CN101706323B - Installation structure of getter in infrared detector Dewar and implement method - Google Patents
Installation structure of getter in infrared detector Dewar and implement method Download PDFInfo
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- CN101706323B CN101706323B CN2009102265114A CN200910226511A CN101706323B CN 101706323 B CN101706323 B CN 101706323B CN 2009102265114 A CN2009102265114 A CN 2009102265114A CN 200910226511 A CN200910226511 A CN 200910226511A CN 101706323 B CN101706323 B CN 101706323B
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Abstract
The invention discloses an installation structure of a getter in an infrared detector Dewar and an implement method, belonging to assembly technology suitable for engineering Dewar preparation for infrared detector packaging. The installation structure of the getter in the infrared detector Dewar comprises a Dewar hollow columniform shell, a Kovar column stitch, a hollow columniform ceramic post, the getter, a mechanics support Omega ring, a circular arc cross pin, a serial-connection cross pin and a loop L-shaped pin. The invention introduces the specific structure and the implement method in the aspects of mechanics support, electricity connection, airtight vacuum eduction and the like to realize high-reliability airtight installation in the infrared detector Dewar of the getter, thereby prolonging the vacuum service life of infrared detector Dewar assembly and microminiaturizing the infrared detector Dewar assembly. The invention is suitable for the installation of the getter led from one side of the hollow columniform electrode stitch in the infrared detector Dewar, and is also suitable for an installation structure that the installation surface of the getter in the infrared detector Dewar is a plane.
Description
Technical field
This patent relates to the infrared eye manufacturing technology, specifically refers to install in a kind of Dewar the structure of getter, and it is used for the installation of the getter element in the infrared detector dewar parts.
Background technology,
Along with the raising of wavelength to long wave expansion and detection sensitivity, infrared focal plane detector must could be worked under profound hypothermia.Because advantages such as mechanical refrigeration have compact conformation, volume is little, in light weight, refrigerating capacity is big, cooling time is short, the cryogenic temperature controlled range is big, such detector adopts the mechanical refrigeration mode mostly in application at present.So also make and adopt the Dewar encapsulation to form infrared detector dewar assembly when it is used mostly.Vacuum life is an infrared detector dewar assembly important techniques index.Influence the factor of vacuum life of infrared detector dewar assembly main following some: 1) the whole leak rate of Dewar; 2) the parts material of Dewar and degassing processing technology; 3) end vacuum of Dewar component exhaust, baking temperature and evacuation time; 4) adsorbent is installed in the Dewar component.First three point depends primarily on infrared eye and Dewar prepares level, and is simultaneously also relevant with level of processing with employed raw-material production.And getter is installed is to improve vacuum life obvious results method.
Structure and implementation method that traditional getter in infrared detector Dewar is installed are as follows: 1) activation of getter being drawn the vacuum dewar cavity mainly is outward to realize by cutting down with the sintering process of glass; 2) the getter two metal stitch that are used to activate are to be connected by big electric current butt-joint with the electrical connection of the cut down stitch of glass sintering.There are the following problems for this classic method: the sintering that 1) can cut down with glass is that requirement is high airtight.Can cut down open-celled structure on the plane, realize that then beaded glass is very high with the yield rate that can cut down the pin sintering.If but require to realize this structure that then yield rate is lower in the side of hollow circuit cylinder.The more important thing is that can cut down between the Kong Yukong center of opening on the plane distance is that certain requirement (centre distance of comparative maturity is 1.41mm at present) is arranged, this has limited microminiaturization development of infrared detector dewar assembly; 2) quantity of increase getter in Dewar can increase the getter adsorbance total to residual gas in the Dewar, and it is effectively that this vacuum life to infrared detector dewar assembly improves.As everyone knows, the activation of each getter lead-in wire has two, that is to say that a getter is to need two can cut down stitch.Along with the increase of getter, the beaded glass stitch that can cut down sintering will increase greatly, and this can reduce high gas-tight sintered yield rate, increases the probability that vacuum life lost efficacy; 3) the metal stitch of getter is connected with the butt-joint of the cut down stitch of glass sintering, promptly is the electricity tie point, also is the getter mechanics strong point simultaneously.When the infrared eye Dewar component used in the occasion that some harsh mechanics require, the electricity that the fracture of butt-joint point can cause getter to be used to activate connected inefficacy, itself becomes fifth wheel simultaneously, influences other parts safety in the infrared detector dewar assembly.
