CN105845537A - Microchannel-diameter-variable improved microchannel plate - Google Patents
Microchannel-diameter-variable improved microchannel plate Download PDFInfo
- Publication number
- CN105845537A CN105845537A CN201610335822.4A CN201610335822A CN105845537A CN 105845537 A CN105845537 A CN 105845537A CN 201610335822 A CN201610335822 A CN 201610335822A CN 105845537 A CN105845537 A CN 105845537A
- Authority
- CN
- China
- Prior art keywords
- main body
- microchannel
- diameter
- protection
- protection ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
- H01J43/06—Electrode arrangements
- H01J43/08—Cathode arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
- H01J43/06—Electrode arrangements
- H01J43/10—Dynodes
Landscapes
- Electron Tubes For Measurement (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
The invention discloses a microchannel-diameter-variable improved microchannel plate, which comprises a main body. The main body is externally provided with protection rings along radial direction; the main body is provided with a plurality of microchannels; the microchannels are parallel to the axial direction of the main body; the diameters of the microchannels get smaller gradually and then, get larger gradually along the axial direction of the main body; when two protection sleeves are arranged symmetrically with respect to the main body, one protection ring is arranged in a groove formed by the two protection sleeves; the diameter of the groove is equal to the external diameter of the protection ring; the side surfaces, parallel to the main body, in each groove are respectively provided with a hard spring; and each hard spring is connected with a buffer block. The improved microchannel plate also comprises fastening bolts. Each fastening bolt runs through the two protection sleeves along the direction vertical to the main body, and the fastening bolts make no contact with the protection rings. Through the structure that the diameters of the microchannels get smaller gradually and then, get larger gradually along the axial direction of the main body, ion feedback effect is weakened, noise is reduced effectively, image definition is improved and a photoelectric cathode is protected.
Description
Technical field
The present invention relates to a kind of microchannel plate, be specifically related to the modified model microchannel plate that aperture, a kind of microchannel is variable.
Background technology
Faint light under the conditions of faint light at night can be shone by low-light level night vision device is mutually changed by between image information, is increased
By force, the process such as process enable faint light to be seen by user, can see that human eye cannot be seen by low-light level night vision device people
X-ray, ultraviolet light, near-infrared radiation etc..Along with the development of science and technology, low-light level night vision device is widely used in military affairs, sky
The numerous areas such as literary composition, space flight, biology, high-speed photography, electro-optical fire control, and can be combined with the technology such as infrared, laser, radar,
Forming complete photoelectricity investigation, measurement and warning system, the importance of low-light level night vision device gradually highlights, but the lll night vision of China
Technology is more backward, so the function of research Low-light Level Night Vision Technology, improvement low-light level night vision device is significant.
Current domestic main Low-light Level Night Vision Technology is secondary and super secondary low light technology, secondary and super secondary low light technology
Compared with generation low light technology, its essence is in image intensifier to apply microchannel plate, and no longer as generation lll night vision
Technology needs to connect substantial amounts of single-stage image intensifier to meet the gain of light effect of military exigence.Microchannel plate is a kind of special light
Learn the electron multiplier made of fiber, there is transmission, the function of enhancing electronic image, also have that volume is little, lightweight, resolving power
Well, gain is high, noise is low, use the advantages such as voltage is low.Microchannel plate can utilize the characteristic of secondary, reaches high
Electron multiplication.Operationally, photocathode launches uniform electronics, and electronics is increased further by intensity after microchannel plate
By force, the beam bombardment light-emitting phosphor after amplification, it is achieved frame shows.
The microchannel diameter of conventional microchannel plate will not change, when being applied to the voltage of microchannel plate both sides for exceeding
During 1000V, it may appear that ion feedback phenomenon, microchannel plate noise is caused to increase.
Summary of the invention
The technical problem to be solved is the defect for conventional microchannel plate, it is provided that a kind of aperture, microchannel can
The modified model microchannel plate become, the microchannel diameter of solution conventional microchannel plate is immutable causes low-light level night vision device noise to increase,
The problem that definition reduces.
