CN112731574B - Prism and laser scanning unit - Google Patents
Prism and laser scanning unit Download PDFInfo
- Publication number
- CN112731574B CN112731574B CN202011632576.1A CN202011632576A CN112731574B CN 112731574 B CN112731574 B CN 112731574B CN 202011632576 A CN202011632576 A CN 202011632576A CN 112731574 B CN112731574 B CN 112731574B
- Authority
- CN
- China
- Prior art keywords
- prism
- incident
- reflecting
- emergent
- scanning
- 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.)
- Active
Links
- 230000014509 gene expression Effects 0.000 claims description 16
- 238000007493 shaping process Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
- G02B26/12—Scanning systems using multifaceted mirrors
- G02B26/125—Details of the optical system between the polygonal mirror and the image plane
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/0409—Details of projection optics
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Facsimile Scanning Arrangements (AREA)
- Mechanical Optical Scanning Systems (AREA)
Abstract
The invention discloses a prism and a laser scanning unit, wherein the prism comprises an incident surface, a reflecting surface and an emergent surface, the incident surface and the emergent surface are free curved surfaces with different surface types, the incident surface and the emergent surface are respectively used for realizing equal-interval scanning and collinear scanning, and the reflecting surface is used for reflecting light rays of the incident surface to the emergent surface. According to the invention, through the design of the curved surface prism, a plane of the prism is set as a reflecting surface, so that the layout design of a light path and elements is optimized, and the overall size is reduced. The free-form surface shape of the lens is designed, so that the integral structure is convenient to optimize, the light beams can be guaranteed to be converged on the same straight line while the light beams are scanned at equal intervals, and the image-text scanning and printing are realized.
Description
Technical Field
The invention relates to the field of laser scanning devices, in particular to a prism and a laser scanning unit.
Background
After the living environment enters the science and technology era, many science and technology products are continuously researched and developed and produced, great convenience is brought to life and work, in daily office equipment, a printer used at present mainly applies a laser scanning unit to print pictures and texts, and the laser scanning unit on the market comprises a laser generator, a collimating lens group, a polygonal mirror motor, an FTL lens and an illuminated surface. The laser beam emitted by the laser generator is a divergent beam, and the divergent beam passes through the collimating lens group and is focused on the mirror surface of the polygonal mirror motor for one time; the laser reflected by the polygon mirror motor can be diverged, and passes through the FTL lens to be focused for the second time on the surface of the light receiving surface to form a light spot.
However, along with the development of science and technology, the laser printer requires more and more miniaturization, and the whole size of the existing laser scanning unit is larger, which is not beneficial to the miniaturization of printing equipment and the layout of internal elements of the whole printer.
Disclosure of Invention
The invention aims to solve the problems and provide the following technical scheme,
the prism comprises an incident surface, a reflecting surface and an emergent surface, wherein the incident surface and the emergent surface are free curved surfaces with different surface types, the incident surface and the emergent surface are respectively used for realizing equidistant scanning and collinear scanning, and the reflecting surface is used for reflecting light rays of the incident surface to the emergent surface.
As one embodiment thereof, the incident surface and the exit surface satisfy the following expression:
wherein C is y Curvature in the y-direction;
C x (Y) is the curvature in the x-direction;
K y conic coefficient in y direction;
x and Y represent the distance between X and Y;
z (x, y) represents the coordinate in the Z direction;
A n ,B n ,......F n the coefficients are different in expression of the incident surface and the emergent surface so as to realize equal-interval scanning and collinear scanning.
As one example, C y The expression of (a) is:
C x the expression (Y) is:
R x is the radius in the x direction;
R Y is the radius in the y direction;
a n ,b n ,c n ......j n are all coefficients.
As one example, the reflecting surface is formed by providing a coating on the prism facets.
As one embodiment, the included angle between the incident ray of the incident surface and the emergent ray of the emergent surface is 60-120 degrees.
As one example, the incident light and the emergent light are perpendicular.
As one embodiment, positioning blocks are arranged at two ends of the prism.
A laser scanning unit, comprising:
a laser generator;
a lens component for collimating and shaping the light beam;
a rotary polygon mirror device for reflecting the laser light;
the prism is described.
As one example, the lens member is a lenticular-integrated lens.
