocuring printing is quick and simple, the preparation period is short, the automation degree is high, the reliable guarantee is provided for the structure optimization design and mass production of the bionic compound eye, and the foundation is laid for more and more applications of the bionic compound eye in the fields of wide-field imaging, quick signal processing, internal medicine diagnosis, light field photography and the like. On the basis of deep analysis of the compound eye of the insect, the invention breaks through the limitation of the traditional optical design, obtains the bionic compound eye by combining photocuring printing and polydiacetylene acid polarized light-emitting microwire, and can further promote the practical process of artificial compound eye.
Preferably, the step S2 of forming the transparent circular arc microlens structure on the polydiacetylene acid polarized light emitting microwire by curing with a photocurable resin specifically includes:
and injecting the light-cured resin on the surface of the polydiyne acid polarized light-emitting micron line, and curing the light-cured resin to form the transparent arc-shaped micro-lens structure.
The invention controls the arrangement direction of polymer chains in polydiynoic acid through polarized ultraviolet light in the process of polymerizing diynoic acid monomer micromolecules into polydiynoic acid macromolecules, the structure determines the performance, and polydiynoic acid polarized light-emitting microwires with different arrangement directions of the polymer chains can respond to polarized light in different directions; and a transparent arc-shaped micro-lens structure is formed at the end of the polydiyne acid polarized light-emitting micron line, so that the compound eye structure is completely simulated. And coupling the light beam into a transparent arc-shaped micro-lens structure at the end of the polydiyne acid polarized luminescent microwire, and transmitting the light beam to the other end of the polydiyne acid polarized luminescent microwire through a waveguide process. The bionic compound eye has the advantages of large field of view, high time resolution, light weight, miniaturization and the like, and has strong application value in many fields.
Injecting a melt liquid of a diyne acid monomer into a hole of a transparent soft mold, cooling to obtain a diyne acid microwire, irradiating by adopting ultraviolet light with different polarization directions, heating to obtain a polydiyne acid polarized light-emitting microwire capable of identifying polarized light, and influencing the arrangement direction of a polymer chain by adopting additional ultraviolet light according to the relationship between the structure and the performance of a material so as to obtain the polydiyne acid polarized light-emitting microwire meeting the requirement, wherein the polydiyne acid polarized light-emitting microwire is used for simulating a rod sensing structure in compound eyes to realize the identification of the polarized light; then, a transparent arc-shaped micro-lens structure is rapidly prepared by photocuring and printing, the structure and the function of the small eye of the insect are completely simulated, the preparation process is simple and convenient, and the practicability is high; the polydiyne acid polarized light-emitting micron line and the transparent circular arc-shaped micro-lens structure are combined together to realize the visual orientation and polarized navigation functions of the bionic compound eye.
Preferably, the thickness of the transparent flexible mold in the non-hole area is 2-10 μm. The non-hole area refers to the distance between the bottom of the hole and the other surface of the transparent soft film.
The invention also provides a bionic compound eye which is prepared by the preparation method of the technical scheme.
The invention also provides a polarized light navigator, which comprises the bionic compound eye.
The invention also provides a visual orientation instrument, which comprises the bionic compound eye.
In summary, the invention provides a preparation method of a bionic compound eye, which comprises the following steps: s1: injecting a melt liquid of a diacetylenic acid monomer into more than two holes of a transparent soft mold, cooling to obtain diacetylenic acid microwires, grouping the holes, irradiating the diacetylenic acid microwires in different groups of the holes by adopting ultraviolet light in different polarization directions, and then heating, wherein different groups of the diacetylenic acid microwires form polydiacetylenic acid polarized light-emitting microwires with different polymer chain arrangement directions; s2: curing the poly-diacetylenic acid polarized light-emitting micron line by adopting photocureable resin to form a transparent arc-shaped micro-lens structure, and then bending the transparent soft mold to form a curved surface structure to obtain the bionic compound eye; wherein the aperture of the hole is 1-20 μm, and the hole depth of the hole is 50-200 μm. In the invention, the polarized light-emitting micron line prepared from polydiynoic acid is adopted to simulate the rod sensing structure in the insect compound eye in nature, the polydiynoic acid polarized light-emitting micron line simulation rod has good optical waveguide performance and polarization characteristic, the polydiynoic acid polarized light-emitting micron line in the bionic compound eye is similar to the rod sensing function in the insect compound eye structure in terms of structural parameters and waveguide properties, the angle and the intensity of light can be detected simultaneously in the process of transmitting the light, the visual orientation function is realized, and the functions of visual orientation and polarized navigation of the insect ommatium are completely realized by combining the transparent circular arc-shaped micro lens structure.