The present invention is achieved through the following technical solutions: the modified model microchannel plate that aperture, a kind of microchannel is variable, including main
Body, described main body radially outside is provided with protection ring, main body is provided with some microchannels, and described microchannel is parallel to main body
Axial, the diameter of microchannel the most first tapers into along main body and becomes larger, also include protection set, described protection ring and
Protection set position be configured to, when two protection set about polygonal mirror main body face symmetrically placed time, protection ring be positioned at two protection set
In the groove formed, described groove diameter is provided with hard bullet in being equal to protection ring external diameter, groove on the side of body parallel
Spring, described hard spring connects buffer stopper, also includes fastening bolt, and described fastening bolt runs through two along the direction with body normal
Individual protection set, fastening bolt does not contacts with protection ring.In prior art, when the voltage being applied to microchannel plate two ends is higher than
During 1000V, it may appear that ion feedback, the noise of microchannel plate increases, and causes low-light level night vision device definition to reduce.Microchannel plate work
When making, the secondary electron in microchannel can repeatedly double, and forms highdensity electron cloud at channel end, can will participate in passage
Gas molecule ionization, the cation after ionization under the effect of passage internal electric field, clash into conduit wall produce extra electron, part
Extra electron can move towards microchannel entrance direction, causes damage the photocathode of image intensifier, so ion feedback effect
Generation in image intensifier can make in image intensifier noise improve and photocathode sensitivity decrease, it is therefore necessary to prevent from
Sub-feedback effect.In order to solve the problems referred to above, the invention provides the modified model microchannel plate that aperture, a kind of microchannel is variable,
During use, first protection is overlapped horizontal positioned, in protection set, is arranged at intervals with some hard springs and buffer stopper, by microchannel plate
Protection ring part of horizontal is placed on the buffer stopper in protection set, adjusts the position of microchannel plate, and the main body making microchannel plate is complete
Portion is exposed to outside protection set, so so that the microchannel in main body all works, after adjusting the position of microchannel plate, gently
Lightly close second half protection set, and after the buffer stopper in second half protection set contacts with microchannel plate, two protections of aliging put
The through hole arranged, is inserted into fastening bolt from through hole, and diagonal the most gradually tightens fastening bolt afterwards, and two protection sets are
Metal structure and only outside are provided with fastening bolt, protection ring owing to contacting with buffer stopper and itself will not be extruded by force,
After fastening bolt is tightened, protection ring is clamped in protection set, and main body farthest exposes.Microchannel in main body is being led
The surface diameter of body is maximum so that from the probability increase of the electron collision microchannel interior walls that photocathode is launched, by experiment
Finding, the probability increasing electron collision microchannel interior walls can effectively reduce background noise；Microchannel diameter first tapers into increasing
Having added electronics collision frequency in passage so that gain characteristic increases, electronics is being become by microchannel interior walls enhancing afterwards
Electron beam, electrons forms highdensity electron cloud at channel end, the gas molecule electricity that electron cloud can will remain in microchannel
From, the cation after ionization, under the effect of passage internal electric field, clashes into microchannel wall and produces extra electron, occur that ion feedback is imitated
Should, not only can increase background noise, reduce definition, also can damage photocathode, reduce the life-span of photocathode, this device exists
The microchannel second half section makes microchannel diameter become larger, and can not only reduce high density electron cloud at channel end to microchannel wall
Collision, also as microchannel mid diameter is minimum and be effectively prevented from electronics and reflect toward microchannel entrance, it is to avoid it damages light
Electricity negative electrode.This device the most first reduces, by arranging the diameter of microchannel, the structure increased again along main body, weakens ion feedback
Effect, significantly reduces noise, improves image definition, also protects photocathode；It addition, by the guarantor of metal material
Sheath, this device can be protected main body not to be worn, protect set that main body is fixed in protection set, hard spring and buffer stopper
Can guarantee that when low-light level night vision device collides or drops, it is possible to shed the stress acting on microchannel plate, play damping
Effect, compared with prior art, this device is difficult to impaired, extends the use time, reduces the use cost of low-light level night vision device.
Further, described microchannel is symmetrical about the vertical axis of main body, and the microchannel diameter of body surfaces is maximum,
Vertically the diameter on axis is minimum, and maximum gauge is 12 to 18 microns, and maximum gauge is 2 times of minimum diameter.By experiment
Finding, when microchannel is about the vertical axis symmetry of main body, ion feedback effect can be reduced to minimum, and maximum gauge is
During 2 times of minor diameter, it is possible to effectively reduce noise, increase image definition.
Further, external diameter is its internal diameter 1.5 to 2.5 times of described protection ring, described protection ring and the thickness of main body
Identical.Found by practice, when external diameter is its internal diameter 1.5 to 2.5 times of protection ring, protection set and protection can not only be ensured
Well combine, guarantee the quantity of microchannel between ring, also save the consumption of microchannel plate material, reduce microchannel plate
Cost.
Further, described hard spring is positioned at the center of groove inner wall.Hard spring is arranged in groove inner wall
Heart position makes the power that buffer stopper can preferably contact with protection ring, hard spring is subject to more uniform, it addition, protection ring is at protection set
Inside it is not susceptible to deflection.
Further, described buffer stopper is made up of elastomeric material, buffer stopper and body parallel, and the length of buffer stopper is equal to protecting
The ring width of retaining ring.Buffer stopper can use nitrile rubber to make, and nitrile rubber has certain elasticity, will not abrasion protection ring, with
Time, also protection ring will be caused to glance off during low-light level night vision device rocks because of excessively soft, reduce microchannel
The gain characteristic of plate, additionally nitrile rubber also has certain frictional force, plays certain fixation.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, the present invention increases the diameter at microchannel entrance so that electron collision microchannel interior walls several launched from photocathode
Rate increases, and effectively reduces background noise, and at electronics after microchannel entrance enters, microchannel diameter tapers into and adds electronics
Collision frequency in passage, increases the gain characteristic of microchannel plate, and microchannel diameter is gradually increased afterwards, not only avoid
The ion feedback effect that exit, microchannel high density electron cloud causes, also prevents electronics from reflecting toward microchannel entrance, damages light
Electricity negative electrode；
2, the invention provides the modified model microchannel plate that aperture, a kind of microchannel is variable, protection set is possible not only to protect microchannel
The edge of plate will not wear and tear, and also by the buffer stopper being arranged in protection set and hard spring, collides at low-light level night vision device, falls
When falling, microchannel plate is played cushioning effect, extend the service life of microchannel plate, reduce use cost；
3, the present invention is found by practice, when external diameter is its internal diameter 1.5 to 2.5 times of protection ring, can not only ensure protection
Set is well combined, guarantees the quantity of microchannel between protection ring, also saves the consumption of microchannel plate material, reduces micro-
The cost of channel plate.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes of the application
Point, it is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the semi-cutaway of present configuration.
The parts title of labelling and correspondence in accompanying drawing:
1-main body, 2-microchannel, 3-protection ring, 4-protects set, 5-hard spring, 6-fastening bolt, 7-buffer stopper.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As it is shown in figure 1, the present invention is the modified model microchannel plate that aperture, a kind of microchannel is variable, including main body 1, main body 1
Radially outside is provided with protection ring 3, and main body 1 is provided with some microchannels 2, and described microchannel 2 is parallel to the axle of main body 1
To, the diameter of microchannel 2 axially first tapers into along main body 1 and becomes larger, also includes protecting set 4, protection ring 3 and protection
Set 4 position be configured to, when two protection set 4 about main body 1 minute surface symmetrically placed time, protection ring 3 be positioned at two protection sets 4
