CN112198124A - Optical probe of optical fiber type full spectrum water quality sensor - Google Patents
Optical probe of optical fiber type full spectrum water quality sensor Download PDFInfo
- Publication number
- CN112198124A CN112198124A CN202011096711.5A CN202011096711A CN112198124A CN 112198124 A CN112198124 A CN 112198124A CN 202011096711 A CN202011096711 A CN 202011096711A CN 112198124 A CN112198124 A CN 112198124A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- light
- optical
- water quality
- channel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to the technical field of water quality monitoring equipment, and provides an optical probe of an optical fiber type full-spectrum water quality sensor, which comprises: the body is provided with a blind groove, a measuring channel and a reference channel which are arranged in parallel are arranged in the body, and the measuring channel penetrates through the blind groove; a collimating lens is arranged at the inlet of the measuring channel, and a coupling lens is arranged at the outlet of the measuring channel; the input end of the optical fiber beam splitter is used for receiving the light beam provided by the light source; measuring light emitted by a first output end of the optical fiber beam splitter enters a first input end of the optical fiber coupler after sequentially passing through the collimating lens and the coupling lens; reference light emitted by a second output end of the optical fiber beam splitter positioned in the reference channel enters a second input end of the optical fiber coupler; the light beam emitted from the output end of the optical fiber coupler enters the spectrometer. The optical probe of the optical fiber type full-spectrum water quality sensor can stably output measuring light and reference light, ensures the consistency of zero calibration and improves the stability and the practicability of the sensor.
Description
Technical Field
The invention relates to the technical field of water quality monitoring equipment, in particular to an optical probe of an optical fiber type full-spectrum water quality sensor.
Background
The full spectrum water quality on-line monitoring device can simultaneously monitor COD, temperature, TOC, BOD, O3, turbidity, organic matters (benzene), nitrate nitrogen and other pollutant parameters, does not produce secondary pollution discharge, and is widely applied to water quality monitoring.
The key technology of the full-spectrum water quality sensor is that a wide-spectrum light source is required to perform light splitting according to a certain proportion, and stable and alternate output of two beams of light intensity is ensured, so that accuracy of zero calibration is ensured. Meanwhile, it is necessary to simplify the structure as much as possible and to miniaturize the system. However, the existing full-spectrum water quality sensor has the problems of inaccurate zero calibration and complex structure.
Disclosure of Invention
Technical problem to be solved
In view of the technical defects and application requirements, the application provides an optical probe of an optical fiber type full-spectrum water quality sensor, so as to solve the problem that the existing full-spectrum water quality sensor is complex in structure.
(II) technical scheme
In order to solve the above problems, the present invention provides an optical probe of an optical fiber type full spectrum water quality sensor, comprising: the device comprises a light source, a spectrometer, an optical fiber beam splitter, an optical fiber coupler and a body provided with a blind groove, wherein a measurement channel and a reference channel which are arranged in parallel are arranged in the body, and the measurement channel penetrates through the blind groove; a collimating lens is arranged at the inlet of the measuring channel, and a coupling lens is arranged at the outlet of the measuring channel;
the input end of the optical fiber beam splitter is used for receiving the light beam provided by the light source; the measuring light emitted by the first output end of the optical fiber beam splitter enters the first input end of the optical fiber coupler after sequentially passing through the collimating lens and the coupling lens; reference light emitted from a second output end of the fiber optic splitter positioned in the reference channel enters a second input end of the fiber optic coupler; and the light beam emitted from the output end of the optical fiber coupler enters the spectrometer.
Wherein, an optical switch for controlling the transmission sequence of the measuring light and the reference light is arranged on the optical fiber beam splitter.
The optical fiber beam splitter distributes the intensities of the measuring light and the reference light according to a plurality of preset proportions.
And the collimating lens and the coupling lens are quartz or sapphire lenses.
Wherein the reference light is transmitted through an optical fiber.
