View field linear scanning mechanism for optical instrument and optical instrument

Abstract

The invention relates to a field-of-view linear scanning mechanism and an optical instrument. Wherein the field-of-view linear scanning mechanism is arranged between a front light path and a slit of the optical system and comprises a first motion scanning group, a second motion scanning group and a fixed position scanning group, and the motion directions of the first motion scanning group and the second motion scanning group are respectively perpendicular to the direction of the slit of the optical system; light of the front light path sequentially passes through the first motion scanning set, the second motion scanning set and the fixed position scanning set and then is emitted to the slit, the first motion speed of the first motion scanning set and the second motion speed of the second motion scanning set are configured to be in a preset proportion, and the first motion speed is larger than the second motion speed. The preset proportion enables the image surface of the optical system to be always kept stable at the slit, so that the field-of-view linear scanning mechanism can perform full-field-of-view scanning on the optical system; the device has the advantages that the occupied space of an optical system is not increased, and the device does not occupy the optical system and is small in size and space, integrated and the like.

Description

Technical Field

[0001] This application relates to the technical field of optical instruments, and particularly relates to a field-of-view linear scanning mechanism for an optical instrument and an optical instrument. Background Art

[0002] In optical instruments, a field-of-view scanning mechanism is usually used to expand the observation field of view without increasing the occupied space of the optical system. The field-of-view scanning mechanism is also applied to scenarios that require multi-dimensional imaging line by line, and is widely used in many fields such as aviation, aerospace, military, and medical, as well as in many technical categories such as three-dimensional imaging, spectral imaging, and microscopic imaging.

[0003] Traditional field-of-view scanning mechanisms usually achieve their functions by means of rotational scanning. According to the different rotating components, they can be divided into driving the optical system to rotate and driving the scanning mirror to rotate, etc. However, whether it is the optical system or the scanning mirror that is driven, components for driving the scanning motion need to be extended outside the optical system, which will occupy additional volume, space, and weight.

[0004] Therefore, the above-mentioned existing technical problems need to be solved urgently. Summary of the Invention

[0005] In view of this, the field-of-view linear scanning mechanism for an optical instrument and the optical instrument provided by this application aim to solve at least one of the following problems: In the prior art, for the field-of-view linear scanning mechanism for an optical instrument, components for driving the scanning motion need to be extended outside the optical system, thus there are technical problems of occupying additional volume, space, and weight.

[0006] In the first aspect of this application, a field-of-view linear scanning mechanism for an optical instrument is provided. The field-of-view linear scanning mechanism is arranged between the front optical path of the optical system and the slit. The field-of-view linear scanning mechanism includes a first motion scanning group, a second motion scanning group, and a fixed-position scanning group. The motion directions of the first motion scanning group and the second motion scanning group are respectively perpendicular to the slit direction of the optical system. The light rays of the front optical path respectively pass through the first motion scanning group, the second motion scanning group, and the fixed-position scanning group in sequence and then exit to the slit, where: The first motion speed of the first motion scanning group and the second motion speed of the second motion scanning group are configured to be in a preset ratio, and the first motion speed is greater than the second motion speed. The preset ratio is such that the image plane of the optical system can always be kept stable at the slit, so that the field-of-view linear scanning mechanism can perform full-field scanning on the optical system.

[0007] Optionally, both the first motion scanning group and the second motion scanning group include an optical group and a motor group; the field-of-view linear scanning mechanism further includes a mounting base, a linear guide rail, a controller, and a position sensor group, all of which are mounted on the mounting base, where: The fixed-position scanning group is mounted on the mounting base. The optical groups corresponding to the first motion scanning group and the second motion scanning group are respectively mounted on the linear guide rail. The fixed parts of the motor groups corresponding to the first motion scanning group and the second motion scanning group are respectively mounted on the mounting base. The position sensor group is respectively mounted and connected to the moving parts of the motor groups and the moving parts of the optical groups according to a preset matching relationship; The position sensor group is used to respectively detect the position change signals of the first motion scanning group and the second motion scanning group, and send the corresponding position change signals to the controller.

[0008] Optionally, the first motion scanning group includes a first optical group, and the first optical group includes a diaphragm and a first mirror. The light in the front optical path is incident on the first mirror after passing through the diaphragm; The second motion scanning group includes a second optical group, and the second optical group includes a second mirror and a third mirror. The second mirror and the first mirror are arranged parallel to each other, and the third mirror and the second mirror are arranged perpendicular to each other. The light passing through the first mirror passes through the second mirror and the third mirror in sequence; The fixed-position scanning group includes a third optical group, and the third optical group includes a fourth mirror. The fourth mirror is arranged perpendicular to the third mirror. The light passing through the third mirror is then incident on the slit inside the optical system after passing through the fourth mirror.

[0009] Optionally, the first optical group further includes a first mirror mount, and the diaphragm and the first mirror are respectively mounted on the first mirror mount; The second optical group further includes a second mirror mount, and the second mirror and the third mirror are respectively mounted on the second mirror mount; The third optical group further includes a third mirror mount, and the fourth mirror is mounted on the third mirror mount.

[0010] Optionally, the first motion scanning group includes a first motor group, and the first motor group is used to drive the first optical group to move along a direction perpendicular to the slit of the optical system; The second motion scanning group includes a second motor group, and the second motor group is used to drive the second optical group to move along a direction perpendicular to the slit of the optical system; Wherein, the first motion speed of the first motor group and the second motion speed of the second motor group are configured as the preset values, and the first motion speed of the first motor group is greater than the second motion speed of the second motor group.

[0011] Optionally, the linear guide rail includes a linear guide rail track, a first slider and a second slider respectively installed on the linear guide rail track. The first mirror base is installed on the first slider of the linear guide rail track, and the second mirror base is installed on the second slider of the linear guide rail track.

[0012] Optionally, the fixed parts of the first motor group and the second motor group both include coils and coil seats, and the moving parts of the first motor group and the second motor group both include permanent magnets and permanent magnet seats, wherein: The coil seats of the first motor group and the second motor group are respectively installed on the installation base, and the coils of the first motor group and the second motor group are respectively installed on the corresponding coil seats; The permanent magnets of the first motor group and the second motor group are respectively installed on the corresponding permanent magnet seats, and are respectively connected and installed with the first mirror base and the second mirror base to respectively drive the first mirror base and the second mirror base to move.

[0013] Optionally, the position sensor includes a first displacement sensor corresponding to the first motion scanning group and a second displacement sensor corresponding to the second motion scanning group, wherein: The first displacement sensor is used to send a first position change signal for detecting the first motion scanning group to the controller; The second displacement sensor is used to send a second position change signal for detecting the second motion scanning group to the controller; The controller realizes closed-loop control according to the first position change signal and the second position change signal, so that the first motion speed of the first motion scanning group and the second motion speed of the second motion scanning group satisfy the preset ratio.

[0014] Optionally, both the first displacement sensor and the second displacement sensor are high-precision linear grating rulers. The high-precision linear grating ruler includes a scale and a reading head; the scale of the grating ruler is installed on the corresponding permanent magnet seat, and the reading head of the grating ruler is installed on the installation base.

[0015] A second aspect of the present application provides an optical instrument, wherein the optical instrument includes the field-of-view linear scanning mechanism according to any one of the first aspects of the present application.

[0016] Compared with the prior art, the field-of-view linear scanning mechanism of the present application has at least the following beneficial effects: The field-of-view linear scanning mechanism for an optical instrument of the present application. The field-of-view linear scanning mechanism in the above embodiment arranges an optical group configured to include a first motion scanning group, a second motion scanning group, and a fixed-position scanning group between the front optical path and the slit of the optical system, so that the light source of the front optical path sequentially passes through the first motion scanning group, the second motion scanning group, and the fixed-position scanning group, and configures the motion directions of the first motion scanning group and the second motion scanning group to be perpendicular to the slit direction of the optical system, and by configuring the motion speeds of the first motion scanning group and the second motion scanning group to a preset ratio, it can always keep the image plane of the front-end optical system stable at the slit, so that the field-of-view linear scanning mechanism can perform full-field scanning on the front-end optical system. Compared with the traditional related technology that needs to configure a corresponding rotating mechanism, the field-of-view linear scanning mechanism disclosed in the present application has the characteristics of being arranged inside the optical system, not increasing the occupied space of the optical system, not occupying space outside the optical system, having a small size and integration, etc. At the same time, it can also meet the functional requirements of expanding the observation field of view or completing line-by-line multi-dimensional imaging.

[0017] Other features and advantages of the embodiments of the present application will be described in the following specification, and some of them will become obvious from the specification, or can be understood by implementing the embodiments of the present application. The objectives and other advantages of the embodiments of the present application are achieved and obtained by the structures specifically pointed out in the specification and the drawings. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a general layout schematic diagram of the field-of-view linear scanning mechanism provided by the embodiments of the present invention; Figure 2 It is an axonometric view of the field-of-view linear scanning mechanism provided by the embodiments of the present invention; Figure 3 It is a front view of the field-of-view linear scanning mechanism provided by the embodiments of the present invention; Figure 4 It is a bottom view of the field-of-view linear scanning mechanism provided by the embodiments of the present invention; Figure 5 It is a cross-sectional view of the field-of-view linear scanning mechanism provided by the embodiments of the present invention.

[0020] Among them, the following is the description of the reference numerals: 1 - Mounting base 2 - Optical group; 201 - First lens holder, 202 - First reflector; 203 - Diaphragm; 204 - Second reflector; 205 - Third reflector; 206 - Second lens holder; 207 - Third lens holder; 208 - Fourth reflector 3 - Linear guide; 301 - First slider, 302 - Second slider, 303 - Linear guide track 4 - Controller 5 - Position sensor group; 501 - Grating scale strip, 502 - Grating scale reader head 6 - Motor group; 601 - First magnet seat, 602 - First coil seat, 603 - Magnet, 604 - Coil, 605 - Second coil seat, 606 - Second magnet seat v_fast - First moving speed; v_slow - Second moving speed Detailed implementation manners

[0021] Although the above embodiments have been described in the text of the specification and the drawings of this application, the patent protection scope of this application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of this application and using the content recorded in the text of the specification and the drawings of this application, as well as those directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of this application.

[0022] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0023] As described in the background art, in the technical field of optical instruments, a field of view scanning mechanism is usually used to expand the observation field of view without increasing the occupied space of the optical system. The field of view scanning mechanism is also applied to scenarios that require multi - dimensional imaging row by row, and is widely used in many fields such as aviation, aerospace, military, medical, etc., and in many technical categories such as three - dimensional imaging, spectral imaging, and microscopic imaging.

[0024] In actual application scenarios, the inventor found that traditional field-of-view scanning mechanisms usually achieve their functions through rotational scanning. Depending on the rotating components, they can be divided into driving the optical system to rotate and driving the scanning mirror to rotate, etc. However, whether it is the optical system or the scanning mirror being driven, additional components for driving the scanning motion need to be extended outside the optical system, which will occupy extra volume, space, and weight. To solve the above technical problems, the inventive concept of this application emerged, which will be specifically described through the following embodiments.

[0025] In a first aspect of the present application, a field-of-view linear scanning mechanism for an optical instrument is provided. As Figure 1 shown, this field-of-view linear scanning mechanism is arranged inside the optical system, specifically between the front optical path and the slit of the optical system.

[0026] Specifically, as Figure 1 shown, in one embodiment, the field-of-view linear scanning mechanism includes a first motion scanning group, a second motion scanning group, and a fixed-position scanning group (i.e., the fixed group in Figure 1 ). The motion directions of the first motion scanning group and the second motion scanning group are respectively perpendicular to the slit direction of the optical system. The light in the front optical path sequentially passes through the first motion scanning group, the second motion scanning group, and the fixed-position scanning group and then exits to the slit, where: The first motion speed of the first motion scanning group and the second motion speed of the second motion scanning group are configured to be in a preset ratio, and the first motion speed is greater than the second motion speed. That is to say, the first motion speed scanning group can be understood as the fast-scanning group shown in Figure 1 , and the second motion speed scanning group can be understood as the slow-scanning group shown in Figure 1 . This preset ratio is such that the image plane of the front-end optical system can always be kept stable at the slit. Exemplarily, this preset ratio can be the first motion speed v_fast: the second motion speed v_slow = 2:1, or other values, which can be specifically selected and configured according to the actual scenario and are not specifically limited here, so that the field-of-view linear scanning mechanism can perform a full-field scan of the front-end optical system and can meet the functional requirements of expanding the observation field of view or completing line-by-line multi-dimensional imaging.

[0027] In the field of view linear scanning mechanism in the above embodiments, by arranging the optical group 2 configured to include a first motion scanning group, a second motion scanning group, and a fixed position scanning group between the front optical path of the optical system and the slit, so that the light source in the front optical path sequentially passes through the first motion scanning group, the second motion scanning group, and the fixed position scanning group, and the motion directions of the first motion scanning group and the second motion scanning group are respectively configured to be perpendicular to the slit direction of the optical system, and by configuring the motion speeds of the first motion scanning group and the second motion scanning group to be in a preset ratio, it can ensure that the image plane of the front-end optical system always remains stable at the slit, so that the field of view linear scanning mechanism can perform full-field scanning on the front-end optical system. Compared with the traditional related technology that needs to configure a corresponding rotation mechanism, the field of view linear scanning mechanism disclosed in this application has many characteristics such as being arranged inside the optical system, not increasing the occupied space of the optical system, not occupying the volume space outside the optical system, being miniaturized and integrated, etc., and at the same time, it can also meet the functional requirements of expanding the observation field of view or completing line-by-line multi-dimensional imaging.

[0028] In one embodiment, both the first motion scanning group and the second motion scanning group include an optical group 2 and a motor group 6; as Figures 2 - 5 shown, the field of view linear scanning mechanism further includes a mounting base 1, a linear guide rail 3, a controller 4, and a position sensor group 5 all mounted on the mounting base 1, where: The fixed position scanning group in the above embodiments is mounted on the mounting base 1, the optical groups 2 corresponding to the first motion scanning group and the second motion scanning group are respectively mounted on the linear guide rail 3, the fixed parts of the motor groups 6 corresponding to the first motion scanning group and the second motion scanning group are respectively mounted on the mounting base 1, and the position sensor group 5 is respectively mounted and connected to the moving parts of the motor groups 6 and the moving parts of the optical groups 2 according to a preset matching relationship; Specifically, the position sensor group 5 is used to respectively detect the position change signals of the first motion scanning group and the second motion scanning group, and send the corresponding position change signals to the controller 4, so that the controller 4 controls the motion speed of the corresponding motor group 6 according to the corresponding position change signals, thereby realizing real-time adjustment and control of the corresponding motor group.

[0029] In the above embodiments, corresponding mechanisms such as the mounting base 1 are further disclosed. The mounting base 1 can be understood as the main support frame structure, which can serve as the load-bearing component of the entire field-of-view linear scanning mechanism, provide mounting interfaces for each component, and at the same time provide an interface for mounting the field-of-view linear scanning mechanism in the optical system. In this way, each key mechanism involved in the field-of-view linear scanning mechanism is integrated on the mounting base 1 to further improve the integration of the field-of-view linear scanning mechanism. In addition, the controller 4 is directly integrated and mounted on the mounting base 1 of the field-of-view linear scanning mechanism to form a modular product, and at the same time, the signal quality is optimized to meet the control accuracy of the field-of-view linear scanning mechanism.

[0030] In one embodiment, as Figure 1 and Figure 4 shown, the first motion scanning group includes the first optical group 2. The first optical group 2 includes a diaphragm 203 and a first mirror 202. The light in the front optical path is incident on the first mirror 202 after passing through the diaphragm 203. The second motion scanning group includes the second optical group 2. The second optical group 2 includes a second mirror 204 and a third mirror 205. The second mirror 204 and the first mirror 202 are arranged in parallel, and the third mirror 205 and the second mirror 204 are arranged perpendicular to each other. That is, the second motion scanning group carries two perpendicularly arranged mirrors. The light passing through the first mirror 202 passes through the second mirror 204 and the third mirror 205 in sequence. The fixed-position scanning group includes the third optical group 2. The third optical group 2 includes a fourth mirror 208. The fourth mirror 208 is arranged perpendicular to the third mirror 205. The light passing through the third mirror 205 is incident on the slit inside the optical system after passing through the fourth mirror 208.

[0031] In the above embodiments, the mechanism compositions of the first motion scanning group and the second motion scanning group and the configuration methods of each mechanism are further disclosed to enable the optical path transmission of the field-of-view linear scanning mechanism.

[0032] In one embodiment, in order to mount and fix the corresponding optical group 2, specifically, as Figure 4 shown, the first optical group 2 may further include a first lens holder 201. Among them, the diaphragm 203 and the first mirror 202 in the above embodiments are respectively mounted on the first lens holder 201. The second optical group 2 may further include a second lens holder 206. The second mirror 204 and the third mirror 205 are respectively mounted on the second lens holder 206.

[0033] The third optical group 2 may further include a third lens holder 207. The third lens holder 207 can be understood as a fixed lens holder, and the fourth mirror 208 is respectively mounted on the third lens holder 207.

[0034] The installation method in the above embodiments can be specifically realized by bonding. The corresponding optical group 2 in the above embodiments is further disclosed to include a corresponding lens holder to enable the fixed installation of the optical group 2.

[0035] In one embodiment, as Figure 2 and Figure 3 shown, the first motion scanning group includes a first motor group 6, and the first motor group 6 is used to drive the first optical group 2 to move along the direction perpendicular to the slit of the optical system; The second motion scanning group further includes a second motor group 6, and the second motor group 6 is used to drive the second optical group 2 to move along the direction perpendicular to the slit of the optical system; Wherein, the first motion speed of the first motor group 6 is greater than the second motion speed of the second motor group 6, and the first motion speed of the first motor group 6 and the second motion speed of the second motor group 6 are configured as preset values. As described in the above embodiments, the preset values can enable the image plane of the front-end optical system to always remain stable at the slit, so that the field-of-view linear scanning mechanism can perform full-field scanning on the front-end optical system. Specifically, it is not specifically limited and can be selected according to the actual scenario.

[0036] In one embodiment, as Figure 4 and Figure 5 shown, the linear guide 3 in the above embodiments includes a linear guide rail track 303 and a first slider 301 and a second slider 302 respectively installed on the linear guide rail track 303. Specifically, the first lens holder 201 is installed on the first slider 301 of the linear guide rail track 303, and the second lens holder 206 is installed on the second slider 302 of the linear guide rail track 303. During specific installation, it can be installed through a fastening connection structure, and the fastening connection structure can include but is not limited to, for example, screws or bolts, etc. Specifically, it is not specifically limited and can be selected according to the actual scenario.

[0037] It should be noted that since the accuracy of the linear guide 3 determines the pointing jitter of the scanning mechanism, in the actual application scenario, the linear guide 3 can be a single-group guide rail, and in order to improve the accuracy, it can also be a multi-group guide rail. Here, it is not specifically limited and can be selected and configured according to the actual scenario.

[0038] In one embodiment, as Figure 5 shown, the fixed parts of the first motor group 6 and the second motor group 6 both include coils and coil seats, and the moving parts of the first motor group 6 and the second motor group 6 both include magnetic steels and magnetic steel seats, wherein: The coil seats of the first motor group 6 and the second motor group 6 are respectively installed on the installation base 1, and the coils of the first motor group 6 and the second motor group 6 are respectively installed on the corresponding coil seats; The magnetic steels of the first motor group 6 and the second motor group 6 are respectively installed on corresponding magnetic steel seats, and are respectively connected and installed with the first mirror seat 201 and the second mirror seat 206 to drive the first mirror seat 201 and the second mirror seat 206 to move respectively.

[0039] In the actual application scenario, 2 first magnetic steel seats 601, 2 second magnetic steel seats 606 and 4 magnetic steels 603 can be configured respectively for the first motion scanning group and the second motion scanning group. 2 magnetic steels 603 are respectively bonded inside each first magnetic steel seat 601 and each second magnetic steel seat 606; specifically, the first magnetic steel seat 601 is connected to the second magnetic steel seat 606 by screws, and 1 second magnetic steel seat 606 is connected to the first mirror seat 201 by screws (as the first motion scanning group), and the other second magnetic steel seat 606 is connected to the second mirror seat 206 by screws (as the second motion scanning group); specifically, by adjusting the installation positions of the first coil seat 602 and the second coil seat 605 on the installation base 1, the gap between the adjustment coil 604 and the magnetic steel 603 is adjusted to meet the requirements.

[0040] In one embodiment, as Figure 2 and Figure 3 shown, the position sensor 5 in the above embodiment may include a first displacement sensor corresponding to the first motion scanning group and a second displacement sensor corresponding to the second motion scanning group. Specifically, both the first speed displacement sensor and the second speed displacement sensor can be selectively configured as high-precision linear grating scales. The high-precision linear grating scale may include a scale piece 501 and a reading head 502. As a preferred embodiment, it may include 4 grating scale pieces 501 and 4 grating scale reading heads 502. Specifically, the first speed scanning group and the second speed scanning group respectively use 2 grating scale pieces 501 and 2 grating scale reading heads 502 as the main and backup corresponding to the first speed scanning group and the second speed scanning group respectively; among them, the scale piece 501 of the grating scale can be installed on the magnetic steel seat in the above embodiment. Specifically, the scale piece 501 of the grating scale can be installed on the magnetic steel seat by bonding (as the moving part of the motor group 6), and moves together with the moving component. The reading head 502 of the grating scale is installed on the installation base 1 to adjust the relative position between the second magnetic steel seat 606 and the first mirror seat 201 or the second mirror seat 206, so that the gap between the scale piece 501 of the grating scale and the reading head 502 of the grating scale is adjusted to meet the requirements; in the actual application scenario, the relative movement between the scale piece 501 of the grating scale and the reading head 502 of the grating scale generates a position change signal, and then the position change signal is fed back to the controller 4. The controller 4 forms a control closed loop according to the position change signal, and further realizes the speed matching of the first motion scanning group and the second motion scanning group, so that the working process of the field-of-view linear scanning mechanism is more stable and efficient.

[0041] In the second aspect of the present application, an optical instrument is provided, which includes the field-of-view linear scanning mechanism in any of the embodiments of the first aspect above.

[0042] Regarding the optical instrument in the above embodiments, in view of the beneficial effects of the field-of-view linear scanning mechanism in the above embodiments, this optical instrument also has the same beneficial effects. To avoid redundancy, it will not be elaborated here.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0044] The above specific embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A field-of-view linear scanning mechanism for an optical instrument, characterized in that, Arranged between the front optical path of the optical system and the slit; the field-of-view linear scanning mechanism includes a first motion scanning group, a second motion scanning group, and a fixed-position scanning group. The motion directions of the first motion scanning group and the second motion scanning group are respectively perpendicular to the slit direction of the optical system. The light rays of the front optical path sequentially pass through the first motion scanning group, the second motion scanning group, and the fixed-position scanning group and then exit to the slit. Among them: The first motion speed of the first motion scanning group and the second motion speed of the second motion scanning group are configured to be in a preset ratio, and the first motion speed is greater than the second motion speed. The preset ratio is such that the image plane of the optical system can always be kept stable at the slit, so that the field-of-view linear scanning mechanism can scan the entire field of view of the optical system.

2. The field of view linear scanning mechanism according to claim 1, characterized in that Both the first motion scanning group and the second motion scanning group include an optical group and a motor group; the field-of-view linear scanning mechanism further includes a mounting base, a linear guide rail, a controller, and a position sensor group, all of which are mounted on the mounting base. Among them: The fixed-position scanning group is mounted on the mounting base. The optical groups corresponding to the first motion scanning group and the second motion scanning group are respectively mounted on the linear guide rail. The fixed parts of the motor groups corresponding to the first motion scanning group and the second motion scanning group are respectively mounted on the mounting base. The position sensor group is respectively mounted and connected to the moving parts of the motor groups and the moving parts of the optical groups according to a preset matching relationship. The position sensor group is used to respectively detect the position change signals of the first motion scanning group and the second motion scanning group, and send the corresponding position change signals to the controller.

3. The field-of-view linear scanning mechanism according to claim 2, wherein The first motion scanning group includes a first optical group. The first optical group includes a diaphragm and a first mirror. The light rays of the front optical path pass through the diaphragm and then are incident on the first mirror. The second motion scanning group includes a second optical group. The second optical group includes a second mirror and a third mirror. The second mirror and the first mirror are arranged parallel to each other. The third mirror and the second mirror are arranged perpendicular to each other. The light rays passing through the first mirror sequentially pass through the second mirror and the third mirror. The fixed-position scanning group includes a third optical group. The third optical group includes a fourth mirror. The fourth mirror and the third mirror are arranged perpendicular to each other. The light rays passing through the third mirror are then reflected by the fourth mirror and shot towards the slit inside the optical system.

4. The field-of-view linear scanning mechanism according to claim 3, wherein The first optical group further includes a first mirror base. The diaphragm and the first mirror are respectively mounted on the first mirror base. The second optical group further includes a second mirror base. The second mirror and the third mirror are respectively mounted on the second mirror base. The third optical group further includes a third mirror base. The fourth mirror is mounted on the third mirror base.

5. The field-of-view linear scanning mechanism according to claim 3, wherein the first motion scanning group includes a first motor group, and the first motor group is used to drive the first optical group to move along a direction perpendicular to the slit of the optical system; the second motion scanning group includes a second motor group, and the second motor group is used to drive the second optical group to move along a direction perpendicular to the slit of the optical system; wherein, the first motion speed of the first motor group and the second motion speed of the second motor group are configured as the preset values, and the first motion speed of the first motor group is greater than the second motion speed of the second motor group.

6. The field of view linear scanning mechanism according to claim 4, characterized in that, The linear guide rail includes a linear guide rail track, a first slider and a second slider respectively installed on the linear guide rail track. The first lens holder is installed on the first slider of the linear guide rail track, and the second lens holder is installed on the second slider of the linear guide rail track.

7. The field of view linear scanning mechanism according to any one of claims 4-6, characterized in that The fixed parts of the first motor group and the second motor group both include coils and coil seats, and the moving parts of the first motor group and the second motor group both include permanent magnets and permanent magnet seats, wherein: the coil seats of the first motor group and the second motor group are respectively installed on the installation base, and the coils of the first motor group and the second motor group are respectively installed on the corresponding coil seats; the permanent magnets of the first motor group and the second motor group are respectively installed on the corresponding permanent magnet seats, and are respectively connected and installed with the first lens holder and the second lens holder to drive the first lens holder and the second lens holder to move respectively.

8. The field-of-view linear scanning mechanism according to claim 7, characterized in that, The position sensor includes a first displacement sensor corresponding to the first motion scanning group and a second displacement sensor corresponding to the second motion scanning group, wherein: the first displacement sensor is used to send a first position change signal for detecting the first motion scanning group to the controller; the second displacement sensor is used to send a second position change signal for detecting the second motion scanning group to the controller; the controller realizes closed-loop control according to the first position change signal and the second position change signal, so that the first motion speed of the first motion scanning group and the second motion speed of the second motion scanning group meet the preset ratio.

9. The field-of-view linear scanning mechanism according to claim 8, wherein both the first displacement sensor and the second displacement sensor are high-precision linear grating rulers. The high-precision linear grating ruler includes a scale and a reading head; the scale of the grating ruler is installed on the corresponding permanent magnet seat, and the reading head of the grating ruler is installed on the installation base.

10. An optical instrument, characterized in that, The optical instrument includes the field-of-view linear scanning mechanism according to any one of claims 1-9.

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