CN115541501A - Infrared spectrum appearance annex and infrared spectrum appearance with adjustable light path - Google Patents

Infrared spectrum appearance annex and infrared spectrum appearance with adjustable light path Download PDF

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Publication number
CN115541501A
CN115541501A CN202211116655.6A CN202211116655A CN115541501A CN 115541501 A CN115541501 A CN 115541501A CN 202211116655 A CN202211116655 A CN 202211116655A CN 115541501 A CN115541501 A CN 115541501A
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light
detection structure
solid
infrared spectrometer
test
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Chinese (zh)
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张�林
柏苑
刘如意
林敏�
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Photonic Integration Wenzhou Innovation Research Institute
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Photonic Integration Wenzhou Innovation Research Institute
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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
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N21/0303—Optical path conditioning in cuvettes, e.g. windows; adapted optical elements or systems; path modifying or adjustment
    • 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
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
    • 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
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
    • 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
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3577—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing liquids, e.g. polluted water
    • 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)
  • 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 discloses an optical path adjustable infrared spectrometer accessory and an infrared spectrometer, belongs to the technical field of infrared spectrometers, and can solve the problems that the existing infrared spectrometer is frequently disassembled when measuring substances in different forms, the operation is complicated, and the instrument fault is possibly caused. The infrared spectrometer accessory comprises: the solid-liquid detection structure is used for carrying out infrared test on a solid sample or a liquid sample; the gas detection structure is used for carrying out infrared test on a gas sample; and the first light path adjusting structure is arranged on the light incident side of the solid-liquid detection structure and the gas detection structure and is used for adjusting the light path of the test light so as to enable the test light to enter the solid-liquid detection structure or the gas detection structure. The invention is used for infrared spectrum detection.

Description

Infrared spectrum appearance annex and infrared spectrum appearance with adjustable light path
Technical Field
The invention relates to an infrared spectrometer accessory with an adjustable light path and an infrared spectrometer, and belongs to the technical field of infrared spectrometers.
Background
The infrared spectrometer is widely applied to the aspect of substance detection as an analytical instrument, and various measurement accessories for expanding application are also more. The infrared spectrometer has the advantages of higher resolution, wider spectral range, high detection speed and the like, and can be used in the field of detection of gas, liquid and solid samples.
When the infrared spectrometer is used for measuring solid (powder) or liquid substances, an Attenuated Total Reflection (ATR) accessory can be adopted, wherein the ATR accessory is a sample which is used for carrying out sample surface test and is inconvenient to prepare a sample by using a conventional method or cannot obtain satisfactory spectrum information when the sample is prepared by using the conventional method, such as an elastomer, a thin film and the like. When gaseous substances are measured, the ATR accessory needs to be removed, the gas cell accessory needs to be replaced, and then measurement and analysis of the gaseous substances need to be carried out.
At present, the variety of commercial ATR annex and gas cell annex is various, and current infrared spectrometer annex needs frequent change ATR annex and gas cell when accomplishing the analysis of different form samples, has not only increased the loaded down with trivial details degree of test like this, changes precision and the life-span of causing the influence to the annex, can make annex storehouse internal portion expose in the external environment often simultaneously, like this greatly increased the danger that dust, liquid, impurity etc. got into the annex storehouse body, seriously lead to damaging even.
Disclosure of Invention
The invention provides an infrared spectrometer accessory with an adjustable light path and an infrared spectrometer, which can solve the problems that the existing infrared spectrometer is frequently disassembled when measuring substances in different forms, the operation is complicated and the instrument is possibly broken down.
In one aspect, the present invention provides an infrared spectrometer accessory with an adjustable optical path, comprising:
the solid-liquid detection structure is used for carrying out infrared test on a solid sample or a liquid sample;
the gas detection structure is used for carrying out infrared test on a gas sample;
the first light path adjusting structure is arranged on the light inlet side of the solid-liquid detection structure and the gas detection structure and used for adjusting the light path of the test light so that the test light can be incident into the solid-liquid detection structure or the gas detection structure.
Optionally, the method further includes: and the second light path adjusting structure is arranged on the light emergent sides of the solid-liquid detection structure and the gas detection structure and is used for adjusting the light path of emergent light of the solid-liquid detection structure or the gas detection structure so as to enable the emergent light to be incident into the detection assembly.