As one embodiment, the incident surface of the integrated lens is a cylindrical surface, and the emergent surface of the integrated lens is a spherical surface.
The technical scheme of the invention has the following beneficial effects:
(1) according to the invention, through the design of the curved surface prism, one prism surface of the prism is set as a plane type reflecting surface, so that the layout design of a light path and elements is optimized, and the overall size is reduced. The free-form surface shape of the lens is designed, so that the integral structure is convenient to optimize, the light beams can be guaranteed to be converged on the same straight line while the light beams are scanned at equal intervals, and the image-text can be scanned and printed.
(2) The laser scanning unit provided by the invention has a simple structure and a reasonable design, can effectively reduce the volume of the existing laser scanning unit, is convenient for optimizing the overall layout of a printer, and reduces structural materials, saves cost and is beneficial to the design of miniaturization and light weight of the whole machine while ensuring the optical characteristics by optimizing the lens group into an integral lens.
Drawings
FIG. 1 is an overall block diagram of the present invention;
FIG. 2 is a side view structural diagram of the prism of the present invention;
FIG. 3 is an isometric view of a prism according to the present invention;
FIG. 4 is a schematic diagram of the optical path of the prism of the present invention;
FIG. 5 is a block diagram of a lens component of the present invention;
FIG. 6 is a schematic cross-sectional view of the structure shown in FIG. 5;
FIG. 7 is a block diagram of the integral lens of the present invention;
fig. 8 is a structural view of a rotary polygon mirror apparatus of the present invention;
fig. 9 is a structural view of the base of the present invention.
In the figure, 1, a base; 2. a prism; 3. a lens member; 4. a rotating polygonal mirror device; 5. a detection device; 12. a circuit board; 13. a clamping assembly; 14. fixing a support plate; 21. an exit surface; 22. a reflective surface; 23. an incident surface; 24. a fixed block; 31. fixing a bracket; 32. a lens holder; 33. a compression ring; 34. a diaphragm; 35. an integral lens; 41. a rotating polygonal mirror; 42. a motor; 43. a circuit board A; 51. a sensor; 52. a synchronous prism; 53. synchronous prism mount pad.
Detailed Description
For better understanding of the present invention, the present invention is further described below with reference to specific embodiments and accompanying drawings, and as shown in fig. 1 to 4, the present invention discloses a prism 2, which is used for a laser scanning module, and has a prism structure with two prism faces being free curved surfaces and one prism face being a plane, three prism faces respectively forming an incident face 23, a reflecting face 22 and an exit face 21, the incident face and the exit face being free curved surfaces of different face types, the incident face and the exit face being respectively used for realizing equal-interval scanning and collinear scanning, the reflecting face 22 being used for reflecting light passing through the incident face 23 to the incident side of the exit face 21, the reflecting face being formed by disposing a reflecting coating on one plane of the prism, and the reflecting coating being made of an existing coating material.
The light beam is reflected on the incident surface 23 via the rotary polygon mirror device 4, transmitted to the reflecting surface 22 via the incident surface 23, reflected on the exit surface 21 by the reflecting surface 22 and emitted to a target device such as a photosensitive drum. The equidistant scanning means that in the laser scanning module, when the polygon mirror rotates around the rotation center by the same angle, the laser beams scan by the same distance, and the collinear scanning means that the light beams passing through the emergent surface are positioned on the same straight line.
Wherein, the contained angle of the incident ray of incident surface and the emergent ray of emergent surface can set up according to the design demand difference, and the adaptation casing inner space design that can be better through the reflection is favorable to the miniaturization of equipment. The angle between the incident ray of the incident surface and the emergent ray of the emergent surface is preferably 60-120 degrees, for example, the incident ray and the emergent ray are vertically arranged, and can be matched with the corresponding surface type to realize the same function.
According to the invention, through the design of the curved surface prism type of the prism, the light path and the element layout design are optimized by utilizing the reflecting surface, and the overall size is reduced. The free-form surface shape of the lens is designed, so that the integral structure is convenient to optimize, the light beams can be guaranteed to be converged on the same straight line while the light beams are scanned at equal intervals, and the image-text can be scanned and printed.
