CN101630080A - Electronic control liquid crystal photointerrupter array and preparation method thereof - Google Patents
Electronic control liquid crystal photointerrupter array and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an electronic control liquid crystal photointerrupter array and a preparation method thereof. The electronic control liquid crystal photointerrupter array comprises a glass substrate, an ITO conducting film, a polymer dispersed liquid crystal grating and a driving power source, wherein, the ITO conducting film is coated on the inner surface of the glass substrate, the polymer dispersed liquid crystal grating is arranged between conducting films, and a driving electric field generated by a driving power source is applied to the conducting films. The electronic control liquid crystal photointerrupter array can achieve the function of fast chopping modulation on multipath array input light under different frequencies, and has the characteristics of electric field regulation and control and high response speed; and especially in a corresponding optical experimental system, such as a multi-light-channel and frequency-overlapping Doppler analysis and experiment system, the electronic control liquid crystal photointerrupter array can replace a mechanical rotating disc type photointerrupter in the carrier-frequency modulation of a multichannel carrier fluorescence microscopy imaging signal, thereby having the application characteristics of flexibility, convenience, fastness and practicability.
Description
Technical field
The present invention relates to a kind of field of optoelectronic devices, be specifically related to optical chopper of a kind of hyperchannel holographic grating array based on nanometer polymer dispersed LCD (H-PDLC) material and preparation method thereof.
Background technology
In Experiments of Optics or research, adopt mechanical chopper that light beam is carried out copped wave frequency modulation usually.For example the continuous laser light beam is produced the laser signal of certain frequency by copped wave,, and carry out signal analysis, as the Doppler effect of analyzing photon crystal material etc. the laser beams stack of two bundle different frequencies.Usually, realize that traditional chopper of copped wave function is electronically controlled fan-type vane construction, under certain rotating speed, continuous light is modulated into the periodicity continuous light of certain frequency.Traditional optical chopper time response velocity fails is slow, and the single channel light beam needs a chopper, in the time of for the multichannel light beam frequency modulation can't realize fast, real-time, miniaturization and integrated design.
(holographic polymer dispersed 1iquidcrystal HPDLC) is a kind of sub-information functional material of novel photoelectric that is different from the traditional polymer dispersed liquid crystal material to the nanometer polymer dispersed liquid crystal material.The nanometer polymer dispersed LCD adopts holographic method with polymkeric substance, liquid crystal droplet forms the alternate cycle structure that is rich in polyidal field and is rich in liquid crystal region from mixing state propagate polymerization thing, produce index modulation, this index modulation can change under the electric field regulation and control, therefore can realize functions such as switch exchange.The liquid crystal droplet of nanometer HPDLC material in several nanometers between tens nanometers, incident light to visible light wave range produces scattering and absorption hardly, while diffraction efficiency height, under the effect of surfactant, can effectively reduce driving voltage, improve the driving reaction velocity, and can realize frequency modulation (PFM) by switch regulation and control to diffraction light to incident beam.Therefore, nanometer HPDLC material and device be at diffraction optical element, optic communication device, and there is certain application prospect display device and storage aspect.
Summary of the invention
It is big to The present invention be directed to existing traditional optical chopper volume, and problem of slow response has proposed a kind of electronic control liquid crystal photointerrupter array and method for making, this optical chopper do not have mechanical moving component, reaction velocity fast, be easy to integrated and miniaturization.
Technical scheme of the present invention is: a kind of electronic control liquid crystal photointerrupter array, constitute by the high diffraction nanometer polymer of array dispersed LCD grating device and driving power, the high diffraction nanometer polymer of array dispersed LCD grating device is made up of glass substrate, ITO conducting film, Polymer Dispersed Liquid Crystal grating, the ITO conducting film is coated in the inside surface of glass substrate, the Polymer Dispersed Liquid Crystal grating is between conducting film, and the driving electric field that driving power produces is added on the conducting film.
