CN209148877U - A kind of photomultiplier tube test structure - Google Patents
A kind of photomultiplier tube test structure Download PDFInfo
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- CN209148877U CN209148877U CN201821572676.8U CN201821572676U CN209148877U CN 209148877 U CN209148877 U CN 209148877U CN 201821572676 U CN201821572676 U CN 201821572676U CN 209148877 U CN209148877 U CN 209148877U
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- photomultiplier tube
- measurement cavity
- reaction cup
- light
- cavity
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Abstract
The utility model relates to a kind of photomultiplier tubes to test structure, and the measuring chamber side is provided with the fixing seat, and the photomultiplier tube is set in the fixing seat, and the photomultiplier tube is connected with photon counter；There is measurement cavity in the measuring chamber, one end of the measurement cavity is hemispherical, the other end of the measurement cavity is connected on the photomultiplier tube, the connection end of the measurement cavity and photomultiplier tube is equipped with shutter assembly, inserted with reaction cup in the measurement cavity, the reaction cup is not contacted with the measurement cavity inner wall, and the reaction cup is set to the focal point of the domed ends of the measurement cavity.In photomultiplier tube test structure provided by the utility model, reaction cup peripheral region is not directly fitted with cavity face, and the light for avoiding reaction cup from issuing directly is sponged by non-ferrous metal, causes light loss, and the photon that the one side of reaction cup back to photomultiplier tube issues can be reflected, reduce light loss.
Description
Technical field
The utility model relates to medical instruments fields more particularly to a kind of photomultiplier tube to test structure.
Background technique
Measuring chamber is the luminous value for measuring bifurcation pyridine ester in reaction cup in chemiluminescence system, and system is by shining
Value determines the concentration value of sample.In Full-automatic chemiluminescence equipment, the chemical luminescence for liquid in reaction cup enters measurement chamber
Before body, it is initially injected substrate A, measuring chamber cavity is moved into after suitably shaking up, substrate B is reinjected, has collect very much at this time
In light issue, after being acquired by photomultiplier tube by photon counter be passed to computer.The reaction pattern can concentrated very much
Moment (in 30ms) issues a large amount of photons, these photons can lose one since the design of measuring chamber cavity body structure is unreasonable
Point, it is read after then being collected by multiplier tube by counter.Counter is the reading number of photons by way of pulse signal, but due to
The number of photons that moment issues is too many, and the overlapping of pulsing period causes the photon ratio actual value read relatively low, this phenomenon exists
Luminous value is more than to show particularly evident after 1000W, this will result in survey of light inspection liquid of different luminous values from low value to high level
The not high defect of the magnitude linearity.
Utility model content
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of photomultiplier tube tests structure,
It include: measuring chamber, fixing seat and photomultiplier tube, the measuring chamber side is provided with the fixing seat, the photomultiplier tube
It is set in the fixing seat, and the photomultiplier tube is connected with photon counter；
The measuring chamber is interior to have measurement cavity, and one end of the measurement cavity is hemispherical, described to measure the another of cavity
One end is connected on the photomultiplier tube, and the connection end of the measurement cavity and photomultiplier tube is equipped with shutter assembly, institute
It states in measurement cavity inserted with reaction cup, the reaction cup is not contacted with the measurement cavity inner wall, and the reaction cup is arranged
In the focal point of the domed ends of the measurement cavity.
Further improvement is that the fixing seat is equipped with light-measuring hole, and the light-measuring hole is equipped with optical filter.
Further improvement is that the photomultiplier tube side of the light-measuring hole is equipped with boss, and is additionally provided on the light-measuring hole solid
Determine ring, the fixed ring is used to for optical filter being fixed on the boss of the light-measuring hole.
Further improvement, which is that the fixed ring is threadably secured, to be connected on the light-measuring hole.
The beneficial effects of the utility model are:
In photomultiplier tube test structure provided by the utility model, reaction cup peripheral region does not paste directly with cavity face
It closes, the light for avoiding reaction cup from issuing directly is sponged by non-ferrous metal, causes light loss.