Specifically, as one of the embodiments, the incident surface and the exit surface of the lens satisfy the following expressions, respectively:
wherein C is y Curvature in the y-direction; the expression is as follows:
C x curvature in the x-direction; the expression is as follows:
R X is the radius in the x direction;
R Y is the radius in the y direction;
K y conic coefficient in y direction;
a n ,b n ,c n ......j n ,A n ,B n ,......F n are coefficients, the coefficients of the expressions for the entrance face and the exit face being different.
R x And R y Is a radius representing the x, y direction. The directions of x, y and z satisfy the right-hand rule; n is a corner mark, X and Y represent the distance between the X and Y directions, Z (X, Y) represents the coordinate of the Z direction and is determined by X and Y, C x (Y) represents curvature in the x-direction, and is a mixed expression relating to Y.
Wherein the incident surface is used to realize the equidistant scanning of the light beam and the incident surface satisfies the above expression, in general, the material may be selected from optical resin, optical glass, etc., the optical resin having good processability, wherein, as a specific example, the coefficients are shown in table 1 below:
TABLE 1
Wherein, the exit surface is used for converging the light beam on the same straight line so as to realize the scanning to each row, as a specific embodiment, the coefficient is as shown in table 2 below:
TABLE 2
The invention designs the free-form surface shape of the prism, the prism surfaces with different functions adopt different surface types, if different expressions are adopted, or the same expression is adopted but the coefficients are different, and the prism realizes a plurality of functions and is convenient to optimize the whole structure. When realizing the equidistant scanning of light beam, can guarantee to assemble the light beam to same straight line, promote system stability.
As a specific application structure of the prism 2, the prism 2 disclosed in the present invention further includes positioning blocks 24 disposed at two ends, wherein the positioning blocks 24 are configured at two ends of the prism, that is, at two ends of the incident surface 23, the reflecting surface 22 and the emitting surface 21, and are preferably integrally formed, and the positioning blocks 24 are used for fixing and assembling the prism 2. The integral design positioning accuracy is high, and the part is removable, can also reduce laser scanning unit structure simultaneously, satisfies small-size design, strengthens holistic practicality.
As shown in fig. 1 to 9, the present invention also discloses a laser scanning unit, comprising: the laser generator is a laser diode and is used for emitting laser beams; the base 1, the base 1 mainly has effects of supporting and fixing and forming the inside and outside structure; a lens part 3 for collimating and shaping the light beam; a rotary polygonal mirror device 4 for reflecting the laser beam, wherein the rotary polygonal mirror device 4 reflects the light beam and reflects the light beam onto the prism 2; and the detection device 5 is used for counting the number of lines in scanning and sending a signal to a main control processor of the laser generator after the scanning is finished so as to perform next line scanning again.
The base is internally provided with a circuit board 12, a clamping component 13 and a fixed support plate 14, wherein the circuit board 12 is clamped or fixed on the base 1, the clamping component 13 is matched with the fixed blocks at the two ends of the prism 2 to realize clamping and positioning, and the fixed support plate 14 is arranged at the two sides of the outer part of the base 1 and is used for connecting or fixing the whole laser scanning unit with other devices.
As shown in fig. 8, the rotary polygonal mirror device 4 includes a rotary polygonal mirror 41, a motor 42, and a circuit board a43 for controlling the motor to rotate at a constant speed, the circuit board a43 is fixed or clamped inside the base 1, and the rotary polygonal mirror 41 reflects the light beam so that the light beam is projected onto the prism 2.
The detection device comprises a synchronous prism 52, a sensor 51 and a synchronous prism mounting seat 53, the base 1 is provided with the synchronous prism mounting seat 53, the synchronous prism 52 is positioned beside the prism 2 and fixed on the synchronous prism mounting seat 53, light reflected by the rotary polygonal mirror 41 scans from right to left on the prism 2, when the leftmost end is scanned, light can be emitted to the sensor 51 through the synchronous prism 52, the sensor 51 can detect light beams at the moment, then a line synchronization signal is sent to a main control processor of the laser generator, and the next line is scanned from right to left again.