In the groove formed, the side that groove diameter is parallel with main body 1 in being equal to protection ring 3 external diameter, groove is provided with hard spring
5, hard spring 5 connects buffer stopper 7, also includes fastening bolt 6, and fastening bolt 6 runs through two guarantors along the direction vertical with main body 1
Sheath 4, fastening bolt 6 does not contacts with protection ring 3.Microchannel 2 is symmetrical about the vertical axis of main body 1, main body 1 surface micro-
Channel diameter is maximum, and the diameter on vertical axis is minimum, and maximum gauge is 12 to 18 microns, and maximum gauge is minimum diameter
2 times.External diameter is its internal diameter 1.5 to 2.5 times of protection ring 3, protection ring 3 is identical with the thickness of main body 1.Hard spring 5 is positioned at recessed
The center of groove inwall.Buffer stopper 7 is made up of elastomeric material, and buffer stopper 7 is parallel with main body 1, and the length of buffer stopper 7 is equal to protecting
The ring width of retaining ring 3.During use, first protection is overlapped 4 horizontal positioned, in protection set 4, is arranged at intervals with some hard springs 5 and buffering
Block 7, lies in a horizontal plane in protection ring 3 on the buffer stopper 7 in protection set 4, adjusts the position of microchannel plate, makes main body 1 the most sudden and the most violent
Being exposed at outside protection set 4, so so that the microchannel 2 in main body 1 all works, close second half protection set the most lightly
4, after the buffer stopper 7 in second half protection set 4 contacts with protection ring 3, the through hole that two the protection sets 4 that align are arranged, will fastening
Bolt 6 is inserted into from through hole, and diagonal the most gradually tightens fastening bolt 6 afterwards, and two protection sets 4 are metal structures and only have
Outside is provided with fastening bolt 6, and protection ring 3 is owing to contacting with buffer stopper 7 and itself will not be extruded by force, when fastening bolt 6
After tightening, protection ring 3 is clamped in protection set 4, and main body 1 farthest exposes, and photocathode is launched uniformly afterwards
Electronics, electronics enters microchannel 2, and the electrons in microchannel 2 produces secondary electron and repeatedly doubles, the electronics after intensity amplification
Bundle bombardment light-emitting phosphor, it is achieved frame shows.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should comprise
Within protection scope of the present invention.
Claims (5)
1. the modified model microchannel plate that aperture, microchannel is variable, including main body (1), described main body (1) radially outside sets
It is equipped with protection ring (3), main body (1) is provided with some microchannels (2), it is characterised in that described microchannel (2) are parallel to main body
(1) axial, the diameter of microchannel (2) axially first tapers into along main body (1) and becomes larger, also includes protection set (4),
The position of described protection ring (3) and protection set (4) is configured to, when two protections set (4) are symmetrically placed about main body (1) minute surface
Time, protection ring (3) is positioned in the groove that two protections set (4) are formed, and described groove diameter is equal to protection ring (3) external diameter, recessed
Being provided with hard spring (5) on side parallel with main body (1) in groove, described hard spring (5) connects buffer stopper (7), also includes
Fastening bolt (6), described fastening bolt (6) runs through two protections set (4), fastening bolt (6) along the direction vertical with main body (1)
Do not contact with protection ring (3).
The modified model microchannel plate that aperture, a kind of microchannel the most according to claim 1 is variable, it is characterised in that described micro-
Passage (2) is symmetrical about the vertical axis of main body (1), and the microchannel diameter on main body (1) surface is maximum, on vertical axis
Diameter is minimum, and maximum gauge is 12 to 18 microns, and maximum gauge is 2 times of minimum diameter.
The modified model microchannel plate that aperture, a kind of microchannel the most according to claim 1 is variable, it is characterised in that described guarantor
External diameter is its internal diameter 1.5 to 2.5 times of retaining ring (3), described protection ring (3) is identical with the thickness of main body (1).
The modified model microchannel plate that aperture, a kind of microchannel the most according to claim 1 is variable, it is characterised in that described firmly
Spring (5) is positioned at the center of groove inner wall.
