CN107718611A - One kind is based on 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure - Google Patents
One kind is based on 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure Download PDFInfo
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- CN107718611A CN107718611A CN201710891099.2A CN201710891099A CN107718611A CN 107718611 A CN107718611 A CN 107718611A CN 201710891099 A CN201710891099 A CN 201710891099A CN 107718611 A CN107718611 A CN 107718611A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00317—Production of lenses with markings or patterns
- B29D11/00326—Production of lenses with markings or patterns having particular surface properties, e.g. a micropattern
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/0048—Moulds for lenses
- B29D11/00548—Moulds for lenses with surfaces formed by films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/0048—Moulds for lenses
- B29D11/00557—Moulds for lenses with deformable mould walls, e.g. to make lenses with different shapes
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0012—Arrays characterised by the manufacturing method
- G02B3/0031—Replication or moulding, e.g. hot embossing, UV-casting, injection moulding
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- Ophthalmology & Optometry (AREA)
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
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Abstract
The invention provides one kind to be based on 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure,Employ the relatively simple compound eye mould injection molding processing mode production curved surface bionic compound eyes of equipment raw material,Equipment cost of material is more cheap,And pass through the improvement to compound eye mould structure,Can be by using the negative-pressure vacuum degree for isolating space layer in the curved surface micropore array mould plate and change setting compound eye mould of different micro lens mould bore dias,Correspond to micro lens mould hole location by suction function recessed depth and curvature to change organosilicon fexible film in compound eye mould,So as to adjust the lenticule curvature of the curved surface bionic compound eyes of injection molding production,Its preparation flow is simple to operate,It is short to prepare the process-cycle,Expansibility is strong,It can be good at ensuring the preparation machining accuracy of bionic compound eyes product,Effectively solve the problems, such as that the convenience for producing different lenticule curvature bionic compound eyes products in the prior art and low cost are difficult to take into account.
Description
Technical field
The present invention relates to bionics optics technical field, more particularly to curved surface bionic compound eyes technology of preparing, and in particular to a kind of
Based on 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure.
Background technology
Bionic compound eyes are opened the principal visual organ of the insect in nature, and extensive concern is received in micro-optics field,
In view of it has the characteristics that small volume, the angle of visual field be big and high sensitivity, it is the important composition portion of micro photo-electro-mechanical integral system
Point.Compound eye is made up of numerous ommatidium, but its volume is in micron dimension, and each ommatidium possesses independent photosensitive energy
Power.Although it is compared to human eye, its resolution ratio is not high, and compound eye generally possesses the angle of visual field of remote superman's eye, and maximum is close
180 °, possibility is provided for the preparation of panorama camera.In addition compound eye has very high sensitivity to moving object, in daily life
Fly is must to hide our attack easily by this characteristic.The achievement in research of bionic compound eyes it is military, civil with it is medical
Had been widely used Deng field, and possess the potential application field of many.
At present, the processing method of bionic compound eyes mainly has direct processing method and note embrane method.Conventional direct processing method is main
Being including ultraprecise Carving Machining method, soft lithography, laser straight literary style etc., the advantages of this kind of method being capable of side as needed
Just on adjusted design bionic compound eyes lenticule curvature, to cause lenticule to reach the focal length of needs, but these processing sides
The problems such as method is longer there is the process-cycle, and equipment is expensive, and technique is more complicated.And it is then by first making bionic compound eyes to note embrane method
Processing mold, then taken out using photosensitive polymer injection molding curing and demolding, obtain bionic compound eyes product, the advantages of this kind of method
That the work cycle is shorter, equipment raw material is simple, and cost is more cheap, but often due to bionic compound eyes processing mold make shaping after,
The shape curvature of lenticule is also fixed by mould accordingly on its bionic compound eyes, to produce the bionical of different lenticule curvature
Compound eye then needs to remake corresponding processing mold, and therefore, it is difficult to realize the flexible tune of lenticule curvature in bionic compound eyes product
Whole processing.This results in current process technology, and there is the convenience for producing different lenticule curvature bionic compound eyes products and low
Cost is difficult to the contradiction taken into account, and under many different application scenarios, generally require a variety of different lenticule curvature and focal length
Bionic compound eyes product.Therefore, how using lower cost scheme it is convenient, flexible produce a variety of different lenticule curvature
Bionic compound eyes product, become an important technology research direction in field.
