CN114062293A - High-stability double-interference optical system based on solid angle lens - Google Patents
High-stability double-interference optical system based on solid angle lens Download PDFInfo
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- CN114062293A CN114062293A CN202111426279.6A CN202111426279A CN114062293A CN 114062293 A CN114062293 A CN 114062293A CN 202111426279 A CN202111426279 A CN 202111426279A CN 114062293 A CN114062293 A CN 114062293A
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- 239000007787 solid Substances 0.000 title claims abstract description 16
- 230000003287 optical effect Effects 0.000 title claims abstract description 14
- 239000000126 substance Substances 0.000 claims description 6
- 238000002329 infrared spectrum Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000035939 shock Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
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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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N2021/3595—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using FTIR
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Abstract
The invention discloses a high-stability double-interference optical system based on a solid angle lens, which comprises a double light source, a movable lens, a beam splitter, a fixed plane mirror, a fixed angle lens and a detector, wherein the movable lens is arranged on the solid angle lens; the double light sources comprise near infrared light sources and middle infrared light sources, the movable mirror is formed by splicing two solid angle mirrors, a friction-free bearing is arranged at the center of mass of the movable mirror, the two beam splitters are arranged and are respectively arranged at two sides of the movable mirror, the two fixed plane mirrors and one fixed angle mirror are respectively arranged in the other three directions of the beam splitters except the direction close to one side of the movable mirror, and the detector is arranged at the tail end of a light path. The invention adopts the solid angle lens to effectively eliminate the additional optical path difference caused by factors such as swing, external vibration or external inclination and the like in the moving process of the movable lens, thereby improving the shock resistance of the instrument.
Description
Technical Field
The invention relates to the field of infrared detection instruments, in particular to a high-stability double-interference optical system based on a solid angle lens.
Background
The interferometer is the most important component of a fourier spectrometer, and the quality of the performance of the interferometer determines the quality of the fourier spectrometer. In traditional michelson interferometer working process, when the movable mirror moves, there is swing to a certain extent inevitable for two level mirrors are mutually not perpendicular, lead to the incident light can not penetrate the movable mirror directly or the direction of reflection light skew former incident light, thereby can not obtain the reverberation parallel with the incident light, influence the quality of interference light. The same effect is also produced by the vibration of the external environment.
Disclosure of Invention
The invention aims to overcome the problems and provide a high-stability double-interference optical system based on a solid angle lens. In order to achieve the purpose, the invention adopts the following technical scheme:
a high-stability double-interference optical system based on a solid angle lens comprises a double light source, a movable lens, a beam splitter, a fixed plane mirror, a fixed angle lens and a detector;
the double light sources comprise near infrared light sources and intermediate infrared light sources, the movable mirror is formed by splicing two solid angle mirrors, a friction-free bearing is arranged at the center of mass of the movable mirror, the quantity of the beam splitters is two, two fixed plane mirrors and one fixed angle mirror are arranged on the beam splitters in the other three directions except for being close to one side of the movable mirror, and the detector is arranged at the tail end of a light path.
As an improvement, the number of the fixed plane mirrors is four, and the fixed plane mirrors comprise a first fixed plane mirror, a second fixed plane mirror, a third fixed plane mirror and a fourth fixed plane mirror, wherein the first fixed plane mirror and the second fixed plane mirror are arranged on one side of the near-infrared light source, and the third fixed plane mirror and the fourth fixed plane mirror are arranged on one side of the intermediate-infrared light source.
As an improvement, the number of the detectors is two, and the detectors are used for respectively measuring the near infrared light source and the intermediate infrared light source.
As an improvement, an infrared spectrum standard substance with a specified thickness is arranged in the system.
The invention has the advantages that:
it can be known from the optical principle of the cube-corner mirror that when there is a small dimension error between the reflecting surfaces and the cube-corner mirror swings slightly along the axial direction, the direction of the reflected light will not change, and the reflected light can be emitted strictly in the direction parallel to the incident light.
The invention adopts the solid angle lens to effectively eliminate the additional optical path difference caused by factors such as swing, external vibration or external inclination and the like in the moving process of the movable lens, thereby improving the shock resistance of the instrument.
Drawings
Fig. 1 is a structural diagram of a high-stability dual interference optical system based on a cube-corner mirror in embodiment 1.
The labels in the figure are:
1-double light source, 11-near infrared light source, 12-intermediate infrared light source, 2-moving mirror, 21-solid angle mirror, 22-frictionless bearing, 3-beam splitter, 4-fixed plane mirror, 41-first fixed plane mirror, 42-second fixed plane mirror, 43-third fixed plane mirror, 44-fourth fixed plane mirror, 5-fixed angle mirror, 6-detector.
Detailed Description
The present invention will be described in detail and specifically with reference to the following examples so as to facilitate the understanding of the present invention, but the following examples do not limit the scope of the present invention.
Example 1
The embodiment discloses a high-stability double-interference optical system based on a solid angle lens, which comprises a double light source 1, a movable lens 2, a beam splitter 3, a fixed plane mirror 4, a fixed angle lens 5 and a detector 6.
The dual light source 1 includes a near infrared light source 11 and a mid infrared light source 12. The movable mirror 2 is formed by splicing two solid angle mirrors 21, and a frictionless bearing 22 is arranged at the mass center of the movable mirror. The number of the beam splitters 3 is two, the two beam splitters are respectively arranged on two sides of the movable mirror 2, and two fixed plane mirrors 4 and one fixed angle mirror 5 are respectively arranged on the beam splitters 3 except for the other three directions close to one side of the movable mirror 2. The detector 6 is arranged at the end of the light path.
The number of fixed flat mirrors 4 is four, and includes a first fixed flat mirror 41, a second fixed flat mirror 42, a third fixed flat mirror 43, and a fourth fixed flat mirror 44. The first fixed plane mirror 41 and the second fixed plane mirror 42 are provided on the near-infrared light source 11 side, and the third fixed plane mirror 43 and the fourth fixed plane mirror 44 are provided on the mid-infrared light source 12 side.
The number of the detectors 6 is two, and the detectors measure the near-infrared light source 11 and the intermediate-infrared light source 12 respectively.
The infrared spectrum standard substance with the designated thickness is arranged in the system, so that the automatic calibration can be realized when the system is operated. The standard substance has long-term stability, and the accuracy and repeatability of the infrared wavelength and the transmittance of the standard substance are calibrated at any time, so that the long-term stability of the standard substance is kept.
The embodiments of the present invention have been described in detail above, but they are merely exemplary, and the present invention is not equivalent to the above described embodiments. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, it is intended that all equivalent alterations and modifications be included within the scope of the invention, without departing from the spirit and scope of the invention.
Claims (4)
1. A high-stability double-interference optical system based on a solid angle lens is characterized by comprising a double light source, a movable lens, a beam splitter, a fixed plane mirror, a fixed angle lens and a detector;
the double light sources comprise near infrared light sources and intermediate infrared light sources, the movable mirror is formed by splicing two solid angle mirrors, a friction-free bearing is arranged at the center of mass of the movable mirror, the quantity of the beam splitters is two, two fixed plane mirrors and one fixed angle mirror are arranged on the beam splitters in the other three directions except for being close to one side of the movable mirror, and the detector is arranged at the tail end of a light path.
2. The system of claim 1, wherein the number of the fixed plane mirrors is four, and the fixed plane mirrors comprise a first fixed plane mirror, a second fixed plane mirror, a third fixed plane mirror and a fourth fixed plane mirror, the first fixed plane mirror and the second fixed plane mirror are disposed on the near-infrared light source side, and the third fixed plane mirror and the fourth fixed plane mirror are disposed on the mid-infrared light source side.
3. The high-stability dual-interference optical system based on the cube-corner mirror is characterized in that the number of the detectors is two, and the detectors are used for respectively measuring a near-infrared light source and a middle-infrared light source.
4. The high-stability dual-interference optical system based on the cube-corner mirror is characterized in that infrared spectrum standard substances with specified thickness are arranged in the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111426279.6A CN114062293A (en) | 2021-11-27 | 2021-11-27 | High-stability double-interference optical system based on solid angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111426279.6A CN114062293A (en) | 2021-11-27 | 2021-11-27 | High-stability double-interference optical system based on solid angle lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114062293A true CN114062293A (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111426279.6A Pending CN114062293A (en) | 2021-11-27 | 2021-11-27 | High-stability double-interference optical system based on solid angle lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114062293A (en) |
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2021
- 2021-11-27 CN CN202111426279.6A patent/CN114062293A/en active Pending
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