Imaging spectrometer monochromator convenient to install and adjust

Abstract

The utility model discloses an imaging spectrometer monochromator convenient to install and adjust, which relates to the technical field of optical instruments and comprises a fixed bottom plate, and an entrance slit group, a collimation imaging light path group, a grating group, a focusing imaging light path group and a detector assembly which are fixed on the fixed bottom plate and are sequentially distributed on a light path, the entrance slit group is connected to the fixed bottom plate through the slit adjusting plate; the collimation imaging light path group and the focusing imaging light path group are arranged on the fixed bottom plate through the support adjusting assembly; the grating group is connected to the fixed bottom plate through a grating adjusting plate; and each component can be finely adjusted. The assembling and adjusting operation is simpler, more convenient and faster, and the consistency, the reliability and the production efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical instrument technical field, in particular to an imaging spectrometer monochromator convenient to assemble and adjust. BACKGROUND

[0002] Water quality on-line monitoring can know water environment quality change in time, can obtain the content and distribution state of some greater harmful pollutant fast, is the important prerequisite of water pollution prevention and treatment. Hyperspectral imaging technology is a kind of continuous measuring equipment that can be applied to the automatic monitoring of the composition of some pollutants in water. Hyperspectral technology uses the molecular spectral absorption of water to quantitatively identify the composition therein, and the spectral image data cube obtained has the characteristics of high spectral resolution, integration of graph and spectrum, multiple spectral bands and continuous imaging. The evaluation and measurement of the pollutant content reflected by the spectrum, the determination of the ratio of the composition in a spatial unit of spectral mixture, the description of the spatial distribution of various pollutants, the change of various pollutants through periodic data monitoring and other application fields play an increasingly important role.

[0003] Hyperspectral instrument is a complex and precise optical instrument, and the core component of the hyperspectral instrument is an imaging spectrometer monochromator. The existing imaging spectrometer monochromator needs to use an interferometer, a compensating mirror and a complex tool structure for assembly and adjustment, and the process is complex. It requires experienced scientific researchers to adjust and realize, and the working period is long. It is not suitable for civilian factory production. The assembly of civilian optical instruments seeks simple steps, easy-to-learn operation and convenient batch production. The existing assembly and adjustment method has problems such as great assembly and adjustment difficulty, inconvenient installation of functional parts and poor consistency of instrument indicators for workers, increases worker working hours, affects batch production and has low production efficiency. UTILITY MODEL CONTENT

[0004] The utility model aims at providing an imaging spectrometer monochromator convenient to assemble and adjust to solve the problems existing in the prior art, make the assembly and adjustment operation simpler and more convenient, and more rapid, improve consistency, reliability and production efficiency.

[0005] To achieve the above object, the utility model provides the following scheme.

[0006] The utility model provides a kind of imaging spectrometer monochromator of convenient installation and adjustment, including fixed base plate and be fixed on the fixed base plate and distribute sequentially on the light path on incident slit group, collimation imaging light path group, grating group, focusing imaging light path group and detector assembly;The incident slit group is connected on the fixed base plate by slit adjusting plate;The slit adjusting plate has first through hole, and the incident slit group is worn in the first through hole;Multiple first through holes are arranged in the circumferential direction of the first through hole, and the position of the incident slit group corresponding each first through hole is provided with first threaded hole, first bolt is worn in the first through hole, and the threaded end of the first bolt is connected with the first threaded hole, and multiple first gaskets are clamped between the first through hole and the first threaded hole;The collimation imaging light path group and the focusing imaging light path group are both set on the fixed base plate by support adjusting assembly;The support adjusting assembly includes main support plate and support base plate;The main support plate is fixedly arranged on the support base plate;Second through hole is opened in the main support plate, and adapter flange is fixedly arranged on the main support plate, and the adapter flange has internal thread hole;The lens of collimation imaging light path group or focusing imaging light path group is worn in the second through hole and is connected with the internal thread hole of adapter flange by thread;Multiple second through holes are arranged on the lower end of the support base plate, and the position of each second through hole on the fixed base plate is provided with second threaded hole, second bolt is worn in the second through hole, and the threaded end of the second bolt is connected with the second threaded hole, and multiple second gaskets are clamped between the second through hole and the second threaded hole;The grating group is connected on the fixed base plate by grating adjusting plate;The lower end of the grating adjusting plate has multiple third through holes, and the position of each third through hole on the fixed base plate is provided with third threaded hole, third bolt is worn in the third through hole, and the threaded end of the third bolt is connected with the third threaded hole, and multiple third gaskets are clamped between the third through hole and the third threaded hole.

[0007] Preferably, the support adjusting assembly further includes an auxiliary support plate, the auxiliary support plate is arranged in parallel with the main support plate, the lower end of the auxiliary support plate is fixedly arranged on the support base plate, a fourth through hole is opened in the auxiliary support plate, the lens of collimation imaging light path group or focusing imaging light path group is worn in the fourth through hole, support threaded holes are opened in each side wall of the auxiliary support plate and communicated with the fourth through hole, support bolts are threadedly connected in the support threaded holes, and the threaded end of the support bolt can abut on the outer side wall of the lens of collimation imaging light path group or focusing imaging light path group.

[0008] Preferably, the lower end of the slit adjusting plate has a plurality of fourth through holes, the fixing base plate is provided with a plurality of fourth threaded holes corresponding to each of the fourth through holes, fourth bolts are arranged in the fourth through holes, and threaded ends of the fourth bolts are screwed into the fourth threaded holes.

[0009] Preferably, a support threaded hole is arranged on the bottom side wall of the auxiliary support plate, and support adjusting through holes are arranged on the support base plate and the fixing base plate corresponding to the support threaded hole.

[0010] Preferably, when the grating group is a fixed grating, the detector assembly is a wide area array detector; when the grating group is a rotating grating, the detector assembly is a narrow area array detector, and an exit slit group is further arranged on the light path.

[0011] Preferably, the incident slit group comprises a slit seat, a slit fixing ring plate and a slit unit; the slit seat is arranged in the first through hole, the slit seat has a resting groove and a resting through hole in communication with the resting groove, and the inner diameter of the resting through hole is smaller than the inner diameter of the resting groove; the slit unit has an incident slit; the inner diameter of the slit unit is greater than the inner diameter of the resting through hole and smaller than the inner diameter of the resting groove; the slit unit is arranged in the resting groove, and the slit fixing ring plate is arranged on the side of the slit unit away from the resting through hole.

[0012] Preferably, the straightness of the collimating imaging light path group and the focusing imaging light path group is less than or equal to 0.05 mm; the adjustment range of the pitch angle thereof is ±0.5 deg; and the adjustment range of the azimuth angle thereof is ±0.5 deg.

[0013] Preferably, the straightness adjustment range of the grating group is ±3 mm; the adjustment range of the pitch angle thereof is ±0.2 deg; and the adjustment range of the azimuth angle thereof is ±0.2 deg.

[0014] Preferably, the incident slit is parallel to the grating lines on the grating group.

[0015] Preferably, the positions of the first through holes of the slit adjusting plate, the positions of the fourth through holes of the slit adjusting plate, the positions of the second through holes of the support base plate and the positions of the third through holes of the grating adjusting plate are fixedly provided with bosses.

[0016] Compared with the prior art, the utility model discloses the following technical effects:

[0017] The monochromator of the imaging spectrometer convenient to assemble and adjust is characterized in that: the incident slit group receives the real image of the target to be measured by the pre-telescope, the collimating imaging light path group collimates the incident slit light of the incident slit group into parallel light beams, the parallel light beams are incident on the grating surface of the grating group, the focusing imaging light path group receives the parallel light beams diffracted by the grating group, and the parallel light beams are imaged on the light-sensitive surface of the detector assembly; each part is fixed on the fixed bottom plate, and the fixed bottom plate is set as a reference; the first gasket that can be increased or decreased is arranged between the slit adjusting plate and the first through hole, the pitch angle and the azimuth angle of the incident slit group can be adjusted, and the angle of the incident light beam is adjusted conveniently; the collimating imaging light path group and the focusing imaging light path group are provided with an adjustable structure, the axial adjustment (that is, the structure of the adapter flange and the threaded connection) and the pitch angle and the azimuth angle adjustment of each part in the optical axis direction can be realized; similarly, the grating group can also be adjusted correspondingly; the incident slit group is fixed by using the laser to align the incident slit group, the diffraction spot array generated by the laser is parallel to the vertical reference datum, and the incident slit group is fixed; the collimating imaging light path group is initially assembled on the fixed bottom plate, the parallel light tube is aligned with the lens of the collimating imaging light path group, the crosshair in the parallel light tube is observed at the incident slit group, and the collimating imaging light path group is adjusted as a whole; the grating group is installed on the fixed bottom plate, the fixed bottom plate is used as a reference datum for fixing, the incident slit group is illuminated by using a white light source, whether the grating diffraction image is horizontal is observed by using a receiving screen, the position of the grating group is adjusted and fixed through fine adjustment; the focusing imaging light path group is initially assembled on the fixed bottom plate, and the detector assembly is installed at the lens interface position, so that the attitude of the two parts can be adjusted online; the low-pressure mercury lamp is placed at the incident slit group, the focusing imaging light path group is adjusted as a whole until the discrete spectrum is imaged clearly, and then the focusing imaging light path group is fixed; the above can realize the coarse adjustment of each component; the low-pressure mercury lamp 546.07nm spectrum line is used for further fine adjustment, the spectrum image is observed, and the collimating imaging light path group and the focusing imaging light path group are adjusted until the spectrum bandwidth meets the instrument requirement; for workers, the overall adjustment is simpler and more convenient, the required professional nature is lower, the assembly and adjustment are faster, and the consistency, reliability and production efficiency are improved.

[0018] Further, the auxiliary support plates are arranged in parallel with the main support plate, and jointly provide support for the lens, so that the collimating imaging light path group or the focusing imaging light path group is more stable in installation.

[0019] Further, the plurality of bolt connection points cooperate with the gasket to reserve a certain fine adjustment space for the slit adjusting plate, and the fine adjustment connection of the incident slit group and the slit adjusting plate makes the fine adjustment of the incident slit group more accurate. Further, a support threaded hole is arranged on the bottom side wall of the auxiliary support plate, and is matched with the corresponding support adjusting through holes on the support bottom plate and the fixed bottom plate, so as to provide a direct and convenient adjustment channel for the assembly and adjustment personnel, and make the support fixing at the support threaded hole of the bottom of the auxiliary support plate simpler, more convenient and faster.

[0020] Further, the optical path of the fixed grating is relatively fixed and simple, the wide area array detector can receive a larger range of spectral information at one time, the characteristics of the outgoing light of the fixed grating are fully utilized, information omission is avoided, the spatial resolution of spectral imaging is improved to the greatest extent, a large area of the detection area can completely cover the spectral band after the grating dispersion, so that the final imaging spectral graph is more complete and clear, and data collection is more comprehensive; for the rotating grating, it continuously changes the diffraction angle to scan the spectral range, and the narrow array detector is just right. Due to the dynamic change of the outgoing light angle and position at different times in the rotation process, the narrow array detector can quickly and accurately focus on the specific small range of spectral region dispersed by the grating at the current time with a small detection area, realize high time resolution detection, track the rapidly changing spectral information, reduce the interference and blur caused by too large detection range, and improve the accuracy of data; it can be selected and set according to the cost and other needs.

[0021] Further, the structure of the slit seat is cleverly designed, the difference between the inner diameter of the resting groove and the resting through hole creates a precise installation position for the slit unit, the inner diameter of the slit unit is between the two, so that it can be embedded in the resting groove, just like a customized card slot, realizing the quick positioning of the slit unit in the slit seat. Without complex debugging, the accuracy of the installation position can be ensured, the assembly and adjustment time and labor cost are effectively reduced, and the assembly efficiency is improved; the slit unit is fixed by the slit fixing ring plate, and the placement attitude of the incident slit can be conveniently adjusted and fixed.

[0022] Further, the clear adjustment range setting makes it easier for the assembly and adjustment personnel to operate, when assembling the monochromator of the imaging spectrometer, it is not necessary to spend a lot of time to explore how to adjust the light path attitude, as long as the pitch angle and azimuth angle are adjusted within the specified ±0.5deg range, and the high precision requirement of straightness is met, the light path group calibration can be quickly completed, the assembly and adjustment difficulty is reduced, the assembly cycle is shortened, and the production efficiency is improved.

[0023] Further, the clear adjustment range provides clear guidance for the assembly and adjustment personnel, and reduces the assembly and adjustment difficulty. Compared with the case without standard adjustment range and relying entirely on experience to explore, the operator can quickly and efficiently complete the calibration work by adjusting the straightness, pitch angle and azimuth angle of the grating group according to the set range, greatly shortening the assembly cycle of the instrument, improving the production efficiency, and reducing the product quality problems caused by assembly and adjustment errors.

[0024] Furthermore, when the entrance slit is parallel to the grating lines, the light entering the grating through the slit can diffract more regularly and orderly on the grating surface. This avoids the additional optical path difference and light scattering problems caused by angular deviations, allowing different wavelengths of light to be separated more accurately during the dispersion process. This significantly improves the spectrometer's ability to distinguish different wavelengths of light, thereby obtaining higher resolution spectral images and enabling the complete presentation of detailed information in the spectral data.

[0025] Furthermore, the boss structure ensures the strength of the connection, and the boss structure is easier to identify and operate. Workers can use the boss to quickly locate key connection points, reduce assembly and adjustment time, and improve assembly and adjustment efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the overall structure of the monochromator of the imaging spectrometer, which is easy to assemble and adjust, provided by this utility model;

[0028] Figure 2 A structural diagram of the incident slit assembly in the monochromator of the imaging spectrometer, which is easy to assemble and adjust according to this utility model.

[0029] Figure 3 Axonometric view of the connection structure between the lens and the support and adjustment assembly of the collimating imaging optical path group or the focusing imaging optical path group in the monochromator of the imaging spectrometer provided by this utility model for easy assembly and adjustment;

[0030] Figure 4 for Figure 3 Side view;

[0031] Figure 5 for Figure 3 A bottom view;

[0032] Figure 6 A schematic diagram of the grating assembly in the monochromator of the imaging spectrometer, which is easy to assemble and adjust according to this utility model;

[0033] Figure 7 A schematic diagram of the fixed base plate in the monochromator of the imaging spectrometer, which is easy to assemble and adjust according to this utility model.

[0034] In the picture:

[0035] 10-fixed bottom plate; 11-second threaded hole; 12-third threaded hole; 13-fourth threaded hole;

[0036] 20-incoming slit group; 21-slit adjusting plate; 211-first through hole; 212-first through hole; 213-fourth through hole; 22-slit seat; 221-first threaded hole; 23-slit fixing ring plate 24-slit unit;

[0037] 30-collimating imaging light path group; 31-main support plate; 32-assistant support plate; 321-support threaded hole; 33-support bottom plate; 331-second through hole; 34-adapting flange;

[0038] 40-grating group; 41-grating adjusting plate; 411-third through hole; 42-grating element; 43-grating seat;

[0039] 50-focusing imaging light path group;

[0040] 60-detector assembly. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0042] The present application aims to provide an imaging spectrometer monochromator convenient to assemble and adjust, so as to solve the problems in the prior art, make the assembly and adjustment operation simpler and more convenient, and faster, and improve consistency, reliability and production efficiency.

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0044] Embodiment one

[0045] The present embodiment provides an imaging spectrometer monochromator convenient to assemble and adjust, such as Figures 1-7As shown, it comprises a fixed base plate 10, and an incident slit group 20, a collimating imaging light path group 30, a grating group 40, a focusing imaging light path group 50 and a detector assembly 60 fixed on the fixed base plate 10 and distributed in the light path in turn; the incident slit group 20 is connected to the fixed base plate 10 through a slit adjusting plate 21; the slit adjusting plate 21 has a first through hole 211, and the incident slit group 20 is arranged in the first through hole 211; a plurality of first through holes 212 are arranged in the circumferential direction of the first through hole 211, and the incident slit group 20 is provided with a first threaded hole 221 corresponding to the position of each first through hole 212, a first bolt is arranged in the first through hole 212, the threaded end of the first bolt is threadedly connected with the first threaded hole 221, and a plurality of first gaskets are arranged between the first through hole 212 and the first threaded hole 221; the collimating imaging light path group 30 and the focusing imaging light path group 50 are arranged on the fixed base plate 10 through a support adjusting assembly; the support adjusting assembly comprises a main support plate 31 and a support base plate 33; the main support plate 31 is fixedly arranged on the support base plate 33; a second through hole is formed in the main support plate 31, and an adapter flange 34 is fixedly arranged on the main support plate 31, and the adapter flange 34 has an internal threaded hole; the lens of the collimating imaging light path group 30 or the focusing imaging light path group 50 is arranged in the second through hole and is threadedly connected with the internal threaded hole of the adapter flange 34; the lower end of the support base plate 33 is provided with a plurality of second through holes 331, and the fixed base plate 10 is provided with a second threaded hole 11 corresponding to the position of each second through hole 331; a second bolt is arranged in the second through hole 331, the threaded end of the second bolt is threadedly connected with the second threaded hole 11, and a plurality of second gaskets are arranged between the second through hole 331 and the second threaded hole 11; the grating group 40 is connected to the fixed base plate 10 through a grating adjusting plate 41; the lower end of the grating adjusting plate 41 has a plurality of third through holes 411, and the fixed base plate 10 is provided with a third threaded hole 12 corresponding to the position of each third through hole 411; a third bolt is arranged in the third through hole 411, the threaded end of the third bolt is threadedly connected with the third threaded hole 12, and a plurality of third gaskets are arranged between the third through hole 411 and the third threaded hole 12.

[0046] The incident slit group 20 receives the real image of the target to be measured by the pre-telescope, the collimated imaging light path group 30 collimates the incident slit light of the incident slit group 20 into parallel light beams, the grating group 40 diffracts the parallel light beams, the focusing imaging light path group 50 receives the diffracted parallel light beams, and the light-sensitive surface of the detector assembly 60 is imaged; each part is uniformly fixed on the fixed base plate 10, and the reference is set on the fixed base plate 10; the first gasket can be added or removed through the cooperation of the slit adjusting plate 21 and the plurality of first through holes 212, so that the pitch angle and the azimuth angle of the incident slit group 20 can be adjusted, and the angle of the incident light beam can be adjusted; through the adjustable structure of the collimated imaging light path group 30 and the focusing imaging light path group 50, the axial adjustment (i.e. the structure of the adapter flange 34 and the threaded connection thereof) and the pitch angle and the azimuth angle of each can be adjusted; similarly, the grating group 40 can also be adjusted correspondingly; the incident slit group 20 is aligned with the laser, and the diffracted spot array generated thereby is parallel to the vertical reference datum, so that the incident slit group 20 can be fixed (using a laser, aligning the incident slit to generate a diffracted spot array, adjusting the position of the incident slit in the slit seat 22, so that the diffracted spot array is parallel to the vertical reference datum, and the slit unit 24 can be pressed and fixed by the slit fixing ring plate 23); the collimated imaging light path group 30 is initially installed on the fixed base plate 10, a collimator tube is aligned with the lens of the collimated imaging light path group 30, the crosshair in the collimator tube is observed at the incident slit group 20, and the collimated imaging light path group 30 is adjusted as a whole; the grating group 40 is installed on the fixed base plate 10, and the fixed base plate 10 is used as a reference datum for fixation, a white light source is used to illuminate at the incident slit group 20, and whether the grating diffraction image is horizontal is observed by using a receiving screen, and the position of the grating group 40 is adjusted and fixed; the focusing imaging light path group 50 is initially installed on the fixed base plate 10, and the detector assembly 60 is installed at the lens interface position at the same time, so that the attitude of the two parts can be adjusted online; a low-pressure mercury lamp is placed at the incident slit group 20, the focusing imaging light path group 50 is adjusted as a whole until the discrete spectrum is clear, and then fixed, and the above can realize the coarse adjustment of each component; further fine adjustment is performed by using the 546.07nm spectral line of the low-pressure mercury lamp 546.07nm, the spectrum image is observed, the collimated imaging light path group 30 and the focusing imaging light path group 50 are adjusted at the same time, and the spectrum bandwidth meets the instrument requirements, which is convenient for workers to adjust as a whole, requires lower professionalism, is faster to assemble and adjust, and improves consistency, reliability and production efficiency.

[0047] Specifically, the imaging spectrometer monochromator of the embodiment is easy to assemble and disassemble, and high-precision imaging spectrometer monochromator assembly and disassembly can be completed with fewer tools or tooling departments, thereby ensuring wavelength accuracy, wavelength range, spectral bandwidth, and the clarity of a planar image. In application detection, spectral resolution accuracy is closely related to the reliability of measurement results; good planar image imaging quality can distinguish the relative position relationship of a target planar object and detect a high-signal-to-noise ratio pixel data cube. The assembly and disassembly can be completed by using conventional instruments such as low-pressure mercury lamps, lasers, and collimating tubes, the assembly and disassembly steps are simple, the operation is easy to learn and convenient for batch production, the assembly and disassembly are simple and efficient, the working hours can be reduced, the assembly efficiency is improved, and the production cost of the product is greatly saved.

[0048] Specifically, the incident slit group 20, the collimating imaging light path group 30, the grating group 40, the focusing imaging light path group 50, and the detector assembly 60 sequentially distributed on the light path are all existing components, and will not be described in detail.

[0049] Among them, the related setting of the incident slit group 20 is as follows:

[0050] Specifically, the slit unit 24 of the incident slit group 20 is generally made of metal materials such as brass, alloy steel, aluminum, or glass materials, and has a rectangular or square shape.

[0051] Specifically, the parallelism of the two sides of the incident slit is at least 0.01 mm.

[0052] In the optional scheme of the embodiment, more preferably, as shown in Figure 1 and Figure 2 The incident slit group 20 includes a slit seat 22, a slit fixing ring plate 23, and a slit unit 24; the slit seat 22 is provided in the first through hole 211, the slit seat 22 has a resting groove and a resting through hole in communication with the resting groove, the inner diameter of the resting through hole is smaller than the inner diameter of the resting groove; the slit unit 24 has an incident slit; the inner diameter of the slit unit 24 is greater than the inner diameter of the resting through hole and smaller than the inner diameter of the resting groove; the slit unit 24 is arranged in the resting groove, and the side of the slit unit 24 away from the resting through hole is provided with the slit fixing ring plate 23. The structure of the slit seat 22 is ingenious, the difference between the inner diameters of the resting groove and the resting through hole creates a precise installation position for the slit unit 24, and the inner diameter of the slit unit 24 is between the two, so that it can be embedded in the resting groove, like a customized slot, achieving quick positioning of the slit unit 24 in the slit seat 22, without complex adjustment to ensure the accuracy of the installation position, effectively reducing the assembly and disassembly time and labor cost, and improving the assembly efficiency; the slit unit 24 is fixed by the slit fixing ring plate 23, which can conveniently adjust and fix the placement attitude of the incident slit.

[0053] In the optional scheme of the embodiment, more preferably, as shown inFigure 1 and Figure 2 As shown in FIG. 13, the lower end of the slit adjustment plate 21 has a plurality of fourth through holes 213, and the fixing base 10 is provided with a plurality of fourth threaded holes 13 at positions corresponding to the fourth through holes 213. Fourth bolts are arranged in the fourth through holes 213, and the threaded ends of the fourth bolts are screwed into the fourth threaded holes 13. A plurality of fourth gaskets are arranged between the fourth through holes 213 and the fourth threaded holes 13. The plurality of bolt connection points cooperate with the gaskets to reserve a certain fine adjustment space for the slit adjustment plate 21. The fine adjustment connection of the incident slit group 20 and the slit adjustment plate 21 makes the fine adjustment of the incident slit group 20 more accurate.

[0054] In the optional scheme of the present embodiment, it is more preferred that the incident slit is parallel to the grating lines on the grating group 40. When the incident slit is parallel to the grating lines, the light can be more regularly and orderly diffracted on the grating surface after entering the grating through the slit, which avoids the problems of additional optical path difference and light scattering caused by angle deviation, allows different wavelengths of light to be more accurately separated in the dispersion process, significantly improves the fine degree of resolution of different wavelengths of light by the spectrometer, thereby obtaining a higher resolution spectral image, and makes the detailed information in the spectral data fully presented.

[0055] Among them, the related setting of the collimating imaging light path group 30 and the focusing imaging light path group 50 is as follows:

[0056] In the optional scheme of the present embodiment, it is more preferred that the straightness of the collimating imaging light path group 30 and the focusing imaging light path group 50 is ≤0.05 mm; the adjustment range of the pitch angle thereof is ±0.5 deg (i.e. -0.5 deg~+0.5 deg, and the ranges mentioned at other positions are the same); and the adjustment range of the azimuth angle thereof is ±0.5 deg (i.e. -0.5 deg~+0.5 deg). The clear adjustment range setting makes it easier for the operator to operate, and when assembling the imaging spectrometer monochromator, the operator does not need to spend a lot of time to explore how to adjust the light path attitude. As long as the pitch angle and the azimuth angle are adjusted within the given ±0.5 deg range, and the high-precision requirement of the straightness is met, the calibration of the light path group can be quickly completed, the assembly and adjustment difficulty is reduced, the assembly cycle is shortened, and the production efficiency is improved.

[0057] In the optional scheme of the present embodiment, it is more preferred that the straightness of the collimating imaging light path group 30 and the focusing imaging light path group 50 is ≤0.05 mm; the adjustment range of the pitch angle thereof is ±0.5 deg (i.e. -0.5 deg~+0.5 deg, and the ranges mentioned at other positions are the same); and the adjustment range of the azimuth angle thereof is ±0.5 deg (i.e. -0.5 deg~+0.5 deg). The clear adjustment range setting makes it easier for the operator to operate, and when assembling the imaging spectrometer monochromator, the operator does not need to spend a lot of time to explore how to adjust the light path attitude. As long as the pitch angle and the azimuth angle are adjusted within the given ±0.5 deg range, and the high-precision requirement of the straightness is met, the calibration of the light path group can be quickly completed, the assembly and adjustment difficulty is reduced, the assembly cycle is shortened, and the production efficiency is improved. Figure 1 , Figure 3 and Figure 4As shown, the support adjusting assembly further comprises an auxiliary support plate 32; the auxiliary support plate 32 is arranged in parallel with the main support plate 31, and the lower end of the auxiliary support plate 32 is fixedly arranged on the support bottom plate 33; the auxiliary support plate 32 is provided with a fourth through hole, and the lens of the collimating imaging light path set 30 or the focusing imaging light path set 50 is arranged in the fourth through hole; the side walls of the auxiliary support plate 32 are each provided with a support threaded hole 321 in communication with the fourth through hole, and a support bolt is threadedly connected in the support threaded hole 321, and the threaded end of the support bolt can abut against the outer side wall of the lens of the collimating imaging light path set 30 or the focusing imaging light path set 50. The auxiliary support plate 32 is arranged in parallel with the main support plate 31, and the two plates collectively provide support for the lens, so that the collimating imaging light path set 30 or the focusing imaging light path set 50 is more stably installed.

[0058] In the optional solution of the embodiment, preferably, one support threaded hole 321 is arranged on the bottom side wall of the auxiliary support plate 32, and the support bottom plate 33 and the fixed bottom plate 10 are each provided with a support adjusting through hole at a position corresponding to the support threaded hole 321. Arranging one support threaded hole 321 on the bottom side wall of the auxiliary support plate 32, in combination with the corresponding support adjusting through holes on the support bottom plate 33 and the fixed bottom plate 10, provides a direct and convenient adjusting channel for the installer, so that the support and fixation of the support threaded hole 321 at the bottom of the auxiliary support plate 32 are simpler, more convenient and faster.

[0059] Specifically, the chief ray angle of the focusing imaging light path set 50 should be equivalent to the chief ray angle received by the detector assembly 60, and too large or too small will affect the dispersion of the spectrum, and the installation of the detector assembly 60 should be able to meet the flange distance or the distance from the last lens of the lens to the mirror surface.

[0060] Among them, the related setting of the grating set 40 is as follows:

[0061] Specifically, the grating set 40 comprises a grating adjusting plate 41, a grating element 42 and a grating seat 43; the grating seat 43 fixes the grating element 42 on the grating adjusting plate 41.

[0062] In the optional solution of the embodiment, preferably, when the grating group 40 is a fixed grating, the detector assembly 60 is a wide-area array detector; when the grating group 40 is a rotating grating, the detector assembly 60 is a narrow-area array detector, and an exit slit group is further arranged on the light path (the exit slit group is an existing component, and its composition and arrangement position are the same as those of the existing one, and will not be described here again). The light path of the fixed grating is relatively fixed and simple, the wide-area array detector can receive a large range of spectral information at one time, the characteristics of the exit light of the fixed grating are fully utilized, information omission is avoided, light is captured to the maximum extent, the spatial resolution of spectral imaging is improved, a large-area detection area can completely cover the spectral band after grating dispersion, the final spectral image is more complete and clear, and data acquisition is more comprehensive; for the rotating grating, the spectral range is scanned by continuously changing the diffraction angle through rotation, and the narrow-area array detector is matched with the rotating grating. Due to the dynamic change of the exit light angle and position at different times during the rotation, the narrow-area array detector can quickly and accurately focus on a specific small-range spectral area dispersed by the grating at the current time by virtue of a small detection area, high-time-resolution detection is realized, rapidly changing spectral information is tracked, interference and blur caused by a too large detection range are reduced, and the accuracy of data is improved; the exit slit group can be selected and arranged according to the cost and other requirements.

[0063] Specifically, the fixed grating directly disperses and images the entire spectral range to the wide-area array detector; the rotating grating is used in combination with the narrow-area array detector, and a precise linear rotating mechanism selects wavelengths to scan and image wavelengths in time.

[0064] Specifically, the exit slit group is used in combination with the rotating grating to measure the values of the entire spectral range by scanning.

[0065] In the optional solution of the embodiment, preferably, the straightness adjustment range of the grating group 40 is ±3 mm; the adjustment range of the pitch angle of the grating group 40 is ±0.2 deg; and the adjustment range of the azimuth angle of the grating group 40 is ±0.2 deg. The clear adjustment range provides clear guidance for the assembly and adjustment personnel, reduces the assembly and adjustment difficulty, compared with the case of no standard adjustment range and full experience groping, the operator can quickly and efficiently complete the calibration work by adjusting the straightness, pitch angle and azimuth angle of the grating group 40 according to the set range, the assembly period of the instrument is greatly shortened, the production efficiency is improved, and the product quality problems caused by assembly and adjustment errors are reduced.

[0066] Among them, the other related settings are as follows:

[0067] In the optional solution of the embodiment, preferably, as shown in FIG. 6, the grating group 40 is arranged on the light path of the light source 10, and the detector assembly 60 is arranged on the light path of the grating group 40. Figure 1 、 Figure 2 、 Figures 5-7As shown, the positions of the first through hole 212 of the slit adjusting plate 21, the fourth through hole 213 of the slit adjusting plate 21, the second through hole 331 of the support bottom plate 33 and the third through hole 411 of the grating adjusting plate 41 are fixedly provided with bosses. The structure of the boss can guarantee the strength of the connection, and the structure of the boss is easier to identify and operate. Workers can quickly locate the key connection point by means of the boss, reduce the adjustment time, and improve the adjustment efficiency.

[0068] The principle and implementation mode of the specific examples applied in the utility model are described, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, for the general skilled in the art, the specific implementation mode and application range will be changed according to the idea of the utility model. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A compact, easy-to-align imaging spectrometer monochromator, characterized by: The fixed bottom plate, the incident slit group, the collimating imaging light path group, the grating group, the focusing imaging light path group and the detector group are sequentially arranged on the light path; The incident slit group is connected to the fixed bottom plate through a slit adjusting plate; the slit adjusting plate has a first through hole, and the incident slit group is arranged in the first through hole; a plurality of first through holes are arranged on the circumference of the first through hole, and the incident slit group is provided with a first threaded hole corresponding to the position of each first through hole; a first bolt is arranged in the first through hole, the threaded end of the first bolt is screwed into the first threaded hole, and a plurality of first gaskets are arranged between the first through hole and the first threaded hole. The collimating imaging light path group and the focusing imaging light path group are arranged on the fixed bottom plate through a support adjusting assembly; the support adjusting assembly includes a main support plate and a support bottom plate; the main support plate is fixedly arranged on the support bottom plate; the main support plate is provided with a second through hole, and the main support plate is fixedly provided with an adapter flange having an internal threaded hole; the lens of the collimating imaging light path group or the focusing imaging light path group is arranged in the second through hole and screwed into the internal threaded hole of the adapter flange; the support bottom plate is provided with a plurality of second through holes, and the fixed bottom plate is provided with a second threaded hole corresponding to the position of each second through hole; a second bolt is arranged in the second through hole, the threaded end of the second bolt is screwed into the second threaded hole, and a plurality of second gaskets are arranged between the second through hole and the second threaded hole. The grating group is connected to the fixed bottom plate through a grating adjusting plate; the lower end of the grating adjusting plate has a plurality of third through holes, and the fixed bottom plate is provided with a third threaded hole corresponding to the position of each third through hole; a third bolt is arranged in the third through hole, the threaded end of the third bolt is screwed into the third threaded hole, and a plurality of third gaskets are arranged between the third through hole and the third threaded hole.

2. The easy-to-assemble imaging spectrometer monochromator of claim 1, wherein: The support adjusting assembly further includes an auxiliary support plate; The auxiliary support plate is arranged in parallel with the main support plate, and the lower end of the auxiliary support plate is fixedly arranged on the support bottom plate; the auxiliary support plate is provided with a fourth through hole, and the lens of the collimating imaging light path group or the focusing imaging light path group is arranged in the fourth through hole; Each side wall of the auxiliary support plate is provided with a support threaded hole in communication with the fourth through hole, and a support bolt is screwed into the support threaded hole; the threaded end of the support bolt can abut against the outer side wall of the lens of the collimating imaging light path group or the focusing imaging light path group.

3. The easy-to-assemble imaging spectrometer monochromator of claim 1, wherein: The lower end of the slit adjusting plate has a plurality of fourth through holes, and the fixed bottom plate is provided with a plurality of fourth threaded holes corresponding to the position of each fourth through hole; a fourth bolt is arranged in the fourth through hole, the threaded end of the fourth bolt is screwed into the fourth threaded hole; a plurality of fourth gaskets are arranged between the fourth through hole and the fourth threaded hole.

4. The easy-to-assemble imaging spectrometer monochromator of claim 2, wherein: The bottom side wall of the auxiliary support plate is provided with a support threaded hole, and the support bottom plate and the fixed bottom plate are provided with support adjusting through holes corresponding to the position of the support threaded hole.

5. The easy-to-assemble imaging spectrometer monochromator of claim 1, wherein: When the grating group is a fixed grating, the detector assembly is a wide area array detector; when the grating group is a rotating grating, the detector assembly is a narrow area array detector, and an exit slit group is further arranged on the light path.

6. The easy-to-assemble imaging spectrometer monochromator of claim 1, wherein: The incident slit group comprises a slit seat, a slit fixing ring plate and a slit unit; The slit seat is arranged in the first through hole, and the slit seat has a resting groove and a resting through hole in communication with the resting groove, and the inner diameter of the resting through hole is smaller than the inner diameter of the resting groove; The slit unit has an incident slit, and the inner diameter of the slit unit is greater than the inner diameter of the resting through hole and smaller than the inner diameter of the resting groove; the slit unit is arranged in the resting groove, and the slit fixing ring plate is arranged on the side of the slit unit away from the resting through hole.

7. The easy-to-assemble imaging spectrometer monochromator of claim 1, wherein: The straightness of the collimating imaging light path group and the focusing imaging light path group is ≤0.05mm; the adjustment range of the pitch angle is ±0.5deg; The adjustment range of the azimuth angle is ±0.5deg.

8. The easy-to-assemble imaging spectrometer monochromator of claim 1, wherein: The adjustment range of the straightness of the grating group is ±3mm; the adjustment range of the pitch angle is ±0.2deg; and the adjustment range of the azimuth angle is ±0.2deg.

9. The easy-to-assemble imaging spectrometer monochromator of claim 6, wherein: The incident slit is parallel to the grating lines on the grating group.

10. The easy-to-assemble imaging spectrometer monochromator of claim 3, wherein: The positions of the first through hole of the slit adjusting plate, the fourth through hole of the slit adjusting plate, the second through hole of the support bottom plate and the third through hole of the grating adjusting plate are fixedly provided with bosses.

Images