As shown in fig. 5-7, the lens component 3 serves to collimate and shape the light generated by the laser generator, both to reduce the phenomenon of diffuse reflection of light during propagation and to optimize overall volume and performance. The lens adopted by the lens component 3 is an integrated lens 35, the integrated lens 35 is columnar, the incident surface of the integrated lens is a cylindrical surface, the emergent surface of the integrated lens is a spherical surface, when a laser beam passes through the cylindrical surface mirror, parallel light is formed, and the parallel light is changed into linear light after passing through the shaping lens and finally converged on the rotary polygonal mirror. Wherein the curvature K of the emergent surface is in the range of-20 m -1 ≤K≤0m -1 The optimum value of curvature K is-8.835 m -1 The optimization of two or more lens groups is realized through the design of the integrated lens, and the structural materials are reduced under the condition of ensuring the shaping and collimation of light rays, so that the structural cost and the volume occupation are reduced.
The integrated lens 35 can be positioned in a form of direct fixing and clamping, or a lens supporting device can be adopted, as shown in fig. 5 and 6, the lens supporting device comprises a fixing support 31, a lens support 32, a pressing ring 33 and a diaphragm 34, the lens support 32 is fixed on the fixing support 31, the integrated lens 35 is assembled inside the lens support 32, the pressing ring 33 is in contact with the integrated lens 35 to realize pressing and fixing, and the diaphragm 34 limits the diameter of a light beam, so that the imaging range is controlled, and the light beam can be shaped and collimated by matching with the integrated lens 35.
The working principle is as follows: the circuit board 12 controls the laser generator to emit laser, the laser is emitted to the integrated lens 35 through the circular through hole of the fixing support 31, the integrated lens 35 collimates and shapes the laser beam, the laser beam is converted into a collimated beam, the collimated beam is emitted to the rotary polygonal mirror 41 through the diaphragm 34, the rotary polygonal mirror 41 is driven by the motor 42 to rotate at a constant speed, the beam is reflected to the incident surface 23 of the prism 2, equidistant scanning of the beam is achieved, the beam is reflected to the emergent surface 21 through the reflecting surface 22, the emergent surface 21 converges the beam to the same straight line to achieve same straight line scanning, and the beam is scanned from right to left. When the laser scanning is finished for one line, when the light beam reaches the leftmost end of the prism 2, the light beam can be emitted to the synchronous prism 52, and then emitted to the sensor 51 through the synchronous prism 52 for counting, at this time, the sensor 51 can detect the light beam, then sends a signal to the main control processor of the laser generator, and then the next line of scanning from right to left is performed again. The device is characterized in that the light of a laser generator passes through an integrated lens in a collimation shaping device, a constant-speed rotating reflector in a rotating device and a free-form surface prism by controlling the light emitting frequency of the laser generator, is finally scanned and emitted to a photosensitive drum or other components, and forms a shape with a set light spot as a unit.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (8)
1. A prism is characterized by comprising an incident surface, a reflecting surface and an emergent surface, wherein the incident surface and the emergent surface are free curved surfaces with different surface types, the incident surface and the emergent surface are respectively used for realizing equidistant scanning and collinear scanning, and the reflecting surface is used for reflecting light rays of the incident surface to the emergent surface;
the incident surface and the exit surface satisfy the following expressions, respectively:
wherein C is y Curvature in the y-direction;
C x (Y) is the curvature in the x-direction;
K y conic coefficient in y direction;
x and Y represent the distance between X and Y;
z (x, y) represents the coordinate in the Z direction;
A n ,B n ,……F n the coefficients are different, and the expression coefficients of the incident surface and the emergent surface are different so as to respectively realize equal-interval scanning and collinear scanning;
C y the expression of (c) is:
C x the expression (Y) is:
R x is the radius in the x direction;
R Y is the radius in the y direction;
a n ,b n ,c n ……j n are all coefficients.
2. A prism as claimed in claim 1, wherein the reflecting surface is formed by a coating applied to the prism facets.
3. The prism of claim 1, wherein the angle between the incident ray on the entrance face and the exiting ray on the exit face is between 60 ° and 120 °.
4. A prism as claimed in claim 2, wherein the incident and outgoing light rays are perpendicular.
5. The prism as claimed in claim 1, wherein the prism is provided with positioning blocks at both ends thereof.
6. A laser scanning unit, comprising:
a laser generator;
a lens component for collimating and shaping the light beam;
a rotary polygon mirror device for reflecting the laser light;
a prism as claimed in any one of claims 1 to 5.