Summary of the invention
The purpose of this patent provides a kind of mounting structure and implementation method of getter in infrared detector Dewar, solve the structure of traditional getter in infrared detector Dewar installation and the problem that implementation method exists, this vacuum life that helps infrared detector dewar assembly improves and is microminiaturized.
The mounting structure of a kind of getter in infrared detector Dewar of this patent as shown in Figure 1, it mainly comprises: Dewar hollow cylinder shape shell 1, can cut down cylinder stitch 2, hollow cylinder shape ceramics pole 3, getter 4, mechanics and support Ω ring 5, circular arc eedles 6, series connection eedles 7 and loop L type pin 8.Dewar hollow cylinder shape shell 1 can cut down material for selecting for use, and its side processes a hole 101 in advance, and chamfering but want deburring must not require on the both sides in hole 101.Whole nickel plating after 1 machine work of Dewar hollow cylinder shape shell is finished, nickel plating thickness is 0.01mm-0.02mm, fastness satisfies high temperature (800 ℃-900 ℃) soldering requirement; Can cut down cylinder stitch 2 and also require nickel plating, nickel plating thickness is 0.01mm-0.02mm, and fastness satisfies high temperature (800 ℃-900 ℃) soldering requirement; Hollow cylinder shape ceramics pole 3 is selected aluminium oxide ceramics for use, and thick film molybdenum manganese slurry metallization back nickel plating is adopted in cylindrical side 301 and outside cylinder side 302 in it, nickel plating thickness 0.01mm-0.02mm, and fastness satisfies high temperature (800 ℃-900 ℃) soldering requirement.Hollow cylinder shape ceramics pole 3 interior cylindrical side 301 diameters are than the big 0.04mm-0.08mm of diameter that can cut down cylinder stitch 2 after metallization and the nickel plating.Similarly, after metallization and the nickel plating hollow cylinder shape ceramics pole 3 outside cylinder sides 302 diameters than the little 0.04mm-0.08mm of diameter in the hole 101 that processes in advance on the shell 1.The big 0.2mm-0.4mm of thickness of hollow cylinder shape ceramics pole 3 aspect ratio Dewar hollow cylinder shape shells 1 wall, the part that goes out greatly places in the Dewar cavity; Mechanics supports the stainless steel strip that Ω ring 5, circular arc eedles 6, series connection eedles 7 and loop L type pin 8 all adopt square-section after the polishing, is processed into needed shape by unit clamp again.Mechanics supports the external diameter little 0.02mm-0.05mm of interior ring 501 diameters of Ω ring 5 than getter 4, guarantees that like this it can tightly clamp getter 4.The external arc of the feet 502 of support Ω ring 5 is consistent with the interior circular arc of Dewar hollow cylinder shape shell 1.The circular arc of circular arc eedles 6 is concentric with the curvature of shell 1 interior diameter.The same size of the external arc diameter of the feet 801 of loop L type pin 8 with the internal diameter of Dewar hollow cylinder shape shell 1.
The realization principle of a plurality of getter mounting structures of this patent is as follows: 1) all getters divide A and B two groups, and the electrical connection in A group or B group between all getters is connected in series by the eedles 7 of connecting.Series connection method is as shown in Fig. 1, electrode stitch of first getter and 6 butt-joints of circular arc eedles in the group, circular arc eedles 6 middle parts with can cut down stitch 2 butt-joints and be connected, electrode stitch of last getter and loop L type pin 8 butt-joints in the group, at last the feet 801 of loop L type pin 8 again with shell 1 butt-joint; 2) A group and B organize two getter groups and realize parallel connection again, backup each other; 3) outer can to cut down cylinder stitch 2 be an end with Dewar 1, and the housing of Dewar 1 is the other end, and the DC current that they are applied a certain size just can realize degasification and the activation to all getters.
