CN111060207A - Photomultiplier packaging cavity - Google Patents
Photomultiplier packaging cavity Download PDFInfo
- Publication number
- CN111060207A CN111060207A CN201911326868.XA CN201911326868A CN111060207A CN 111060207 A CN111060207 A CN 111060207A CN 201911326868 A CN201911326868 A CN 201911326868A CN 111060207 A CN111060207 A CN 111060207A
- Authority
- CN
- China
- Prior art keywords
- light
- photomultiplier
- metal cavity
- hole
- chamber
- 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.)
- Pending
Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 28
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical group [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J11/00—Measuring the characteristics of individual optical pulses or of optical pulse trains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention discloses a photomultiplier packaging cavity which comprises a metal cavity body, a shielding piece and a transmission structure, wherein the metal cavity body is provided with a light through hole, a photomultiplier is arranged in the metal cavity body, a light sensing area of the photomultiplier is arranged at the light through hole and can receive emitted light, and the shielding piece is inserted into the metal cavity body through the transmission structure to realize the sealing or opening of the light through hole. The invention is suitable for small photoelectric detection instruments.
Description
Technical Field
The invention relates to an optical signal testing instrument, in particular to a photomultiplier packaging cavity.
Background
The optical signal is the most common signal to be measured, and the photoelectric effect provided by einstein lays a theoretical foundation for optical measurement. The photoelectric effect indicates that light is composed of discrete photons, and a substance absorbs a light signal and converts the light signal into a certain amount of electrons. The optical measurement technique is essentially an electrical signal measurement, which refers to the absorption of photons by a detector. After the detector absorbs photons, regardless of its operating principle, the resulting electrical signal front represents the number of photons absorbed by the detector in a given time. Common detector core elements are silicon photodiodes, photomultiplier tubes and avalanche diodes, depending on the principle of operation. The photomultiplier and the avalanche diode have good sensitivity and detectivity, and the photomultiplier has more excellent signal-to-noise ratio, so the photomultiplier is widely applied to the field of weak light signal detection. The photomultiplier is particularly sensitive, so that particular attention must be paid to avoiding interference of ambient light and electromagnetic types during optical testing, and packaging of the photomultiplier is a necessary measure. In addition, the photomultiplier tube needs to be exposed to the light signal during operation; and during the working gap, when a sample to be measured needs to be adjusted, the photomultiplier needs to be in a darkroom environment, otherwise, strong ambient light can cause damage to the photomultiplier, and therefore, the intelligent switch is designed to control the opening and closing of the packaging cavity of the photomultiplier to be a part of normal work.
The common photomultiplier packaging cavity switch is electronic and is controlled to be closed through a pressure-sensitive switch. The switch is sensitive, but the price is high, a special pressure-sensitive switch and a circuit need to be designed, the switch is complex, and in comparison, the mechanical switch is simple and efficient, and is more suitable for the development of small instruments.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention provides a photomultiplier tube packaging cavity, which is suitable for a small photomultiplier tube by adopting a mechanical photomultiplier tube packaging cavity and controls the photomultiplier tube packaging cavity to be closed by closing a shielding piece.
The invention adopts the following technical scheme:
the utility model provides a photomultiplier encapsulation chamber, includes the metal cavity, shelters from piece and drive structure, the metal cavity is opened there is a logical unthreaded hole, set up photomultiplier in the metal cavity, and photomultiplier's photosensitive area sets up and can accept the transmission light in logical unthreaded hole department, shelter from the piece and insert the realization in the metal cavity through drive structure and lead to the sealing or opening of unthreaded hole.
The transmission structure comprises transmission rods, springs and a pressing block, two guide grooves are formed in the metal cavity, the two transmission rods move up and down in the metal cavity through the guide grooves, the springs are sleeved on the two transmission rods respectively, and the pressing block is installed at the upper end of each transmission rod.
The shielding piece is vertically arranged.
The inner surface of the metal cavity is plated with gold.
The invention realizes the closing or opening of the light through hole, and specifically comprises the following steps: pressing the pressing block to enable the transmission rod to be inserted into the metal cavity under the action of pressure to drive the light screen to move downwards to seal the light through hole;
when the press block is loosened, the transmission rod drives the light screen to move upwards under the action of the restoring force of the spring, and the light through hole is opened, so that the light sensing area of the photomultiplier receives the emitted light and is in a working state.
The invention has the beneficial effects that:
the photomultiplier packaging cavity keeps the light sensing area of the photomultiplier closed through a mechanical switch, is simple and efficient, has low cost and is suitable for small-sized photoelectric detectors.
Drawings
FIG. 1 is a perspective view of the present invention;
FIGS. 2(a), 2(b) and 2(c) are front, left and top views of the transmission rod and the light shielding plate;
fig. 3(a), 3(b) and 3(c) are front, left and top views of the metal cavity and the cavity sealing cover.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Examples
As shown in fig. 1, fig. 2(a), fig. 2(b), fig. 2(c), fig. 3(a), fig. 3(b), and fig. 3(c), a photomultiplier packaging chamber includes a metal chamber 5, a shielding plate 2, and a transmission structure, wherein a light-passing hole 4 is formed in the metal chamber 5, a sealing cover 6 is disposed on the metal chamber, that is, one end of the light-passing hole is sealed by the sealing cover, the light-passing hole 4 is a transverse light-passing hole, a photomultiplier is disposed in the metal chamber, and a photosensitive region of the photomultiplier is disposed in the light-passing hole and can receive and transmit light. The transmission structure comprises a pressing block, two transmission rods 1 and two springs 3, the pressing block is fixed above the two transmission rods, the top surface of the metal cavity is provided with a groove, and the two transmission rods are inserted into the cavity through the two grooves respectively to move vertically.