The content of the invention
For above shortcomings in the prior art, it is an object of the invention to provide one kind to be based on 3D printing and negative pressure
Formed in mould bionic compound eyes preparation method, the compound eye mould injection molding processing mode production that it uses equipment raw material relatively simple are bent
Face bionic compound eyes, and by the improvement to compound eye mould structure, can be by using the curved surface of different micro lens mould bore dias
The negative-pressure vacuum degree for isolating space layer in microwell array template and change setting compound eye mould is imitated to adjust the curved surface of injection molding production
The lenticule curvature of raw compound eye, it is achieved thereby that low cost produces the technology mesh of the bionic compound eyes product of different lenticule curvature
Mark, solve produce in the prior art different lenticule curvature bionic compound eyes products convenience and low cost be difficult to take into account ask
Topic.
In order to solve the above technical problems, present invention employs following technical scheme：
One kind is based on 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, comprises the following steps：
1）Curved surface micropore array mould plate is prepared using 3D printing technique, the curved surface micropore array mould plate is in integrally spherical crown planar,
And arrange row's distribution according to default compound eye array arrangement density on curved surface micropore array mould plate and be provided with the micro- of several insertions
Mirror nib；
2）Organosilicon fexible film, the overall size chi of the organosilicon fexible film is prepared using liquid organosilicon solidification
The very little concave side with the curved surface micropore array mould plate matches；
3）Compound eye mould is built, the compound eye mould is by Die Box device, the curved surface micropore array mould plate and described organic
The combination of silicon fexible film is formed；
The Die Box device includes casing and case lid, and the casing has a hollow chamber of upper end open, and the curved surface is micro-
The week side of boss of pore array template is hermetically fixedly mounted in the side wall of the hollow chamber of the casing, and curved surface micropore array mould plate
Spherical crown planar set top down, so as to by curved surface micropore array mould plate by the hollow chamber of casing be divided into top opening
Space layer and two part of insulating space layer of lower section；The organosilicon fexible film attaches and is laid on the curved surface micropore array
On the concave side of template, and each lenticule nib sealing on curved surface micropore array mould plate is covered so that the isolation
Space layer turns into confined space, and box body device is additionally provided with the vavuum pump for the insulating space layer for being communicated to casing, to
Insulating space layer is vacuumized；The case lid is closed to be covered in the upper end open of casing, and the bottom surface of case lid is dome shape,
When case lid is covered when on casing, the bottom surface of its dome shape is in the concave side of curved surface micropore array mould plate and set with the centre of sphere
State, and the bottom surface of case lid and attaching are laid between the organosilicon fexible film on the concave side of curved surface micropore array mould plate
Leave gap so that be spaced between the bottom surface and organosilicon fexible film of case lid and form injection molding cavity space, on the case lid
Ventilative through hole and miniflow injection canal are provided with, the ventilative through hole and miniflow injection canal are respectively communicated to the injection molding chamber
Two relative positions of spatial edge, and miniflow injection canal is connected via capillary with a miniflow syringe pump；
4）The vavuum pump for starting the compound eye mould vacuumizes to insulating space layer, reaches in the insulating space layer of compound eye mould
After the vacuum of setting, photosensitive polymer is filled into the injection molding cavity space of compound eye mould by miniflow syringe pump, it is to be solidified
Taking-up is stripped afterwards, obtains curved surface bionic compound eyes.
It is above-mentioned to be based in 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, preferably, the song
Face microwell array template is prepared using the stereolithography apparatus method of 3D printing.
It is above-mentioned to be based in 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, preferably, the step
Rapid 2）The middle liquid organosilicon used is added with curing agent for liquid dimethyl silicone polymer, and the addition of curing agent is poly-
The 10% ~ 15% of dimethyl siloxane quality, the organosilicon fexible film being thus prepared are dimethyl silicone polymer flexible thin
Film.