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.
FIG. 1 is a schematic structural diagram of a bionic compound eye and an enlarged schematic diagram of an area A and an area B in the bionic compound eye, which are manufactured in an embodiment of the invention;
FIG. 2 is a schematic flow chart of step 1) performed in the area A according to the embodiment of the present invention;
FIG. 3 is a schematic flow chart of step 2) performed in the area A according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of the response of different sets of polydiyne polarized light-emitting micro-wires in the region A to different polarization directions in the embodiment of the present invention;
illustration of the drawings: 1. a sensing rod; 2. a transparent circular arc-shaped micro lens structure; 3. a transparent soft mold; 4. the polydiyne acid polarized light-emitting microwire with different polymer chain arrangement directions.
Detailed Description
The invention provides a bionic compound eye and a preparation method and application thereof.A polarized light-emitting micron line prepared from polydiynoic acid is adopted to simulate a rod sensing structure in the insect compound eye in nature, the polydiynoic acid polarized light-emitting micron line simulation rod has good optical waveguide performance and polarization characteristic, the angle and the intensity of light can be detected simultaneously in the process of transmitting the light, and the bionic compound eye has a visual orientation function.
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
Example 1
Referring to fig. 1, a schematic structural diagram of a bionic compound eye and an enlarged schematic diagram of an area a and an area B in the bionic compound eye manufactured in the embodiment of the present invention are shown in the present embodiment, a polydiynoic acid polarized light emitting microwire is a sensing rod 1, a transparent arc-shaped microlens structure 2 is formed on the sensing rod 1, and the preparation of the bionic compound eye includes the following steps:
1) preparation of polydiynoic acid polarized light-emitting micron line
Please refer to fig. 2, which is a flowchart illustrating the step 1) performed in the area a according to the embodiment of the present invention. The aperture of the hole is 5 μm, the depth of the hole is 100 μm, and the thickness of the transparent soft mold in the non-hole area is 3 μm. Taking the area A as a representative, heating and melting 10, 12-pentacosadiynoic acid into a flowable liquid state, injecting the flowable liquid state into a hole of a transparent soft die prepared from Polydimethylsiloxane (PDMS), cooling to obtain diynoic acid microwires, dividing the hole into four groups a, b, c and d, and irradiating the diynoic acid microwires in the four groups of holes for 10min by using non-polarized ultraviolet light, linearly polarized light with different polarization directions and circularly polarized light respectively, wherein in the process, the diynoic acid microwires are polymerized into blue polydiynoic acid microwires, and then heating to 90 ℃ for 10min, so that the blue polydiynoic acid microwires are converted into red polydiynoic acid polarized luminescent microwires, and the polydiynoic acid polarized luminescent microwires simultaneously show fluorescence. In the step, polydiyne acid polarization luminescence microwires with different polymer chain arrangement directions can be obtained in different polarization photopolymerization processes, and the polydiyne acid polarization luminescence microwires can well identify the polarization direction of exciting light through the intensity of emergent light in the waveguide process.