Optionally, the first light path adjusting structure includes: the device comprises a first rotating reflection unit, a first paraboloid reflection unit and a second paraboloid reflection unit;
the first rotary reflecting unit is used for reflecting the test light rays to the first parabolic reflecting unit or the second parabolic reflecting unit;
the first paraboloid reflection unit is arranged on the light incident side of the solid-liquid detection structure and used for converging the received test light and reflecting the converged test light into the solid-liquid detection structure;
the second parabolic reflecting unit is arranged on the light incident side of the gas detection structure and used for converging the received test light and reflecting the converged test light into the gas detection structure.
Optionally, the second light path adjusting structure includes: the second rotary reflecting unit, the third parabolic reflecting unit and the fourth parabolic reflecting unit;
the third parabolic reflecting unit is arranged on the light emergent side of the solid-liquid detection structure and used for converting emergent light rays of the solid-liquid detection structure into parallel light and reflecting the parallel light rays to the second rotary reflecting unit;
the fourth parabolic reflecting unit is arranged on the light emergent side of the gas detection structure and used for converting emergent light rays of the gas detection structure into parallel light and reflecting the parallel light rays to the second rotary reflecting unit;
the second rotary reflection unit is used for reflecting the received emergent light rays to the detection assembly.
Optionally, the first rotating reflection unit and the second rotating reflection unit each include:
a base;
the motor is arranged on the base;
the first bracket is arranged on the motor;
the double-sided reflector is arranged on the first bracket;
the motor is used for driving the first support and the double-sided reflecting mirror to rotate.
Optionally, the first parabolic reflecting unit, the second parabolic reflecting unit, the third parabolic reflecting unit, and the fourth parabolic reflecting unit each include:
a second bracket;
and the parabolic reflector is arranged on the second bracket.
Optionally, the first optical path adjusting structure further includes a first housing, and the first rotating reflection unit, the first parabolic reflection unit, and the second parabolic reflection unit are all disposed in the first housing; light inlet holes allowing test light to pass through are respectively formed in the positions, corresponding to the light inlet directions of the solid-liquid detection structure and the gas detection structure, of the first shell;
the second light path adjusting structure further comprises a second shell, and the second rotary reflecting unit, the third parabolic reflecting unit and the fourth parabolic reflecting unit are all arranged in the second shell; and light emitting holes allowing emergent light to pass through are respectively arranged at positions, corresponding to the light emitting directions of the solid-liquid detection structure and the gas detection structure, on the second shell.
Optionally, the solid-liquid detecting structure includes: the device comprises a first plane reflector, a second plane reflector, an ATR crystal and a pressure head;
the first plane mirror is used for reflecting the incident test light to the ATR crystal;
a solid sample or a liquid sample to be detected is placed on the ATR crystal;
the second plane mirror is used for reflecting light rays reflected by a contact surface of the ATR crystal and a solid sample or a liquid sample to be detected into the second light path adjusting structure;
the pressure head is arranged above the ATR crystal and used for pressing the solid sample to be detected on the ATR crystal.
Optionally, the gas detection structure includes:
the air chamber is provided with an air inlet and an air outlet;
the first lens is arranged close to the light incident side of the air chamber and used for converging incident test light;
and the second lens is arranged close to the light outlet side of the air chamber and used for converting the converged light rays passing through the gas sample to be detected into parallel light rays and transmitting the parallel light rays to the second light path adjusting structure.
In another aspect, the present invention provides an infrared spectrometer comprising:
the light source component is used for emitting test light;
the infrared spectrometer accessory is arranged on the light-emitting side of the light source component and used for carrying out infrared test on a solid sample, a liquid sample or a gas sample by using the test light;
and the detection component is arranged on the light-emitting side of the infrared spectrometer accessory and used for detecting the emergent light of the infrared spectrometer accessory.
The invention can produce beneficial effects that:
according to the infrared spectrometer accessory, the solid-liquid detection structure and the gas detection structure are integrated at the same time, and the first light path adjusting structure is used for switching the test light to selectively enter the solid-liquid detection structure or the gas detection structure, so that the quick qualitative test of three samples, namely solid, liquid and gas can be realized under the condition that the accessory is not replaced, and the problems that the accessory is frequently detached when the existing infrared spectrometer is used for measuring substances in different forms, the operation is complex and the instrument fault is possibly caused are solved.