It is above-mentioned to be based in 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, preferably, prepare poly-
Spin-coating method is used during dimethyl siloxane fexible film, the rotating speed for controlling spin coating instrument is 300 ~ 1000rpm, and heat admittedly
Change, heating-up temperature is 60 ~ 80 DEG C, and the heat time is 50 ~ 70min, and the polydimethylsiloxanes that thickness is 80 ~ 150 μm are prepared
Alkane fexible film.
It is above-mentioned to be based in 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, as further preferred scheme,
After obtaining dimethyl silicone polymer fexible film using spin-coating method, 20 ~ 30min first is soaked using absolute alcohol, then by poly- diformazan
Radical siloxane fexible film is taken off from spin coating instrument.
It is above-mentioned to be based in 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, preferably, the mould
Case lid in tool box body device is made up using liquid organosilicon of mould reverse mould.
It is above-mentioned to be based in 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, preferably, the step
Rapid 4）In, the injection rate for filling photosensitive polymer into the injection cavities room of compound eye mould by miniflow syringe pump is 80 ~ 150 μ
L/min。
It is above-mentioned to be based in 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, preferably, the step
Rapid 4）The middle photosensitive polymer used is ultra-violet curing light-sensitive emulsion NOA81.
It is above-mentioned to be based in 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, as further preferred scheme,
After ultra-violet curing light-sensitive emulsion NOA81 being filled in by injection molding cavity space of the miniflow syringe pump to compound eye mould, curing process
Concrete mode be：Compound eye mould is put into ultra-violet apparatus progress ultraviolet light solidification, ultraviolet photoetching power is 200 ~
400W, time for exposure are 1 ~ 2min so that ultra-violet curing light-sensitive emulsion NOA81 solidifies.
Compared to prior art, the present invention has the advantages that：
1st, the present invention is based on 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, and it is relatively simple to employ equipment raw material
Compound eye mould injection molding processing mode production curved surface bionic compound eyes, equipment cost of material is more cheap, and by compound eye mould
The improvement of lamps structure, can be by using the curved surface micropore array mould plate and change setting compound eye mould of different micro lens mould bore dias
Isolate the negative-pressure vacuum degree of space layer in tool, correspond to micro lens mould hole site to change organosilicon fexible film in compound eye mould
, so as to adjust the lenticule curvature of the curved surface bionic compound eyes of injection molding production, realized by suction function recessed depth and curvature at place
The technical goal of the bionic compound eyes product of the different lenticule curvature of inexpensive production.
2nd, the present invention is based on 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, the operation letter of its preparation flow
It is single, prepare that the process-cycle is short, and can be adjusted flexibly used curved surface micropore array mould plate micro lens mould bore dia and every
It is strong from the negative-pressure vacuum degree of space layer, expansibility.
3rd, the present invention is based on passing through 3D printing technique system in 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure
Standby curved surface micropore array mould plate, can be good at ensuring machining accuracy, so as to ensure the preparation machining accuracy of bionic compound eyes product.
4. the present invention is based on 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, pass through miniflow injection canal
Excess injection can effectively drain gas and prevent impurity effect that may be present；Had using NOA81 as moulding material good
Good optical property, it can complete to solidify in 1 ~ 2min, not only shorten process cycle, more effectively protect lithographic equipment.
Brief description of the drawings
Fig. 1 is the flow chart of more focal length bionic compound eyes preparation methods of the invention based on 3D printing.
Fig. 2 is the structural representation of the compound eye mould employed in the inventive method.
Fig. 3 is beaten for 3 different curved surface bionic compound eyes products being prepared in the embodiment of the present invention and one using 3D
Print technology prepares the pictorial diagram of curved surface micropore array mould plate.