The modified model microchannel plate that aperture, a kind of microchannel the most according to claim 1 is variable, it is characterised in that described slow
Rushing block (7) to be made up of elastomeric material, buffer stopper (7) is parallel with main body (1), and the length of buffer stopper (7) is equal to the ring of protection ring (3)
Wide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610335822.4A CN105845537B (en) | 2016-05-20 | 2016-05-20 | A kind of variable modified microchannel plate in microchannel aperture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610335822.4A CN105845537B (en) | 2016-05-20 | 2016-05-20 | A kind of variable modified microchannel plate in microchannel aperture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105845537A true CN105845537A (en) | 2016-08-10 |
| CN105845537B CN105845537B (en) | 2018-02-13 |
Family
ID=56592882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610335822.4A Active CN105845537B (en) | 2016-05-20 | 2016-05-20 | A kind of variable modified microchannel plate in microchannel aperture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105845537B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5510673A (en) * | 1994-07-29 | 1996-04-23 | Litton Systems, Inc. | Shock resistant cascaded microchannel plate assemblies and methods of use |
| WO2004017357A1 (en) * | 2002-08-16 | 2004-02-26 | Litton Systems, Inc. | Microchannel plate having input/output face funneling |
| CN201909148U (en) * | 2010-11-30 | 2011-07-27 | 中国科学院大连化学物理研究所 | Micro-channel plate rack with function of shock absorption |
| CN104090290A (en) * | 2014-07-25 | 2014-10-08 | 中国科学技术大学 | Polar coordinate reading type two-dimensional position sensitive detector with double wedge-strip anodes |
| CN205692796U (en) * | 2016-05-20 | 2016-11-16 | 四川汇英光电科技有限公司 | The variable conduit of a kind of band protection set declines channel plate |
-
2016
- 2016-05-20 CN CN201610335822.4A patent/CN105845537B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5510673A (en) * | 1994-07-29 | 1996-04-23 | Litton Systems, Inc. | Shock resistant cascaded microchannel plate assemblies and methods of use |
| WO2004017357A1 (en) * | 2002-08-16 | 2004-02-26 | Litton Systems, Inc. | Microchannel plate having input/output face funneling |
| CN201909148U (en) * | 2010-11-30 | 2011-07-27 | 中国科学院大连化学物理研究所 | Micro-channel plate rack with function of shock absorption |
| CN104090290A (en) * | 2014-07-25 | 2014-10-08 | 中国科学技术大学 | Polar coordinate reading type two-dimensional position sensitive detector with double wedge-strip anodes |
| CN205692796U (en) * | 2016-05-20 | 2016-11-16 | 四川汇英光电科技有限公司 | The variable conduit of a kind of band protection set declines channel plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105845537B (en) | 2018-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20170287673A1 (en) | Shielded, Transmission-Target, X-Ray Tube | |
| CN205692796U (en) | The variable conduit of a kind of band protection set declines channel plate | |
| EP0798759A3 (en) | Colour cathode-ray tube | |
| CN205692797U (en) | A kind of microchannel plate possessing protection device | |
| CN105845537A (en) | Microchannel-diameter-variable improved microchannel plate | |
| US8723134B2 (en) | Electrostatic corrector | |
| CN107785223A (en) | A kind of variable modified microchannel plate in microchannel aperture | |
| CN205789867U (en) | A kind of variable orifice footpath declines channel plate | |
| CN105810549B (en) | A kind of horizontal aperture that becomes declines channel plate | |
| KR970017880A (en) | Color awards | |
| KR950027891A (en) | Color cathode ray tube | |
| CN105789017A (en) | Microchannel plate capable of cushioning | |
| CN105892035B (en) | A kind of low ambient noise low-light level night vision device of military anti glare anti static coatings | |
| CN107785224A (en) | It is a kind of can damping microchannel plate | |
| CN107785226A (en) | A kind of horizontal aperture that becomes declines channel plate | |
| CN105789018B (en) | A kind of microchannel plate for possessing embedded protective case | |
| US7714299B2 (en) | Particle detector | |
| KR950027892A (en) | Color cathode ray tube | |
| CN105824114A (en) | Weak-light night-vision device for long-time large-area detection | |
| CN206301073U (en) | A kind of low noise low-light level night vision device for long-time investigation | |
| CN105824115A (en) | Weak-light night-vision device with low background noise | |
| KR960019452A (en) | Electron gun for color cathode ray tube | |
| CN206193337U (en) | Anti highlight hangs down background noise low -light level night vision device | |
| CN107785225A (en) | A kind of microchannel plate for possessing embedded protective case | |
| CN107783271A (en) | A kind of big region investigation low noise type low-light level night vision device of long-time |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |