CN206193276U - Prism and glass surface stress detection device - Google Patents
Prism and glass surface stress detection device Download PDFInfo
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- CN206193276U CN206193276U CN201621061885.7U CN201621061885U CN206193276U CN 206193276 U CN206193276 U CN 206193276U CN 201621061885 U CN201621061885 U CN 201621061885U CN 206193276 U CN206193276 U CN 206193276U
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- 238000001514 detection method Methods 0.000 title claims abstract description 98
- 239000011521 glass Substances 0.000 title claims abstract description 54
- 238000009795 derivation Methods 0.000 claims abstract description 15
- 230000000644 propagated effect Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 22
- 238000012216 screening Methods 0.000 claims description 10
- 238000003384 imaging method Methods 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 7
- 239000010453 quartz Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000005286 illumination Methods 0.000 claims description 5
- 230000010287 polarization Effects 0.000 claims description 4
- 239000011358 absorbing material Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 claims 2
- 230000001070 adhesive effect Effects 0.000 claims 2
- 238000010030 laminating Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 6
- 239000004606 Fillers/Extenders Substances 0.000 description 3
- 230000004313 glare Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 239000005336 safety glass Substances 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
- 230000010415 tropism Effects 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The application discloses prism and use this prism as the glass surface stress detection device who detects the prism. The prism includes integrated into one piece's leading -in component prism and derivation component prism, leading -in component prism has coplaner first surface of the work and second surface of the work each other respectively with the derivation component prism, wherein, be provided with on the prism and be located channel into the component prism and derive between the component prism and the perpendicular to the present invention has the advantages of wide applying foreground. At least one recess forms and is used for preventing light to follow a first surface of the work side direction the diaphragm that propagated second surface of the work one side. Because leading -in component prism and derivation component prism integrated into one piece to form the diaphragm through seting up the recess on the prism of an organic whole, so be convenient for guarantee the coplane of surface of the work on the one hand, on the other hand makes the simple compactness of prism structure, the convenient manufacturing.
Description
Technical field
This disclosure relates to a kind of optical detection apparatus, in particular it relates to a kind of glass surface stress detection device and can
To be applied to its prism.
Background technology
Glass plate is all common material in daily life and industrial production.In order to weigh glass sheet quality, ensure glass
The safety that plate is used, it is often necessary to measured to the stress in glass plate.In order to detect glass plate stress, in standards such as GBs
Middle regulation, the surface stress of glass is measured using birefringent mode, to characterize the stress level of inside glass.At present, it is actual
When using, the mode for determining glass surface stress mainly has：Differential surface refraction process DSR (Differential Surface
Refractometry), surface sweep angle polarisation method GASP (Grazing Angle Surface Plarimetry), and in the recent period
The method that Estonia is proposed transmission laser.Wherein GASP modes have higher to surface stress than relatively low safety glass
Certainty of measurement, it is adaptable to the surface stress detection of the architectural semi-tempered glass for using.
The principle of GASP measuring methods is：Incident polarization light beam enters glass surface thin layer, parallel glass surface operation one
Glass is left after segment distance, due to glass surface stress, light beam produces birefringent phenomenon, and its optical path difference can be by quartz wedge
Accurately measure.It is generally used for light be directed to the importing prism of glass surface in GASP measuring methods and by light from glass table
Face is derived to derive prism.Prism is imported in the prior art and is derived that prism is formed separately and is needed to set between the two
In terms of diaphragm, this parallel co-planar between the respective surfaces fitted with glass surface for ensureing to import prism and derive prism still
There is deficiency.
Utility model content
In view of above shortcomings in the prior art, it is easy that the utility model provides a kind of simple structure, operation
Portable glass surface stress detection means.
According to one side of the present utility model, there is provided a kind of glass surface stress detection device, it includes：Illumination is single
Unit, for providing polarization illumination light, the lighting unit includes light source；Detection prism, including import prism and derive prism, it is described
Import prism and derive prism have respectively be used to be fitted with the surface of detected glass with detected coplanar with each other the
One detection surface and the second detection surface；And imaging unit, quartz wedge that it includes being set gradually along light path, analyser plate and thoroughly
Microscope group, the imaging unit is arranged to receive the light from the detection prism and form detection image, wherein, the detection prism
Importing prism and derive prism be integrally formed, and it is described detection prism on be provided with positioned at it is described importing prism and derive prism
Between and perpendicular to the described first detection surface and at least one groove on the second detection surface, at least one groove formed
For the diaphragm for preventing light from being propagated from the lateral second detection surface side in the described first detection surface one.
In certain embodiments, the groove can be by frosted, blacking, at least one mode inserted in light screening material
It is formed diaphragm.It is preferred that, the light screening material is light absorbing material.
Or, can be by insertion and gluing shading sheet material in the groove, so as to form the diaphragm.
It is preferred that, processed or be painted by frosted on the surface relative with the described second detection surface of the derivation prism.
In certain embodiments, at least one groove can include being arranged on the first detection surface and the second inspection
At least one first grooves surveyed between surface and it is arranged on and detects the relative table in surface with the described first detection surface and second
At least one second grooves on face.
It is preferred that, first groove and second groove are on the direction perpendicular to the described first and second detection surfaces
It is mutually overlapping.
It is preferred that, described at least one second grooves include being located at one two second of the both sides of first groove respectively
Groove.It is further preferred that the outer surface between described two second grooves is processed or is painted by frosted.
In certain embodiments, the importing prism of the detection prism includes reflecting simultaneously the light for entering detection prism
It is channeled to the reflecting surface on the first detection surface.
According to other side of the present utility model, there is provided a kind of prism, including it is integrally formed importing component prism and
Derive component prism, the importing component prism and derive component prism there is the first working surface coplanar with each other and the respectively
Two working surfaces, wherein, it is provided with the prism between the importing component prism and derivation component prism and vertical
In first working surface and at least one groove of the second working surface, at least one groove is formed for preventing light
From the diaphragm that the lateral second working surface side of first working surface one is propagated.
In certain embodiments, the groove by frosted, blacking, insert at least one mode in light screening material by shape
As diaphragm.It is preferred that, the light screening material is light absorbing material.
Or, can be by insertion and gluing shading sheet material in the groove, so as to form the diaphragm.
It is preferred that, processed or be painted by frosted on the surface relative with the described second detection surface on the 3rd surface.
In certain embodiments, the prism also has threeth surface relative with first and second working surface,
At least one groove includes that be arranged between the first detection surface and the second detection surface at least one first is recessed
Groove and at least one second grooves being arranged on the 3rd surface.
It is preferred that, first groove and second groove are on the direction perpendicular to the described first and second detection surfaces
It is mutually overlapping.
It is preferred that, described at least one second grooves include being located at one two second of the both sides of first groove respectively
Groove.It is further preferred that the part on the 3rd surface between described two second grooves is processed or is painted by frosted.
In certain embodiments, the importing component prism of the prism also includes that the light that component prism is imported to entering is carried out
Reflect and be channeled to the reflecting surface on the first detection surface.
According to the utility model, import prism and derivation prism is integrally formed, and by opening up prism of the groove in one
Upper formation diaphragm, this aspect is easy to ensure the coplanar of detection surface (working surface), on the other hand so that prism structure is simple
It is compact, convenient manufacture.
Brief description of the drawings
The detailed description to non-limiting example made by referring to the following drawings, other spies of the present utility model
Levy, objects and advantages will become more apparent upon, identical reference represents identical or corresponding part and feature in accompanying drawing.
Fig. 1 is the structural representation of the glass surface stress detection device according to the utility model embodiment；
Fig. 2A shows that of the prism of the detection prism that can be used as in glass surface stress detection device shown in Fig. 1 shows
Example；
Fig. 2 B show another of the prism of the detection prism that can be used as in glass surface stress detection device shown in Fig. 1
Example.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining relevant utility model, rather than the restriction to the utility model.Further need exist for explanation
, for the ease of description, the part related to utility model is illustrate only in accompanying drawing.
Fig. 1 is the structural representation of the glass surface stress detection device 100 according to the utility model embodiment.Such as Fig. 1
Shown, glass surface stress detection device 100 includes：Lighting unit 10, detection prism 20 and imaging unit 30.
Lighting unit 10 is used to provide polarization illumination light, and the lighting unit includes light source.In the example illustrated in figure 1, illuminate
The light source of unit 10 includes laser 12 and collimator and extender mirror 13.Laser monochromaticjty that laser 12 sends is good, coherence is good, side
Tropism is good, brightness is high.Collimator and extender mirror 13 is used to expand the diameter of the light beam from laser 12.The utility model is not limited to
This structure of light source.In glass surface stress detection device 100, light source can also take other suitable forms.For example,
Light source can include monochromatic LED, and be not limited to use collimator and extender mirror.
Detection prism 20 includes importing prism 21 and derives prism 22 and the diaphragm being arranged between.Import prism
21 and derive prism 22 and have respectively for coplanar with each other first examining to be detected of fit with the surface of detected glass G
Survey the detections of surface 21a and second surface 22a.Importing prism 21 guides the illumination from lighting unit 10 to be mapped to the first detection surface
21a and the joint place on the surface of detected glass G, derive prism 22 from the second detection surface 22a with detected glass surface G's
The light propagated with critical angle incidence and along glass surface is derived in joint place coupling.
Detect that the importing prism 21 of prism 20 can also include the light for entering detection prism 20 is reflected and drawn
Lead the reflecting surface 21b to the first detection surface 21a.
As shown in figure 1, imaging unit 30 includes the quartz wedge 32, analyser plate 33 and the lens 34 that are set gradually along light path.
The imaging unit 30 is arranged to receive the light of Autonomous test prism 20 and forms detection image.Imaging unit 30 can also include anti-
Mirror 31 is penetrated, the light for Autonomous test prism in future 20 reflexes to quartz wedge 32.
Operationally, the convergent beam from lighting unit 10 enters detection prism to glass surface stress detection device 100
20, and be irradiated on the first detection surface 21a, wherein at least part of light with the cirtical angle of total reflection enters is detected glass table
Face, is derived after propagating a segment distance along glass surface by the second detection surface 22a couplings.Due to glass surface stress, light
Beam produces birefringent phenomenon, therefore, the optical path difference contained in light derived from the 22a of surface on a direction is detected from second.Institute
Derived light is stated by quartz wedge 32, then is launched after analyser plate 33 to lens group 34.Can make light using quartz wedge 32
The optical path difference on another different directions is produced, it is superimposed with the optical path difference caused due to birefringence, produces light interference
Inclined interference fringe.Glass surface stress value is directly proportional to the inclination angle tan of interference fringe.Determine interference fringe
Inclination angle, it is possible to calculate glass surface stress value.
What the structure of the glass surface stress detection device 100 above by reference to shown in Fig. 1 was merely exemplary, detection means
100 can also include other parts not described herein or for substituting the part, with similar functions of above-mentioned introduction
Part.
It is different from the importing prism and derivation prism in the prior art using split, according to the glass of the utility model embodiment
In glass surface stress detection means 100, detecting the importing prism (importing component prism) 21 of prism 20 and deriving prism (derives rib
Mirror part) 22 be integrally formed, and be provided with detection prism 20 positioned at import prism 21 and derive between prism 22 and perpendicular to
At least one groove 23 of the first detection surface (the first working surface) 20a and second detection surface (the second working surface) 20b.
At least one groove 23 forms diaphragm, for preventing light from being passed from the first detection surface one lateral second detection surface side
Broadcast.
Groove 23 for example can by frosted, blacking, insert at least one mode in light screening material and form diaphragm.Or
Person, it is also possible to insert in groove 23 and be bonded shading sheet material such as sheet metal to form diaphragm.
According to the utility model, detect that the importing prism 21 and derivation prism 22 of prism 20 are integrally formed so that the first inspection
The detections of surface 21a and second surface 22a is surveyed at grade, to improve machining accuracy.Compared to glass of the prior art
Surface stress detection means, the glass surface stress detection device according to the utility model embodiment can reduce due to importing rib
The error that the optical contact surface of mirror 21 and derivation prism 22 is misaligned and causes.Correspondingly, also cause that the structure of device is simpler
It is single compact.
The topology example of the prism that can be used as above-mentioned detection prism 20 is introduced below in conjunction with Fig. 2A, Fig. 2 B.
Fig. 2A shows an example of the prism that can be used as detecting prism 20, i.e. prism 20A.As illustrated, prism 20A
Including integrally formed importing component prism 21 and derivation component prism 22, they have the first worksheet coplanar with each other respectively
Face 21a and the second working surface 22a.
As shown in Figure 2 A, it is provided with prism 20A between component prism 21 and derivation component prism 22 and vertical positioned at importing
Directly in two grooves 23a, 23b of the first working surface 21a and the second working surface 22a.Groove 23a is formed in the first worksheet
Between face 21a and the second working surface 22a.In fig. 2 in shown orientation, groove 23a extends from bottom to top.Groove 23b is formed
On threeth surface 24 relative with first and second working surface 21a, 22a of prism 20A.In fig. 2 in shown orientation,
Groove 23b extends from the top down.
In order to preferably shut out the light, it is preferable that groove 23a and groove 23b are perpendicular to the first and second working surfaces
Mutually overlapped on the direction of 21a, 22a, it is illustrated that region O is overlapping part.
Although showing that groove 23b is located at the left side (importing component prism side) of groove 23a in Fig. 2A, it also may be used
So that positioned at the right side of groove 23a (deriving component prism side), the utility model is not limited in this respect.
Groove 23a, 23b for example can by frosted, blacking, insert at least one mode in light screening material and form light
Door screen.Or, it is also possible to shading sheet material such as sheet metal is inserted in groove 23a, 23b and is bonded to form diaphragm.
Preferably, frosted treatment is carried out on the part surface 24a relative with the second working surface 22a on the 3rd surface 24
Or blacking (for example spraying pitch-dark).So can preferably eliminate the influence of veiling glare.
Fig. 2 B show another example for the prism that can be used as detecting prism 20, i.e. prism 20B.The structure of prism 20B
Similar to prism 20A, difference is essentially consisted in, and two groove 23b are formed with the 3rd surface 24 of prism 20B, and this two
Individual groove 23b is respectively positioned at the both sides of groove 23a.
It is preferred that, as illustrated, two groove 23b all with groove 23a perpendicular to first and second working surface 21a, 22a
Direction on mutually overlap, it is illustrated that region O ' is overlapping part.However, it is to be appreciated that can only have one in two groove 23b
Individual groove 23b and groove 23a is overlapped in the vertical direction.
Similar to prism 20A, groove 23a, 23b of prism 20B for example can also by frosted, blacking, insert lightproof material
At least one mode in material forms diaphragm.Or, it is also possible to inserted in groove 23a, 23b and be bonded shading sheet material for example
Sheet metal forms diaphragm.
Preferably, frosted treatment is carried out on the part surface 24a relative with the second working surface 22a on the 3rd surface 24
Or blacking (for example spraying pitch-dark).So can preferably eliminate the influence of veiling glare.
Preferably, the part surface 24b between two groove 23b on the 3rd surface 24 can carry out frosted treatment
Or blacking (for example spraying pitch-dark).So can preferably eliminate the influence of veiling glare.
Although showing to form a two groove 23b and groove 23a in Fig. 2 B, the utility model is not limited to
This.In other examples, prism can be formed as example being opened with a groove 23b being opened on the 3rd surface and two
It is located at the groove 23a between first and second working surface 21a, 22a.
Although it should be understood that in figure 2 above A and Fig. 2 B example showns, groove 23 is opened in working surface and therewith
On the 3rd relative surface, but the utility model is not limited to this.Groove 23 can also include being opened in being connected to worksheet
On side surface between face and the 3rd surface.For example, groove 23 can include being opened between the first and second working surfaces
Groove 23a and open up groove 23b on the side surface.
Although further, it is understood that above by reference to Fig. 2A and Fig. 2 B describe example in, in prism formed two or
Three grooves, but the utility model is not limited to this.Stop light for example, be disclosure satisfy that in the diaphragm that a groove is formed
It is required that in the case of, prism 20 can be only formed with a groove.On the other hand, prism 20 can also include recessed more than 3
Groove, as long as the structure that manufacturing process is allowed and obtained can be applied to the application scenario of target.
Above description is only the preferred embodiment and the explanation to institute's application technology principle of the application.People in the art
Member is it should be appreciated that involved utility model scope in the application, however it is not limited to the particular combination of above-mentioned technical characteristic
Technical scheme, while should also cover in the case where the inventive concept is not departed from, by above-mentioned technical characteristic or its equivalent feature
Other technical schemes for being combined and being formed.Such as features described above has class with (but not limited to) disclosed herein
Like the technical scheme that the technical characteristic of function is replaced mutually and formed.
Claims (20)
1. a kind of glass surface stress detection device, including：
Lighting unit, for providing polarization illumination light, the lighting unit includes light source；
Detection prism, including import prism and derive prism, the importing prism and derivation prism have respectively to be used for and is detected
The the first detection surface coplanar with each other and the second detection surface that the surface laminating of glass is surveyed to be detected；With
Imaging unit, it includes the quartz wedge, analyser plate and the lens group that are set gradually along light path, and the imaging unit is arranged to connect
Receive the light from the detection prism and form detection image,
Characterized in that, the importing prism and derivation prism of the detection prism are integrally formed, and set on the detection prism
Have between the importing prism and derivation prism and perpendicular to the described first detection surface and the second detection surface at least
One groove, at least one groove is formed for preventing light from the described first lateral second detection table in detection surface one
The diaphragm that face side is propagated.
2. glass surface stress detection device as claimed in claim 1, it is characterised in that the groove by frosted, blacking,
At least one mode inserted in light screening material is formed diaphragm.
3. glass surface stress detection device as claimed in claim 2, it is characterised in that the light screening material is light absorbs material
Material.
4. glass surface stress detection device as claimed in claim 1, it is characterised in that insert and be adhesive with the groove
Shading sheet material, so as to form the diaphragm.
5. glass surface stress detection device as claimed in claim 1, it is characterised in that at least one groove includes setting
Put at least one first grooves between the described first detection surface and the second detection surface and be arranged on and the described first inspection
At least one second grooves surveyed on the relative surface in surface and the second detection surface.
6. glass surface stress detection device as claimed in claim 5, it is characterised in that the derivation prism with it is described
The relative surface in second detection surface is processed or is painted by frosted.
7. glass surface stress detection device as claimed in claim 5, it is characterised in that first groove and described second
Groove is mutually overlapped on the direction perpendicular to the described first and second detection surfaces.
8. glass surface stress detection device as claimed in claim 5, it is characterised in that described at least one second groove bags
Include and be located at respectively two second grooves of the both sides of first groove.
9. glass surface stress detection device as claimed in claim 8, it is characterised in that between described two second grooves
Outer surface is processed or is painted by frosted.
10. glass surface stress detection device as claimed in any one of claims 1-9 wherein, wherein, the detection prism is led
Entering prism includes reflecting the light for entering detection prism and being channeled to the reflecting surface on the first detection surface.
A kind of 11. prisms, including integrally formed importing component prism and component prism is derived, the importing component prism and lead
Go out component prism has the first working surface and the second working surface coplanar with each other respectively,
Characterized in that, be provided with the prism positioned at it is described importing component prism and derive component prism between and perpendicular to
At least one groove of first working surface and the second working surface, at least one groove formed for prevent light from
The diaphragm that the lateral second working surface side of first working surface one is propagated.
12. prisms as claimed in claim 11, it is characterised in that during the groove is by frosted, blacking, inserting light screening material
At least one mode be formed diaphragm.
13. prisms as claimed in claim 12, it is characterised in that the light screening material is light absorbing material.
14. prisms as claimed in claim 11, it is characterised in that shading sheet material is inserted and be adhesive with the groove, so that
Form the diaphragm.
15. prisms as claimed in claim 11, it is characterised in that the prism also has and first and second worksheet
The 3rd relative surface of face, at least one groove includes being arranged between the first detection surface and the second detection surface
At least one first grooves and at least one second grooves that are arranged on the 3rd surface.
16. prisms as claimed in claim 15, it is characterised in that in the 3rd surface and the described second detection surface phase
To surface by frosted process or be painted.
17. prisms as claimed in claim 15, it is characterised in that first groove and second groove are perpendicular to institute
State and mutually overlapped on the direction on the first and second detection surfaces.
18. prisms as claimed in claim 15, it is characterised in that described at least one second grooves include being located at one respectively
Two the second grooves of the both sides of first groove.
19. prisms as claimed in claim 18, it is characterised in that the part on the 3rd surface between described two second grooves
Processed or be painted by frosted.
20. prism as any one of claim 11-19, wherein, the importing component prism of the prism is also including right
The reflecting surface on the first detection surface is reflected and is channeled into the light for importing component prism.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621061885.7U CN206193276U (en) | 2016-09-18 | 2016-09-18 | Prism and glass surface stress detection device |
| PCT/CN2017/102099 WO2018050113A1 (en) | 2016-09-18 | 2017-09-18 | Prism and glass surface stress detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621061885.7U CN206193276U (en) | 2016-09-18 | 2016-09-18 | Prism and glass surface stress detection device |
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| Publication Number | Publication Date |
|---|---|
| CN206193276U true CN206193276U (en) | 2017-05-24 |
Family
ID=58728637
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621061885.7U Active CN206193276U (en) | 2016-09-18 | 2016-09-18 | Prism and glass surface stress detection device |
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| Country | Link |
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| CN (1) | CN206193276U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324730A (en) * | 2016-09-18 | 2017-01-11 | 北京杰福科技有限公司 | Prism and glass surface stress test device |
| WO2018050113A1 (en) * | 2016-09-18 | 2018-03-22 | 北京杰福科技有限公司 | Prism and glass surface stress detection device |
-
2016
- 2016-09-18 CN CN201621061885.7U patent/CN206193276U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324730A (en) * | 2016-09-18 | 2017-01-11 | 北京杰福科技有限公司 | Prism and glass surface stress test device |
| WO2018050113A1 (en) * | 2016-09-18 | 2018-03-22 | 北京杰福科技有限公司 | Prism and glass surface stress detection device |
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Effective date of registration: 20240308 Address after: Room 520, 5th Floor, Building 3, Courtyard 69, Fushi Road, Haidian District, Beijing, 100143 Patentee after: BEIJING JEFFOPTICS Co.,Ltd. Country or region after: China Address before: Room 225, Building 1, Jimenli Community, Haidian District, Beijing 100191 Patentee before: BEIJING JEFFOPTICS Co.,Ltd. Country or region before: China Patentee before: NANTONG JIEFU OPTICAL INSTRUMENT TECHNOLOGY Co.,Ltd. |