Embodiment
The invention provides a kind of 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, its flow such as Fig. 1 institutes
Show, comprise the following steps：
1）Curved surface micropore array mould plate is prepared using 3D printing technique, the curved surface micropore array mould plate is in integrally spherical crown planar,
And arrange row's distribution according to default compound eye array arrangement density on curved surface micropore array mould plate and be provided with the micro- of several insertions
Mirror nib.
Curved surface micropore array mould plate prepared by the step, it is for use as the construction package of compound eye mould.And curved surface micropore
Lenticule nib on array mould plate enters ranks row's design according to default compound eye array arrangement density, for positioning processing curve
Microlens location on bionic compound eyes, therefore the diameter of lenticule nib can be according to lenslet dimension on curved surface bionic compound eyes
Processing request is designed.And in order to preferably ensure the preparation machining accuracy of curved surface micropore array mould plate, beaten preferably with 3D
Prepared by the stereolithography apparatus method of print, its 3D printing machining accuracy error can reach less than 30 μm, can be good at
Ensure machining accuracy.For different productive targets, the different multiple curved surface micropore arrays of micro lens mould bore dia can be prepared
Template is standby.
2）Organosilicon fexible film is prepared using liquid organosilicon solidification, the entirety of the organosilicon fexible film is big
Small size and the concave side of the curved surface micropore array mould plate match.
Organosilicon fexible film prepared by the step is also for use as the construction package of compound eye mould.Prepare liquid used
State organosilicon can use conventional organosilicon material；But preferably, make preferably with liquid dimethyl silicone polymer
To prepare the liquid organosilicon material of organosilicon fexible film, and processed for the ease of solidification, preferably add curing agent wherein,
The addition of curing agent is the 10% ~ 15% of dimethyl silicone polymer quality, and the organosilicon fexible film being thus prepared is
Dimethyl silicone polymer fexible film, it possesses preferably elasticity and toughness.When preparing dimethyl silicone polymer fexible film most
Spin-coating method is used well, can preferably control the thickness for preparing gained dimethyl silicone polymer fexible film；During preparation, control rotation
The rotating speed for applying instrument is 300 ~ 1000rpm, and is heating and curing, and heating-up temperature is 60 ~ 80 DEG C, and the heat time is 50 ~ 70min,
The dimethyl silicone polymer fexible film that thickness is 80 ~ 150 μm is prepared.By polydimethyl siloxane material elasticity and
Toughness properties, use spin-coating method to prepare thickness as 80 ~ 150 μm of dimethyl silicone polymer fexible film, its can be made preferable
Coordinate with curved surface micropore array mould plate and form lenticule injection molding die cavity under negative pressure；If the thickness of dimethyl silicone polymer fexible film
Thickness is spent, easily causing it, deformation degree is limited and is difficult to form satisfactory lenticule injection molding die cavity under negative pressure；And if
The thickness of dimethyl silicone polymer fexible film is excessively thin, then easily causing it, deformation excessively ruptures under negative pressure.Using spin coating
After method obtains dimethyl silicone polymer fexible film, 20 ~ 30min first preferably is soaked using absolute alcohol, then by poly dimethyl silicon
Oxygen alkane fexible film is taken off from silicon base, is so more conducive to avoid dimethyl silicone polymer fexible film from taking off from silicon base
Crack damage during film.Due to being required for changing an organosilicon fexible film after one curved surface bionic compound eyes of every production, therefore, make
For expendable part, multiple organosilicon fexible films can be prepared with standby；During specific preparation, liquid polydimethylsiloxanes can be utilized
Alkane prepares a big size using spin-coating method（Such as 4 ~ 8 cun）Organosilicon flexible thin-film material's layer, it is then flexible in organosilicon
Cutting obtains multiple organosilicon fexible films on film material plies.
3）Build compound eye mould, the compound eye mould by Die Box device and process before this preparation the curved surface it is micro-
Pore array template and organosilicon fexible film are combined and formed.
