LVF spectrometer

Abstract

The utility model relates to the technical field of spectrometers, and discloses an LVF spectrometer, which comprises a first mounting plate, a first push-broom driving device and a second push-broom driving device, and is characterized in that a light receiving element, a long-wave-pass gradual filter, a short-wave-pass gradual filter, an optical slit sheet and a detector are sequentially arranged on the first mounting plate along the light transmission direction; the first push-broom driving device is used for driving the long-wave-pass gradual filter to move back and forth; the second push-broom driving device is used for driving the short-wave-pass gradual filter to move back and forth; in actual use, the first push-broom driving device is arranged to drive the long-wave-pass gradual filter to move back and forth, and the second push-broom driving device is arranged to drive the short-wave-pass gradual filter to move. Therefore, when spectrum acquisition is carried out, the long-wave-pass gradual filter and the short-wave-pass gradual filter are moved to different positions to realize spectrum acquisition of different central wavelengths and different bandwidths.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of spectrometer, specifically relates to a LVF spectrometer. BACKGROUND

[0002] The LVF spectrometer, namely a linear variable filter spectrometer, is a spectrometer adopting linear variable filter (LVF) spectroscopy technology, and is widely applied in the fields of food analysis, oil analysis, energy industry and agriculture.

[0003] In actual work, when light emitted by an external light source passes through a sample chamber and is incident on a gradual variable filter of the LVF spectrometer, the gradual variable filter gradually changes the wavelength from one end to the other end, and transmits light of different wavelengths at different positions, thereby replacing a grating to perform spectroscopy. The light transmitted through the gradual variable filter is received by a linear array detector, and the corresponding pixels correspond to a specific wavelength.

[0004] For the existing LVF spectrometer, the position of the gradual variable filter is fixed and unchanged in actual use, so it cannot realize spectrum acquisition of different bandwidths, and the application range is limited. UTILITY MODEL CONTENT

[0005] In view of the deficiencies in the background art, the utility model provides a LVF spectrometer, and the technical problem to be solved is that the existing LVF spectrometer cannot realize spectrum acquisition of different bandwidths.

[0006] To solve the above technical problems, the utility model provides the following technical scheme: a LVF spectrometer, comprising:

[0007] A first mounting plate, which is provided with, in sequence along an optical transmission direction, a light receiving element, a long-wave pass gradual variable filter, a short-wave pass gradual variable filter, an optical slit plate and a detector;

[0008] A first push-broom driving device installed on the first mounting plate and used to drive the long-wave pass gradual variable filter to move back and forth;

[0009] A second push-broom driving device installed on the first mounting plate and used to drive the short-wave pass gradual variable filter to move back and forth;

[0010] The movement direction of the long-wave pass gradual variable filter and the movement direction of the short-wave pass gradual variable filter are both perpendicular to the optical transmission direction.

[0011] In certain embodiments, the first mounting plate is L-shaped, and the light receiving element is installed on the outer side surface of the vertical part of the first mounting plate;

[0012] The first push-broom driving device, the second push-broom driving device, the optical slit plate and the detector are installed on the top surface of the horizontal part of the first mounting plate.

[0013] In some embodiments, a base is mounted on the top surface of the horizontal part of the first mounting plate, the optical slit plate and the detector are mounted on the top surface of the base, and the first push-broom driving device and the second push-broom driving device are between the base and the vertical part of the first mounting plate.

[0014] In some embodiments, the detector is a single-point detector.

[0015] In some embodiments, the first push-broom driving device comprises a first driving motor, a second mounting plate, a first driving base, and a first driving lead screw.

[0016] The bottom surface of the second mounting plate is provided with two first linear guides, and the first driving base is movably mounted on the two first linear guides. The long-wave pass gradient filter is mounted on the top surface of the first driving base.

[0017] The first driving motor is mounted on the second mounting plate, the rotating end of the first driving motor is connected with the first driving lead screw, and the first driving lead screw is screwed with the first driving base.

[0018] In some embodiments, the second mounting plate is L-shaped, the first driving motor is mounted on the outer side surface of the vertical part of the second mounting plate, and the two first linear guides are mounted on the top surface of the horizontal part of the second mounting plate.

[0019] In some embodiments, a first limit sensor is mounted on the vertical part of the second mounting plate, a first scale is provided on the first driving base, and a first scale line displaying the position of the first scale is provided on the horizontal part of the second mounting plate.

[0020] In some embodiments, the second push-broom driving device comprises a second driving motor, a third mounting plate, a second driving base, and a second driving lead screw.

[0021] The bottom surface of the third mounting plate is provided with two second linear guides, and the second driving base is movably mounted on the two second linear guides. The short-wave pass gradient filter is mounted on the top surface of the second driving base.

[0022] The second driving motor is mounted on the third mounting plate, the rotating end of the second driving motor is connected with the second driving lead screw, and the second driving lead screw is screwed with the second driving base.

[0023] In some embodiments, the third mounting plate is L-shaped, the second driving motor is mounted on the outer side surface of the vertical part of the third mounting plate, and the two second linear guides are mounted on the top surface of the horizontal part of the third mounting plate.

[0024] In some embodiments, a second limit sensor is mounted on the vertical part of the third mounting plate; a second scale is arranged on the second driving base, and a second scale line for displaying the position of the second scale is arranged on the horizontal part of the third mounting plate.

[0025] The utility model discloses the beneficial effect compared with prior art is: the utility model discloses through setting up first push scan drive arrangement and drive long wave pass gradual change filter piece to and fro movement, through setting up second push scan drive arrangement and drive short wave pass gradual change filter piece movement, like this when carrying out spectrum collection, through making long wave pass gradual change filter piece and short wave pass gradual change filter piece move to different position to realize the spectrum collection of different center wavelength and different bandwidth. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structural schematic diagram of the utility model in the first view direction of example;

[0027] Figure 2 It is the structural schematic diagram of the utility model in the second view direction of example;

[0028] Figure 3 It is the connection schematic diagram of first push scan drive arrangement and long wave pass gradual change filter piece in the example;

[0029] Figure 4 It is the connection schematic diagram of second push scan drive arrangement and short wave pass gradual change filter piece in the example. DETAILED DESCRIPTION

[0030] The following is to illustrate the embodiment of the LVF spectrometer disclosed by the specific embodiment, and the person skilled in the art can understand the advantages and effects of the present application from the disclosure of the specification. The present application can be implemented or applied by other different specific embodiments, and each detail in the specification can be modified and changed based on different viewpoints and applications without departing from the concept of the present application. In addition, the drawings of the present application are only simple schematic illustrations, not the actual size description, and the prior declaration. The following embodiments will further illustrate the related technical content of the present application, but the disclosed content is not used to limit the protection scope of the present application.

[0031] It should be understood that although the terms first, second, third, etc. may be used herein to describe various components or features, these components or features should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one feature from another feature. In addition, the term or used herein may include any one or a combination of associated listed items.

[0032] As Figures 1-2As shown, a LVF spectrometer comprises:

[0033] A first mounting plate 1, on which a light receiving element 2, a long wave pass variable filter 3, a short wave pass variable filter 4, an optical slit 5 and a detector 6 are sequentially arranged along a light transmission direction;

[0034] A first push-scan driving device 8 is mounted on the first mounting plate 1 and used to drive the long wave pass variable filter 3 to move back and forth;

[0035] A second push-scan driving device 9 is mounted on the first mounting plate 1 and used to drive the short wave pass variable filter 4 to move back and forth;

[0036] The moving direction of the long wave pass variable filter 3 and the moving direction of the short wave pass variable filter 4 are both perpendicular to the light transmission direction.

[0037] In actual spectrum collection, the first push-scan driving device 8 and the second push-scan driving device 9 synchronously drive the long wave pass variable filter 3 and the short wave pass variable filter 4 to move, and when the light receiving element 1 passes through the short wave pass variable filter 4 and the long wave pass variable filter 3 at different positions at the same time, the light is cut off from the long wave and from the short wave in sequence, and the twice cut-off forms a band pass;

[0038] When the center wavelength gradient rates of the short wave pass variable filter 4 and the long wave pass variable filter 3 are consistent:

[0039] When the center wavelength of the short wave pass variable filter 4 moves towards the long wave and the center wavelength of the long wave pass variable filter 3 moves towards the short wave, the band pass center wavelength is unchanged and the band width is widened;

[0040] When the center wavelength of the short wave pass variable filter 4 moves towards the short wave and the center wavelength of the long wave pass variable filter 3 moves towards the long wave, the band pass center wavelength is unchanged and the band width is narrowed;

[0041] When the short wave pass variable filter 4 and the long wave pass variable filter 3 simultaneously move towards the long wave, the band pass center wavelength is enlarged and the band width is unchanged;

[0042] When the short wave pass variable filter 4 and the long wave pass variable filter 3 simultaneously move towards the short wave, the band pass center wavelength is reduced and the band width is unchanged;

[0043] Therefore, the two-dimensional sweep frequency of the center wavelength and the band width of the spectrometer can be realized by reasonably utilizing the mutual movement of the four short wave pass variable filters 4 and the long wave pass variable filters 3, so that the spectrum collection of different band widths is realized.

[0044] Specifically, in the embodiment, the first mounting plate 1 is in L shape, and the light receiving element 2 is mounted on the outer side surface of the vertical part of the first mounting plate 1;

[0045] The first push scan driving device 8, the second push scan driving device 9, the optical slit plate 5 and the detector 6 are mounted on the top surface of the horizontal part of the first mounting plate 1.

[0046] Specifically, in the embodiment, the base 7 is mounted on the top surface of the horizontal part of the first mounting plate 1 away from the light receiving element 2, the optical slit plate 5 and the detector 6 are mounted on the top surface of the base 7, and the first push scan driving device 8 and the second push scan driving device 9 are between the base 7 and the vertical part of the first mounting plate 1.

[0047] Specifically, in the embodiment, the detector 6 is a single-point detector.

[0048] As shown in Figure 3 , in the embodiment, the first push scan driving device 8 comprises a first driving motor 81, a second mounting plate 80, a first driving base 83 and a first driving lead screw 82.

[0049] The bottom surface of the second mounting plate 80 is provided with two first linear guides 84, and the first driving base 83 is movably mounted on the two first linear guides 84. The long-wave pass variable filter 3 is mounted on the top surface of the first driving base 83.

[0050] The first driving motor 81 is mounted on the second mounting plate 80, the rotating end of the first driving motor 81 is connected with the first driving lead screw 82, and the first driving lead screw 82 is screwed with the first driving base 83.

[0051] In actual use, when the first driving motor 81 rotates, it drives the first driving lead screw 82 to rotate, so as to drive the first driving base 83 to move on the first linear guide 84, thereby adjusting the position of the long-wave pass variable filter 3. In addition, in order to accurately control the position of the long-wave pass variable filter 3, the first driving motor 81 can be a step motor or a servo motor.

[0052] Specifically, in the embodiment, the second mounting plate 80 is L-shaped, the first driving motor 81 is mounted on the outer side surface of the vertical part of the second mounting plate 80, and the two first linear guides 84 are mounted on the top surface of the horizontal part of the second mounting plate 80.

[0053] In addition, in the embodiment, the first limit sensor 85 is mounted on the vertical part of the second mounting plate 80; the first scale 86 is arranged on the first driving base 83, and the first scale line 87 for displaying the position of the first scale 86 is arranged on the horizontal part of the second mounting plate 80.

[0054] In actual use, the position of the first driving base 83 can be limited by the first limit sensor 85 to avoid collision.

[0055] Specifically, in the embodiment, the second push scanning driving device 9 comprises a second driving motor 91, a third mounting plate 90, a second driving base 93 and a second driving screw 92.

[0056] The bottom surface of the third mounting plate 90 is provided with two second linear guides 94, and the second driving base 93 is movably mounted on the two second linear guides 94, and the short-wave-pass gradual filter 4 is mounted on the top surface of the second driving base 93.

[0057] The second driving motor 91 is mounted on the third mounting plate 93, the rotating end of the second driving motor 91 is connected with the second driving screw 92, and the second driving screw 92 is screwed with the second driving base 93.

[0058] In actual use, when the second driving motor 91 rotates, the second driving motor 91 drives the second driving screw 92 to rotate, so as to drive the second driving base 93 to move on the second linear guides 94, thereby adjusting the position of the short-wave-pass gradual filter 4. In addition, in order to accurately control the position of the short-wave-pass gradual filter 4, the second driving motor 91 can be a stepping motor or a servo motor.

[0059] In the embodiment, the third mounting plate 90 is in the shape of L, the second driving motor 91 is mounted on the outer side surface of the vertical part of the third mounting plate 90, and the two second linear guides 94 are mounted on the top surface of the horizontal part of the third mounting plate 90.

[0060] In addition, the vertical part of the third mounting plate 90 is provided with a second limit sensor 95, the second driving base 93 is provided with a second scale 96, and the horizontal part of the third mounting plate 90 is provided with a second scale line 97 for displaying the position of the second scale 96.

[0061] In actual use, the position of the second driving base 93 can be limited by the second limit sensor 95, so as to avoid the collision between the second driving base 93 and the horizontal part of the third mounting plate 90.

[0062] According to the above description, the related personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. An LVF spectrometer characterized in that, The application relates to a push-broom type hyperspectral imager. The first mounting plate (1) is provided with, in sequence along an optical transmission direction, a light receiving element (2), a long-wave pass gradient filter (3), a short-wave pass gradient filter (4), an optical slit plate (5) and a detector (6); A first push-broom driving device (8) is installed on the first mounting plate (1) and used for driving the long-wave pass gradient filter (3) to move back and forth; A second push-broom driving device (9) is installed on the first mounting plate (1) and used for driving the short-wave pass gradient filter (4) to move back and forth; The moving direction of the long-wave pass gradient filter (3) and the moving direction of the short-wave pass gradient filter (4) are both perpendicular to the optical transmission direction.

2. The LVF spectrometer according to claim 1, characterized in that The first mounting plate (1) is L-shaped, and the light receiving element (2) is installed on the outer side of the vertical part of the first mounting plate (1); The first push-broom driving device (8), the second push-broom driving device (9), the optical slit plate (5) and the detector (6) are installed on the top surface of the horizontal part of the first mounting plate (1).

3. The LVF spectrometer according to claim 2, characterized in that The top surface of the horizontal part of the first mounting plate (1) is provided with a base (7) on the side away from the light receiving element (2), the optical slit plate (5) and the detector (6) are installed on the top surface of the base (7), and the first push-broom driving device (8) and the second push-broom driving device (9) are between the base (7) and the vertical part of the first mounting plate (1).

4. The LVF spectrometer according to claim 1, characterized in that The detector (6) is a single-point detector.

5. The LVF spectrometer according to claim 1, wherein The first push-broom driving device (8) comprises a first driving motor (81), a second mounting plate (80), a first driving base (83) and a first driving screw rod (82); The bottom surface of the second mounting plate (80) is provided with two first linear guides (84), the first driving base (83) is movably installed on the two first linear guides (84), and the long-wave pass gradient filter (3) is installed on the top surface of the first driving base (83); The first driving motor (81) is installed on the second mounting plate (80), the rotating end of the first driving motor (81) is connected with the first driving screw rod (82), and the first driving screw rod (82) is screwed with the first driving base (83).

6. The LVF spectrometer according to claim 5, characterized in that The second mounting plate (80) is L-shaped, the first driving motor (81) is installed on the outer side of the vertical part of the second mounting plate (80), and the two first linear guides (84) are installed on the top surface of the horizontal part of the second mounting plate (80).

7. The LVF spectrometer according to claim 6, characterized in that A first limit sensor (85) is installed on the vertical part of the second mounting plate (80), a first scale (86) is arranged on the first driving base (83), and a first scale line (87) for displaying the position of the first scale (86) is arranged on the horizontal part of the second mounting plate (80).

8. The LVF spectrometer according to claim 1, characterized in that The second push-broom driving device (9) comprises a second driving motor (91), a third mounting plate (90), a second driving base (93) and a second driving screw rod (92). The bottom surface of the third mounting plate (90) is provided with two second linear guides (94), and the second driving base (93) is movably mounted on the two second linear guides (94), and the short-wave passing gradual filter (4) is mounted on the top surface of the second driving base (93); The second driving motor (91) is mounted on the third mounting plate (90), and the rotating end of the second driving motor (91) is connected with the second driving screw (92), and the second driving screw (92) is screwed with the second driving base (93).

9. The LVF spectrometer according to claim 8, characterized in that The third mounting plate (90) is L-shaped, the second driving motor (91) is mounted on the outer side surface of the vertical part of the third mounting plate (90), and the two second linear guides (94) are mounted on the top surface of the horizontal part of the third mounting plate (90).

10. The LVF spectrometer according to claim 9, characterized in that The vertical part of the third mounting plate (90) is provided with a second limit sensor (95), the second driving base (93) is provided with a second scale (96), and the horizontal part of the third mounting plate (90) is provided with a second scale line (97) for displaying the position of the second scale (96).

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