A kind of electronic control liquid crystal photointerrupter array method for making comprises following concrete steps:
A, two identical ITO electro-conductive glass are etched into array architecture with etching technics, strict mutually insulation between array element, etching is not only removed ITO conducting film partial etching, and go deep into glass substrate 0.5mm, neatly be installed in power supply wiring in the cutting with convenient, then two etchings and the ito glass substrate that installs pilot are aimed at fully, control thickness of liquid crystal box well with spacer, making a thickness again is the liquid crystal cell of the even liquid crystal pre-polymerization potpourri array of 5 μ m～20 μ m;
B, with liquid crystal material, polymer monomer, proper amount of cross-linking agent, activator and initiating agent, Hybrid Heating to 60 under the shading condition～70 ℃, make it be in isotropic state, thereby fully stirring and making its even mixing prepare Polymer Dispersed Liquid Crystal prepolymer composite material with ultrasonic emulsification, calculate by quality ratio in the mixed solution, liquid crystal material accounts for 30%～40%, polymer monomer accounts for 40%～60%, crosslinking chemical accounts for 5%～16%, activator accounts for 6%～12%, and initiating agent accounts for 0.3%～2%; Mixed solution is injected under 60～70 ℃ of conditions in the Polymer Dispersed Liquid Crystal box of sealing all around, when it is cooled to 40～50 ℃, in holographic light path, expose, polymerization reaction take place induces it to be separated, thereby form the holographic polymer dispersed liquid crystal grating, the time shutter is 1min～2min;
C, the chopper array after grating is write solidified 10 minutes under ultraviolet light again, and it is separated fully;
D, chopper array and corresponding power control system are cooperated, connect, realize the automatically controlled copped wave array functional of different frequency.
Described holographic light path is that the Ar ion laser Shu Shouxian of the 514nm that produces of Argon ion laser is after mating plate is adjusted the light intensity energy after filtration, enter unpolarized Amici prism through small holes filtering and colimated light system extender lens again, the plane wave that two-beam equates by force through producing after beam split and the mirror reflects, optical path difference is zero 514nm coherent laser, interfering the plane of exposure exposure to form the automatically controlled optical grating element of HPDLC, the liquid crystal cell Surface Vertical is in the angular bisector direction of two relevant laser during exposure.
Beneficial effect of the present invention is: electronic control liquid crystal photointerrupter array of the present invention and method for making, have the electric field regulation and control, the characteristics that response speed is fast, especially in relevant optics experimental system, as the doppler analysis experimental system of multi-pass and frequency superposed signal, can substitute the optical chopper of mechanical turntable type in the carrier frequency modulation of multichannel carrier frequency fluorescent microscopic imaging signal, therefore have flexibly, convenient, quick and practical application characteristic.
Description of drawings
Fig. 1 prepares 1 * 2 good array structure synoptic diagram of H-PDLC optical chopper array etching for etching method of the present invention;
Fig. 2 prepares the schematic cross-section of the liquid crystal array that H-PDLC optical chopper array makes for etching method of the present invention;
Fig. 3 is the work synoptic diagram of the present invention's 2 * 2 chopper arrays;
Fig. 4 is a Polymer Dispersed Liquid Crystal box structural representation of the present invention;
Fig. 5 makes the light path synoptic diagram of holographic grating for the present invention;
Fig. 6 is Polymer Dispersed Liquid Crystal holographic grating optical modulation mechanism of the present invention not during added electric field, and emergent light is the diffraction state synoptic diagram;
When Fig. 7 applied electric field for Polymer Dispersed Liquid Crystal holographic grating optical modulation mechanism of the present invention, emergent light was the transmissive state synoptic diagram;
Fig. 8 is the automatically controlled diffraction efficiency change curve of H-PDLC grating device of the present invention;
Fig. 9 is the automatically controlled experimental phenomena figure of the present invention;
Figure 10 is driving power circuit figure of the present invention.
Embodiment
Electronic control liquid crystal photointerrupter array is made up of Polymer Dispersed Liquid Crystal (H-PDLC) holographic grating array, driving power source system.
(1) the H-PDLC grating array is that device is arranged and be fixed into to single H-PDLC raster unit according to the needs of practical application.Its characteristics are exactly that single H-PDLC nanometer grating has high-diffraction efficiency (approaching 100%), can realize " 0 ", " 1 " switch, reaction velocity fast (in millisecond or inferior millisecond magnitude).