7. The laser scanning unit of claim 6, wherein the lens component is a cylindrical integral lens.
8. The laser scanning unit of claim 7, wherein the entrance surface of the integral lens is a cylindrical surface, and the exit surface of the integral lens is a spherical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011632576.1A CN112731574B (en) | 2020-12-31 | 2020-12-31 | Prism and laser scanning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011632576.1A CN112731574B (en) | 2020-12-31 | 2020-12-31 | Prism and laser scanning unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112731574A CN112731574A (en) | 2021-04-30 |
| CN112731574B true CN112731574B (en) | 2022-08-05 |
Family
ID=75608428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011632576.1A Active CN112731574B (en) | 2020-12-31 | 2020-12-31 | Prism and laser scanning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112731574B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789055A (en) * | 2011-05-20 | 2012-11-21 | 日立视听媒体股份有限公司 | Scanning type projector |
| CN102801985A (en) * | 2011-05-27 | 2012-11-28 | 日立视听媒体股份有限公司 | Optical beam scanning device and image display device using the same |
| CN103389577A (en) * | 2013-07-23 | 2013-11-13 | 中国科学院长春光学精密机械与物理研究所 | Compact type infrared optical system provided with free-form surface prism and large scanning field view |
| CN110133843A (en) * | 2019-04-30 | 2019-08-16 | 联想图像（天津）科技有限公司 | A kind of laser scan unit and laser printer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003287695A (en) * | 2002-03-27 | 2003-10-10 | Minolta Co Ltd | Laser scanner |
| CN110174762A (en) * | 2019-04-30 | 2019-08-27 | 联想图像（天津）科技有限公司 | A kind of laser scan unit and laser printer |
-
2020
- 2020-12-31 CN CN202011632576.1A patent/CN112731574B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789055A (en) * | 2011-05-20 | 2012-11-21 | 日立视听媒体股份有限公司 | Scanning type projector |
| CN102801985A (en) * | 2011-05-27 | 2012-11-28 | 日立视听媒体股份有限公司 | Optical beam scanning device and image display device using the same |
| CN103389577A (en) * | 2013-07-23 | 2013-11-13 | 中国科学院长春光学精密机械与物理研究所 | Compact type infrared optical system provided with free-form surface prism and large scanning field view |
| CN110133843A (en) * | 2019-04-30 | 2019-08-16 | 联想图像（天津）科技有限公司 | A kind of laser scan unit and laser printer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112731574A (en) | 2021-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2000031618A1 (en) | Optical scanning type touch panel | |
| EP1850165A1 (en) | Light Source System, Optical Scanner, Image Forming Apparatus, Light-Amount Control Method, Optical Scanning Method, and Image Forming Method | |
| US7649654B2 (en) | In-line laser scanning unit with multiple light beams | |
| JPH0799410B2 (en) | Deflection scanning optical system | |
| US20100046057A1 (en) | Micro electronic mechanical system oscillating laser scanning unit | |
| CN113238373B (en) | Laser scanning unit and laser printer | |
| US4323307A (en) | Light beam scanning apparatus | |
| EP3968077B1 (en) | Optical scanning unit and electronic photographic imaging apparatus | |
| CN111273254B (en) | Laser radar transmitting device and laser radar | |
| CN112731574B (en) | Prism and laser scanning unit | |
| CN114518579B (en) | Laser radar device | |
| JPH11305152A (en) | Scanning optical device | |
| US5267075A (en) | Optical unit for use in laser beam printer apparatus | |
| JP2527709B2 (en) | Optical spatial addressing system used for flat panel display | |
| CN216526736U (en) | Laser scanning unit | |
| JPS6410804B2 (en) | ||
| CN111273255B (en) | Laser radar transmitting device and laser radar | |
| US6339490B1 (en) | Optical scanning apparatus | |
| JPH09211357A (en) | Angle adjustment mechanism and adjustment method for spot light source array of scanning optical device | |
| JPH08248345A (en) | Optical scanner | |
| US7040031B2 (en) | Level device | |
| JP4393531B2 (en) | Optical scanning touch panel | |
| JP3355903B2 (en) | Optical scanning device | |
| CN110137805B (en) | Fast axis collimation structure of semiconductor laser array and laser radar | |
| JP2008216514A (en) | Optical scanning apparatus and image forming apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |