CN111122471A - Laser receiver erection equipment - Google Patents
Laser receiver erection equipment Download PDFInfo
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- CN111122471A CN111122471A CN201911377911.5A CN201911377911A CN111122471A CN 111122471 A CN111122471 A CN 111122471A CN 201911377911 A CN201911377911 A CN 201911377911A CN 111122471 A CN111122471 A CN 111122471A
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- unit
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- laser receiver
- mounting
- refrigerating
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- 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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
- F25B9/04—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect using vortex effect
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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- Physics & Mathematics (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)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Lasers (AREA)
Abstract
The invention discloses laser receiver mounting equipment which comprises a mounting body, a temperature detection unit, a temperature control unit, an adjusting unit and a refrigerating unit, wherein the temperature detection unit is arranged on the mounting body; the mounting body is used for mounting a laser receiver; the temperature detection unit is arranged in the installation body and used for detecting the temperature of the installation body; the temperature control unit is used for receiving the signal transmitted by the temperature detection unit; the adjusting unit is used for adjusting the air flow entering the refrigerating unit so as to control the cold air flow input into the refrigerating channel by the refrigerating unit. The laser receiver mounting equipment disclosed by the invention reduces the working temperature of the laser receiver mounted on the mounting body by reducing the temperature of the mounting body so as to control the temperature of the laser receiver, thereby avoiding the influence on the measurement precision caused by the overlarge noise of the laser receiver due to the overhigh temperature or large temperature fluctuation of the laser receiver and improving the signal to noise ratio.
Description
Technical Field
The invention relates to the technical field of laser gas analysis instruments, in particular to laser receiver installation equipment.
Background
The Laser gas analyzer is a Laser gas analysis system based on semiconductor Laser absorption spectroscopy (DLAS) technology, and achieves the purposes of analysis and measurement by obtaining the concentration of gas through analyzing the selective absorption of Laser by the gas.
At present, laser receivers in laser gas analyzers in the market, especially laser gas analyzers applied to thermal measurement, are generally installed on a special support, but because the temperature of an installation support is close to the temperature of a high-temperature measurement air chamber, the temperature of the laser receivers is higher, the temperature fluctuation range is large, and under the condition, when the laser receivers receive laser signals, the signal noise is large due to temperature change or high temperature, and the measurement accuracy and the signal stability are seriously influenced.
Disclosure of Invention
In order to solve the above technical problem, it is desirable to provide a temperature-adjustable laser receiver mounting apparatus for adjusting the temperature of a laser receiver to improve the measurement accuracy of the laser receiver.
The technical scheme of the invention is realized as follows:
a laser receiver mounting device comprises a mounting body, a temperature detection unit, a temperature control unit, an adjusting unit and a refrigerating unit;
the mounting body is used for mounting a laser receiver, a refrigeration channel is formed in the mounting body, and the refrigeration channel penetrates through the mounting body;
the temperature detection unit is arranged in the installation body and used for detecting the temperature of the installation body and transmitting the detected signal to the temperature control unit;
the temperature control unit is connected with the adjusting unit and is used for receiving the signal transmitted by the temperature detection unit and then controlling the opening of the adjusting unit according to the signal fed back by the temperature detection unit;
the adjusting unit is connected with the refrigerating unit and used for adjusting the air flow entering the refrigerating unit so as to control the cold air flow input into the refrigerating channel by the refrigerating unit.
Preferably, the installation body is internally provided with an installation hole and an installation groove, the laser receiver is installed in the installation hole, the refrigeration channel is surrounded outside the installation hole, the installation groove and the refrigeration channel are arranged at intervals, and the temperature detection unit is installed in the installation groove.
Preferably, the cooling passage penetrates from one side of the mounting body to the other side thereof.
Preferably, the cooling channel penetrates from one side of the mounting body to the same side of the mounting body.
Preferably, the number of the refrigeration channels is one, and one refrigeration channel is arranged in a U shape.
Preferably, the number of the refrigeration channels is multiple, and the multiple refrigeration channels are arranged in parallel at intervals or in a crossed manner.
Preferably, the mounting groove is formed by being inwardly recessed from one side surface of the mounting body.
Preferably, the air inlet of the adjusting unit is connected with an air compressor, the air outlet of the adjusting unit is connected with the inlet of the refrigerating unit, and the outlet of the refrigerating unit is connected with the inlet of the refrigerating channel.
Preferably, the temperature detection unit is a temperature sensor; the temperature control unit is a temperature controller; the adjusting unit is a proportional valve; the refrigerating unit is a vortex tube refrigerator.
Preferably, the mounting body is of a square structure.
The laser receiver installation equipment provided by the embodiment of the invention has the advantages that the refrigeration channel is arranged on the installation body for installing the laser receiver, the temperature detection unit arranged in the installation body is adopted to detect the temperature of the installation body firstly and transmit the detected signal to the temperature control unit, the temperature control unit receives the signal transmitted by the temperature detection unit and then controls the opening degree of the adjusting unit according to the signal fed back by the temperature detection unit, so that the adjusting unit can continuously adjust the flow of cold air conveyed into the refrigeration channel by the refrigeration unit according to different temperatures detected by the temperature detection unit, the adjusting unit is closed under the condition of being lower than the preset value so as to close the cold air entering the refrigeration channel, and under the condition of being higher than the preset value, the cold air passes through the refrigeration channel so as to reduce the temperature of the installation body to the preset value, in order to reach the effect of accuse temperature, through reducing like this the temperature of installation body reduces install in the installation body laser receiver's operating temperature to this controls laser receiver's temperature effectively avoids laser receiver's temperature too high or temperature fluctuation is big leads to laser receiver noise too big and influence measurement accuracy, has improved the SNR effectively.
Drawings
Fig. 1 is a schematic structural view of a laser receiver mounting apparatus provided in the present invention;
fig. 2 is a cross-sectional view of the mounting body shown in fig. 1.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a laser receiver 10 installation apparatus according to the present invention. The laser receiver 10 mounting apparatus includes a mounting body 1, and a temperature detection unit 3, a temperature control unit 5, an adjustment unit 7, and a refrigeration unit 9 connected in this order.
Fig. 2 is a cross-sectional view of the mounting body shown in fig. 1. The mounting body 1 is of a square structure and is used for mounting the laser receiver 10. Refrigeration passageway 11, mounting hole 13 and mounting groove 15 have been seted up in the installation body 1, refrigeration passageway 11 runs through installation body 1. The laser receiver 10 is installed in the installation hole 13, and the refrigeration channel 11 is surrounded outside the installation hole 13.
The temperature detection unit 3 is configured to detect a temperature of the mounting body 1 and transmit a detected signal to the temperature control unit 5. The temperature control unit 5 is connected to the adjusting unit 7, and is configured to receive the signal transmitted by the temperature detecting unit 3 and then control the opening of the valve port of the adjusting unit 7 to open or close according to the signal fed back by the temperature detecting unit 3. The adjusting unit 7 is connected to the refrigerating unit 9, and is configured to adjust an air flow rate entering the refrigerating unit 9 to control a cold air flow rate of the refrigerating unit 9 into the refrigerating channel 11. When the temperature of the installation body 1 is detected to be lower than a preset value, the valve of the adjusting unit 7 is closed, and the flow entering the refrigerating channel 11 is zero; when the temperature of the installation body 1 is detected to be higher than a preset value, the valve of the adjusting unit 7 is opened, and cold air passes through the refrigeration channel 11 to reduce the temperature of the installation body 1 to the preset value, so as to achieve the effect of controlling the temperature, so that the working temperature of the laser receiver 10 installed on the installation body 1 is reduced by reducing the temperature of the installation body 1, the temperature of the laser receiver 10 is controlled, the phenomenon that the measurement precision is affected due to the fact that the noise of the laser receiver 10 is too large due to the fact that the temperature of the laser receiver 10 is too high or the temperature fluctuation is large is avoided, and the signal-to-noise ratio is effectively improved.
