Spectrum analyzer based on infrared single-point detector

Abstract

The utility model belongs to the field of spectral measurement, and particularly discloses a spectrum analyzer based on an infrared single-point detector, which comprises a slit, a collimating mirror, a grating, a condensing mirror, a linear motor and the infrared single-point detector, the slit is used for guiding in light to be measured; the collimating mirror is arranged on a light path of the slit leading-in light and is used for collimating the slit leading-in light and then reflecting the light; the grating is arranged on a light path of reflected light of the collimating mirror and is used for reflecting the reflected light of the collimating mirror at different diffraction angles; the condenser mirror is used for focusing the reflected light of the grating at different spatial positions; and the infrared single-point detector is connected with the linear motor and is used for moving under the driving of the linear motor, so that the light intensity at different spatial positions is measured, and the measurement of the light spectrum to be measured is further realized. According to the spectrum analyzer provided by the invention, the cost can be greatly saved, and the spectrum resolution can be effectively improved.

Description

Technical Field

[0001] The present application belongs to the field of spectral measurement, and more specifically, relates to a spectrum analyzer based on an infrared single-point detector. Background Art

[0002] Spectrum analyzer is a precision optical instrument that detects the spectral composition of an incident light beam. It is widely used in iron and steel metallurgy, non-ferrous metals, petrochemical industry, machinery manufacturing, energy and electricity, railway transportation, aerospace, and food hygiene.

[0003] At present, the spectrum analyzer is usually composed of a slit, a collimator, a focusing lens, a grating and an infrared CCD. Its working principle is: the light to be measured is introduced into the slit, and after passing through the slit, it is collimated by the collimator and reaches the grating, and after being diffracted by the grating, it reaches the focusing lens, and then is focused by the focusing lens to reach the infrared CCD. The infrared CCD measures the light intensity of different wavelengths in the light to be measured, and then realizes the spectrum of the light to be measured. However, the spectrum analyzer using the infrared CCD structure has the problem of high cost. In addition, the current infrared CCD has few pixel units, and the commonly used ones can only be 256 or 512 pixels, and the maximum can only be 1024 pixels, which makes the spectrum resolution of the spectrum analyzer low.

[0004] Therefore, how to solve the problems of high cost and low spectral resolution of spectrum analyzers is urgently needed. Summary of the invention

[0005] In view of the defects of the prior art, the purpose of the present application is to provide a spectrum analyzer based on an infrared single-point detector, aiming to solve the problems of high cost and low spectral resolution of traditional spectrum analyzers.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present application provides a spectrum analyzer based on an infrared single-point detector, comprising a housing, a slit is provided on the housing wall, and a collimating reflector, a grating, a focusing reflector, a linear motor and an infrared single-point detector are provided in the housing;

[0007] The slit is used for introducing the light to be measured;

[0008] The collimating reflector is arranged on the optical path of the light introduced by the slit, and is used to collimate the light introduced by the slit and then reflect it;

[0009] The grating is arranged on the optical path of the light reflected by the collimating reflector, and is used to reflect the reflected light of the collimating reflector at different diffraction angles;

[0010] The focusing reflector is used to focus the reflected light of the grating at different spatial positions;

[0011] The infrared single-point detector is connected to the linear motor and is used to move under the drive of the linear motor. The movement trajectory covers the focus position of the grating reflected light, thereby measuring the light intensity at different spatial positions and further measuring the light spectrum to be measured.

[0012] The spectrum analyzer based on the infrared single-point detector provided in the present application can measure the light spectrum to be measured by driving the infrared single-point detector through a linear motor, which can effectively save costs compared with the traditional measurement using an infrared CCD; in addition, since the photosensitive area of ​​the infrared single-point detector is small in size, the response speed can reach the picosecond level, and the linear motor has a large motion range, which can effectively improve the resolution of the spectrum measurement.

[0013] As further preferred, the slit is arranged on the bottom wall or the side wall of the shell.

[0014] As further preferred, the linear motor is controlled by a controller.

[0015] As a further preference, the controller adopts a single chip microcomputer controller.

[0016] As a further preference, the optical spectrum analyzer adopts a cross CT type optical path.

[0017] As a further preference, the optical spectrum analyzer adopts an M-type optical path. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a spectrum analyzer based on an infrared single-point detector provided in one embodiment of the present application;

[0019] Figure 2 It is a structural schematic diagram of a spectrum analyzer based on an infrared single-point detector provided in another embodiment of the present application.

[0020] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0021] 10 is a slit, 20 is a collimating reflector, 30 is a grating, 40 is a focusing reflector, 50 is an infrared single-point detector, 60 is a linear motor, and 70 is a housing. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0023] It should be understood that, in the description of the present application, the term "several" means at least one, such as one, two, etc., unless otherwise clearly and specifically defined; the term "plurality" means two or more, unless otherwise clearly and specifically defined; the terms "first" and "second" etc. are used to distinguish different objects rather than to describe a specific order of objects; the term "and / or" includes any and all combinations of one or more related listed items.

[0024] In addition, references throughout this specification to "one embodiment"; "one embodiment", "an example" or similar language indicate that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present application. Thus, appearances of the phrase "in one embodiment"; "in one embodiment" and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.

[0025] Figure 1 FIG. 1 is a schematic diagram of the structure of a spectrum analyzer based on an infrared single-point detector provided in an embodiment of the present application. Figure 1 As shown, the spectrum analyzer includes a housing 70 , a slit 10 is provided on the wall of the housing 70 , and a collimating reflector 20 , a grating 30 , a focusing reflector 40 , a linear motor 60 and an infrared single-point detector 50 are provided inside the housing 70 .

[0026] In this embodiment, the slit 10 may be disposed on the bottom wall of the housing 70 or the side wall of the housing 70 for introducing the light to be measured. Further, the slit 10 may be disposed as a slender structure.

[0027] The collimating reflector 20 is disposed on the optical path of the light introduced by the slit 10, and is used to collimate and reflect the light introduced by the slit 10. Furthermore, the collimating reflector 20 can be a spherical reflector.

[0028] The grating 30 is arranged on the optical path of the light reflected by the collimating reflector 20 and is used to reflect the light reflected by the collimating reflector 20 at different diffraction angles, that is, to divide the light reflected by the collimating reflector 20 into lights of different wavelengths and reflect them again.

[0029] The focusing reflector 40 is used to focus the reflected light of the grating 30 at different spatial positions in the housing 70. Furthermore, the focusing reflector 40 can be a spherical reflector.

[0030] The infrared single-point detector 50 is connected to the linear motor 60 and is used to move under the drive of the linear motor 60. The movement trajectory covers the focusing position of each wavelength of light in the reflected light of the grating 30, thereby measuring the light intensity at different spatial positions, that is, measuring the light intensity of different wavelengths, and then measuring the light spectrum to be measured.

[0031] In this embodiment, the linear motor 60 can be controlled by a controller, and the controller can preferably be a single-chip microcomputer controller, which has the advantages of simple control operation and low cost.

[0032] Specifically, the spectrum analyzer based on the infrared single-point detector provided in this embodiment can adopt a cross CT type optical path (see Figure 1 ) or M-type optical path (see Figure 2 ), the cross CT type optical path structure has the characteristics of compactness and high sensitivity, and the M type optical path structure has the characteristics of high resolution and better stray light performance. The specific selection can be made according to the actual situation, and this embodiment does not limit it.

[0033] like Figure 1 As shown, when a cross CT type optical path is adopted, the slit 10 can be arranged on the bottom wall of the housing 70; Figure 2 As shown, when an M-type optical path is adopted, the slit 10 can be set on the side wall of the housing 70.

[0034] The working principle of the spectrum analyzer based on the infrared single-point detector provided in this embodiment is: the light to be measured passes through the slit 10 and reaches the grating 30 after passing through the collimating reflector 20. The grating 30 reflects the light of different wavelengths of the light to be measured at different diffraction angles. The light then passes through the focusing reflector 40 to focus the light of different wavelengths at different positions in space. The linear motor 60 drives the infrared single-point detector 50 to measure the light intensity at different spatial positions, so as to obtain the spectrum of the light to be measured.

[0035] The spectrum analyzer based on the infrared single-point detector provided in this embodiment can measure the light spectrum to be measured by driving the infrared single-point detector with a linear motor, which can effectively save costs compared to traditional measurements using infrared CCDs. In addition, since the photosensitive area of ​​the infrared single-point detector is small in size, the response speed can reach the picosecond level, and the linear motor has a large motion range, which can effectively improve the resolution of spectral measurement.

[0036] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A spectrum analyzer based on an infrared single-point detector, characterized in that: It comprises a shell, a slit is arranged on the wall of the shell, and a collimating reflector, a grating, a focusing reflector, a linear motor and an infrared single-point detector are arranged inside the shell; The slit is used for introducing the light to be measured; The collimating reflector is arranged on the optical path of the light introduced by the slit, and is used to collimate the light introduced by the slit and then reflect it; The grating is arranged on the optical path of the light reflected by the collimating reflector, and is used to reflect the reflected light of the collimating reflector at different diffraction angles; The focusing reflector is used to focus the reflected light of the grating at different spatial positions; The infrared single-point detector is connected to the linear motor and is used to move under the drive of the linear motor. The movement trajectory covers the focus position of the grating reflected light, thereby measuring the light intensity at different spatial positions and further measuring the light spectrum to be measured.

2. The spectrum analyzer based on infrared single point detector as claimed in claim 1, characterized in that: The slit is arranged on the bottom wall of the housing or the side wall of the housing.

3. The spectrum analyzer based on infrared single point detector as claimed in claim 1, characterized in that: The linear motor is controlled by a controller.

4. The spectrum analyzer based on infrared single point detector as claimed in claim 3, characterized in that: The controller adopts a single chip microcomputer controller.

5. The spectrum analyzer based on infrared single point detector as claimed in claim 1, characterized in that: The spectrum analyzer adopts a cross CT type optical path.

6. The spectrum analyzer based on infrared single point detector as claimed in claim 1, characterized in that: The spectrum analyzer adopts an M-type optical path.

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