2) Preparation of transparent arc-shaped micro lens structure
Fig. 3 is a schematic flow chart of the step 2) performed in the area a according to the embodiment of the present invention. Adopting liquid photosensitive resin SU-8 as a base material for photocuring printing, and controlling a projector light beam to scan the photosensitive resin according to the layered section information of the lens by a computer to generate photopolymerization, wherein a thin layer section of a transparent circular-arc micro-lens structure is formed by curing each time; after each layer is cured, the working platform moves by one layer thickness, then a new layer of liquid photosensitive resin is coated on the surface of the cured photosensitive resin so as to carry out next layer scanning curing, the newly cured layer is firmly adhered to the previous layer, and the steps are repeated until the transparent arc-shaped micro-lens structure is manufactured.
And then bending the transparent soft film to form a curved surface structure to obtain the bionic compound eye.
Fig. 4 is a schematic diagram illustrating the response of different sets of polydiyne polarized light-emitting micro-wires in the region a to different polarization directions according to an embodiment of the present invention. And taking the area A as a representative, the transparent soft film 3 is of a curved surface structure, the polymer chains of the polydiyne acid polarized light-emitting microwire in the four groups of holes a, b, c and d are arranged in different directions, the end of the polydiyne acid polarized light-emitting microwire connected with the transparent arc-shaped microlens structure is placed under an objective lens, light beams are coupled into the transparent arc-shaped microlens structure of the end of the polydiyne acid polarized light-emitting microwire, and then the light beams are transmitted to the other end of the polydiyne acid polarized light-emitting microwire through a waveguide process, so that the polarization state of coupled light is changed, and the change condition of an optical signal is recorded. In fig. 4, the polydiynoic acid polarized luminescent microwire 4 with different arrangement directions of polymer chains can respond to polarized light with different directions.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A preparation method of a bionic compound eye is characterized by comprising the following steps:
s1: injecting a melt liquid of a diacetylenic acid monomer into more than two holes of a transparent soft mold, cooling to obtain diacetylenic acid microwires, grouping the holes, irradiating the diacetylenic acid microwires in different groups of the holes by adopting ultraviolet light in different polarization directions, and then heating, wherein different groups of the diacetylenic acid microwires form polydiacetylenic acid polarized light-emitting microwires with different polymer chain arrangement directions;
s2: curing the poly-diacetylenic acid polarized light-emitting micron line by adopting photocureable resin to form a transparent arc-shaped micro-lens structure, and then bending the transparent soft mold to form a curved surface structure to obtain the bionic compound eye;
wherein the aperture of the hole is 1-20 μm, and the hole depth of the hole is 50-200 μm.
2. The method of claim 1, wherein the diynoic acid monomer is selected from 10, 12-pentacosadiynoic acid, 10, 12-tricosandiynoic acid, or amino-substituted 10, 12-pentacosadiynoic acid.
3. The method for preparing the transparent flexible mold according to claim 1, wherein the material of the transparent flexible mold is polydimethylsiloxane.
4. The method according to claim 1, wherein the photocurable resin is selected from SU-8, epoxy acrylic resin, urethane acrylic resin, amino acrylic resin, and polyester acrylic resin.
5. The preparation method according to claim 1, wherein the step of S2, curing the polydiacetylene acid polarized light-emitting micro-line with a photo-curing resin to form a transparent circular arc-shaped micro-lens structure specifically comprises:
and forming the transparent arc-shaped micro lens structure on the poly-diacetylenic acid polarized light-emitting micro line by adopting the photocuring resin through photocuring, printing and curing.
6. The preparation method according to claim 1, wherein the step of S2, curing the polydiacetylene acid polarized light-emitting micro-line with a photo-curing resin to form a transparent circular arc-shaped micro-lens structure specifically comprises:
and injecting the light-cured resin on the surface of the polydiyne acid polarized light-emitting micron line, and curing the light-cured resin to form the transparent arc-shaped micro-lens structure.
7. The method according to claim 1, wherein the thickness of the transparent flexible mold in the non-porous region is 2 to 10 μm.
8. A bionic compound eye, which is prepared by the preparation method of any one of claims 1 to 7.
9. A polarized light navigator comprising the bionic compound eye according to claim 8.
10. A visual orientation instrument comprising the biomimetic compound eye of claim 8.
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