Air compressor is connected to the air inlet of regulating unit 7, air outlet of regulating unit 7 is connected the air intake of refrigerating unit 9, the air conditioning outlet connection of refrigerating unit 9 the entry of refrigeration passageway 11, process hot-air after the refrigeration passageway 11 heat transfer is followed the export of refrigeration passageway 11 is discharged. When the temperature control device works, the temperature control unit 5 receives a temperature signal of the temperature detection unit 3, when the temperature is lower than a set value, the temperature control unit 5 outputs a turn-off signal to the adjusting unit 7, and the turn-off signal received by the adjusting unit 7 closes the valve; when the temperature is higher than the setting value, temperature control unit 5 output control signal control regulating unit 7 adjusts the aperture size of regulating unit 7 valve, and compressed air passes through regulating unit 7's flow and pressure can be along with regulating unit 7's aperture size change, get into from air intlet when compressed air refrigerating unit 9 back, refrigerating unit 9's air conditioning export output air conditioning, air conditioning get into refrigerating channel 11's entry flows through refrigerating channel 11 takes away behind the heat of installation body 1 the export of refrigerating channel 11 is discharged. The higher the temperature of the installation body 1 is, the larger the temperature control unit 5 controls the adjusting unit 7 to open the valve thereof, the larger the amount of compressed air entering the refrigerating unit 9 is, the more the amount of cold air is, the more the cold air enters the refrigerating channel 11, and after a period of time, the temperature of the installation body 1 is reduced to a set value, so that the temperature control effect is achieved.
Specifically, in the present embodiment, the temperature detecting unit 3 is a temperature sensor.
Specifically, in this embodiment, the refrigeration unit 9 is a vortex tube refrigerator, and the operating principle of the vortex tube refrigerator is as follows: high-pressure gas enters from the nozzle, and enters the vortex chamber at a high speed in a tangential direction after being expanded and accelerated in the nozzle, the gas rotates and advances after forming a vortex, the gas along the wall of the vortex tube rubs with the tube wall, the temperature can be rapidly increased, one part of the gas is discharged from the hot end of the vortex tube, and the temperature of the gas is higher than that of inlet compressed gas; one part returns along the central line to form a backflow, the gas and the vortex close to the pipe wall are in reverse direction, and the heat exchange is continuously carried out, so that the temperature of the gas is gradually reduced, a cold gas flow is formed, and the cold gas flow is discharged from the cold end of the vortex pipe.
Specifically, in this embodiment, the adjusting unit 7 is a proportional valve, and the working principle of the proportional valve is as follows: the instruction signal is amplified in power by the proportional amplifier, and proportionally outputs current to the proportional electromagnet of the proportional valve, and the proportional electromagnet outputs force and proportionally moves the position of the valve core, so that the flow of the fluid can be proportionally controlled.
Specifically, in the present embodiment, the temperature control unit 5 is a temperature controller.
The cooling channel 11 may be arranged in various ways, and the cooling channel 11 may run through from one side of the installation body 1 to the other side thereof, that is, the cooling channel 11 runs through from one side of the installation body 1 to the opposite side thereof or the cooling channel 11 runs through from one side of the installation body 1 to the adjacent side thereof; the cooling duct 11 may extend from one side of the mounting body 1 to the same side thereof. Specifically, in this embodiment, the cooling channel 11 penetrates from one side of the installation body 1 to the same side thereof, that is, the inlet of the cooling channel 11 enters from one side, penetrates through the inside of the installation body 1, and then exits from the same side. The refrigerating channel 11 is one, the refrigerating channel 11 is arranged in a U shape, and the mounting hole 13 is formed in the U-shaped concave position.
Of course, in other embodiments, the number of the refrigeration channels 11 is multiple, and multiple refrigeration channels 11 may be arranged in parallel at intervals, and this structure is that multiple refrigeration channels 11 are distributed at intervals from the thickness direction of the installation body 1; the plurality of refrigeration channels 11 may be arranged in a crossed manner, that is, the plurality of refrigeration channels 11 are inserted into the installation body 1 and are communicated in a crossed manner inside the installation body, so that when the temperature detection unit 3 detects that the temperature of the installation body 1 is high, the temperature can be rapidly reduced through the plurality of refrigeration channels 11, the refrigeration speed is increased, and the application range of the installation equipment of the laser receiver 10 is effectively expanded. The number of the cooling channels 11 may be two, three, or more than three, and may be specifically set according to a test environment where the laser receptor is located.
