CN1059069C - Infrared sensor with 10.6 um orange light output - Google Patents
Infrared sensor with 10.6 um orange light output Download PDFInfo
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- CN1059069C CN1059069C CN 94112051 CN94112051A CN1059069C CN 1059069 C CN1059069 C CN 1059069C CN 94112051 CN94112051 CN 94112051 CN 94112051 A CN94112051 A CN 94112051A CN 1059069 C CN1059069 C CN 1059069C
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- ceramic chip
- infrared
- sensing element
- alkaline earth
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Abstract
The present invention relates to an infrared sensing element outputting 10.6 micrometers of orange light, which is a thermoluninescent material and is mainly used for converting 10.6 mu m infrared light output by a CO2 laser to orange visible light. The present invention is composed of a ceramic chip formed by burning a multiple compound. The main chemical component forming the ceramic chip compound is alkaline earth sulphides in which two kinds of rare earth ions are mixed, wherein one is europium, and the other one is dysprosium, holmium and erbium. Simultaneously, a proper amount of fluorinating alkali, alkaline earth fluoride and sulfate are added, which is favorable for enhancing the luminous intensity. The infrared sensing element of the present invention has the advantages of high sensitivity, high heat resistance, high mechanical strength, no pollution, etc. and is favorable for photography, photoelectric record and observation.
Description
The present invention is a kind of infrared sensor with the thermoluminescence material, and it is to be used for CO
2Laser converts the sensing element of visible orange coloured light in the infrared output of 10.6 μ m.
The IIa-VIb compounds of group that mixes, have good photoluminescence property. have darker trap in these materials, trapped electron that can be stable, and just think just can cause luminescence generated by light with near infrared light (λ ∠ 1.7 μ m), this phenomenon [is seen U.S. Pat 4806772 (HO5B33/00) with the infrared sensing element that relevant material has been used to make the near infrared light response, US4812659 (HO5B33/00), US4812660 (HO5B33/00)].
But the alkaline earth sulfide of some doping and selenides have thermoluninescent characteristic, yet in the ordinary course of things, its application is out in the cold.Under special process conditions and chemical composition, autotelicly in material, change composition and mix special impurity, introduce the trap of some appropriate depth, can make it under the heat effect of LONG WAVE INFRARED light, produce visible electronics-hole recombination luminescence.Like this, this visible light just becomes the demonstration that acts on the infrared light on the material.Utilize this thermo-sensitive material to make and be fit to many-sided infrared sensing element of using, for example be used to detect CO
2The range estimation element that laser is exported at 10.6 μ m, the infrared display screen of seeing spectrometer, the picture conversion screen of infrared interferometer etc.
What main purpose of the present invention provided a kind of thermoluninescent good heat resistance can be with CO
2Laser converts the infrared sensing element of salmon pink visible light in the infrared output of 10.6 μ m; And this element is provided and constitutes the chemical composition and the preparation method of the material of this element.
Infra-red heat photosensitive elements of the present invention is made of the ceramic chip of difformity that is fired into and different size.This pottery sheet at high temperature sinters into after under high pressure raw material being shaped.This ceramic chip has certain intensity can be contained on the special framework, or on the sintered metal sheet or on other potsherd.
Constitute the ceramic chip of infrared sensor, manufacture by special infrared sensing material.This material is to constitute (piece, powder) by multi-element compounds.Its matrix components is an alkaline earth sulfide, is doping to be divided into special impurity, and it determines properties of materials, and forms other additive (alkaline-earth sulfate, alkali halide, alkali-earth halide etc.) of ceramic chip.Main matrix composition alkaline earth sulfide, before not adding other composition, it does not have any available characteristic.Mix europium into and obtained the characteristic of luminescence generated by light, and the characteristic of mixing the luminescence generated by light that has destroyed europium of second kind of impurity (erbium, holmium, dysprosium and thulium), and strengthened the thermoluminescence characteristic.
The main component of the ceramic chip material therefor of element of the present invention is an alkaline earth sulfide, wherein is mixed with two kinds of rare earth ions, and a kind of is europium, and another kind is a dysprosium, and holmium or erbium etc. add an amount of alkali fluoride simultaneously, and alkaline earth fluoride and sulfate etc. are to increase luminous intensity.Rare earth ion can be an oxide, or sulfide or the adding of halid form.Each constituent content percentage is as follows in its material:
SrS 85～89.2％ wt
M(Ca，Sr，Ba)SO
4 1.74～8.92％ wt
M(Ca，Sr，Ba)F
2 0～7％ wt
N(Li，Na，K)F 0.85～4.35％ wt
Eu
2O
3 0.017～0.07％ wt
R(Er，Ho，Dy，)
2O
3?0.002～0.035％?wt
The preparation method of infrared sensing element of the present invention:
The compound of above-mentioned ceramic chip is weighed up mixing by required ratio, grind back press molding in the substrate of various sizes and shape, be placed on afterwards in the electric furnace, under inert atmosphere, heat, kept 0.5～2 hour in 1000-1250 ℃ of temperature, promptly get the ceramic chip of element of the present invention after the cooling.