The two springs are respectively sleeved at the bottoms of the two transmission rods, and when the pressing block is pressed, the transmission rods are inserted into the metal cavity, and the springs are pressed. The shielding piece is vertically arranged between the pressing block and the top surface of the metal cavity, the shielding piece is a movable metal piece, and the metal cavity is provided with a gap corresponding to the shielding piece, so that the shielding piece vertically moves in the metal cavity and is used for shielding a photosensitive area of the photomultiplier.
The metal cavity is a main body part of the packaging cavity and is used for packaging parts except a light sensitive area of the photomultiplier, the metal material is preferred, and the gold plating is preferred for the interior.
The springs are two springs fixed at the bottom of the shielding piece and used for absorbing pressure generated by downward movement of the shielding piece. When the sample cavity is opened, the restoring force of the spring piece drives the shielding piece to move upwards to open the light through hole.
The working process of the invention is as follows:
pressing the pressing block to enable the transmission rod to be inserted into the metal cavity under the action of pressure to drive the light screen to move downwards to seal the light through hole;
when the press block is loosened, the transmission rod drives the light screen to move upwards under the action of the restoring force of the spring, and the light through hole is opened, so that the light sensing area of the photomultiplier receives the emitted light and is in a working state.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (5)
1. The utility model provides a photomultiplier encapsulation chamber which characterized in that includes the metal cavity, shelters from piece and drive structure, the metal cavity is opened there is a logical unthreaded hole, set up photomultiplier in the metal cavity, and photomultiplier's photosensitive area sets up and can accept the transmission light in logical unthreaded hole department, shelter from the piece and insert the realization in the metal cavity through drive structure and seal or open to leading to the unthreaded hole.
2. The photomultiplier tube package chamber of claim 1, wherein the transmission structure comprises a transmission rod, a spring and a pressing block, the metal chamber is provided with two guide slots, the two transmission rods move up and down in the metal chamber through the guide slots, the two transmission rods are respectively sleeved with the spring, and the pressing block is mounted at the upper end of the transmission rod.
3. The photomultiplier tube package chamber of claim 1 wherein the shutter is vertically disposed.
4. The photomultiplier tube package of claim 1 wherein the inner surface of the metal cavity is gold plated.
5. The photomultiplier tube packaging chamber according to claim 2, wherein the light-passing hole is closed or opened by: pressing the pressing block to enable the transmission rod to be inserted into the metal cavity under the action of pressure to drive the light screen to move downwards to seal the light through hole;
when the press block is loosened, the transmission rod drives the light screen to move upwards under the action of the restoring force of the spring, and the light through hole is opened, so that the light sensing area of the photomultiplier receives the emitted light and is in a working state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911326868.XA CN111060207A (en) | 2019-12-20 | 2019-12-20 | Photomultiplier packaging cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911326868.XA CN111060207A (en) | 2019-12-20 | 2019-12-20 | Photomultiplier packaging cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111060207A true CN111060207A (en) | 2020-04-24 |
Family
ID=70302433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911326868.XA Pending CN111060207A (en) | 2019-12-20 | 2019-12-20 | Photomultiplier packaging cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111060207A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006154376A (en) * | 2004-11-30 | 2006-06-15 | Nikon Corp | Microscope |
| CN201974432U (en) * | 2011-02-14 | 2011-09-14 | 四川迈克生物科技股份有限公司 | Automation equipment used for optical signal detection |
| WO2014078349A1 (en) * | 2012-11-13 | 2014-05-22 | Awareness Technology Inc. | Measuring luminescence and absorbance and apparatus therefor |
| CN108992921A (en) * | 2018-10-16 | 2018-12-14 | 东莞市名键电子科技有限公司 | Photoelectricity handle rocker component |
| CN208795985U (en) * | 2018-08-06 | 2019-04-26 | 佛山市中菱智控科技有限公司 | A kind of industrial machinery shutter for optical detection |
-
2019
- 2019-12-20 CN CN201911326868.XA patent/CN111060207A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006154376A (en) * | 2004-11-30 | 2006-06-15 | Nikon Corp | Microscope |
| CN201974432U (en) * | 2011-02-14 | 2011-09-14 | 四川迈克生物科技股份有限公司 | Automation equipment used for optical signal detection |
| WO2014078349A1 (en) * | 2012-11-13 | 2014-05-22 | Awareness Technology Inc. | Measuring luminescence and absorbance and apparatus therefor |
| CN208795985U (en) * | 2018-08-06 | 2019-04-26 | 佛山市中菱智控科技有限公司 | A kind of industrial machinery shutter for optical detection |
| CN108992921A (en) * | 2018-10-16 | 2018-12-14 | 东莞市名键电子科技有限公司 | Photoelectricity handle rocker component |
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| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200424 |
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| WD01 | Invention patent application deemed withdrawn after publication |