CN103853394A - Night-vision compatible infrared touch screen adopting induced transmission filter plate - Google Patents
Night-vision compatible infrared touch screen adopting induced transmission filter plate Download PDFInfo
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- CN103853394A CN103853394A CN201410055310.3A CN201410055310A CN103853394A CN 103853394 A CN103853394 A CN 103853394A CN 201410055310 A CN201410055310 A CN 201410055310A CN 103853394 A CN103853394 A CN 103853394A
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- induced transmission
- infrared touch
- transmission filters
- night
- touch panel
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Abstract
The invention relates to a night-vision compatible infrared touch screen adopting an induced transmission filter plate. The night-vision compatible infrared touch screen comprises a 940nm LED (light emitting diode) transmitting tube and a light sensing detector, and the night-vision compatible infrared touch screen is characterized in that the induced transmission filter plate which can completely absorb and reflect light except the light of 930 to 950nm is mounted on the surface of the LED transmitting tube and the light sensing detector and is of a multi-layer metal-containing structure. The radiation of the night-vision compatible infrared touch screen can meet the night-vision compatible requirement, the interference of the visible light and infrared light of the environment on an infrared detector of the touch screen can be prevented, the signal-to-noise ratio of a system can be improved, the system power consumption can be reduced, and the difficulty in software control can be alleviated.
Description
Technical field
The present invention relates to a kind of infrared touch panel, especially a kind of night viewing compatible infrared touch panel, specifically a kind of night viewing compatible infrared touch panel that adopts Induced Transmission Filters.
Background technology
At present, infrared touch panel is more and more applied in liquid crystal ruggedized monitor system, and to facilitate pilot to the obtaining and controlling of relevant information, its night viewing compatible characteristic should strictly meet index request.And wherein the LED lantern festival of infrared touch panel gives off the detectable light wave of photocathode in image intensifier, disturb the overall performance of NVIS, when serious, can make pilot produce dazzle texts.In order to improve the night viewing compatible performance of infrared touch panel, there is unit to adopt on the lens before LED light source and smear one deck absorption near infrared light, improve the performance of its night viewing compatible.But through test, the optical filter of this dye form can not end completely near infrared light, still have the light-wave transmission of part night viewing compatible out, and this optical filter can there is serious absorption to the wave band of LED radiation, promote like this power consumption of whole infrared touch panel.In order to improve the night viewing compatible performance of infrared touch panel, and reduce the power consumption of whole system, the present invention adopts a kind of Induced Transmission Filters containing Au, be applied to the LED light source of 940nm, both guaranteed the night viewing compatible performance of whole system, reduce again the interference of surround lighting to infrared eye, the light of 940nm has been had to more than 65% transmission simultaneously, reduced the overall power of infrared touch panel.
Summary of the invention
The object of the invention is the poor anti jamming capability and the large problem of power consumption that exist for existing night viewing compatible infrared touch panel, design a kind of antijamming capability strong, the night viewing compatible infrared touch panel of the employing Induced Transmission Filters that power consumption is little.
One of technical scheme of the present invention is:
A kind of night viewing compatible infrared touch panel that adopts Induced Transmission Filters, it comprises 940nmLED power valve and sensitive detector, it is characterized in that, at the surface label of described LED power valve and sensitive detector, the metallic Induced Transmission Filters of multilayer that the light except 930-950nm all can be absorbed and reflects is housed.
Two of technical scheme of the present invention is:
A kind of night viewing compatible infrared touch panel that adopts Induced Transmission Filters, it comprises LED power valve and sensitive detector, it is characterized in that at the vertical metallic Induced Transmission Filters of multilayer that the light except 940nm all can be absorbed and reflects of laying in the dead ahead of described LED power valve and sensitive detector.
The metallic Induced Transmission Filters of described multilayer contains two-layer Au metal material layer, and it is deposited and form in quartz glass substrate by thermal evaporation, and centre wavelength is 940nm, and half-wave is wide is 20nm, and total geometric thickness is 1500nm.
The metallic Induced Transmission Filters of described multilayer can response wave band to NVIS cut-off degree of depth maximal value be 3OD.
The preparation method of the described metallic Induced Transmission Filters of multilayer is: select quartz as base material, be coated with before film the alcohol that is 1:1 by volume ratio and the mixed liquor of ether it is cleaned, then put it in plasma clean machine, pass into O
2adopt the radio frequency plasma of 600W to carry out physics, chemistry bombardment to the surface of quartz glass, improve its surfactivity, after having cleaned, base material is put into electron beam evaporation deposition machine, adopt the direct monitoring technique of single wavelength, preparing centre wavelength is 940nm, and half-wave is wide is 20nm Induced Transmission Filters.
Beneficial effect of the present invention:
The present invention contains the Induced Transmission Filters of golden membranous layer by employing, the emission spectrum of infrared touch panel LED light source, from 200-930nm and 950-1200nm cut-off, has been improved to the performance of overall night viewing compatible.The electron-beam vapor deposition method of using plasma assistant depositing is prepared this optical filter, has improved compactness extent and the adhesion of film.The optical filter preparing can directly be placed with in infrared LED and infrared eye front.
The present invention has simple in structure, and scheme is flexible, is specially adapted to the night viewing compatible of infrared touch panel.
External radiation energy of the present invention meets night viewing compatible requirement, can prevent the interference of visible ray and the infrared eye of near infrared light to touch-screen of environment simultaneously, and the signal to noise ratio (S/N ratio) of the high system of energy, reduces system power dissipation, reduces the difficulty of software control.
Accompanying drawing explanation
Fig. 1 is the spectrogram of Induced Transmission Filters of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1.
A kind of night viewing compatible infrared touch panel that adopts Induced Transmission Filters, it comprises 940nmLED power valve and sensitive detector, the physical construction of night viewing compatible infrared touch panel is same as the prior art, key of the present invention is to be equipped with and can to absorb with the metallic Induced Transmission Filters of multilayer of reflection or at the vertical metallic Induced Transmission Filters of multilayer that the light except 940nm all can be absorbed and reflects of laying in the dead ahead of described LED power valve and sensitive detector whole the light except 930-950nm at the surface label of described LED power valve and sensitive detector.
And also identical with traditional Induced Transmission Filters as the physical construction of the metallic Induced Transmission Filters of multilayer of gordian technique of the present invention, its key is the design of centre wavelength and the innovation of interlayer structure and manufacture method.
Traditional Induced Transmission Filters design, its centre wavelength transmitance is not high enough, and this optical filter is applied in product and easily makes signal light intensity decay, can not meet the demands.In order to improve centre wavelength transmitance, the present invention adopts gold (Au) as the metal material of Induced Transmission Filters and designs the golden Induced Transmission Filters that contains that centre wavelength is 940nm.Select traditional Induced Transmission Filters as initial configuration, first carry out global optimization by genetic algorithm, then use L-M method (the method is conventional known technology) to carry out local optimum, obtain final film structure, its spectrogram as shown in Figure 1.Total rete number is 20 layers, and containing two-layer gold, total geometric thickness is 1500nm.Media coating material selection TiO
2and SiO
2, due to SiO
2possesses good wear-resisting and corrosion resistance, by SiO
2design is at the outermost layer of film.
Select quartz as base material, be coated with film and with the mixed liquor of alcohol and ether, it cleaned before, then put it in plasma clean machine, pass into O
2, adopt the radio frequency plasma of 600W to carry out physics, chemistry bombardment to the surface of quartz glass, improve its surfactivity.After having cleaned, base material is put into electron beam evaporation deposition machine, adopt the direct monitoring technique of single wavelength, prepare high-quality Induced Transmission Filters, its passband is 930-950nm, and mean transmissivity reaches more than 60%, and cutoff wavelength is from 200-1200nm.By the optical filter cut growth strip preparing, be placed with on infrared LED and infrared eye surface, be provided with at LED light source under the prerequisite of collimating mirror, the front that also the metallic Induced Transmission Filters of multilayer of preparing, cutting can be placed on to collimating mirror, makes compatible Class B (white) reach 6*10
-10~ 1*10
-9w/cm
2sr@0.5fL.
The part that the present invention does not relate to all prior art that maybe can adopt same as the prior art is realized.
Claims (5)
1. one kind adopts the night viewing compatible infrared touch panel of Induced Transmission Filters, it comprises 940nmLED power valve and sensitive detector, it is characterized in that, at the surface label of described LED power valve and sensitive detector, the metallic Induced Transmission Filters of multilayer that the light except 930-950nm all can be absorbed and reflects is housed.
2. one kind adopts the night viewing compatible infrared touch panel of Induced Transmission Filters, it comprises LED power valve and sensitive detector, it is characterized in that at the vertical metallic Induced Transmission Filters of multilayer that the light except 940nm all can be absorbed and reflects of laying in the dead ahead of described LED power valve and sensitive detector.