(III) advantageous effects
The invention provides an optical probe of an optical fiber type full-spectrum water quality sensor.A light beam emitted by a light source is divided into two beams of light in a certain proportion by a 1 multiplied by 2 optical fiber beam splitter, the two beams of light are respectively named as measuring light and reference light, firstly, the measuring light passes through a collimating lens to realize remote transmission in a measuring channel, and finally, the measuring light is coupled into a branch of an optical fiber coupler through a coupling lens to enter a spectrometer to realize measurement; and secondly, the reference light is directly connected with the other branch of the optical fiber coupler through the optical fiber positioned in the reference channel and enters the spectrometer, so that the measurement of the reference light is realized. The difference from the traditional optical fiber beam splitting method is that the optical probe of the optical fiber type full-spectrum water quality sensor provided by the embodiment of the invention adopts a 2 x 1 optical fiber coupler at the receiving end, and the optical fiber coupler is directly connected with a spectrometer, so that the use of double probes is avoided, and the technical difficulty and the cost are reduced; the introduction of optical fiber light splitting enables the measuring light and the reference light to have stable output, so that the consistency of zero point calibration is ensured, and the stability and the practicability of the sensor are improved. In addition, the light splitting proportion of the optical fiber beam splitter can be controlled to realize the accurate control of the light intensity proportion of the reference light and the measured light, and the adjustment by using an attenuation sheet is not needed, so that the system structure can be simplified and the system stability can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an optical probe of an optical fiber type full-spectrum water quality sensor according to an embodiment of the present invention;
wherein, 1, a light source; 2. an optical switch; 3. an optical fiber beam splitter; 4. a collimating lens; 5. a measurement channel; 6. a reference channel; 7. a coupling lens; 8. a fiber coupler; 9. a spectrometer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an optical probe of an optical fiber type full-spectrum water quality sensor according to an embodiment of the present invention, and as shown in fig. 1, the optical probe of the optical fiber type full-spectrum water quality sensor according to the embodiment of the present invention includes: the device comprises a light source 1, a spectrometer 9, an optical fiber beam splitter 3, an optical fiber coupler 8 and a body provided with a blind groove, wherein a measurement channel 5 and a reference channel 6 which are arranged in parallel are arranged in the body, and the measurement channel 5 penetrates through the blind groove; a collimating lens 4 is arranged at the inlet of the measuring channel 5, and a coupling lens 7 is arranged at the outlet of the measuring channel 5;
the input end of the optical fiber beam splitter 3 is used for receiving the light beam provided by the light source 1; the measuring light emitted by the first output end of the optical fiber beam splitter 3 enters the first input end of the optical fiber coupler 8 after passing through the collimating lens 4 and the coupling lens 7 in sequence; the reference light emitted from the second output end of the optical fiber beam splitter 3 positioned in the reference channel 6 enters the second input end of the optical fiber coupler 8; the light beam emitted from the output of the fiber coupler 8 enters the spectrometer 9.
It should be noted that the blind groove arranged on the body is used for placing a water sample to be detected, the measurement channel 5 is arranged through the blind groove, namely the measurement channel 5 comprises a first measurement channel and a second measurement channel, the first measurement channel is positioned on the left side of the blind groove, the right side of the first measurement channel is arranged close to the blind groove, an optical glass sheet is arranged at the joint of the right side of the first measurement channel and the blind groove, and the water sample to be detected in the blind groove is prevented from entering the first measurement channel by arranging the optical glass sheet; the second measurement channel is located the right side of blind groove, and the left side of second measurement channel is close to the blind groove and arranges, and the left side of second measurement channel and the department of meeting of blind groove are provided with another optical glass piece, prevent through setting up this optical glass piece that the water sample that awaits measuring in the blind groove from getting into the second measurement channel. Wherein, the left side of the first measuring channel is provided with a collimating lens 4, and the right side of the second measuring channel is provided with a coupling lens 7.
In the embodiment of the invention, a light beam emitted by a light source 1 is divided into two beams of light in a certain proportion by a 1 x 2 optical fiber beam splitter 3, the two beams of light are respectively named as measuring light and reference light, firstly, the measuring light passes through a collimating lens 4 to realize remote transmission in a measuring channel 5, and finally, the measuring light is coupled into a branch of an optical fiber coupler 8 through a coupling lens 7 and enters a spectrometer 9 to realize measurement; and secondly, the reference light is directly connected with the other branch of the optical fiber coupler 8 through the optical fiber positioned in the reference channel 6 and enters the spectrometer 9, so that the measurement of the reference light is realized. The difference from the traditional optical fiber beam splitting method is that the optical probe of the optical fiber type full-spectrum water quality sensor provided by the embodiment of the invention adopts the 2 x 1 optical fiber coupler 8 at the receiving end, and the optical fiber coupler 8 is directly connected with the spectrometer 9, so that the use of double probes is avoided, and the technical difficulty and the cost are reduced; the introduction of optical fiber light splitting enables the measuring light and the reference light to have stable output, so that the consistency of zero point calibration is ensured, and the stability and the practicability of the system are improved.