The material prescription of nanometer polymer dispersed LCD holographic grating need be through optimizing and experiment, usually after fully stirring, be made into the isotropy prepolymer by the liquid crystal material that accounts for general assembly (TW) 30%～50%, 40%～60% polymer monomer, 5%～16% crosslinking chemical, 6%～12% activator, 0.3%～2% initiating agent, be made into uniform liquid crystal cell, in holographic light path, solidify to form then through 1min～2min exposure.
Enforcement example as present patent application, in our breadboard optimization of C, what adopt is 39.9%TEB300 nematic liquid crystal material (inferior king's liquid crystal company of Tsing-Hua University provides), 39.9% EB8301 (U.S. UCB. S.A. (BE) Bruxelles Belgium product) is as prepolymer material, 8% N-vinylpyrrolidone (being called for short NVP) (U.S. Aldrich company product), 12% S-271 activator (U.S. Chemistry company) and 0.2% initiating agent rose bengal (being called for short RB) and N-phenylglycine (abbreviation NPG) (U.S. Aldrich company product) obtain prepolymer after fully mixing, expose in the laser hologram light path of 514nm then.
(2) driving power source system then should be considered the requirement of liquid crystal device to the regulation and control power supply, according to the function of chopper chopping frequency, carries out particular design again.To make output multichannel different frequency, AC power that voltage is adjustable as required.For example, in the optimization and experiment of patent of the present invention, the power drives of HPDLC material can be the sine wave of 1KHz or higher frequency, and the chopping frequency of chopper is 100Hz, and driving voltage is at 100V-300V.Power-supply system is at first produced 1KHz or higher frequency sine wave by signal generator, become the 100Hz pulse train by circuit again, again signal is obtained high voltage output by amplifier.Voltage is applied on the liquid crystal cell, realizes electric field switch regulation and control the HPDLC grating.Be 30KHz as shown in figure 10, the circuit design of 300Hz pulse train, this circuit diagram mainly is made up of multi-resonant oscillating circuit and push-pull circuit that whole ripple mu balanced circuit, NE555 timer constitute.The major function of this circuit is to realize the interchange output of 30KHz, and has the pulsed frequency of 300Hz.Wherein the pulsed frequency of 300Hz is the optical chopper frequency, and 30KHz is the switching voltage requirement that is used to provide the H-PDLC liquid crystal grating, and output voltage is 100V.
(3) scheme of electronic control liquid crystal photointerrupter array making is in the liquid crystal cell set-up procedure, at first two identical ITO electro-conductive glass are etched into array architecture with etching technics, be depicted as one 1 * 2 array structure as accompanying drawing 1,2,1 is insulation gap, 2 is conducting film, 3 is polymer dispersed liquid crystal film, and 4 are the control power supply, strict mutually insulation between array element.Etching is not only removed ITO conducting film partial etching, and gos deep into glass substrate 0.5mm, with convenient power supply wiring neatly is installed in the cutting.Then two etchings and the ito glass substrate that installs pilot are aimed at fully, control thickness of liquid crystal box well with spacer, adopt the automatically controlled chopper of nanometer HPDLC unit method for making to encapsulate the even liquid crystal pre-polymerization potpourri array of 5 μ m～20 μ m again, obtain HPDLC optical chopper array by the single holographic exposure then.
(4) for the different driving power source system of each unit design in the designed H-PDLC array, for example each unit is provided with different frequency of operation as required in 2 * 2 arrays, and power supply design can be as required, can voltage and pulsed frequency adjustable.As shown in Figure 3, it is the work synoptic diagram of 2 * 2 chopper arrays, 52 * 2 holographic polymer dispersed liquid crystal grating array for making, it can realize 4 road incident beams are carried out respectively the modulation of 50Hz, 100Hz, 150Hz and four kinds of different chopping frequencies of 350Hz under the electric field action of control power supply 6.
