CN207557495U - A kind of light guide and nuclear detector - Google Patents
A kind of light guide and nuclear detector Download PDFInfo
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- CN207557495U CN207557495U CN201721486596.6U CN201721486596U CN207557495U CN 207557495 U CN207557495 U CN 207557495U CN 201721486596 U CN201721486596 U CN 201721486596U CN 207557495 U CN207557495 U CN 207557495U
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Abstract
The utility model provides a kind of light guide and nuclear detector, light guide includes the light guide item of several sequentials, each light guide item has the opposite big face of light guide item and light guide facet, the length of side of the big face of light guide item and light guide facet is divided into several different brackets, the big face of light guide item forms upper surface, lower surface is parallel to upper surface, all light guide facets form lower surface, the quantity in the big face of light guide item is identical with the quantity of light guide facet, the area of lower surface is less than the area of upper surface, side connection upper and lower surface.Nuclear detector further includes scintillation crystal array, the upper surface of light guide is coupled with scintillation crystal lower surface, the lower surface of light guide is coupled with electrooptical device, the quantity in the big face of light guide item is identical with the quantity of light guide facet, the area of lower surface is less than the area of upper surface, and the length of side in the big face of light guide item is not less than the length of side of scintillation crystal item.The utility model is of low cost, and photon loss rate is low, while edge crystal item can also realize clear resolution.
Description
Technical field
The utility model is related to radiation detection and positron emission computerized tomography fields, relate more specifically to one kind
Light guide and nuclear detector.
Background technology
In gammacamera, positron emission computerized tomography (abbreviation PET, Positron Emission
Tomography) in the nuclear detection equipment such as system, radiation detecting instrument and crystal property detection device, the spatial discrimination of nuclear detector
Rate is to embody an important indicator of nuclear detection equipment performance.For example, in PET system, spatial resolution embodies PET system
It is one of index mostly important in PET system to the space identification capability of microscopic structure, is also evaluation PET image matter simultaneously
One of important indicator of amount.A kind of PET system evaluation criterion most basic as image system is the quality of reconstruction image, high-quality
The reconstruction image of amount requires have good resolution ratio, and spatial resolution is emphasis always in PET system exploitation during the last ten years in the past
The object of optimization.
In PET system, the internal space resolution ratio of pet detector be the key that influence system imaging space resolution ratio because
One of element.The internal space resolution ratio of pet detector, which reflects pet detector, can distinguish minimum range between two point sources.
For the pet detector built based on array crystals, internal space resolution ratio includes 1/2 crystal width and decoding differentiate because
Son, therefore, for the pet detector built based on array crystals, crystal width is typically considered in pet detector in sky
Between resolution ratio leading factor.In the animal PET for the more cutting the more thin in crystal item, in order to further enhance the inherence of pet detector
Spatial resolution, the importance for decoding resolution factor are more obvious.An important factor in order for decoding resolution factor is front end
The design method of detector, therefore, the design method of front-end detector is to promoting the internal space resolution ratio of pet detector also ten
Divide important.
Nuclear detector of the spatial resolution less than 2.0mm is usually known as high spatial resolution nuclear detection in the prior art
Device, in current high spatial resolution nuclear detector, a kind of important front-end detector designing scheme is using array crystals item
Direct-coupling photomultiplier (PMT) or array crystals item 1:Photo multiplier device, position are coupled again after 1 coupling array light guide
Reading is put using position sensing type photomultiplier (abbreviation PSPMT) or multi-anode photomultiplier, so as to reduce coupling side
Influence of the formula to decoding resolution factor.More specifically, the front-end detector designing scheme usually has following several designing schemes：
The first, by conical scintillation crystal array direct-coupling photo multiplier device, it is expected to solve the flicker of large area
The problem of photon amount signal-to-noise ratio that crystal array generates when being coupled with the photo multiplier device of smaller detection area declines, it is this to set
Meter can reduce the gap between pet detector, and obtain higher light output in PET system level, be visited so as to promote PET
It surveys the energy resolution of device and meets temporal resolution (Jun Zhu, Qingguo Xie, Ming Niu et al.Potential
Advantages of Tapered Detector in PET,IEEE,in Conference Record of the
2011IEEE Nuclear Science Symposiumand Medical Imaging Conference[C],pp.3042-
3044,2011)。
Second, scintillation crystal array is coupled to form using conventional cuboid crystal item, scintillation crystal array elder generation coupling
One-to-one taper crystal is closed, for example, organic glass or quartz glass array, then couple photo multiplier device again.It is this
Coupled modes can solve the problems, such as data gather disappearance present in taper crystal, improve the sensitivity of PET system, promoted and rebuild
Picture quality.Meanwhile this method is more simple to the processing of scintillation crystal item, facilitates the higher precision for realizing and processing and cutting,
Break away from the irregular processing technology of module such as taper crystal and difficulty problem.
However, also there are many shortcomings in above-mentioned pet detector design, for example, for the first designing scheme,
When PET system integrates, which can cause data gather disappearance, reduce system sensitivity, and since taper is dodged
The difficulty of processing higher of the irregular crystals items such as bright crystal array can cause yield rate in crystal process to reduce, crystal
The proportion of goods damageds increase, and conical scintillation crystal array cost increases.And for second of designing scheme, based on cuboid-type crystal array
Coupling corresponds taper crystal and couples photomultiplier again, and the light guide of taper crystal is longer, and photon loses in transmission process
Rate is higher, influences the signal-to-noise ratio of optical signal, wherein, the light loss rate at taper crystal array edge is especially high, part edge crystal
Item can not even offer a clear explanation.
Therefore, for above-mentioned technical problem, it is necessary to propose that one kind is of low cost, photon loss rate is low, while edge is brilliant
The nuclear detector that body item also can be differentiated clearly is to overcome drawbacks described above.
Utility model content
The purpose of this utility model is to provide a kind of nuclear detector, cannot be taken into account so as to solve nuclear detector in the prior art
The problem of low cost and high spatial resolution.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is to provide a kind of light guide and nuclear detector, this
The light guide that utility model provides includes：Several light guide items, the light guide sequential form the light guide, each light
Conducting bar has the opposite big face of light guide item and light guide facet, and the length of side in the big face of light guide item is divided into several different brackets,
The length of side of the light guide facet is divided into several different brackets；Upper surface, the big face of all light guide items are formed on described
Surface；Lower surface, the lower surface are parallel to the upper surface, and all light guide facets form the lower surface, institute
The quantity for stating the big face of light guide item is identical with the quantity of the light guide facet, and the area of the lower surface is less than the upper surface
Area；And side, the side connect the upper surface and the lower surface.
The side of the light guide includes first side and second side, and the first side is from the following table towards on described
Surface direction extension, the second side from the upper table towards the direction of the lower surface extend, the first side and
The second side forms chamfering, and the chamfering is obtuse angle.
The distance of upper surface described in the vertex distance of chamfering is 0.1mm-2mm.
Upper surface and the lower surface are rectangle, and the big face of light guide item and the light guide facet are cut into square
Shape.
The big face of light guide item of the different brackets length of side is with the light guide facet of the different brackets length of side respectively along institute
The length of side for stating the big face of light guide item and the light guide facet is arranged symmetrically.
Upper surface and the lower surface are round, trapezoidal or oval, along the outermost light guide of the light guide
The big face of item and the light guide facet are cut into irregular shape, remaining big face of light guide item and the light guide facet
It is cut into rectangle.
Impermeable stimulative substance is coated between light guide item.
The height of light guide is between 0.1mm-13mm.