On the basis of the above-described embodiment, the optical switch 2 for controlling the transmission sequence of the measurement light and the reference light is provided on the fiber splitter 3.
In the embodiment of the invention, compared with the traditional control method for the reference light and the measuring light by using the chopper, the method is improved by using the optical switch 2, not only can the accurate control of the measuring light and the reference light be realized, but also the use of the traditional baffle motor is reduced, and the system structure is simplified. In addition, the use of the optical switch 2 enables the reference light to be directly connected with the spectrometer, the light does not need to go through the optical fiber to the space, and then goes through the space to the optical fiber, which is a complex process, so that the light loss is greatly reduced, the use of the lens is reduced, the cost is reduced, and the stability of the system is improved.
On the basis of the above-described embodiment, the fiber splitter 3 distributes the intensities of the measurement light and the reference light in a plurality of preset ratios.
In the embodiment of the invention, the light splitting ratio of the optical fiber beam splitter 3 can be controlled to realize the accurate control of the ratio of the reference light to the measured light intensity, the quantitative control of the output light intensity can be realized, and the adjustment by using an attenuation sheet is not needed, so that the system structure can be simplified and the system stability can be improved.
On the basis of the above embodiment, the light source is a halogen lamp, an LED lamp, or a xenon lamp.
In the embodiment of the present invention, a xenon lamp is taken as an example of the light source, and a full spectrum light source is provided by the xenon lamp.
It is understood that quartz or sapphire lenses are used for the collimating lens 4 and the coupling lens 7. The collimating lens 4 is used for realizing long-distance weak attenuation transmission of the measuring light, and the coupling lens 7 is used for realizing high-efficiency coupling of the measuring light into the spectrometer. The collimating lens 4 and the coupling lens 7 are quartz or sapphire lenses, so that the attenuation of ultraviolet and visible light can be reduced, and the measurement sensitivity of the sensor is improved.
On the basis of the above embodiment, in order to improve the stability of the system, the reference light is transmitted through an optical fiber.
On the basis of the above embodiment, the body is in the shape of a cuboid, and is made of stainless steel or engineering plastics.
In the embodiment of the present invention, the shape and size of the body are designed according to specific working conditions during experiments, and are not specifically limited herein. The body adopts stainless steel or engineering plastics to make, can prevent that the body from being corroded by the water sample that waits to detect to the structure that leads to the body destroys appears.
It should be noted that, in this embodiment, the measurement channel and the reference channel are located at different heights, both the measurement channel and the reference channel may be circular channels, and the diameter of the measurement channel is larger than that of the reference channel.
On the basis of the above embodiment, one end of the body is set to be open, and the light source 1 is placed in the open interior.
In the embodiment of the invention, the left side of the body is provided with the opening which can be respectively communicated with the measuring channel 5 and the reference channel 6. The size of the opening may be designed according to the size of the light source 1, and is not particularly limited herein.