The laser receiver installation equipment provided by the embodiment of the invention has the advantages that the refrigeration channel is arranged on the installation body for installing the laser receiver, the temperature detection unit arranged in the installation body is adopted to detect the temperature of the installation body firstly and transmit the detected signal to the temperature control unit, the temperature control unit receives the signal transmitted by the temperature detection unit and then controls the opening degree of the adjusting unit according to the signal fed back by the temperature detection unit, so that the adjusting unit can continuously adjust the flow of cold air conveyed into the refrigeration channel by the refrigeration unit according to different temperatures detected by the temperature detection unit, the adjusting unit is closed under the condition of being lower than the preset value so as to close the cold air entering the refrigeration channel, and under the condition of being higher than the preset value, the cold air passes through the refrigeration channel so as to reduce the temperature of the installation body to the preset value, in order to reach the effect of accuse temperature, through reducing like this the temperature of installation body reduces install in the installation body laser receiver's operating temperature to this controls laser receiver's temperature effectively avoids laser receiver's temperature too high or temperature fluctuation is big leads to laser receiver noise too big and influence measurement accuracy, has improved the SNR effectively.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The laser receiver mounting equipment is characterized by comprising a mounting body, a temperature detection unit, a temperature control unit, an adjusting unit and a refrigerating unit;
the mounting body is used for mounting a laser receiver, a refrigeration channel is formed in the mounting body, and the refrigeration channel penetrates through the mounting body;
the temperature detection unit is arranged in the installation body and used for detecting the temperature of the installation body and transmitting the detected signal to the temperature control unit;
the temperature control unit is connected with the adjusting unit and is used for receiving the signal transmitted by the temperature detection unit and then controlling the opening of the adjusting unit according to the signal fed back by the temperature detection unit;
the adjusting unit is connected with the refrigerating unit and used for adjusting the air flow entering the refrigerating unit so as to control the cold air flow input into the refrigerating channel by the refrigerating unit.
2. The laser receiver installation device according to claim 1, wherein a mounting hole and a mounting groove are further formed in the installation body, the laser receiver is installed in the mounting hole, the refrigeration channel is arranged around the mounting hole, the mounting groove and the refrigeration channel are arranged at intervals, and the temperature detection unit is installed in the mounting groove.
3. The laser receiver mounting device according to claim 1, wherein the cooling passage penetrates from one side of the mounting body to the other side thereof.
4. The laser receiver mounting device according to claim 1, wherein the cooling channel penetrates from one side of the mounting body to the same side thereof.
5. The laser receiver mounting device according to claim 3 or 4, wherein the number of the cooling passages is one, and one cooling passage is provided in a U-shape.
6. The laser receiver installation apparatus according to claim 3 or 4, wherein the cooling passage is provided in a plurality, and the plurality of cooling passages are arranged in parallel at intervals or in a cross arrangement.
7. The laser receiver mounting apparatus according to claim 2, wherein the mounting groove is formed recessed inward from a side surface of the mounting body.
8. The laser receiver installation apparatus according to claim 1, wherein the air inlet of the regulating unit is connected to an air compressor, the air outlet of the regulating unit is connected to the inlet of the refrigerating unit, and the outlet of the refrigerating unit is connected to the inlet of the refrigerating channel.
9. The laser receiver mounting apparatus according to claim 1, wherein the temperature detection unit is a temperature sensor; the temperature control unit is a temperature controller; the adjusting unit is a proportional valve; the refrigerating unit is a vortex tube refrigerator.