Said substrate can be the mould of various shapes or size, or sheet metal, or alumina ceramic plate.
The above-mentioned element that makes can be contained on the suitable framework so that use according to different needs.
Advantage of the present invention:
Element of the present invention is made by inorganic ceramic material, is characterized in LONG WAVE INFRARED light (CO
2Laser output-10.6 μ m) convert the salmon pink visible light to, its spectral distribution as shown in Figure 1, thereby it has following advantage:
1. highly sensitive;
2. be beneficial to photograph, photoelectric recording and observation;
3. good heat resistance;
4. mechanical strength height;
5. pollution-free, etc.
6. the main use of element of the present invention is wider:
1) is used for observing CO
2Laser output (wavelength is 10.6 μ m) is determined the orientation, hot spot
Size and disperse situation etc.
2) be used for as Analysis for CO
2Laser is exported the infrared ripple of seeing spectrometer of meticulous wavelength
Long display screen.
3) be used to be observation CO
2The screen of laser interference image etc.
4) be used for CO
2The location of laser surgey or lasing safety.
Description of drawings:
Fig. 1. luminescent spectrum distribution map (ordinate is luminous intensity I, and abscissa is a wavelength X).
Embodiment 1:
Make the material of element ceramic chip of the present invention by following composition, its each constituent content percentage is:
Strontium sulfide 85% wt
Calcirm-fluoride 3.4% wt
Lithium fluoride 0.85% wt
Sodium fluoride 4.3% wt
Europium oxide 0.04% wt
Dysprosia 0.002% wt
Concrete way is to take by weighing strontium sulfide 13370mg, calcium sulfate 935.9mg, calcirm-fluoride 534.8mg, lithium fluoride 133.7mg, sodium fluoride 668.5mg, europium oxide 6mg and dysprosia 0.53mg, after grinding well, mixing is placed on press molding in the special mould, be placed on then in the electric furnace, under 1000 ℃ of temperature, burnt 2 hours, logical simultaneously argon gas.Can get thermoluminescence infrared sensing element of the present invention after the cooling.Its luminescent spectrum is shown in curve among Fig. 12.
Embodiment 2:
The content percentage of each compound of ceramic chip material is:
Strontium sulfide 89.2% wt
Barium sulfate 8.92% wt
Potassium fluoride 1.78% wt
Europium oxide 0.07% wt
Holimium oxide 0.035% wt
Concrete way is to take by weighing strontium sulfide 7866mg, barium sulfate 786.6mg, potassium fluoride 157.32mg, europium oxide 6.3mg and holimium oxide 3.1mg are deposited on aluminium flake and the potsherd after mixing grinds well, and are placed in the electric furnace then, under 1250 ℃ of temperature, burnt 0.5 hour logical simultaneously argon gas.Can get thermoluminescence display screen of the present invention after the cooling.Its luminescent spectrum is shown in curve among Fig. 13.
Embodiment 3:
The content percentage of each compound of ceramic chip material is:
Strontium sulfide 86.9% wt
Strontium sulfate 1.74% wt
Barium fluoride 6.95% wt
Lithium fluoride 4.35% wt
Europium oxide 0.017% wt
Erbium oxide 0.017% wt
Concrete way is to take by weighing strontium sulfide 8582.6mg, strontium sulfate 171.65mg, barium fluoride 686.6mg, lithium fluoride 429.13mg, europium oxide 1.7mg and erbium oxide 1.7mg are placed on press molding in the special mould after mixing grinds well, and are placed in the electric furnace then, under 1050 ℃ of temperature, burnt 1 hour, feed argon gas simultaneously.Promptly get thermoluminescence potsherd of the present invention after the cooling, its luminescent spectrum is shown in curve among Fig. 11.
Claims (1)
- One kind output orange light 10.6 microns infrared sensing elements, the ceramic chip that it is characterized in that constituting sensing element is that the material that is made of multi-element compounds is fired and formed, (by weight percentage) contains 85～89.2% SrS in the multi-element compounds, 1.74～8.92% MSO 4, 0～7% MF 2, 0.85～4.35% NF, 0.017～0.07 Eu 2O 3With 0.002～0.035% R 2O 3, above-mentioned M is Ca, or Sr, or Ba; N is Li, or Na, or K; R is Er, or Ho, or Dy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94112051 CN1059069C (en) | 1994-02-24 | 1994-02-24 | Infrared sensor with 10.6 um orange light output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94112051 CN1059069C (en) | 1994-02-24 | 1994-02-24 | Infrared sensor with 10.6 um orange light output |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1104825A CN1104825A (en) | 1995-07-05 |
| CN1059069C true CN1059069C (en) | 2000-11-29 |
Family
ID=5035862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94112051 Expired - Fee Related CN1059069C (en) | 1994-02-24 | 1994-02-24 | Infrared sensor with 10.6 um orange light output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1059069C (en) |
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1994
- 1994-02-24 CN CN 94112051 patent/CN1059069C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1104825A (en) | 1995-07-05 |
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