Making step based on the optical chopper of the hyperchannel holographic grating array of nanometer polymer dispersed LCD (H-PDLC) material is as follows:
A: preparation nanometer polymer dispersed LCD prepolymer material
In the darkroom with the prepolymer monomer, liquid crystal, the light guiding agent, collaborative initiating agent, crosslinking chemical, and chemical substance such as surface activation agent mix according to the mass ratio prescription after optimizing.Concrete material selection, prescription and the certain optimizing process of arts demand specify in the implementation example part.Wherein, the light guiding agent can absorb the energy of specific wavelength laser, produces a large amount of free active populations, and these free active populations and collaborative initiating agent acting in conjunction promote the polymkeric substance polymerization reaction take place, and brings out the phase separation of liquid crystal droplet.Crosslinking chemical also is the optical property improver, can improve HPDLC grating micromechanism pattern, improves the optical property of grating, improves diffraction efficiency, reduces the scattering degree.Slightly surpassing under the liquid crystal clearing point temperature (normally between 62 ℃-65 ℃ with having the ultrasonic emulsification instrument that adds temperature function then, different with cleaning point and different according to selected liquid crystal kind) stir and ultrasonic emulsification at least above two hours, reinjecting, to control thickness well be the ITO conducting film liquid crystal cell of 5 μ m to 20 μ m, liquid crystal cell structure is treated exposure making electrically-controlled liquid crystal chopper unit as shown in Figure 4.
B: holographic grating making
The Polymer Dispersed Liquid Crystal box that completes is placed the exposure of body holographic interference light path.The body holographic light path as shown in Figure 5, the Ar ion laser Shu Shouxian of the 514nm that Argon ion laser 10 produces is after mating plate 11 is adjusted the light intensity energy after filtration, enter unpolarized Amici prism 14 through small holes 12 filtering and colimated light system 13 extender lenses again, through the plane wave that beam split and catoptron 15 reflection backs produce that two-beams equate by force, optical path difference is zero 514nm coherent laser, interfering the plane of exposure exposure to form the automatically controlled optical grating element of HPDLC.The liquid crystal cell Surface Vertical is in the angular bisector direction of two relevant laser during exposure.It is the Argon ion laser of the 514nm of 100mW that LASER Light Source adopts power; In the experiment, the intensity of every Shu Jiguang is about 10mW/cm
2, the time shutter is difference with the difference of polymer dispersed liquid crystal formulations ratio, usually at 60s between the 120s.
C: the making of driving power
When HPDLC electrically-controlled liquid crystal grating is worked as optical chopper, need be at the characteristics of liquid crystal material and the frequency characteristic driving circuit reasonable in design of chopper.The power drives of HPDLC material can be the sine wave of 1KHz or higher frequency, and the chopping frequency of supposing required chopper is 100Hz, and driving voltage is at 100V-300V.Then power-supply system at first can be produced 1KHz or higher frequency sine wave by signal generator, become the 100Hz pulse train by circuit again, again signal be obtained high voltage output by amplifier.Voltage is applied on the liquid crystal cell, realizes electric field switch regulation and control the HPDLC grating.Can consider in addition civil power is carried out the rectifying and wave-filtering step-down by electric capacity, bridge circuit and stabilivolt, remove to control two 555 timers with such voltage again and export required frequency, and then carry out the integration of frequency with triode, form the function of recommending transformation with metal-oxide-semiconductor and transformer at last, centre tap at transformer is partly imported needed magnitude of voltage, the variation of voltage is by using single-chip microcomputer, and the adjustment that bidirectional triode thyristor and photoelectrical coupler carry out voltage reaches necessary requirement.Be output 30KHz as shown in Figure 10, the circuit design drawing of 300Hz pulse train.Output voltage can change with the variation of input voltage and reaches designing requirement.
D: the making of electrically-controlled liquid crystal array chopper
The method of making electronic control liquid crystal photointerrupter array is in the liquid crystal cell set-up procedure, at first two identical ITO electro-conductive glass is etched into array architecture with etching technics, as shown in Figure 3, and strict mutually insulation between array element.Etching is not only removed ITO conducting film partial etching, and gos deep into glass substrate 0.5mm, with convenient power supply wiring neatly is installed in the cutting.Then two etchings and the TTO glass substrate that installs pilot are aimed at fully, control thickness of liquid crystal box well with spacer, adopt the even liquid crystal pre-polymerization potpourri array of the unit method for making encapsulation 5-20 micron in the steps A again, obtain HPDLC optical chopper array by a holographic exposure again.
E: the realization of electrically-controlled liquid crystal array chopper
The chopper array is cooperated, is connected with corresponding power control system, realize the automatically controlled copped wave array functional of different frequency.It shown in the accompanying drawing 3 the work synoptic diagram of 2 * 2 LCD electric-controlled choppers.Realize 50HZ, 100HZ, the quick while copped wave of four kinds of different chopping frequencies of 150HZ and 350HZ with this device.
The Polymer Dispersed Liquid Crystal box is by glass substrate 7 as shown in Figure 4, is coated in ITO conducting film 8 on the glass substrate and middle polymer dispersed liquid crystal film 9 and forms.The thickness of polymer dispersed liquid crystal film need be controlled between 5 μ m～20 μ m by spacer, will respectively expose an electrode at two ends simultaneously in the process of making, so that apply electric field to liquid crystal cell.
Shown in Fig. 6,7,17 is prepolymer and monomer molecule in the polymer dispersion liquid crystal material, and 18 for existing liquid crystal droplet wherein, and 19 is incident light, and 20 is emergent light.Do not having under the situation of driving electric field as shown in Figure 6, polymkeric substance and liquid crystal have formed light and dark optical grating construction, therefore have incident light by the time diffraction phenomena can take place; After adding driving electric field, the refractive index of liquid crystal and the refractive index of polymkeric substance are complementary as shown in Figure 7, so just diffraction phenomena can not take place, all transmissions of incident light.
Make optical chopper array process:
A: at first prepare two glass substrates that scribble the ITO conducting film, the polymer dispersion liquid crystal material that is coated with last layer 5 μ m～20 μ m between glass substrate is as recording layer, and concrete structure as shown in Figure 4.Wherein, polymer dispersion liquid crystal material is through fully stirring back formation by the initiating agent (comprise coinitiator and photoinitiator, both mass ratioes are 5: 2) that accounts for general assembly (TW) 39.9% liquid crystal material, 39.9% polymer monomer, 8% crosslinking chemical, 12% activator and 0.2%.Liquid crystal is the TEB300 liquid crystal (n that is provided by inferior princes and dukes department of Beijing Tsing-Hua University
e=1.679, Δ n=0.168), polymer monomer is EB8031 (being provided by U.S. UCB. S.A. (BE) Bruxelles Belgium), cross-linking monomer is that N-vinylpyrrolidone (NVP) is provided by Sigma-Aldrich company, its effect is the size that reduces liquid crystal droplet in the holographic polymer dispersed liquid crystal grating, improves the performance of liquid crystal grating; The S-271 that surfactant selects for use ChemService company to provide, its effect is the driving voltage that reduces liquid crystal grating; Coinitiator is N-phenylglycine (NPG), and photoinitiator is rose bengal (RB), and these two kinds of initiating agents all are to be provided by Sigma-Aldrich company, promotes polymer dispersion liquid crystal material generation polymerization, and has determined polymerization speed.The mass ratio of these materials has determined the diffraction efficiency of liquid crystal grating and the size of drive threshold voltage; In addition, the thickness of polymer dispersed liquid crystal film is big or small influential to diffraction efficiency and threshold voltage also, thereby influenced the performance of optical chopper.The big I of threshold voltage is expressed as:
Wherein, d is the thickness of polymer dispersed liquid crystal film, and r is the radius of pre-polymerization species liquid crystal droplet, and K is the elasticity coefficient of liquid crystal, ε
0Be permittivity of vacuum, Δ ε is the dielectric anisotropy of liquid crystal,
Be liquid crystal droplet the ratio of width to height (a, b are respectively the length of the major axis and the minor axis of oval droplet).