The structure of compound eye mould is as shown in Figure 2.The component parts of compound eye mould includes Die Box device 10, curved surface micropore
Array mould plate 20 and organosilicon fexible film 30；Wherein, Die Box device 10 be in advance prepared shaping it is standby, it includes
Casing 11 and case lid 12, hollow chamber of the casing 11 with upper end open, the week side of boss of curved surface micropore array mould plate 20 are hermetically solid
Dingan County is in the side wall of the hollow chamber of casing 1, and the spherical crown planar of curved surface micropore array mould plate 20 is set top down（I.e.
The concave side of curved surface micropore array mould plate is face-up, convex side is set down）, so as to by curved surface micropore array mould plate 20 by casing 1
Hollow chamber be divided into top open space layer and lower section 13 two part of insulating space layer；Organosilicon fexible film 30
Attaching is laid on the concave side of curved surface micropore array mould plate 20, and by each micro lens mould on curved surface micropore array mould plate 20
The sealing of hole 21 covers so that insulating space layer 13 turns into confined space, and the device of casing 11 is additionally provided with and is communicated to casing
The vavuum pump 40 of insulating space layer, to be vacuumized to insulating space layer 13；Case lid 12 is closed to be covered in the upper end of casing 11
In opening, the bottom surface of case lid 12 is dome shape, and when case lid 12 is covered when on casing, the bottom surface and curved surface of its dome shape are micro-
The concave side of pore array template 20 is in sets state with the centre of sphere, and the bottom surface of case lid 12 is laid on curved surface micropore battle array with attaching
Gap is left between organosilicon fexible film 30 on the concave side of row template so that the bottom surface of case lid 12 is flexible with organosilicon
Interval forms injection molding cavity space 14 between film 30, and ventilative through hole 15 and miniflow injection canal 16 are additionally provided with case lid 12,
Ventilative through hole 15 and miniflow injection canal 16 are respectively communicated to two relative positions at the edge of injection molding cavity space 14, and miniflow
Injection canal 16 connects via capillary with a miniflow syringe pump phase 50.
In the compound eye mould thus built, it can be seen that be put into case lid in Die Box device and cover in casing upper end
When in opening, the organosilicon fexible film of laying is attached on curved surface micropore array mould plate and its concave side by Die Box device
The hollow chamber in portion separates for insulating space layer and injection molding cavity space two spaces region, and empty to isolation on the lower
Interbed forms sealing, simultaneously because injection molding cavity space by the top is by the ventilative through hole and external atmosphere pressure on case lid
Communicate, so as to be vacuumized by vavuum pump to insulating space layer to form negative pressure so that curved surface micropore array mould plate
The organosilicon fexible film that laying is attached on concave side corresponds to negative pressure of the opening position by insulating space layer of lenticule nib
Effect and to lower recess, form microlens type injection cavities, and insulating space layer is vacuumized to be formed negative pressure vacuum it is different, then
Organosilicon fexible film corresponds to micro lens mould hole location also can be different by the recessed depth of suction function and curvature.
In compound eye mould, the case lid of Die Box is also one of important component for forming injection molding cavity space, in order to protect
Machining accuracy is demonstrate,proved, case lid is made up preferably with liquid organosilicon of mould reverse mould in Die Box.Micro-streamer on case lid
It is the microchannel that internal diameter size is less than 1000 μm to penetrate passage；And miniflow syringe pump（Also referred to as micro-injection pump）Refer to use micro-pipe
Road（Internal diameter size is 10 ~ 1000 μm）Control fluid is accurate, micro, uniform, the pumping forces instrument that constantly exports, and it can be controlled
Fluid input speed is calculated with milliliter number per hour, maximum 99.9ml/h, minimum 0.1ml/h.Used in compound eye mould
Miniflow injects channel design and miniflow syringe pump, is to inject photosensitive polymerization into injection molding cavity space to more be accurately controlled
Thing prepares the injection rate of curved surface bionic compound eyes, bubble or magazine be present in the curved surface bionic compound eyes for helping preferably to avoid preparing
And influence to prepare quality.
4）The vavuum pump for starting the compound eye mould vacuumizes to insulating space layer, in the insulating space layer of compound eye mould
After the vacuum for reaching setting, photosensitive polymer is filled into the injection molding cavity space of compound eye mould by miniflow syringe pump, treated
Taking-up is stripped after solidification, obtains curved surface bionic compound eyes.