In photomultiplier tube test structure provided by the utility model, the cavity body structure of measuring chamber placing response cup is designed to
Bottom surface spherical structure, and be in reaction cup at spherical 1/2 radius (i.e. spherical surface focal point), so that reaction cup is back to photomultiplier transit
The photon that the one side of pipe issues is reflected back in the form of directional light after spheric reflection, as much as possible by photomultiplier transit
Pipe receives, and reduces light loss.
In photomultiplier tube test structure provided by the utility model, increase the filter of Z% before the camera lens of photomultiplier tube
Mating plate (filters the number of photons of Z%), so that the proportional reduction of the photon received by photomultiplier tube, and then reduce and even keep away
Exempt from when photon counter reads pulse signal since light intensity excessively concentrates the pulse signal cycle overlapping phenomenon of appearance；Meanwhile
When calculating number of photons, output test result after the number of photons that photon counter is read is corrected multiplied by 1/Z, the linearity as a result exists
It can achieve the linear dependence with 0.99 or more theoretical value within 2000W luminous value.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural schematic diagram of the photomultiplier tube test structure of the utility model；
Fig. 2 is the measurement cavity body structure schematic diagram of the utility model；
Fig. 3 is the fixed seat structure schematic diagram of the utility model.
Specific embodiment
The utility model is described in further detail presently in connection with attached drawing.These attached drawings are simplified schematic diagram,
Only illustrate the basic structure of the utility model in a schematic way, therefore it only shows composition related with the utility model.
In the description of utility model, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable
The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description utility model and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore should not be understood as the limitation to utility model.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of utility model, the meaning of " plurality " is two or two with
On, unless otherwise specifically defined.
In utility model unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation "
Equal terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood in reality as the case may be
With the concrete meaning in novel.
As depicted in figs. 1 and 2, the utility model provides a kind of photomultiplier tube test structure comprising: measuring chamber 1,
Fixing seat 2 and photomultiplier tube 3,1 side of measuring chamber are fixedly connected with the fixing seat 2, and the photomultiplier tube 3 is installed
In in the fixing seat 2, and the photomultiplier tube 3 is connected with photon counter；
There is measurement cavity 11, one end of the measurement cavity 11 is outstanding to outside measurement cavity in the measuring chamber 1
The other end of hemispherical, the measurement cavity 11 is connected on the photomultiplier tube 3, the measurement cavity 11 and photomultiplier transit
The connection end 13 of pipe 3 be equipped with shutter assembly 4, the shutter assembly be used for control measurement cavity and photomultiplier tube connection and
It is no, inserted with reaction cup 100, the direction of insertion of the reaction cup 100, perpendicular to the measurement cavity in the measurement cavity 11
11 to photomultiplier tube 3 extending direction, the reaction cup 100 is not contacted with 11 inner wall of measurement cavity, and the reaction
Cup 100 is set to the focal point of the domed ends 12 of the measurement cavity 11.
As shown in figure 3, being further improved is that the fixing seat 2 is equipped with light-measuring hole 21, the light-measuring hole 21 is equipped with filter
Mating plate 5, the optical filter 5 are used to filter out the number of photons of the Z% of reaction cup sending.
Further improvement is that the photomultiplier tube side of the light-measuring hole 21 is equipped with boss 22, and on the light-measuring hole 21 also
Equipped with fixed ring 6, the fixed ring 6 is pressed in the edge of optical filter 5, for optical filter 5 to be fixed on to the institute of the light-measuring hole 21
It states on boss 22, meanwhile, annular fixed ring 6 will not block light-measuring hole 21.
Further improvement, which is that the fixed ring 6 is threadably secured, to be connected on the light-measuring hole 21.
In photomultiplier tube test structure provided by the utility model, reaction cup peripheral region does not paste directly with cavity face
It closes, the light for avoiding reaction cup from issuing directly is sponged by non-ferrous metal, causes light loss.
In photomultiplier tube test structure provided by the utility model, the cavity body structure of measuring chamber placing response cup is designed to
Bottom surface spherical structure, and be in reaction cup at spherical 1/2 radius (i.e. spherical surface focal point), so that reaction cup is back to photomultiplier transit
The photon that the one side of pipe issues is reflected back in the form of directional light after spheric reflection, as much as possible by photomultiplier transit
Pipe receives, and reduces light loss.