B: according to the laser hologram light path of building shown in Figure 5, light source is that the wavelength that Argon ion laser sends is the green glow of 514nm, and the angle between the two bundle coherent lights is θ, changes the value of θ, and the spatial frequency of gained grating also can change thereupon.In this light path, the spatial frequency of preparation gained grating can be expressed as:
In the experiment, the intensity of laser is adjusted into 12mW/cm
2About, the time shutter is difference with the difference of polymer dispersed liquid crystal formulations ratio, usually at 30s between the 5min; The size and the length of time shutter of exposure light intensity can influence grating diffration efficient.Through a large amount of experiments, the grating diffration efficient of gained was best when the material time shutter used herein was 90s.Single like this holographic polymer dispersed liquid crystal grating has just been made, and its structure as shown in Figure 6.
As shown in table 1, at liquid crystal content is 39.9%, polymer monomer content is 39.9%, content of crosslinking agent is 8%, activator content is 12%, and initiator content is 0.2%, the Polymer Dispersed Liquid Crystal holographic grating of preparation when solidification temperature is 35 ℃ to 50 ℃, the threshold voltage of this holographic grating is approximately 10V, and the high energy of diffraction efficiency reaches about 60%.The material for preparing under this kind condition can reach electro-optical characteristic preferably, can provide good material support for the PDLC device, can satisfy the requirement that optical chopper is modulated light beam substantially.As yet not under the optimization situation fully, shown in the situation of change table 1 of more typical automatically controlled diffraction efficiency and the accompanying drawing 8.Accompanying drawing 9 is experimental phenomena figure, and it has shown the unit pictorial diagram of liquid crystal grating.
The automatically controlled information slip of table 1H-PDLC grating device
| Institute's making alive (V) | ??0 | ??10 | ??15 | ??20 | ??25 | ??30 | ??35 | ??40 | ??45 |
| Diffraction efficiency (%) | ??57.6 | ??56.5 | ??54.6 | ??51.1 | ??44.7 | ??36.7 | ??25.6 | ??19.7 | ??15.1 |
| Institute's making alive (V) | ??50 | ??55 | ??60 | ??65 | ??70 | ??80 | ??90 | ??100 | |
| Diffraction efficiency (%) | ??12.5 | ??9.4 | ??8.5 | ??7.5 | ??6.8 | ??5.9 | ??4.9 | ??4.2 |
C: the circuit diagram of driving power as shown in figure 10.This electric power output voltage is 100V, and modulating frequency is the alternating current of 300Hz.Print pcb board according to circuit diagram shown in Figure 10, and then require among the selection figure electronic devices and components carry out the element welding, welding is finished the back and is tested errorless getting final product.
D: make the optical chopper array, scheme is as follows:
At first two identical ITO electro-conductive glass are etched into array architecture with etching technics, strict mutually insulation between array element.Etching is not only removed ITO conducting film partial etching, and gos deep into glass substrate 0.5mm, with convenient power supply wiring neatly is installed in the cutting.Then two etchings and the ito glass substrate that installs pilot are aimed at fully, control thickness of liquid crystal box well with spacer, adopt the even liquid crystal pre-polymerization potpourri array of the unit method for making encapsulation 5-20 micron among the step B again, obtain HPDLC optical chopper array by a holographic exposure again.Being one as shown in Figure 2 uses etching method to prepare H-PDLC optical chopper array.
This scheme can obtain required optical chopper array by single exposure, particularly under the many more situations of number of arrays, this advantage is more obvious, for example for 4 * 4 arrays, generally need 16 common single channel mechanical choppers, and this scheme only needs single exposure, has improved make efficiency like this, reduced cost, be easier to integrated.
Claims (3)
1, a kind of electronic control liquid crystal photointerrupter array, constitute by the high diffraction nanometer polymer of array dispersed LCD grating device and driving power, the high diffraction nanometer polymer of array dispersed LCD grating device is made up of glass substrate, ITO conducting film, Polymer Dispersed Liquid Crystal grating, it is characterized in that, the ITO conducting film is coated in the inside surface of glass substrate, the Polymer Dispersed Liquid Crystal grating is between conducting film, and the driving electric field that driving power produces is added on the conducting film.
