Motion mechanism for realizing optical path difference generation method for large field of view and high spectral resolution detection

Abstract

The present invention discloses a motion mechanism for achieving a method for generating optical path differences in large-field-of-view and high-spectral-resolution detection, comprising a first optical mirror, a second optical mirror, a first-mirror spring, a second-mirror spring, and an internal fixed plate. The internal fixed plate, the first-mirror spring, and the second-mirror spring form a spring link, which, together with the first-mirror and second-mirror mounts, forms a door-shaped frame. With the fixed end of the fixed plate as a fulcrum, the mechanism can perform planar motion. A reciprocating driving force is applied to the second-mirror mount, causing the first-mirror spring and the second-mirror spring to produce elastic bending deformation, driving the first and second optical mirrors to perform planar motion in opposite directions at a set speed ratio. During motion, the optical mirror surfaces do not tilt at any angle. The optical path generated by the movement of the second optical mirror is greater for the central beam than for the oblique beam. The relative motion of the first and second optical mirrors causes the paths of the light beams within the optical element to change. The optical path generated by this process is less for the central beam than for the oblique beam. The optical mirror structure and motion speed ratio are designed to ensure that the optical paths of all light beams are consistent, thus achieving a large-field-of-view and high-spectral-resolution.

Description

Technical Field

[0001] The present invention relates to the technical field of infrared remote sensing detection technology, and in particular to a motion mechanism for realizing a method for generating an optical path difference for detection with a large field of view and high spectral resolution. Background Art

[0002] Satellite remote sensing technology is now widely used in weather forecasting and atmospheric chemical composition monitoring. Internationally, infrared atmospheric detection in the atmospheric infrared band is primarily conducted using payloads equipped with infrared hyperspectral detection technology. Using infrared Fourier transform interferometric vertical atmospheric sounders to detect atmospheric temperature, humidity, and composition requires high spectral resolution and a large detection field of view. Spectral resolution is determined by the value of the optical path difference (OPD), which is generated by the motion mechanism. If the optical field of view of the spectrometer detector within its interferometer is too large, the resulting spectral broadening will exceed the spectral resolution requirement. In this case, increasing the OPD will not improve spectral resolution.

[0003] Therefore, how to use the motion mechanism to make the optical path of all light beams consistent and achieve a large field of view and high spectral resolution becomes a technical problem that needs to be solved. Summary of the Invention

[0004] The purpose of the present invention is to provide a motion mechanism for realizing a method for generating optical path difference for detection with large field of view and high spectral resolution, mainly to solve the problem in the above-mentioned prior art of how to use the motion mechanism to make the optical path of all light beams consistent and realize large field of view and high spectral resolution.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a motion mechanism for realizing a method for generating an optical path difference for detection with a large field of view and high spectral resolution, characterized in that: the motion mechanism comprises an optical mirror, an optical mirror, a mirror base, a mirror base, a first group of mirror springs and mirror springs, a second group of mirror springs and mirror springs, wherein the first inner fixing plate and the first outer fixing plate are respectively provided with inner recesses at corresponding positions, the two inner recesses together form a first groove, the fixed end of the mirror spring of the first group is connected to the mirror base, the mirror spring of the first group is clamped by the first inner fixing plate and the first outer fixing plate, the movable end of the mirror spring of the first group is connected to the first fixing plate located in the first groove, the fixed end of the two mirror springs of the first group is connected to the mirror base, the movable ends of the two mirror springs of the first group are clamped by the first inner fixing plate and the first outer fixing plate, the mirror spring of the first group, the first inner fixing plate and the two mirror springs of the first group form a first spring connecting rod;

[0006] The second inner fixing plate and the second outer fixing plate are each provided with an inner recess at corresponding positions, and the two inner recesses together form a second groove; a fixed end of a mirror spring of the second group is connected to the mirror base of the same mirror; a mirror spring of the second group is clamped by the second inner fixing plate and the second outer fixing plate; a movable end of a mirror spring of the second group is connected to the second fixing plate located in the second groove; fixed ends of two mirror springs of the second group are connected to the mirror base of the second mirror; movable ends of two mirror springs of the second group are clamped by the second inner fixing plate and the second outer fixing plate; the mirror spring of the second group, the second inner fixing plate, and the two mirror springs of the second group form a second spring connecting rod;