Nuclear detector provided by the utility model with light guide, including：Scintillation crystal array, the scintillation crystal array
Scintillation crystal item including several sequentials and same specification, the scintillation crystal array have scintillation crystal upper surface and
Scintillation crystal lower surface；And the light guide, the light guide include：Several light guide items, the mutually arranged composition of light guide item
The light guide, each light guide item have the opposite big face of light guide item and light guide facet, the length of side in the big face of light guide item
It is divided into several different brackets, the length of side of the light guide facet is divided into several different brackets, the side in the big face of light guide item
The long length of side not less than the scintillation crystal item；Upper surface, the big face of all light guide items form the upper surface, it is described on
Surface is coupled with the scintillation crystal lower surface；Lower surface, the lower surface are parallel to the upper surface, the lower surface and light
Power conversion device couples, and all light guide facets form the lower surface, the quantity in the big face of light guide item with it is described
The quantity of light guide facet is identical, and the area of the lower surface is less than the area of the upper surface；And side, the side connect
Connect the upper surface and the lower surface.
The side of light guide includes first side and second side, and the first side is from the following table towards the upper surface
Direction extension, the second side extends from the upper table towards the direction of the lower surface, the first side and described
Second side forms chamfering, and the chamfering is obtuse angle.
The distance of upper surface described in the vertex distance of chamfering is 0.1mm-2mm.
Upper surface and the lower surface are rectangle, and the big face of light guide item and the light guide facet are cut into square
Shape.
The big face of light guide item of the different brackets length of side is with the light guide facet of the different brackets length of side respectively along institute
The length of side for stating the big face of light guide item and the light guide facet is arranged symmetrically.
Upper surface and the lower surface are round, trapezoidal or oval, along the outermost light guide of the light guide
The big face of item and the light guide facet are cut into irregular shape, remaining big face of light guide item and the light guide facet
It is cut into rectangle.
Impermeable stimulative substance is coated between light guide item.
The height of light guide is between 0.1mm-13mm.
Light guide and nuclear detector provided by the utility model, improve tapered light guides, employ the light guide of wedge
Array, the length of shortening light guide that can be by a relatively large margin, reduces light loss rate, optical signal signal-to-noise ratio is improved, especially to crystalline substance
The light loss rate reduction at volume array edge is more, can all distinguish the position spectrum of edge crystal, be visited in PET system or radiation
Measurement equipment will not cause data gather disappearance when integrated, will not reduce system sensitivity.Meanwhile light splitting is led in the middle part of the utility model
The width of item is the width more than crystal item, so as to reduce the quantity of light guide item, and the processing yields of light guide crystal
Higher advantageously reduces the cost of nuclear detector.
Description of the drawings
Fig. 1 is the side schematic view of the light guide of one embodiment according to the present utility model；
Fig. 2 is the top schematic diagram according to the light guide of Fig. 1；
Fig. 3 is the schematic bottom view according to the light guide of Fig. 1；
Fig. 4 is the side schematic view of the nuclear detector of one embodiment according to the present utility model；
Fig. 5 is the side schematic view according to the nuclear detector of the utility model another embodiment；
Fig. 6 is the side schematic view according to the nuclear detector of the utility model another embodiment；
Fig. 7 is the side schematic view according to the nuclear detector of the utility model another embodiment；
Fig. 8 is the position spectrogram picture acquired in the nuclear detector of one embodiment according to the present utility model.
Specific embodiment
Below in conjunction with specific embodiment, the utility model is described further.It should be understood that following embodiment is only used for
The range that bright the utility model rather than limits the present invention.
Fig. 1 is according to the front schematic view of the light guide 1 of a preferred embodiment of the utility model, and Fig. 2 is according to Fig. 1's
The top schematic diagram of light guide, Fig. 3 are according to the schematic bottom view of the light guide of Fig. 1, by Fig. 1 combinations Fig. 2, Fig. 3 it is found that this practicality is new
The light guide 1 that type provides includes opposite upper surface 11 and lower surface 12, and the area of upper surface 11 is more than the area of lower surface 12, light
Lead 1 side for further including connection upper surface 11 and lower surface 12.In Fig. 2 and embodiment shown in Fig. 3, upper surface 11 and following table
Face 12 is square, and the four edges of upper surface 11 and lower surface 12 correspond, that is to say, that the four edges of upper surface 11
It is respectively parallel to 12 corresponding four edges of lower surface；Side includes first side 13 and second side 14, wherein, first side 13
Extend from the four edges of lower surface 12 to the direction of upper surface 11, second side 14 is from the four edges of upper surface 11 to lower surface 12
Direction extension, formed between the first surface 13 and second surface 14 between upper surface 11 and the side of lower surface 12 corresponding two
Chamfer angle θ.More specifically, in the embodiment shown in fig. 1, second side 14 and upper surface 11 and lower surface 12 are vertical, θ is blunt
Angle.
Further, light guide 1 is cut into several light guide items, wherein, along the direction on any bar side of upper surface, light
The upper surface for leading 1 is cut into several big faces of light guide item, and the length in two big faces of light guide item at both ends is equal to corresponding flicker
The width of crystal item, the length in intermediate two big faces of light guide item is equal to the length in the big face of light guide item at both ends, along this side
Other big faces of light guide item length be more than both ends the big face of light guide item length；Similarly, along any bar of lower surface
The direction on side, the lower surface of light guide 1 are cut into several light guide facets, wherein, the length of two light guide facets at both ends
Degree is equal to the length in the corresponding big face of light guide item, and the length of intermediate two light guide facets is less than the light guide facet at both ends
Length is more than the length of the light guide facet at both ends along the length of other light guide facets on this side.
In the embodiment of Fig. 1-Fig. 3, light guide 1 is cut into 10 × 10 light guide items, and the upper surface 11 of light guide 1 is cut
For the big face of light guide item of 10 × 10 rectangles, wherein, along the direction of the arbitrary a line of upper surface 11, two light guides at both ends
The length of the big face A1 of item is substantially equal to the width (Fig. 4) of the single scintillation crystal item 24 in corresponding scintillation crystal array 2, intermediate
The big face A1 of two light guide items length be equal to both ends the big face A1 of light guide item length, along other light guide items on this side
The length of big face A2 is more than the length of the big face A1 of light guide item at both ends, the big face A3 of light guide item in the upper surface 11 cut in this way
Length be equal to the length of the big face A2 of light guide item, the width of the big face A3 of light guide item is equal to the width of the big face A2 of light guide item, light guide item
The length direction of big face A3 is perpendicular to the length direction of the big face A2 of light guide item；The length and width of the big face A4 of light guide item is equal to light
The length of the big face A2 or A3 of conducting bar；Similarly, the lower surface 12 of light guide 1 is cut into the light guide facet of 10 × 10 rectangles,
Along the direction on any bar side of lower surface 12, the length of two light guide facet B1 at both ends is equal to the corresponding big face of light guide item
The length of A1, the length of intermediate two light guide facet B5 is less than the length of the light guide facet B1 at both ends, along this side
Other light guide facet B2 length be more than both ends light guide facet B1 length, the lower surface 12 cut in this way
The length of middle light guide facet B3 is equal to the length of light guide facet B2, and the width of light guide facet B3 is equal to light guide facet B5
Width, the length direction of light guide facet B3 is perpendicular to the length direction of light guide facet B2；The length of light guide facet B4
The length of light guide facet B2 or B3 is equal to width；The length of light guide facet B6 is equal to the length of light guide facet B2 or B4
Degree, the width of light guide facet B6 are equal to the length of light guide facet B5.