The implementation method of this patent is as follows:
1) as shown in Figure 2, after Dewar hollow cylinder shape shell 1 is contained on the stainless V-type groove anchor clamps earlier, hollow cylinder shape ceramics pole 3 is inserted in the hole 101 of Dewar hollow cylinder shape shell 1, can cut down cylinder stitch 2 again inserts in the interior cylindrical side 301 of hollow cylinder shape ceramics pole 3, on I and II position, place a certain amount of solid filament ring-type or annulus sheet yellow gold (Ag72-Cu28) scolder then, at last they are sent into the vacuum furnace brazing together and connect.The technological parameter of soldering is: vacuum tightness is better than 2 * 10
-3Pa; Welding temperature is 820 ℃; Temperature retention time was greater than 10 minutes;
2) as shown in Figure 1, enforcing two feets 502 that support the Ω ring moves to the direction that deviates from mutually, make and support a certain amount of distortion elasticity of Ω ring generation, after mechanics supports the largest outer diameter of interior ring 501 diameters greater than getter 4 of Ω ring 5, allow mechanics support Ω ring 5 and be set on the getter 4.After removing external force, support the interior ring 501 of Ω ring 5 and tightly clamp getter 4.The interior ring 501 that guarantees mechanics support Ω ring 5 in this process is concentric with getter 4 maximum outside cylinder.According to said method finish the assembling that all mechanics support Ω ring 5 and getter 4.
3) as shown in Figure 1, finish circular arc eedles 6 centre positions and the butt-joint that can cut down cylinder stitch 2.Need explanation: the present invention has A and B two getter groups.If the vacuum life according to Dewar designs only one group of getter group of needs, just do not need circular arc eedles 6.And the electrode stitch that A organizes first getter is directly seen accompanying drawing 3 with the butt-joint that can cut down cylinder stitch 2.
4) shown in the vertical view of accompanying drawing 1, utilize special-purpose butt-joint tong-like anchor clamps to finish A successively and organize the butt-joint that all mechanics support two feets 502 with the Dewar hollow cylinder shape shell 1 of Ω ring 5.Butt-joint tong-like anchor clamps will be guaranteed can operate from the both direction of cylindrical shell 1.Select relevant parameters for use according to the thickness of shell and feet 502 thickness of mechanics support Ω ring 5, guaranteed the physical strength of butt-joint point.The order of butt-joint is for from left to right;
5) shown in the vertical view of accompanying drawing 1, utilize special-purpose butt-joint tong-like anchor clamps to finish the butt-joint that A organizes electrode stitch with the eedles 7 of connecting of all getters 4 successively.Finish the butt-joint that A organizes the electrode pin and the circular arc eedles 6 of first getter 4 again, finish the butt-joint that A organizes the electrode pin and the loop L type pin 8 of last getter 4 at last, and the butt-joint of loop L type pin 8 feets 801 and Dewar hollow cylinder shape shell 1.
6) similar step 4 shown in the vertical view of accompanying drawing 1, is utilized special-purpose butt-joint tong-like anchor clamps to finish B successively and is organized the butt-joint that all mechanics support two feets 502 with the Dewar hollow cylinder shape shell of Ω ring 5.The order of butt-joint is for to turn left from the right side;
7) similar step 5 shown in the vertical view of accompanying drawing 1, utilizes special-purpose butt-joint tong-like anchor clamps to finish the butt-joint that B organizes electrode pin with the eedles 7 of connecting of all getters 4 successively.Finish the butt-joint that B organizes the electrode pin and the circular arc eedles 6 of first getter 4 again, finish the butt-joint that B organizes the electrode pin and the loop L type pin 8 of last getter 4 at last, and the butt-joint of loop L type pin 8 feets 801 and Dewar hollow cylinder shape 1.