2, a kind of electronic control liquid crystal photointerrupter array method for making comprises following concrete steps:
A, two identical ITO electro-conductive glass are etched into array architecture with etching technics, strict mutually insulation between array element, etching is not only removed ITO conducting film partial etching, and go deep into glass substrate 0.5mm, neatly be installed in power supply wiring in the cutting with convenient, then two etchings and the ito glass substrate that installs pilot are aimed at fully, control thickness of liquid crystal box well with spacer, making a thickness is the liquid crystal cell of the even liquid crystal pre-polymerization potpourri array of 5 μ m～20 μ m;
B, with liquid crystal material, polymer monomer, proper amount of cross-linking agent, activator and initiating agent, Hybrid Heating to 60 under the shading condition～70 ℃, make it be in isotropic state, thereby fully stirring and making its even mixing prepare Polymer Dispersed Liquid Crystal prepolymer composite material with ultrasonic emulsification, calculate by quality ratio in the mixed solution, liquid crystal material accounts for 30%～40%, polymer monomer accounts for 40%～60%, crosslinking chemical accounts for 5%～16%, activator accounts for 6%～12%, and initiating agent accounts for 0.3%～2%; Mixed solution is injected under 60～70 ℃ of conditions in the Polymer Dispersed Liquid Crystal box of sealing all around, when it is cooled to 40～50 ℃, in holographic light path, expose, polymerization reaction take place induces it to be separated, thereby form the holographic polymer dispersed liquid crystal grating, the time shutter is 1min～2min;
C, the chopper array after grating is write solidified 10 minutes under ultraviolet light again, and it is separated fully;
D, the chopper array is cooperated, is connected with corresponding power control system, the automatically controlled copped wave array functional of realization different frequency.
3, according to the described electronic control liquid crystal photointerrupter array method for making of claim 2, it is characterized in that, described holographic light path is that the Ar ion laser Shu Shouxian of the 514nm that produces of Argon ion laser is after mating plate is adjusted the light intensity energy after filtration, enter unpolarized Amici prism through small holes filtering and colimated light system extender lens again, equate by force through producing two-beam after beam split and the mirror reflects, optical path difference is the plane wave of zero 514nm coherent laser, interfering the plane of exposure exposure to form the automatically controlled optical grating element of HPDLC, the liquid crystal cell Surface Vertical is in the angular bisector direction of two relevant laser during exposure.
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| CN111487802A (en) * | 2019-01-28 | 2020-08-04 | 北京纳米能源与系统研究所 | Self-driven optical switch and wireless sensing system |
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| CN102354046A (en) * | 2011-07-04 | 2012-02-15 | 上海理工大学 | Method for realizing multichannel frequency division multiplexing fluorescence confocal microscopic imaging technique |
| CN104076424A (en) * | 2014-07-28 | 2014-10-01 | 上海交通大学 | Holographic PDLC (polymer dispersed liquid crystal) raster and preparation method thereof |
| CN104238166A (en) * | 2014-10-20 | 2014-12-24 | 南京华日触控显示科技有限公司 | LCD module and method for improving interference resistance of LCD |
| CN109633918A (en) * | 2019-01-11 | 2019-04-16 | 浙江大学 | Time division multiplexing 3D glasses based on holographic polymer dispersed liquid crystal grating |
| CN111487802A (en) * | 2019-01-28 | 2020-08-04 | 北京纳米能源与系统研究所 | Self-driven optical switch and wireless sensing system |
| CN111487802B (en) * | 2019-01-28 | 2022-10-04 | 北京纳米能源与系统研究所 | Self-driven optical switch and wireless sensing system |
| CN112885497A (en) * | 2021-01-22 | 2021-06-01 | 散裂中子源科学中心 | Water-cooling system of heat load chopper |
| CN115857178A (en) * | 2023-03-01 | 2023-03-28 | 南昌虚拟现实研究院股份有限公司 | Holographic optical waveguide lens and preparation method thereof |
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