More specifically, in the specific embodiment of Fig. 1-Fig. 3, the length of the upper surface big face A1 of 11 glazing conducting bar of light guide 1
It is 1.9mm with width, the length and width of light guide item big face A2, A3 is respectively 2.9mm, 1.9mm, the length of the big face A4 of light guide item
Degree and width are 2.9mm；The length and width of 12 glazing conducting bar facet B1 of lower surface is 1.9mm, light guide facet B2's
Length and width is respectively 2.2mm, 1.9mm, and the length and width of light guide facet B3 is respectively 2.2mm, 1.5mm, light guide item
The length and width of facet B4 is 2.2mm, and the length and width of light guide facet B5 is 1.5mm, light guide facet B6's
Length and width is respectively 2.2mm, 1.5mm.Therefore, the size of the single scintillation crystal item of corresponding cuboid for 1.89mm ×
1.89mm × 13mm, the upper surface area of light guide 1 is 26.5 × 26.5mm2, lower surface area is 21.5 × 21.5mm2；Light guide
It is highly 5.5mm, a line of chamfer angle θ is vertical with upper surface, and the distance of the vertex distance upper surface of chamfering is 1.5mm.It should
It is noted that in order to meet the needs of different image quality, the distance of the vertex distance upper surface of chamfering can be cut according to difference
Cut the arbitrary value that technique is set as between 0.1mm-2mm.
Fig. 4 is the side schematic view coupled according to the light guide 1 of Fig. 1 with corresponding scintillation crystal array 2, as shown in Figure 4, this
Utility model also provides a kind of nuclear detector using above-mentioned light guide, which includes the light guide 1 to intercouple and flicker
Crystal array 2, scintillation crystal array 2 include several scintillation crystal items 24, upper surface 11 and the scintillation crystal array 2 of light guide 1
Lower surface 22 couple, the lower surface 12 of light guide 1 is with electrooptical device (not shown) and electronics readout equipment (in figure
Do not show) connection, the side 23 of scintillation crystal array 2 is concordant with the side 14 of light guide, and the upper surface 21 of scintillation crystal array 2 is used for
The radiated photons with detection are received, for example gammaphoton, neutron etc., scintillation crystal array are converted to above-mentioned radiated photons visible
Light, light guide 1 is used to above-mentioned visible ray being preferably transferred to electrooptical device, so that electrooptical device can be more accurate
True will be seen that optical signal is converted to electric signal to carry out image reconstruction.It will be apparent to a skilled person that this practicality
Electrooptical device and electronics readout equipment in novel nuclear detector can select different configurations or type as needed
Number, this belongs to the common knowledge of this field, and details are not described herein.
Further, in Fig. 4, scintillation crystal array 2 includes 13 × 13 scintillation crystal items 24, every scintillation crystal
The section of item 24 is square, and the size of single scintillation crystal item is 1.89mm × 1.89mm × 13mm, light guide 1 and scintillation crystal
When array 2 couples, in the profile direction of the length of side along light guide 1, the length A1 in the big face of light guide item at both ends is substantially equal to single
The length of side of scintillation crystal item 24 is essentially the length of side of single scintillation crystal item 24 close to the length of the big face A2 of outermost light guide item
1.5 times, in other words, the outermost big face of light guide item is with the in the same size of single scintillation crystal item, the big face of second layer light guide item
Second scintillation crystal item of direct-coupling and 1/2 third root scintillation crystal item, the big face direct-coupling of third layer light guide item 1/2
Third root scintillation crystal article and the 4th scintillation crystal article, the 4th layer of light guide couple the 5th scintillation crystal article and 1/2 the 6th
Root scintillation crystal item, the big face of layer 5 light guide article couple 1/2 six roots of sensation scintillation crystal article and 1/2 the 7th scintillation crystal
Item, and light guide is due to for symmetrical structure, behind five layers of big face of light guide item and the big face axial symmetry of five layers of front light guide item, therefore, if
The width of scintillation crystal item is w, and scintillation crystal array includes 13 × 13 scintillation crystal items, then the length of side of the upper surface of light guide is
(w+1.5w+1.5w+1.5w+w+w+1.5w+1.5w+1.5w+w)=13w.