This patent has following advantage to be:
(1) this patent is simple in structure, easy to operate, with low cost;
(2) gas-tight sintered stitch of drawing vacuum of the present invention only has one, has increased the yield rate of Dewar.Greatly reduce because the probability that impermeability causes vacuum life to lose efficacy;
(3) the present invention's metal stitch of having remedied the traditional getters mounting structure is connected with the butt-joint of the cut down stitch of glass sintering, promptly is the electricity tie point, also is the deficiency of the getter mechanics strong point, realizes that material electricity connects and the separating of mechanics support.The getter mechanics supports by mechanics support Ω ring 5 to be guaranteed.Increased the reliability of Dewar component greatly;
(4) the getter quantity of installation of the present invention can be a lot, and this can improve the vacuum life of Dewar component greatly;
(5) the present invention has A group and B to organize two getter groups, is separate from structure, can backup each other, and has increased the reliability of getter mounting structure;
(6) the present invention is applicable to outside the getter that cylindric as shown in Figure 1 electrode stitch both sides go out in the infrared detector dewar, on one side equally also be applicable to the getter (seeing accompanying drawing 4) that hollow cylindrical electrode stitch goes out;
(7) this patent is applicable to that the getter in infrared detector Dewar installed surface is a periphery, is applicable to that equally also the getter installed surface is the plane.
Description of drawings
The mounting structure synoptic diagram of Fig. 1 getter in infrared detector Dewar;
Among the figure: 1-Dewar hollow cylinder shape shell;
Cylindrical hole on the 101-Dewar hollow cylinder shape shell;
2-can cut down the cylinder stitch;
3-hollow cylinder shape ceramics pole;
The interior cylindrical side of 301-hollow cylinder shape ceramics pole;
The outside cylinder side of 302-hollow cylinder shape ceramics pole;
The 4-getter;
The 5-mechanics supports the Ω ring;
The 501-mechanics supports the interior ring of Ω ring;
The 502-mechanics supports two feets of Ω ring;
6-circular arc eedles;
The 7-eedles of connecting;
8-loop L type pin
801-loop L type pin 8 feets 801
Fig. 2 C place structure enlarged diagram.
Fig. 3 only needs one group of getter group, the electrode stitch of first getter and the connection diagram that can cut down cylinder stitch 2.
Fig. 4 the present invention is directed to the getter scheme of installation that hollow cylindrical electrode stitch goes out on one side.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail:
Embodiment is certain space flight project with 320 * 240 infrared detector dewar assembly structures, and as shown in Figure 1, its main implementation method is as follows:
1. each parts preparation:
A) Dewar hollow cylinder shape shell 1 material selection can cut down 4J29, and outside diameter is φ 44, and wall thickness is 1mm, and its side processes a hole φ 3.8mm in advance, and last tolerance is+0.04mm that following tolerance is+0.01mm.Chamfering but want deburring must not require on the both sides in hole 101.Whole nickel plating after shell 1 machine work is finished, nickel plating thickness are 0.01mm, and fastness satisfies high temperature (800 ℃-900 ℃) soldering requirement;
B) can cut down cylinder stitch 2 material selections and can cut down 4J29, diameter is φ 1, and last tolerance is 0mm, and following tolerance is-0.03mm.Require nickel plating, nickel plating thickness is 0.01mm, and fastness satisfies high temperature (800 ℃-900 ℃) soldering requirement;
C) hollow cylinder shape ceramics pole 3 is selected aluminium oxide ceramics (95 porcelain) for use, and thick film molybdenum manganese slurry metallization back nickel plating is adopted in cylindrical hole side 301 and outside cylinder side 302 in it, nickel plating thickness 0.01mm, and fastness satisfies high temperature (800 ℃-900 ℃) soldering requirement.The diameter phi 1 of cylindrical side 301 in the hollow cylinder shape ceramics pole 3 after metallization and the nickel plating, last tolerance is+0.05mm that following tolerance is+0.01mm.Similarly, hollow cylinder shape ceramics pole 3 outside cylinder sides 302 diameters are φ 3.8mm after metallization and the nickel plating, and last tolerance is 0mm, and following tolerance is-0.04mm.Hollow cylinder shape ceramics pole 3 height H 1 are 1.2mm, and than the big 0.2mm of wall thickness 1mm of Dewar hollow cylinder shape shell 1, the part that goes out greatly places in the Dewar cavity;
D) mechanics supports Ω ring 5, circular arc eedles 6, series connection eedles 7 and loop L type pin 8 and all adopts square-section after the polishing (stainless steel strip of 1mm * 0.5mm), unit clamp is processed into needed shape again.Interior ring 501 diameters that mechanics supports Ω ring 5 are φ 4mm, with the external diameter φ 4mm gap of getter 4 are-0.02mm, guarantee that like this it can tightly clamp getter 4.The overall diameter of the feet 502 of support Ω ring 5 is the same big or small with the internal diameter φ 42mm of Dewar hollow cylinder shape shell 1.The circular arc degree of circular arc eedles 6 is consistent with shell 1 internal diameter φ 42mm.The same size of the overall diameter of the feet 801 of loop L type pin 8 with the internal diameter φ 42mm of Dewar hollow cylinder shape shell 1.
2. assemble and Connection Step
1) as shown in Figure 2, after Dewar hollow cylinder shape shell 1 is contained on the stainless V-type groove anchor clamps earlier, hollow cylinder shape ceramics pole 3 is inserted in the hole 101 of Dewar hollow cylinder shape shell 1, can cut down cylinder stitch 2 again inserts in the interior cylindrical side 301 of hollow cylinder shape ceramics pole 3, on I and II position, place each one of the yellow gold that diameter of section is φ 0.5mm (Ag72-Cu28) scolder solid wire ring φ 1.1mm and φ 3.9mm then respectively, at last they are sent into the vacuum furnace brazing together and connect.The technological parameter of soldering is: vacuum tightness is better than 2 * 10
-3Pa; Welding temperature is 820 ℃; Temperature retention time was greater than 10 minutes;
2) as shown in Figure 1, enforcing two feets 502 that support the Ω ring moves to the direction that deviates from mutually, after having guaranteed to support a certain amount of distortion elasticity of Ω ring generation, mechanics supports the largest outer diameter of interior ring 501 diameters of Ω ring 5 greater than getter 4, allows mechanics support Ω ring 5 well and is set on the getter 4.After removing external force, support the interior ring 501 of Ω ring 5 and tightly clamp getter 4.The interior ring 501 that guarantees mechanics support Ω ring 5 in this process is concentric with getter 4 maximum outside cylinder.According to said method finish the assembling that four mechanics support 5 and four getters 4 of Ω ring.
3) as shown in Figure 1, finish circular arc eedles 6 centre positions and the butt-joint that can cut down cylinder stitch 2.Need explanation: respectively have two in present embodiment A and the B two getter groups.
4) shown in the vertical view of accompanying drawing 1, utilize special-purpose butt-joint tong-like anchor clamps to finish the butt-joint that 2 mechanics of A group support two feets 502 with the shell of Ω ring 5 successively.Butt-joint tong-like anchor clamps will be guaranteed can operate from the both direction of cylindrical shell 1.According to the thickness of shell and the feet 502 thickness 0.5mm of mechanics support Ω ring 5, selecting relevant parameters for use is 20W, has guaranteed the physical strength of butt-joint point.The order of butt-joint is for from left to right;
5) shown in the vertical view of accompanying drawing 1, utilize special-purpose butt-joint tong-like anchor clamps to finish the butt-joint of electrode pin with the eedles 7 of connecting of 2 getters 4 of A group successively.Finish the butt-joint that A organizes the electrode pin and the circular arc eedles 6 of first getter 4 again, finish the electrode pin of second getter 4 of A group and the butt-joint of loop L type pin 8 at last, and the butt-joint of loop L type pin 8 feets 801 and Dewar 1.
6) similar step 4 shown in the vertical view of accompanying drawing 1, utilizes special-purpose butt-joint tong-like anchor clamps to finish the butt-joint that 2 mechanics of B group support two feets 502 with the shell of Ω ring 5 successively.The order of butt-joint is for to turn left from the right side;
7) similar step 5 shown in the vertical view of accompanying drawing 1, utilizes special-purpose butt-joint tong-like anchor clamps to finish the butt-joint of electrode pin with the eedles 7 of connecting of 2 getters 4 of B group successively.Finish the butt-joint that B organizes the electrode pin and the circular arc eedles 6 of first getter 4 again, finish the electrode pin of second getter 4 of B group and the butt-joint of loop L type pin 8 at last, and the butt-joint of loop L type pin 8 feets 801 and Dewar 1.
The mounting structure and the implementation method of getter in infrared detector Dewar have below just been finished, solve the structure of traditional getter in infrared detector Dewar installation and the problem that implementation method exists, this vacuum life that helps infrared detector dewar assembly improves and is microminiaturized.
Claims (8)
1. the mounting structure of a getter in infrared detector Dewar, it mainly comprises: Dewar hollow cylinder shape shell (1), can cut down cylinder stitch (2), hollow cylinder shape ceramics pole (3), getter (4), mechanics and support Ω ring (5), circular arc eedles (6), series connection eedles (7) and loop L type pin (8), it is characterized in that:
Two groups of getters of A, B (4) are that arrange along about Dewar hollow cylinder shape shell (1) inwall on the boundary with the aperture (101) on the Dewar hollow cylinder shape shell (1), described getter (4) is clamped in mechanics and supports in the interior ring (501) of Ω ring (5), and mechanics supports Ω ring (5) and is fixed on the Dewar shell by the butt-joint of two feets (502) with Dewar hollow cylinder shape shell (1);
Electrical connection in described A group or B group getter (4) between all getters is connected in series by series connection eedles (7), electrode stitch of first getter and circular arc eedles (6) butt-joint in the group, electrode stitch of last getter and loop L type pin (8) butt-joint in the group, the feet (801) of loop L type pin (8) again with Dewar hollow cylinder shape shell (1) butt-joint, circular arc eedles (6) middle part with can cut down cylinder stitch (2) butt-joint;
Can cut down that cylinder stitch (2) inserts and soldering is fixed in the interior cylindrical side (301) of hollow cylinder shape ceramics pole (3), and hollow cylinder shape ceramics pole (3) inserts and soldering is fixed in the aperture (101) on the Dewar hollow cylinder shape shell (1).
2. the mounting structure of a kind of getter in infrared detector Dewar according to claim 1, it is characterized in that: whole nickel plating after described Dewar hollow cylinder shape shell (1) machine work is finished, nickel plating thickness is 0.01mm-0.02mm, and fastness satisfies 800 ℃ of-900 ℃ of soldering requirements of high temperature.
3. the mounting structure of a kind of getter in infrared detector Dewar according to claim 1, it is characterized in that: the described cylinder stitch (2) that cuts down is made by stainless steel, whole nickel plating, nickel plating thickness is 0.01mm-0.02mm, fastness satisfies 800 ℃ of-900 ℃ of soldering requirements of high temperature.
4. the mounting structure of a kind of getter in infrared detector Dewar according to claim 1, it is characterized in that: described hollow cylinder shape ceramics pole (3) is selected aluminium oxide ceramics for use, thick film molybdenum manganese slurry metallization back nickel plating is adopted in cylindrical side (301) and outside cylinder side (302) in it, nickel plating thickness 0.01mm-0.02mm, fastness satisfies 800 ℃ of-900 ℃ of soldering requirements of high temperature; The interior cylindrical side of hollow cylinder shape ceramics pole (3) (301) diameter ratio can cut down the big 0.04mm-0.08mm of diameter of cylinder stitch (2) after metallization and the nickel plating, and hollow cylinder shape ceramics pole (3) outside cylinder side (302) diameter is than the little 0.04mm-0.08mm of diameter of the aperture (101) on the Dewar hollow cylinder shape shell (1) after metallization and the nickel plating; The big 0.2mm-0.4mm of thickness of hollow cylinder shape ceramics pole (3) aspect ratio Dewar hollow cylinder shape shell (1) wall, the part that exceeds places in the Dewar cavity.
5. the mounting structure of a kind of getter in infrared detector Dewar according to claim 1, it is characterized in that: described mechanics supports Ω ring (5) and is made by stainless steel, ring (501) diameter is than the little 0.02mm-0.05mm of external diameter of getter (4) in it, to clamp getter (4), the external arc of the feet (502) of support Ω ring (5) is consistent with the interior circular arc of Dewar hollow cylinder shape shell (1).
6. the mounting structure of a kind of getter in infrared detector Dewar according to claim 1, it is characterized in that: described circular arc eedles (6) is made by stainless steel, and its circular arc is concentric with the curvature of Dewar hollow cylinder shape shell (1) inwall.
7. the mounting structure of a kind of getter in infrared detector Dewar according to claim 1, it is characterized in that: described loop L type pin (8) is made by stainless steel, and the external arc diameter of its feet (801) is consistent with the internal diameter of Dewar hollow cylinder shape shell (1).