The utility model additionally provides a kind of luminous value based on photomultiplier tube described in any of the above embodiments test structure
Measurement method comprising following steps:
The reaction cup for being injected with light inspection liquid and the first substrate (substrate A) is put into the cavity of measuring chamber by A, and reaction cup position
In the focal point of the hemispherical end of cavity；
B opens shutter assembly, and the second substrate (substrate B) is injected into reaction cup；
C photomultiplier tube collects light of the reaction cup towards the photomultiplier tube side photon issued and hemispherical end reflection
Son；
D photon counter reads number of photons.
Further improvement is that light-measuring hole is equipped in the fixing seat of photomultiplier tube, and the light-measuring hole is equipped with filter ratio
Example is the optical filter of Z%, and when calculating luminous value, the number of photons that photon counter is read is multiplied by 1/Z.
In luminous value measurement method provided by the utility model, increase the optical filter of Z% before the camera lens of photomultiplier tube
(filtering the number of photons of Z%), so that the proportional reduction of the photon received by photomultiplier tube, and then reduce and even avoid light
Since light intensity excessively concentrates the pulse signal cycle overlapping phenomenon of appearance when sub-count device reads pulse signal；Meanwhile it calculating
When number of photons, output test result after the number of photons that photon counter is read is corrected multiplied by 1/Z, the linearity as a result exists
It can achieve the linear dependence with 0.99 or more theoretical value within 2000W luminous value.
It is enlightenment, through the above description, related work people with the above-mentioned desirable embodiment according to the utility model
Member can carry out various changes and amendments in the range of without departing from this item utility model technical idea completely.This item is real
It is not limited to the contents of the specification with novel technical scope, it is necessary to its technology is determined according to scope of the claims
Property range.
Claims (4)
1. a kind of photomultiplier tube tests structure characterized by comprising measuring chamber, fixing seat and photomultiplier tube, the survey
Amount room side is provided with the fixing seat, and the photomultiplier tube is set in the fixing seat, and the photomultiplier tube connects
It is connected to photon counter；
There is measurement cavity, one end of the measurement cavity is hemispherical, the other end of the measurement cavity in the measuring chamber
It is connected on the photomultiplier tube, the connection end of the measurement cavity and photomultiplier tube is equipped with shutter assembly, the survey
It measures in cavity inserted with reaction cup, the reaction cup is not contacted with the measurement cavity inner wall, and the reaction cup is set to institute
State the focal point of the domed ends of measurement cavity.
2. photomultiplier tube according to claim 1 tests structure, which is characterized in that the fixing seat, which is equipped with, surveys light
Hole, the light-measuring hole are equipped with optical filter.
3. photomultiplier tube according to claim 2 tests structure, which is characterized in that the photomultiplier tube of the light-measuring hole
Side is equipped with boss, and fixed ring is additionally provided on the light-measuring hole, and the fixed ring is used to optical filter being fixed on the light-measuring hole
The boss on.
4. photomultiplier tube according to claim 3 tests structure, which is characterized in that the fixed ring is threadably secured
It is connected on the light-measuring hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821572676.8U CN209148877U (en) | 2018-09-26 | 2018-09-26 | A kind of photomultiplier tube test structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821572676.8U CN209148877U (en) | 2018-09-26 | 2018-09-26 | A kind of photomultiplier tube test structure |
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| Publication Number | Publication Date |
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| CN209148877U true CN209148877U (en) | 2019-07-23 |
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| CN201821572676.8U Active CN209148877U (en) | 2018-09-26 | 2018-09-26 | A kind of photomultiplier tube test structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374258A (en) * | 2018-09-26 | 2019-02-22 | 苏州长光华医生物医学工程有限公司 | A kind of photomultiplier tube test structure and luminous value measurement method |
-
2018
- 2018-09-26 CN CN201821572676.8U patent/CN209148877U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109374258A (en) * | 2018-09-26 | 2019-02-22 | 苏州长光华医生物医学工程有限公司 | A kind of photomultiplier tube test structure and luminous value measurement method |
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