According to the optical probe of the optical fiber type full-spectrum water quality sensor, a water sample to be measured is placed in a blind groove, a light beam emitted by a light source 1 is divided into two beams of light in a certain proportion through a 1 x 2 optical fiber beam splitter 3, the two beams of light are named as measuring light and reference light respectively, the measuring light and the reference light are transmitted in a long distance through a collimating lens 4 through the operation of an optical switch 2 arranged on the optical fiber beam splitter 3 and used for controlling the transmission sequence of the measuring light and the reference light, and the measuring light is coupled into a branch of an optical fiber coupler 8 through a coupling lens 7 and enters a spectrometer 9 to be measured; and secondly, the reference light is directly connected with the other branch of the optical fiber coupler 8 through the optical fiber positioned in the reference channel 6 and enters the spectrometer 9, so that the measurement of the reference light is realized. According to the optical probe of the optical fiber type full-spectrum water quality sensor, light is split by the optical fiber beam splitter, so that light spots of a light source can be converted from a linear light source to a point light source, and instability caused by accidental rotation of the light source is eliminated; the optical switch is used for controlling the emission sequence of the two light paths, the optical switch is small in size and superior to a chopper in structure, and meanwhile, due to the introduction of the optical switch, reference light can be directly connected with a spectrometer through an optical fiber without entering a space, so that the light loss is reduced, and the stability of an optical system is improved; the single collimating lens, the single coupling lens and the single probe are utilized, so that the cost is reduced, the stability of the system is enhanced, the volume of the system is reduced, the sensor is more miniaturized, and the cost is reduced; the problem that the zero calibration difficulty is increased due to unequal light intensity of reference light and measuring light in the prior art is solved by a light splitting method of the optical fiber beam splitter, transmission of all optical fibers of the reference light is achieved by introducing the optical switch, the use of a mechanical motor shutter is reduced, the stability of the system is improved, the volume of the system is reduced exponentially, the structure is simpler, and the system is lighter.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. An optical probe of an optical fiber type full-spectrum water quality sensor is characterized by comprising: the device comprises a light source, a spectrometer, an optical fiber beam splitter, an optical fiber coupler and a body provided with a blind groove, wherein a measurement channel and a reference channel which are arranged in parallel are arranged in the body, and the measurement channel penetrates through the blind groove; a collimating lens is arranged at the inlet of the measuring channel, and a coupling lens is arranged at the outlet of the measuring channel;
the input end of the optical fiber beam splitter is used for receiving the light beam provided by the light source; the measuring light emitted by the first output end of the optical fiber beam splitter enters the first input end of the optical fiber coupler after sequentially passing through the collimating lens and the coupling lens; reference light emitted from a second output end of the fiber optic splitter positioned in the reference channel enters a second input end of the fiber optic coupler; and the light beam emitted from the output end of the optical fiber coupler enters the spectrometer.
2. The optical probe of the fiber-type full-spectrum water quality sensor according to claim 1, wherein an optical switch for controlling the transmission sequence of the measurement light and the reference light is disposed on the fiber splitter.
3. The optical probe of claim 1, wherein the optical splitter distributes the intensities of the measurement light and the reference light according to a plurality of preset ratios.
4. The optical probe of the fiber-optic full-spectrum water quality sensor of claim 1, wherein the collimating lens and the coupling lens are quartz or sapphire lenses.
5. The optical probe of the fiber-optic full-spectrum water quality sensor of claim 1, wherein the reference light is transmitted through an optical fiber.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019111214420 | 2019-11-15 | ||
| CN201911121442 | 2019-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112198124A true CN112198124A (en) | 2021-01-08 |
Family
ID=74010039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011096711.5A Pending CN112198124A (en) | 2019-11-15 | 2020-10-14 | Optical probe of optical fiber type full spectrum water quality sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112198124A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108760A (en) * | 1994-08-31 | 1995-09-20 | 清华大学 | High-precision polarization-modulating type optical fiber sensor compensating method |
| CN102263367A (en) * | 2011-06-16 | 2011-11-30 | 清华大学 | System and method for improving low-pulse repetition frequency laser pulse optical-fiber amplification efficiency |
| CN102636881A (en) * | 2012-05-03 | 2012-08-15 | 福州百讯光电有限公司 | Adjustable light splitter |
| CN203455275U (en) * | 2013-08-16 | 2014-02-26 | 广州隆润光学仪器有限公司 | Near-infrared optical fiber type moisture measuring device |
| CN103616332A (en) * | 2013-12-10 | 2014-03-05 | 山东大学 | Gas detection system for eliminating influence of residual to-be-detected gas in photoelectric device |
| CN103969206A (en) * | 2014-04-23 | 2014-08-06 | 北京金达清创环境科技有限公司 | Multi-index water quality sensing probe based on ultraviolet visible absorption spectrum |
| CN104458587A (en) * | 2014-12-11 | 2015-03-25 | 上海交通大学 | Multichannel unmarked biosensing optical fiber system |
| CN105527274A (en) * | 2016-01-29 | 2016-04-27 | 华中科技大学 | Efficient multipath laser probe analysis system and method |
| CN105699294A (en) * | 2016-02-29 | 2016-06-22 | 中国工程物理研究院材料研究所 | Micro-nano optical sensor system capable of achieving concentration measurement of various gases |
| CN106568715A (en) * | 2016-09-30 | 2017-04-19 | 深圳市赛宝伦科技有限公司 | Online type full-spectrum water quality analyzer |
| CN108799930A (en) * | 2018-06-26 | 2018-11-13 | 南通皋强照明科技有限公司 | Optical fiber illuminating system with optical feedback return circuit |
| CN109342362A (en) * | 2018-09-28 | 2019-02-15 | 西安工业大学 | A kind of micro- priming system plasma refraction rate distributed in three dimensions test device |
-
2020
- 2020-10-14 CN CN202011096711.5A patent/CN112198124A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108760A (en) * | 1994-08-31 | 1995-09-20 | 清华大学 | High-precision polarization-modulating type optical fiber sensor compensating method |
| CN102263367A (en) * | 2011-06-16 | 2011-11-30 | 清华大学 | System and method for improving low-pulse repetition frequency laser pulse optical-fiber amplification efficiency |
| CN102636881A (en) * | 2012-05-03 | 2012-08-15 | 福州百讯光电有限公司 | Adjustable light splitter |
| CN203455275U (en) * | 2013-08-16 | 2014-02-26 | 广州隆润光学仪器有限公司 | Near-infrared optical fiber type moisture measuring device |
| CN103616332A (en) * | 2013-12-10 | 2014-03-05 | 山东大学 | Gas detection system for eliminating influence of residual to-be-detected gas in photoelectric device |
| CN103969206A (en) * | 2014-04-23 | 2014-08-06 | 北京金达清创环境科技有限公司 | Multi-index water quality sensing probe based on ultraviolet visible absorption spectrum |
| CN104458587A (en) * | 2014-12-11 | 2015-03-25 | 上海交通大学 | Multichannel unmarked biosensing optical fiber system |
| CN105527274A (en) * | 2016-01-29 | 2016-04-27 | 华中科技大学 | Efficient multipath laser probe analysis system and method |
| CN105699294A (en) * | 2016-02-29 | 2016-06-22 | 中国工程物理研究院材料研究所 | Micro-nano optical sensor system capable of achieving concentration measurement of various gases |
| CN106568715A (en) * | 2016-09-30 | 2017-04-19 | 深圳市赛宝伦科技有限公司 | Online type full-spectrum water quality analyzer |
| CN108799930A (en) * | 2018-06-26 | 2018-11-13 | 南通皋强照明科技有限公司 | Optical fiber illuminating system with optical feedback return circuit |
| CN109342362A (en) * | 2018-09-28 | 2019-02-15 | 西安工业大学 | A kind of micro- priming system plasma refraction rate distributed in three dimensions test device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4820045A (en) | Equipment for the emission and distribution of light by optical fibers, particularly for in-line spectrophotometric control with the aid of a double beam spectrophotometer | |
| US5825478A (en) | Multifunctional photometer apparatus | |
| EP0047094A1 (en) | Analytical optical instruments | |
| SU1743371A3 (en) | Device for optical determination of dimensions and number of suspended particles | |
| US6204919B1 (en) | Double beam spectrometer | |
| CA2515845A1 (en) | Light distribution system | |
| US20120327397A1 (en) | Optical flow cell detector | |
| US9909984B2 (en) | Multichannel label-free biosensing optical-fiber system | |
| US5745243A (en) | Photometer apparatus | |
| CN105137201B (en) | A kind of optical fiber insulator insertion loss detector | |
| CN112198124A (en) | Optical probe of optical fiber type full spectrum water quality sensor | |
| CN109991197A (en) | Measure the spectrophotometer and method of fluorescent characteristic | |
| CN112345528A (en) | Gas analysis device with automatic calibration function and calibration method | |
| Yu et al. | Optical methane sensor based on a fiber loop at 1665 nm | |
| CN104568147A (en) | Monochromator for microplate readers | |
| CN208091899U (en) | A kind of optical fibre light splitting measuring system | |
| CN105738081A (en) | Apparatus for collimating optical path and detecting relative spectral transmittance and detection method thereof | |
| CN207636477U (en) | A kind of Light Source Compensation update the system | |
| CN220231475U (en) | Water quality detection device | |
| Vaganov et al. | The parallel spectrum analyzer of optical signals | |
| Okishev et al. | Unique high-bandwidth UV fiber delivery system for the OMEGA diagnostics applications | |
| CN111239068A (en) | Water quality sensing device based on absorption spectroscopy method adjustable optical path | |
| CN106323972A (en) | Judging device for spectrophotometric titration end point | |
| JPH04294248A (en) | Flow cell for measuring transmitted light | |
| RU2012868C1 (en) | Single-beam multichannel analyzer |
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 |