Drawings
FIG. 1 is a schematic view of an infrared spectrometer accessory assembly provided by an embodiment of the invention;
FIG. 2 is a schematic illustration of a shutter of the first housing according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a right view and a left view of an infrared spectrometer accessory provided by an embodiment of the invention;
FIG. 4 is a schematic view of a first housing according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a parabolic reflecting unit according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a rotating reflection unit according to an embodiment of the present invention;
FIG. 7 is a schematic top view of an overall structure of an infrared spectrometer according to an embodiment of the present invention;
FIG. 8 is a schematic view of an overall structure of an infrared spectrometer according to an embodiment of the present invention;
FIG. 9 is a schematic view of a gas detection structure provided in an embodiment of the present invention;
FIG. 10 is an optical diagram of a gas detection structure provided in accordance with an embodiment of the present invention;
FIG. 11 is a schematic view of a solid-liquid detection structure provided in an embodiment of the present invention;
FIG. 12 is an optical diagram of a solid-liquid detection structure provided in an embodiment of the present invention;
FIG. 13 is a schematic diagram of optical path switching for an infrared spectrometer accessory provided in an embodiment of the present invention;
fig. 14 is a three-dimensional model diagram of the whole device of the infrared spectrometer provided by the embodiment of the invention.
List of parts and reference numerals:
10. a solid-liquid detection structure; 11. a first planar mirror; 12. a second planar mirror; 13. an ATR crystal; 14. a pressure head; 15. a base; 16. a wafer tray; 17. a first optical window; 18. a second optical window; 20. a gas detection structure; 21. an air chamber; 22. a first lens; 23. a second lens; 24. an air inlet; 25. an air outlet; 26. a third optical window; 27. a fourth optical window; 30. a first light path adjusting structure; 31. a first rotating reflection unit; 311. a base; 312. a motor; 313. a first bracket; 314. a double-sided mirror; 32. a first parabolic reflecting unit; 321. a second bracket; 322. a parabolic reflector; 33. a second parabolic reflecting unit; 34. a first housing; 341. a shutter; 40. a second optical path adjusting structure; 41. a second rotating reflection unit; 42. a third parabolic reflecting unit; 43. a fourth parabolic reflecting unit; 51. a light source; 52. an interferometer; 53. a first reflector; 54. a second reflector; 61. a third reflector; 62. and a detector.
Detailed Description
The present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.
An embodiment of the present invention provides an infrared spectrometer accessory with an adjustable optical path, as shown in fig. 1 to 14, including:
and the solid-liquid detection structure 10 is used for carrying out infrared test on the solid sample or the liquid sample.
Referring to fig. 11 and 12, the solid-liquid detecting structure 10 is responsible for solid and liquid sample testing of an infrared spectrometer, and specifically includes: a head 14, a base 15, an ATR crystal 13, a first optical window 17, a crystal plate 16, a first plane mirror 11, a second plane mirror 12, a second optical window 18.
Solid and liquid samples are placed on the contact surface of the ATR crystal 13, if solid or powder samples are measured, a pressure head 14 is needed to press the samples to enable the samples to be fully attached to the crystal surface, if liquid samples are measured, only the crystal surface needs to be coated, and if the liquid is volatile, the crystal surface can be covered by a cover cap.
A crystal plate 16 is provided on the susceptor 15 for placing the ATR crystal 13; the first light window 17 is arranged at the light inlet of the base 15; the second light window 18 is arranged at the light outlet of the base 15; the first plane mirror 11 is used for reflecting the incident test light to the ATR crystal 13, the test light is totally reflected at the contact surface between the ATR crystal 13 and the solid sample or liquid sample to be measured, and the second plane mirror 12 is used for reflecting the reflected light to the second optical path adjusting structure 40.
The solid-liquid detecting structure 10 is designed based on the principle of light internal reflection. When the test light enters the solid-liquid detection structure 10, the test light firstly passes through the first optical window 17, then is reflected to the ATR crystal 13 through the first plane reflector 11, then is totally reflected on the contact surface of the ATR crystal 13 and the test sample, and the reflected light is reflected by the second plane reflector 12 and then penetrates through the second optical window 18 to exit the solid-liquid detection structure 10.
A gas detection structure 20 for performing infrared testing on a gas sample.
Referring to fig. 9 and 10, the gas detection structure 20 is responsible for gas sample testing by an infrared spectrometer, and specifically includes: the third optical window 26, the first lens 22, the air inlet 24, the air outlet 25, the air chamber 21, the second lens 23 and the fourth optical window 27.