10. The laser receiver mounting device according to claim 1, wherein the mounting body is of a square configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377911.5A CN111122471A (en) | 2019-12-27 | 2019-12-27 | Laser receiver erection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911377911.5A CN111122471A (en) | 2019-12-27 | 2019-12-27 | Laser receiver erection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111122471A true CN111122471A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911377911.5A Pending CN111122471A (en) | 2019-12-27 | 2019-12-27 | Laser receiver erection equipment |
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| Country | Link |
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| CN (1) | CN111122471A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116565671A (en) * | 2023-07-12 | 2023-08-08 | 中国科学院长春光学精密机械与物理研究所 | Temperature control device and temperature control method for laser |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1431269A (en) * | 1972-11-28 | 1976-04-07 | Amg Zzrbier Ltdbird T J | Detection of gas leakage |
| US20030159472A1 (en) * | 2002-02-22 | 2003-08-28 | Sumitomo Electric Industries, Ltd. | Apparatus for producing a soot preform |
| CN1794521A (en) * | 2005-12-22 | 2006-06-28 | 天津大学 | Phase miss match compensation heater of high power internal cavity freguency multiplier laser and its method |
| CN201191383Y (en) * | 2008-05-19 | 2009-02-04 | 聚光科技（杭州）有限公司 | Temperature control device |
| CN101792021A (en) * | 2010-01-22 | 2010-08-04 | 华中科技大学 | Rotating body surface non-contact icing detector |
| CN204462002U (en) * | 2014-12-31 | 2015-07-08 | 郑州光力科技股份有限公司 | The detecting devices of a kind of gas absorption pool device and laser measurement gas concentration |
| EP3279596A1 (en) * | 2016-08-04 | 2018-02-07 | Franke Industrieofen-Service GmbH | Instrument bracket and method for liquid-free instrument cooling and system for liquid-free monitoring of the interior of high temperature systems |
| CN208238931U (en) * | 2018-06-08 | 2018-12-14 | 济南森峰科技有限公司 | A kind of superpower cooling laser power meter |
| CN109085201A (en) * | 2018-09-12 | 2018-12-25 | 南京信息工程大学 | A kind of ultra-low humidity dew point hygrometer and its temprature control method |
| CN209626640U (en) * | 2019-04-08 | 2019-11-12 | 北京理工大学 | A kind of clamping device of the double-frequency microchip laser tunable for frequency difference |
-
2019
- 2019-12-27 CN CN201911377911.5A patent/CN111122471A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1431269A (en) * | 1972-11-28 | 1976-04-07 | Amg Zzrbier Ltdbird T J | Detection of gas leakage |
| US20030159472A1 (en) * | 2002-02-22 | 2003-08-28 | Sumitomo Electric Industries, Ltd. | Apparatus for producing a soot preform |
| CN1794521A (en) * | 2005-12-22 | 2006-06-28 | 天津大学 | Phase miss match compensation heater of high power internal cavity freguency multiplier laser and its method |
| CN201191383Y (en) * | 2008-05-19 | 2009-02-04 | 聚光科技（杭州）有限公司 | Temperature control device |
| CN101792021A (en) * | 2010-01-22 | 2010-08-04 | 华中科技大学 | Rotating body surface non-contact icing detector |
| CN204462002U (en) * | 2014-12-31 | 2015-07-08 | 郑州光力科技股份有限公司 | The detecting devices of a kind of gas absorption pool device and laser measurement gas concentration |
| EP3279596A1 (en) * | 2016-08-04 | 2018-02-07 | Franke Industrieofen-Service GmbH | Instrument bracket and method for liquid-free instrument cooling and system for liquid-free monitoring of the interior of high temperature systems |
| CN208238931U (en) * | 2018-06-08 | 2018-12-14 | 济南森峰科技有限公司 | A kind of superpower cooling laser power meter |
| CN109085201A (en) * | 2018-09-12 | 2018-12-25 | 南京信息工程大学 | A kind of ultra-low humidity dew point hygrometer and its temprature control method |
| CN209626640U (en) * | 2019-04-08 | 2019-11-12 | 北京理工大学 | A kind of clamping device of the double-frequency microchip laser tunable for frequency difference |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116565671A (en) * | 2023-07-12 | 2023-08-08 | 中国科学院长春光学精密机械与物理研究所 | Temperature control device and temperature control method for laser |
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Application publication date: 20200508 |
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