8. implementation method of structure according to claim 1 is characterized in that may further comprise the steps:
1) after Dewar hollow cylinder shape shell (1) is contained on the stainless V-type groove anchor clamps earlier, hollow cylinder shape ceramics pole (3) is inserted in the hole (101) of Dewar hollow cylinder shape shell (1), can cut down again in the interior cylindrical side (301) of cylinder stitch (2) insertion hollow cylinder shape ceramics pole (3), then at the slit I in the hole (101) of the outer circumference surface of hollow cylinder shape ceramics pole (3) and Dewar hollow cylinder shape shell (1) with can cut down a certain amount of solid filament ring-type of placement or annulus sheet yellow gold Ag72-Cu28 scolder on the II position, slit of interior cylindrical side (301) of cylinder stitch (2) outer circumference surface and hollow cylinder shape ceramics pole (3), at last they are sent into the vacuum furnace brazing together and connect, the technological parameter of soldering is: vacuum tightness is better than 2 * 10
-3Pa, welding temperature is 820 ℃, temperature retention time was greater than 10 minutes;
2) getter (4) is installed: enforce two feets (502) that support the Ω ring and move to the direction that deviates from mutually, make and support a certain amount of distortion elasticity of Ω ring generation, after mechanics supports the largest outer diameter of interior ring (501) diameter greater than getter (4) of Ω ring (5), allowing mechanics support Ω ring (5) is set on the getter (4), after removing external force, mechanics supports the interior ring (501) of Ω ring (5) and tightly clamps getter (4), the interior ring (501) of assurance mechanics support Ω ring (5) is concentric with the maximum outside cylinder of getter (4) in this process, according to said method finishes the assembling that all mechanics support Ω rings (5) and getter (4);
3) finish circular arc eedles (6) centre position and can cut down the butt-joint of cylinder stitch (2), if only need one group of getter group, the electrode stitch of just A being organized first getter directly and can cut down the butt-joint of cylinder stitch 2;
4) utilize special-purpose butt-joint tong-like anchor clamps to finish A successively and organize the butt-joint that all mechanics support two feets (502) with the Dewar hollow cylinder shape shell (1) of Ω ring (5), the order of butt-joint is for from left to right;
5) utilize special-purpose butt-joint tong-like anchor clamps to finish A successively and organize the electrode stitch of all getters (4) and the butt-joint of the eedles of connecting (7), finish the butt-joint that A organizes the electrode pin and the circular arc eedles (6) of first getter (4) again, finish the butt-joint that A organizes the electrode pin and the loop L type pin (8) of last getter (4) at last, and the butt-joint of loop L type pin (8) feet (801) and Dewar hollow cylinder shape shell (1);
6) similar step 4 is utilized special-purpose butt-joint tong-like anchor clamps to finish B successively and is organized the butt-joint that all mechanics support two feets (502) with the Dewar hollow cylinder shape shell of Ω ring (5), and the order of butt-joint is for to turn left from the right side;
7) similar step 5, utilize special-purpose butt-joint tong-like anchor clamps to finish B successively and organize the electrode pin of all getters (4) and the butt-joint of the eedles of connecting (7), finish the butt-joint that B organizes the electrode pin and the circular arc eedles (6) of first getter (4) again, finish the butt-joint that B organizes the electrode pin and the loop L type pin (8) of last getter (4) at last, and the butt-joint of loop L type pin (8) feet (801) and Dewar hollow cylinder shape shell (1).
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| US9885611B2 (en) * | 2014-04-11 | 2018-02-06 | Tetra Laval Holdings & Finance S.A. | Sensor arrangement and use of sensor arrangement |
| CN106768378A (en) * | 2016-11-22 | 2017-05-31 | 昆明物理研究所 | The infrared detector minitype Dewar of real-time detection vacuum |
| CN112067141A (en) * | 2020-07-20 | 2020-12-11 | 武汉高芯科技有限公司 | Infrared detector |
| CN112082660A (en) * | 2020-07-28 | 2020-12-15 | 武汉高芯科技有限公司 | Infrared detector and manufacturing method thereof |
| CN113399907A (en) * | 2021-05-24 | 2021-09-17 | 中国电子科技集团公司第十一研究所 | Welding method for weldment on Dewar shell |
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