The step is used to prepare curved surface bionic compound eyes to the compound eye mould injecting glue demoulding.Wherein, used photosensitive polymer
Ultra-violet curing light-sensitive emulsion NOA81 or the ultra-violet curing light-sensitive emulsion of other models can be selected, while by miniflow syringe pump to again
The injection rate that photosensitive polymer is filled in the injection cavities room of eye mould is preferably controlled as 80 ~ 150 μ L/min, and is preferably carried out
Amount injection, to ensure to discharge bubble or impurity that may be present in injection cavities room；Ultra-violet curing is filled into injection molding cavity space
After light-sensitive emulsion NOA81, its spontaneous curing can be waited, but in order to accelerate to solidify, shorten the production cycle, for ultra-violet curing
Light-sensitive emulsion NOA81, following ultraviolet light solidification processing mode can be used：Compound eye mould is put into ultra-violet apparatus and carries out purple
Outer photocuring, ultraviolet photoetching power are 200 ~ 400W, and the time for exposure is 1 ~ 2min so that ultra-violet curing light-sensitive emulsion NOA81 consolidates
Change.
It can see by above-mentioned flow, the present invention is based on 3D printing and the formed in mould bionic compound eyes preparation side of negative pressure
Method, the relatively simple compound eye mould injection molding processing mode production curved surface bionic compound eyes of equipment raw material are employed, and due to multiple
Eye mould structure is improved, and passes through Die Box apparatus structure and organosilicon fexible film and curved surface micropore array mould plate phase
Coordinate so that the insulating space layer of compound eye mould can be vacuumized by vavuum pump and curved surface micropore array mould plate it is recessed
The organosilicon fexible film that laying is attached on side corresponds to negative pressure work of the opening position by insulating space layer of lenticule nib
With and to lower recess, microlens type injection cavities are formed；If the diameter of lenticule nib on the curved surface micropore array mould plate used
Size sets difference, the vacuum difference to form negative pressure is vacuumized to insulating space layer, then organosilicon fexible film corresponds to micro-
Lens mould hole location also can be different, and then enable into injection molding cavity space by the recessed depth of suction function and curvature
The lenticule curvature and focal length that injecting glue obtains on curved surface bionic compound eyes are also corresponding different；Thus, using the inventive method
When preparing bionic compound eyes, the different curved surface micropore array mould plate of multiple micro lens mould bore dias and multiple organosilicons can be first prepared
Fexible film, need to change a new organosilicon fexible film after often preparing one curved surface bionic compound eyes of production, if desired give birth to
The curved surface bionic compound eyes of identical lenticule curvature are produced, then the curved surface micropore of identical micro lens mould bore dia is used in compound eye mould
Array mould plate, reach identical vacuum i.e. by controlling vavuum pump to vacuumize the insulating space layer of compound eye mould before injection molding
Can, and producing the curved surface bionic compound eyes of different lenticule curvature if desired, then replacing is different micro- in compound eye mould accordingly
The vacuum that curved surface micropore array mould plate, the adjustment vavuum pump of lens die throat diameter vacuumize to the insulating space layer of compound eye mould
Just can realize, lenticule curvature and focal length on the curved surface bionic compound eyes of production gained can be adjusted flexibly by thus having reached
Purpose, it is achieved thereby that low cost produces the technical goal of the bionic compound eyes product of different lenticule curvature, solve well
Produce the convenience of different lenticule curvature bionic compound eyes products in the prior art and the problem of low cost is difficult to take into account.
Illustrate the inventive method with embodiment below.It should be understood that these embodiments are only used for into one
Step explanation embodiment of the present invention, rather than for limiting the present invention.
Embodiment：
The present embodiment prepares curved surface bionic compound eyes using the inventive method, and preparation flow is as follows：
1）Curved surface micropore array mould plate is prepared using 3D printing technique, curved surface micropore array mould plate is in integrally spherical crown planar, and bent
Row's distribution is arranged according to default compound eye array arrangement density be provided with several micro lens moulds penetrated in the microwell array template of face
Hole.