3. night viewing compatible infrared touch panel according to claim 1 and 2, it is characterized in that the described metallic Induced Transmission Filters of multilayer contains two-layer Au metal material layer, it is deposited and forms in quartz glass substrate by thermal evaporation, centre wavelength is 940nm, half-wave is wide is 20nm, and total geometric thickness is 1500nm.
4. night viewing compatible infrared touch panel according to claim 1 and 2, is characterized in that the cut-off degree of depth maximal value that the described metallic Induced Transmission Filters of multilayer can response wave band to NVIS is 3OD.
5. night viewing compatible infrared touch panel according to claim 1 and 2, the preparation method who it is characterized in that the described metallic Induced Transmission Filters of multilayer is: select quartz as base material, being coated with before film the alcohol that is 1:1 by volume ratio and the mixed liquor of ether cleans it, put it into again in plasma clean machine, pass into O
2adopt the radio frequency plasma of 600W to carry out physics, chemistry bombardment to the surface of quartz glass, improve its surfactivity, after having cleaned, base material is put into electron beam evaporation deposition machine, adopt the direct monitoring technique of single wavelength, preparing centre wavelength is 940nm, and half-wave is wide is 20nm Induced Transmission Filters.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410055310.3A CN103853394A (en) | 2014-02-19 | 2014-02-19 | Night-vision compatible infrared touch screen adopting induced transmission filter plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410055310.3A CN103853394A (en) | 2014-02-19 | 2014-02-19 | Night-vision compatible infrared touch screen adopting induced transmission filter plate |
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| CN103853394A true CN103853394A (en) | 2014-06-11 |
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| CN201410055310.3A Pending CN103853394A (en) | 2014-02-19 | 2014-02-19 | Night-vision compatible infrared touch screen adopting induced transmission filter plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110955358A (en) * | 2019-11-25 | 2020-04-03 | 中国电子科技集团公司第五十五研究所 | Night vision compatible infrared touch screen of infrared emission laser diode |
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| US20080117358A1 (en) * | 2006-11-21 | 2008-05-22 | Maner Randy M | Spectrally controlled display backlight emissions for night vision imaging system compatibility |
| CN101261333A (en) * | 2008-04-03 | 2008-09-10 | 浙江大学 | Metal medium period film constitutive omni- angle transmission filters |
| CN201226147Y (en) * | 2008-01-08 | 2009-04-22 | 北京汇冠新技术有限公司 | Translucent window for infrared touch screen |
| CN201812048U (en) * | 2010-08-23 | 2011-04-27 | 蒋丰 | Double-light source infrared touch screen optical reflective film |
| CN102830854A (en) * | 2011-06-01 | 2012-12-19 | 泰勒斯公司 | Touch system with optical transmitters and receivers |
| CN103513827A (en) * | 2012-06-29 | 2014-01-15 | 北京汇冠新技术股份有限公司 | Infrared touch screen scan method and infrared touch screen |
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2014
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080117358A1 (en) * | 2006-11-21 | 2008-05-22 | Maner Randy M | Spectrally controlled display backlight emissions for night vision imaging system compatibility |
| CN201226147Y (en) * | 2008-01-08 | 2009-04-22 | 北京汇冠新技术有限公司 | Translucent window for infrared touch screen |
| CN101261333A (en) * | 2008-04-03 | 2008-09-10 | 浙江大学 | Metal medium period film constitutive omni- angle transmission filters |
| CN201812048U (en) * | 2010-08-23 | 2011-04-27 | 蒋丰 | Double-light source infrared touch screen optical reflective film |
| CN102830854A (en) * | 2011-06-01 | 2012-12-19 | 泰勒斯公司 | Touch system with optical transmitters and receivers |
| CN103513827A (en) * | 2012-06-29 | 2014-01-15 | 北京汇冠新技术股份有限公司 | Infrared touch screen scan method and infrared touch screen |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110955358A (en) * | 2019-11-25 | 2020-04-03 | 中国电子科技集团公司第五十五研究所 | Night vision compatible infrared touch screen of infrared emission laser diode |
| CN110955358B (en) * | 2019-11-25 | 2022-08-05 | 中国电子科技集团公司第五十五研究所 | Night vision compatible infrared touch screen of infrared emission laser diode |
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Application publication date: 20140611 |