The third optical window 26 is arranged at the light inlet of the air chamber 21, and the fourth optical window 27 is arranged at the light outlet of the air chamber 21; the air inlet 24 and the air outlet 25 are both arranged on the air chamber 21; the first lens 22 and the second lens 23 are both arranged in the air chamber 21, and the first lens 22 is arranged close to the light inlet side of the air chamber 21 and used for converging the incident test light; the second lens 23 is disposed near the light-emitting side of the gas chamber 21, and is configured to convert the converged light passing through the gas sample to be measured into parallel light, and transmit the parallel light to the second light path adjusting structure 40.
During specific testing, a gas sample to be tested is filled in the gas chamber 21, the gas sample is injected from the gas inlet 24 of the gas chamber 21, and waste gas is discharged from the gas outlet 25. The incident test light enters the gas cell 21 through the third optical window 26, converges to the midpoint of the gas cell 21 through the first lens 22 and continues to diverge to exit the gas detection structure 20 through the second lens 23 and the fourth optical window 27.
And the first light path adjusting structure 30 is arranged on the light incident sides of the solid-liquid detection structure 10 and the gas detection structure 20, and is used for adjusting the light path of the test light so that the test light can be incident into the solid-liquid detection structure 10 or the gas detection structure 20.
Specifically, referring to the left diagram in fig. 3, the first optical path adjusting structure 30 includes: a first rotating reflecting unit 31, a first parabolic reflecting unit 32, and a second parabolic reflecting unit 33; the first rotary reflecting unit 31 is used for reflecting the test light to the first paraboloid reflecting unit 32 or the second paraboloid reflecting unit 33; the first paraboloid reflecting unit 32 is arranged on the light incident side of the solid-liquid detection structure 10, and is used for converging the received test light and reflecting the converged test light into the solid-liquid detection structure 10; the second parabolic reflecting unit 33 is disposed on the light incident side of the gas detecting structure 20, and is configured to converge and reflect the received test light to the gas detecting structure 20.
Further, the infrared spectrometer accessory may further include: and the second light path adjusting structure 40 is arranged on the light emitting sides of the solid-liquid detection structure 10 and the gas detection structure 20, and is used for adjusting the light path of the emergent light of the solid-liquid detection structure 10 or the gas detection structure 20 so that the emergent light can be incident into the detection assembly.
Specifically, referring to the right diagram in fig. 3, the second optical path adjusting structure 40 includes: a second rotating reflecting unit 41, a third parabolic reflecting unit 42, and a fourth parabolic reflecting unit 43.
The third parabolic reflecting unit 42 is arranged on the light emergent side of the solid-liquid detection structure 10, and is used for converting emergent light of the solid-liquid detection structure 10 into parallel light and reflecting the parallel light to the second rotary reflecting unit 41; the fourth parabolic reflecting unit 43 is disposed on the light emitting side of the gas detecting structure 20, and is configured to convert the emergent light of the gas detecting structure 20 into parallel light and reflect the parallel light to the second rotating reflecting unit 41; the second rotating reflection unit 41 is used for reflecting the received emergent light rays to the detection assembly.
Wherein, referring to fig. 6, the first rotating reflection unit 31 and the second rotating reflection unit 41 each include a base 311; a motor 312 disposed on the base 311; a first bracket 313 provided on the motor 312; a double-sided mirror disposed on the first bracket 313; the motor 312 is used for driving the first support 313 and the double-sided mirror to rotate.
In practical application, metal reflecting films, such as metal reflecting films made of gold, silver, aluminum and the like, can be plated on the two side surfaces of the double-sided reflector to improve the light reflectivity. In the embodiment of the present invention, the motor 312 is controlled to control the rotation of the double-sided mirror, and the incident light path can be selectively refracted into the gas detection structure 20 or the solid-liquid detection structure 10 by adjusting the angle of the double-sided mirror, so that the rapid qualitative test of three samples, i.e., solid, liquid and gas, can be realized without replacing accessories.
Referring to fig. 5, each of the first parabolic reflecting unit 32, the second parabolic reflecting unit 33, the third parabolic reflecting unit 42, and the fourth parabolic reflecting unit 43 includes: a second bracket 321; and a parabolic reflector 322 disposed on the second support 321.
In practical applications, a metal reflective film, such as a metal reflective film made of gold, silver, aluminum, or the like, may be plated on the surface of the parabolic reflector 322 to improve the light reflectivity. The parabolic reflector 322 may converge the test light reflected by the double-sided reflector and reflect the test light into the corresponding gas detection structure 20 or solid-liquid detection structure 10, or convert the emergent light of the gas detection structure 20 or solid-liquid detection structure 10 into parallel light and reflect the parallel light to the double-sided reflector, and further reflect the parallel light to the detection component by the double-sided reflector.
In the embodiment of the present invention, the first optical path adjusting structure 30 further includes a first housing 34, and the first rotating reflection unit 31, the first parabolic reflection unit 32, and the second parabolic reflection unit 33 are all disposed in the first housing 34; light inlet holes allowing test light to pass through are respectively formed in the first housing 34 at positions corresponding to the light inlet directions of the solid-liquid detection structure 10 and the gas detection structure 20.
The second optical path adjusting structure 40 further includes a second housing, and the second rotating reflection unit 41, the third parabolic reflection unit 42, and the fourth parabolic reflection unit 43 are all disposed in the second housing; light-emitting holes allowing emergent light to pass through are respectively arranged on the second shell at positions corresponding to the light-emitting directions of the solid-liquid detection structure 10 and the gas detection structure 20.
The light inlet hole, the light outlet hole and the parabolic reflector 322 corresponding to the solid-liquid detection structure 10 are coaxial with the solid-liquid detection structure 10; the light inlet, light outlet and parabolic reflector 322 corresponding to the gas detecting structure 20 are all coaxial with the gas detecting structure 20.
In practical applications, shielding plates 341 are disposed on the sides of the first casing 34 and the second casing away from the solid-liquid detecting structure 10 and the gas detecting structure 20, and the shielding plates 341 are used to cover the left and right sides of the infrared spectrometer accessory to prevent dust from entering, wherein small holes are left on the left and right side shielding plates 341 to allow incident light and emergent light to pass through, and the axis of the hole is on the same straight line with the center of the double-sided reflector.
Another embodiment of the present invention provides an infrared spectrometer, including: the light source component is used for emitting test light; the infrared spectrometer accessory is arranged on the light-emitting side of the light source component and used for carrying out infrared test on a solid sample, a liquid sample or a gas sample by using test light; and the detection component is arranged on the light-emitting side of the infrared spectrometer accessory and is used for detecting the emergent light of the infrared spectrometer accessory.
Wherein, as shown in fig. 7, the light source assembly may include: a light source 51, an interferometer 52, a first mirror 53 and a second mirror 54; the detection assembly may include a third mirror 61 and a detector 62.
Light emitted from the light source 51 is interfered by the interferometer 52 to form parallel interference light, and then reflected by the first reflector 53 and the second reflector 54 to form test light; the test light is selectively reflected to the parabolic reflector 322 corresponding to the gas detection structure 20 or the solid-liquid detection structure 10 by the rotatable double-sided reflector, and then is converged and reflected by the parabolic reflector 322 to enter the gas detection structure 20 or the solid-liquid detection structure 10; the light emitted from the gas detection structure 20 or the solid-liquid detection structure 10 is converted into parallel light by the corresponding parabolic reflector 322 and then reflected to the rotatable double-sided reflector, and the rotatable double-sided reflector is reflected to the third reflector 61 and then reflected to the detector 62 by the third reflector 61 to be received, so that the detection of the solid-liquid substance or the gas substance is finally completed.
According to the invention, the solid-liquid detection structure 10 and the gas detection structure 20 are integrated at the same time, and the first light path adjusting structure 30 is used for switching the test light to selectively enter the solid-liquid detection structure 10 or the gas detection structure 20, so that the quick qualitative test of three samples, namely solid, liquid and gas can be realized under the condition of not replacing accessories, and the problems that the accessories are frequently disassembled when the existing infrared spectrometer is used for measuring substances in different forms, the operation is complicated and the instrument is possibly in failure are solved.
Although the present invention has been described with reference to a few preferred embodiments, it should be understood that various changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. An optical path adjustable infrared spectrometer accessory, comprising:
the solid-liquid detection structure is used for carrying out infrared test on a solid sample or a liquid sample;
the gas detection structure is used for carrying out infrared test on a gas sample;
the first light path adjusting structure is arranged on the light inlet side of the solid-liquid detection structure and the gas detection structure and used for adjusting the light path of the test light so that the test light can be incident into the solid-liquid detection structure or the gas detection structure.
2. The infrared spectrometer accessory of claim 1, further comprising:
and the second light path adjusting structure is arranged on the light emergent side of the solid-liquid detection structure and the gas detection structure and is used for adjusting the light path of the emergent light of the solid-liquid detection structure or the gas detection structure so as to enable the emergent light to be incident into the detection assembly.
3. The infrared spectrometer accessory of claim 1, wherein the first optical path adjustment structure comprises: the device comprises a first rotating reflection unit, a first paraboloid reflection unit and a second paraboloid reflection unit;
the first rotary reflecting unit is used for reflecting the test light rays to the first parabolic reflecting unit or the second parabolic reflecting unit;
the first paraboloid reflection unit is arranged on the light incident side of the solid-liquid detection structure and used for converging the received test light and reflecting the converged test light into the solid-liquid detection structure;
the second parabolic reflecting unit is arranged on the light incident side of the gas detection structure and used for converging the received test light and reflecting the converged test light into the gas detection structure.
4. The infrared spectrometer accessory of claim 2, wherein the second optical path adjustment structure comprises: the second rotary reflecting unit, the third parabolic reflecting unit and the fourth parabolic reflecting unit;
the third parabolic reflecting unit is arranged on the light emergent side of the solid-liquid detection structure and used for converting emergent light rays of the solid-liquid detection structure into parallel light and reflecting the parallel light rays to the second rotary reflecting unit;
the fourth parabolic reflecting unit is arranged on the light emergent side of the gas detection structure and used for converting emergent light rays of the gas detection structure into parallel light and reflecting the parallel light rays to the second rotary reflecting unit;
the second rotary reflection unit is used for reflecting the received emergent light rays to the detection assembly.
5. The infrared spectrometer accessory of claim 3 or 4, wherein the first and second rotating reflective units each comprise:
a base;
the motor is arranged on the base;
the first bracket is arranged on the motor;
the double-sided reflector is arranged on the first bracket;
the motor is used for driving the first support and the double-sided reflecting mirror to rotate.
6. The infrared spectrometer accessory of claim 3 or 4, wherein the first, second, third and fourth parabolic reflecting units each comprise:
a second bracket;
and the parabolic reflector is arranged on the second bracket.
7. The infrared spectrometer accessory of claim 3 or 4, wherein the first optical path adjustment structure further comprises a first housing, the first rotating reflective element, the first parabolic reflective element, and the second parabolic reflective element being disposed within the first housing; light inlet holes allowing test light to pass through are respectively formed in the positions, corresponding to the light inlet directions of the solid-liquid detection structure and the gas detection structure, of the first shell;
the second optical path adjusting structure further comprises a second shell, and the second rotary reflecting unit, the third parabolic reflecting unit and the fourth parabolic reflecting unit are all arranged in the second shell; and light emitting holes allowing emergent light to pass through are respectively arranged at positions, corresponding to the light emitting directions of the solid-liquid detection structure and the gas detection structure, on the second shell.
8. The infrared spectrometer accessory of claim 1, wherein the solid-liquid detection structure comprises: the device comprises a first plane reflector, a second plane reflector, an ATR crystal and a pressure head;
the first plane mirror is used for reflecting the incident test light to the ATR crystal;
a solid sample or a liquid sample to be detected is placed on the ATR crystal;
the second plane mirror is used for reflecting light rays reflected by a contact surface of the ATR crystal and a solid sample or a liquid sample to be detected into the second light path adjusting structure;
the pressure head is arranged above the ATR crystal and used for pressing the solid sample to be detected on the ATR crystal.
9. The infrared spectrometer accessory of claim 1, wherein the gas detection structure comprises:
the air chamber is provided with an air inlet and an air outlet;
the first lens is arranged close to the light incident side of the air chamber and used for converging incident test light;
and the second lens is arranged close to the light outlet side of the air chamber and used for converting the converged light rays passing through the gas sample to be detected into parallel light rays and transmitting the parallel light rays to the second light path adjusting structure.
10. An infrared spectrometer, comprising:
the light source component is used for emitting test light;
the infrared spectrometer accessory of any one of claims 1 to 9, disposed on the light exit side of the light source assembly, for performing infrared testing on a solid sample, a liquid sample, or a gas sample using the test light;
and the detection component is arranged on the light-emitting side of the infrared spectrometer accessory and used for detecting the emergent light of the infrared spectrometer accessory.
CN202211116655.6A 2022-09-14 2022-09-14 Infrared spectrum appearance annex and infrared spectrum appearance with adjustable light path Pending CN115541501A (en)

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CN202211116655.6A CN115541501A (en) 2022-09-14 2022-09-14 Infrared spectrum appearance annex and infrared spectrum appearance with adjustable light path

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CN202211116655.6A CN115541501A (en) 2022-09-14 2022-09-14 Infrared spectrum appearance annex and infrared spectrum appearance with adjustable light path

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CN115541501A true CN115541501A (en) 2022-12-30

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