It will be apparent to a skilled person that upper surface 11 and lower surface 12 can also be other shapes, such as round
The shapes such as shape, rectangle, trapezoidal, oval, at this point, the shape of the outermost light guide item of light guide is different from above-described embodiment,
The cutting of the light guide item of light guide internal layer and shape and all same in above-described embodiment, details are not described herein.
According to the utility model other embodiment, side may also be formed as smoothly prolonging from upper surface 11 to lower surface 12
It stretches, can be considered θ at this time is 180 °；Side can also be formed as more than two first sides, second side ..., n-th (n is
Natural number) side is connected with each other, at this point, shared (n-1) a θ.
Fig. 5 be according to the side schematic view of the nuclear detector of the utility model another embodiment, wherein, same section
Reference numeral by addition 100 digital representation, scintillation crystal array 102 include 13 × 13 scintillation crystal items 124, Fig. 5 with
The difference of Fig. 4 is：In light guide 1 shown in Fig. 4, the width of scintillation crystal item is the light guide item of w, 1.5w and 1.0w width
Arrangement mode is different, and 4 layers of 1.0w light guide arrangement modes are shown in Fig. 4, and Fig. 5, which is then shown, contains only 1 layer of 1.0w light guides item row
Row mode.It should be noted that the quantity of 1.0w width light guide items is between 0 layer to 4 layers.Scintillation crystal array 102 it is total
Size is 26.5 × 26.5 × 13.3mm3, the size of single scintillation crystal item is 1.89 × 1.89 × 13mm3.Light guide 101 it is upper
The area on surface is also 26.5 × 26.5mm2, the area of lower surface is 21.5 × 21.5mm2, light guide 101 is in total by 9 × 9 light
Conducting bar is coupled to form, and in this arrangement mode, the width of outermost light guide item is set to 1.5w, along length of side direction
Width is arranged as 1.5w+1.5w+1.5w+1.5w+w+1.5w+1.5w+1.5w+1.5w, can only be passed with the light guide item of 9 × 9
13 × 13 scintillation crystal array is led, achievees the effect that correspond coupling.
Fig. 6 be according to the side schematic view of the nuclear detector of the utility model another embodiment, wherein, same section
Reference numeral includes 16 × 16 scintillation crystal items 224 by the digital representation of addition 200, scintillation crystal array 202, and flicker is brilliant
The overall size of volume array 202 is 23.5 × 23.5 × 13.3mm3, the size of single scintillation crystal item is 1.3 × 1.3 × 10mm3；
The area of the upper surface of light guide is also 23.5 × 23.5mm2, the area of lower surface is 19.5 × 19.5mm2, light guide in total by 12 ×
12 light guide items are coupled to form, and in this arrangement mode, light guide includes the light guide item of 4 layers of 1.0w width, outermost light guide
Item is also configured to the width of 1.0w, and w+1.5w+1.5w+1.5w+1.5w+w+w+1.5w is arranged as along the width in length of side direction
+ 1.5w+1.5w+1.5w+w can conduct 16 × 16 scintillation crystal array with 12 × 12 optical fiber array, reach one-to-one correspondence
The effect of coupling.
Fig. 7 be according to the side schematic view of the nuclear detector of the utility model another embodiment, wherein, same section
Reference numeral includes 16 × 16 scintillation crystal items 324 by the digital representation of addition 300, scintillation crystal array 302, and flicker is brilliant
The overall size of volume array 302 is 23.5 × 23.5 × 13.3mm3, the size of single scintillation crystal item is 1.3 × 1.3 × 10mm3；
The area of the upper surface of light guide is also 23.5 × 23.5mm2, the area of lower surface is 19.5 × 19.5mm2, light guide in total by 12 ×
12 light guide items are coupled to form, and in this arrangement mode, light guide includes the light guide item of 4 layers of 1.0w width, outermost light guide
Item is configured to the width of 1.5w, and 1.5w+1.5w+1.5w+1.5w+1.5w+w+1.5w+ is arranged as along the width in length of side direction
1.5w+1.5w+1.5w+1.5w can conduct 16 × 16 scintillation crystal array with 11 × 11 optical fiber array, reach an a pair
The effect that should be coupled.
It should be noted that in order to realize better imaging effect, each scintillation crystal item is in scintillation crystal array
Six mirror polish, and impermeable stimulative substance should be coated between each scintillation crystal item, such as irreflexive barium sulfate powder or minute surface
Reflectance coating (ESR film) etc.；Diffusing reflection substance, such as barium sulfate powder etc. should be also coated between each light guide item of light guide.Light guide
Height should be less than the height of scintillation crystal array.It is saturating that the blooms such as organic glass, inorganic quartz glass may be selected in the material of light guide
The material for the property crossed.The whole height of light guide is preferably ranges between 0.1mm-13mm.
Fig. 8 is position spectrogram picture according to acquired in the nuclear detector of one embodiment of the utility model, can be with by Fig. 8
Find out, nuclear detector provided by the utility model can obtain the clear figure of the position spectrum of corresponding 13 × 13 scintillation crystal items
The scintillation crystal item of picture, especially edge also can be differentiated clearly.
Light guide and nuclear detector provided by the utility model, improve tapered light guides, employ the light guide of wedge
Array, the length of shortening light guide that can be by a relatively large margin, reduces light loss rate, optical signal signal-to-noise ratio is improved, especially to crystalline substance
The light loss rate reduction at volume array edge is more, can all distinguish the position spectrum of edge crystal, be visited in PET system or radiation
Measurement equipment will not cause data gather disappearance when integrated, will not reduce system sensitivity.Meanwhile light splitting is led in the middle part of the utility model
The width of item is the width more than crystal item, so as to reduce the quantity of light guide item, and the processing yields of light guide crystal
Higher advantageously reduces the cost of nuclear detector.
Above-described, the only preferred embodiment of the utility model is not intended to limit the scope of the utility model, this
Above-described embodiment of utility model can also make a variety of changes.I.e. every claims according to the present utility model application and
Simple, the equivalent changes and modifications that description is made fall within the claims of the utility model patent.This
The not detailed description of utility model is routine techniques content.
Claims (16)
1. a kind of light guide, which is characterized in that the light guide includes：
Several light guide items, the light guide sequential form the light guide, and each light guide item has opposite light guide
The big face of item and light guide facet, the length of side in the big face of light guide item are divided into several different brackets, the side of the light guide facet
Length is divided into several different brackets；
Upper surface, the big face of all light guide items form the upper surface；
Lower surface, the lower surface are parallel to the upper surface, and all light guide facets form the lower surface, described
The quantity in the big face of light guide item is identical with the quantity of the light guide facet, and the area of the lower surface is less than the face of the upper surface
Product；And
Side, the side connect the upper surface and the lower surface.
2. light guide according to claim 1, which is characterized in that the side of the light guide includes first side and the second side
Face, the first side from the following table towards the direction of the upper surface extend, the second side from the upper table towards
The direction extension of the lower surface, the first side and the second side form chamfering, and the chamfering is obtuse angle.
3. light guide according to claim 2, which is characterized in that the distance of upper surface is described in the vertex distance of the chamfering
0.1mm-2mm。
4. light guide according to claim 1, which is characterized in that the upper surface and the lower surface are rectangle, described
The big face of light guide item and the light guide facet are cut into rectangle.
5. light guide according to claim 4, which is characterized in that the big face of light guide item of the different brackets length of side from it is different etc.
The light guide facet of the grade length of side is arranged symmetrically respectively along the length of side in the big face of the light guide item and the light guide facet.
6. light guide according to claim 1, which is characterized in that the upper surface and the lower surface to be round, trapezoidal or
Person's ellipse, irregular shape is cut into along the outermost big face of light guide item of the light guide and the light guide facet
Shape, remaining big face of light guide item and the light guide facet are cut into rectangle.
7. light guide according to claim 1, which is characterized in that coat impermeable stimulative substance between the light guide item.
8. light guide according to claim 1, which is characterized in that the height of the light guide is between 0.1mm-13mm.
9. a kind of nuclear detector with light guide described in claim 1, which is characterized in that the nuclear detector includes：
Scintillation crystal array, the scintillation crystal array include several sequentials and the scintillation crystal item of same specification, institute
Scintillation crystal array is stated with scintillation crystal upper surface and scintillation crystal lower surface；And
The light guide, the light guide include：
Several light guide items, the light guide item is mutually arranged to form the light guide, and each light guide item has opposite light guide
The big face of item and light guide facet, the length of side in the big face of light guide item are divided into several different brackets, the side of the light guide facet
Long to be divided into several different brackets, the length of side in the big face of light guide item is not less than the length of side of the scintillation crystal item；
Upper surface, the big face of all light guide items form the upper surface, the upper surface and the scintillation crystal lower surface
Coupling；
Lower surface, the lower surface are parallel to the upper surface, and the lower surface is coupled with electrooptical device, and all is described
Light guide facet forms the lower surface, and the quantity in the big face of light guide item is identical with the quantity of the light guide facet, described
The area of lower surface is less than the area of the upper surface；And
Side, the side connect the upper surface and the lower surface.
10. nuclear detector according to claim 9, which is characterized in that the side of the light guide includes first side and the
Two side faces, the first side extend from the following table towards the direction of the upper surface, and the second side is from the upper table
Extend towards the direction of the lower surface, the first side and the second side form chamfering, and the chamfering is obtuse angle.
11. light guide according to claim 10, which is characterized in that the distance of upper surface described in the vertex distance of the chamfering
For 0.1mm-2mm.
12. light guide according to claim 9, which is characterized in that the upper surface and the lower surface are rectangle, described
The big face of light guide item and the light guide facet are cut into rectangle.
13. light guide according to claim 12, which is characterized in that the big face of light guide item of the different brackets length of side from it is different
The light guide facet of the grade length of side is arranged symmetrically respectively along the length of side in the big face of the light guide item and the light guide facet.
14. light guide according to claim 9, which is characterized in that the upper surface and the lower surface to be round, trapezoidal or
Person's ellipse, irregular shape is cut into along the outermost big face of light guide item of the light guide and the light guide facet
Shape, remaining big face of light guide item and the light guide facet are cut into rectangle.
15. light guide according to claim 9, which is characterized in that coat impermeable stimulative substance between the light guide item.
16. light guide according to claim 9, which is characterized in that the height of the light guide is between 0.1mm-13mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721486596.6U CN207557495U (en) | 2017-11-09 | 2017-11-09 | A kind of light guide and nuclear detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721486596.6U CN207557495U (en) | 2017-11-09 | 2017-11-09 | A kind of light guide and nuclear detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765603A (en) * | 2017-11-09 | 2019-05-17 | 苏州瑞派宁科技有限公司 | A kind of light guide and nuclear detector |
| CN109856664A (en) * | 2018-12-04 | 2019-06-07 | 山东麦德盈华科技有限公司 | A kind of pet detector that part light guide is not cut |
-
2017
- 2017-11-09 CN CN201721486596.6U patent/CN207557495U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109765603A (en) * | 2017-11-09 | 2019-05-17 | 苏州瑞派宁科技有限公司 | A kind of light guide and nuclear detector |
| CN109856664A (en) * | 2018-12-04 | 2019-06-07 | 山东麦德盈华科技有限公司 | A kind of pet detector that part light guide is not cut |
| CN109856664B (en) * | 2018-12-04 | 2020-12-01 | 山东麦德盈华科技有限公司 | PET detector with partial light guide not cutting |
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