The present embodiment is prepared for seven different curved surface micropore arrays of micro lens mould bore dia respectively using 3D printing technique
Template, its respective micro lens mould bore dia is respectively 600 μm, 800 μm, 1000 μm, 1200 μm, 1400 μm, 1600 μm, 1800
μm。
2）Organosilicon fexible film is prepared using liquid organosilicon solidification, the entirety of the organosilicon fexible film is big
Small size and the concave side of the curved surface micropore array mould plate match.
Multiple dimethyl silicone polymers are prepared for using the liquid dimethyl silicone polymer of addition curing agent in the present embodiment
Fexible film（Organosilicon fexible film）, meanwhile, vacuumize negative pressure bar for the ease of more different micro lens mould bore dias, difference
Part is uniformly controlled the poly- diformazan of preparation in the present embodiment for the influence situation of the lenticule curvature of the curved surface bionic compound eyes of preparation
Radical siloxane fexible film thickness is 100 μm.
3）It is as shown in Figure 2 using Die Box device, curved surface micropore array mould plate and organosilicon fexible film combination structure
Compound eye mould.
4）The vavuum pump for starting the compound eye mould vacuumizes to insulating space layer, in the insulating space layer of compound eye mould
After the vacuum for reaching setting, photosensitive polymer is filled into the injection molding cavity space of compound eye mould by miniflow syringe pump, treated
Taking-up is stripped after solidification, obtains curved surface bionic compound eyes.
Above-mentioned step 3 is repeated in the present embodiment）~4）Seven preparations, seven curved surface bionic compound eyes, were prepared for seven times
The different curved surface micropore array mould plate structure compound eye mould of above-mentioned seven micro lens mould bore dias is respectively adopted in journey, and controls respectively
Vavuum pump vacuumizes the vacuum for reaching different to insulating space layer, bionical to obtained curved surface then after the injecting glue solidification demoulding
The lenticule height of projection and radius of curvature of compound eye measure, and obtained data are as shown in table 1.
Table 1
It can be seen that in seven curved surface bionic compound eyes of above-mentioned preparation, due to micro- on the curved surface micropore array mould plate of use
The diameter dimension of mirror nib is different, the vacuum difference to form negative pressure is vacuumized to insulating space layer, causes organosilicon flexible thin
Film corresponds to micro lens mould hole location also can be different, therefore the curved surface being prepared by the recessed depth of suction function and curvature
The lenticule height of projection and radius of curvature of bionic compound eyes also differ, each not so as to obtain seven lenticule curvature and focal length
Identical curved surface bionic compound eyes product.Fig. 3 shows the different curved surface bionic compound eyes of 3 be prepared using the inventive method
Product（As numbered in Fig. 3 1., 2., it is 3. shown）Curved surface micropore array mould plate is prepared using 3D printing technique with one（In Fig. 3
Numbering is 4. shown）.Thus also demonstrate that, the inventive method be capable of low cost, easily produce different lenticule curvature it is imitative
Raw compound eye product.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail good embodiment, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent substitution, and without departing from the objective and scope of technical solution of the present invention, it all should cover at this
Among the right of invention.
Claims (9)
1. one kind is based on 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure, it is characterised in that comprises the following steps：
1）Curved surface micropore array mould plate is prepared using 3D printing technique, the curved surface micropore array mould plate is in integrally spherical crown planar,
And arrange row's distribution according to default compound eye array arrangement density on curved surface micropore array mould plate and be provided with the micro- of several insertions
Mirror nib；
2）Organosilicon fexible film, the overall size chi of the organosilicon fexible film is prepared using liquid organosilicon solidification
The very little concave side with the curved surface micropore array mould plate matches；
3）Compound eye mould is built, the compound eye mould is by Die Box device, the curved surface micropore array mould plate and described organic
The combination of silicon fexible film is formed；
The Die Box device includes casing and case lid, and the casing has a hollow chamber of upper end open, and the curved surface is micro-
The week side of boss of pore array template is hermetically fixedly mounted in the side wall of the hollow chamber of the casing, and curved surface micropore array mould plate
Spherical crown planar set top down, so as to by curved surface micropore array mould plate by the hollow chamber of casing be divided into top opening
Space layer and two part of insulating space layer of lower section；The organosilicon fexible film attaches and is laid on the curved surface micropore array
On the concave side of template, and each lenticule nib sealing on curved surface micropore array mould plate is covered so that the isolation
Space layer turns into confined space, and box body device is additionally provided with the vavuum pump for the insulating space layer for being communicated to casing, to
Insulating space layer is vacuumized；The case lid is closed to be covered in the upper end open of casing, and the bottom surface of case lid is dome shape,
When case lid is covered when on casing, the bottom surface of its dome shape is in the concave side of curved surface micropore array mould plate and set with the centre of sphere
State, and the bottom surface of case lid and attaching are laid between the organosilicon fexible film on the concave side of curved surface micropore array mould plate
Leave gap so that be spaced between the bottom surface and organosilicon fexible film of case lid and form injection molding cavity space, on the case lid
Ventilative through hole and miniflow injection canal are provided with, the ventilative through hole and miniflow injection canal are respectively communicated to the injection molding chamber
Two relative positions of spatial edge, and miniflow injection canal is connected via capillary with a miniflow syringe pump；
4）The vavuum pump for starting the compound eye mould vacuumizes to insulating space layer, reaches in the insulating space layer of compound eye mould
After the vacuum of setting, photosensitive polymer is filled into the injection molding cavity space of compound eye mould by miniflow syringe pump, it is to be solidified
Taking-up is stripped afterwards, obtains curved surface bionic compound eyes.
2. 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure are based on according to claim 1, it is characterised in that
The curved surface micropore array mould plate is prepared using the stereolithography apparatus method of 3D printing.
3. 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure are based on according to claim 1, it is characterised in that
The step 2）The middle liquid organosilicon used is added with curing agent, the addition of curing agent for liquid dimethyl silicone polymer
Measure as the 10% ~ 15% of dimethyl silicone polymer quality, the organosilicon fexible film being thus prepared is dimethyl silicone polymer
Fexible film.
4. 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure are based on according to claim 3, it is characterised in that
Spin-coating method is used when preparing dimethyl silicone polymer fexible film, the rotating speed for controlling spin coating instrument is 300 ~ 1000rpm, and is added
Heat cure, heating-up temperature are 60 ~ 80 DEG C, and the heat time is 50 ~ 70min, and the poly dimethyl that thickness is 80 ~ 150 μm is prepared
Siloxanes fexible film.
5. 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure are based on according to claim 4, it is characterised in that
After obtaining dimethyl silicone polymer fexible film using spin-coating method, 20 ~ 30min first is soaked using absolute alcohol, then by poly- diformazan
Radical siloxane fexible film is taken off from spin coating instrument.
6. 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure are based on according to claim 1, it is characterised in that
Case lid in the Die Box device is made up using liquid organosilicon of mould reverse mould.
7. 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure are based on according to claim 1, it is characterised in that
The step 4）In, the injection rate for filling photosensitive polymer into the injection cavities room of compound eye mould by miniflow syringe pump is 80
~150μL/min。
8. 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure are based on according to claim 1, it is characterised in that
The step 4）The middle photosensitive polymer used is ultra-violet curing light-sensitive emulsion NOA81.
9. 3D printing and the formed in mould bionic compound eyes preparation method of negative pressure are based on according to claim 8, it is characterised in that
After ultra-violet curing light-sensitive emulsion NOA81 being filled in by injection molding cavity space of the miniflow syringe pump to compound eye mould, curing process
Concrete mode be：Compound eye mould is put into ultra-violet apparatus progress ultraviolet light solidification, ultraviolet photoetching power is 200 ~
400W, time for exposure are 1 ~ 2min so that ultra-violet curing light-sensitive emulsion NOA81 solidifies.
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