[0007] The first groove and the second groove are located in corresponding positions;

[0008] When the two-mirror base moves with the optical second mirror in the plane, the first spring link uses the first fixed plate as a fulcrum, and the second spring link uses the second fixed plate as a fulcrum. The first spring link and the second spring link rotate in the same plane and drive the one-mirror base and the optical first mirror to move in the opposite plane to the optical second mirror.

[0009] Furthermore, the motion mechanism also includes a first clamping plate, a second clamping plate, a third clamping plate and a fourth clamping plate, the fixed end of a mirror spring of the first group is fixed between the first clamping plate and a mirror seat by a screw, the fixed end of a second mirror spring of the first group is fixed between the second clamping plate and the second mirror seat by a screw, the fixed end of a mirror spring of the second group is fixed between the third clamping plate and a mirror seat by a screw, and the fixed end of a second mirror spring of the second group is fixed between the fourth clamping plate and the second mirror seat by a screw.

[0010] Furthermore, one end of the mirror seat corresponding to the first splint is the first end, and the lower surface of the first end is flush with the lower edge of the first splint; one end of the mirror seat corresponding to the second splint is the second end, and the upper surface of the second end is flush with the upper edge of the second splint; one end of the mirror seat corresponding to the third splint is the third end, and the lower surface of the third end is flush with the lower edge of the third splint; one end of the mirror seat corresponding to the fourth splint is the fourth end, and the upper surface of the fourth end is flush with the upper edge of the fourth splint.

[0011] Furthermore, a first distance is set between the lower surface of the first mirror base and the upper surface of the first inner fixing plate, a second distance is set between the lower surface of the first mirror base and the upper surface of the second inner fixing plate, and the first distance and the second distance are equal; a third distance is set between the upper surface of the second mirror base and the lower surface of the first inner fixing plate, a fourth distance is set between the upper surface of the second mirror base and the lower surface of the second inner fixing plate, and the third distance and the fourth distance are equal;

[0012] The outer frame sizes of the first inner fixing plate, the first outer fixing plate, the second inner fixing plate and the second outer fixing plate are all the same;

[0013] The distance between the upper edge of the first fixing plate and the upper surface of the first groove is equal to the distance between the upper edge of the second fixing plate and the upper surface of the second groove.

[0014] Furthermore, the first mirror base and the second mirror base are two square plates or circular frames of the same size;

[0015] Furthermore, both the first optical mirror and the second optical mirror are wedge mirrors, and the first inclined surface of the first optical mirror and the second inclined surface of the second optical mirror are opposite to each other;

[0016] The first mirror spring and the second mirror spring of the first group and the first mirror spring and the second mirror spring of the second group all use spring sheets made of beryllium bronze;

[0017] The first mirror base, the second mirror base, the first clamping plate, the second clamping plate, the third clamping plate, the fourth clamping plate, the first inner fixing plate, the first outer fixing plate, the second inner fixing plate and the second outer fixing plate are all made of metal aluminum material.

[0018] Furthermore, a line connecting the centers of the two mirror springs of the first group and the centers of the two mirror springs of the second group forms a second straight line, and a line connecting the center of one mirror spring of the first group and the center of one mirror spring of the second group forms a first straight line, and the first straight line and the second straight line are parallel to each other and form a reference plane;

[0019] The plane motion of the two-mirror mount with the two optical mirrors refers to the movement of the two optical mirrors in a plane parallel to the reference plane; the plane motion of the one-mirror mount with the one optical mirror refers to the movement of the one optical mirror in a plane parallel to the reference plane.

[0020] Furthermore, the first optical mirror is rotated 180° clockwise to be placed in the same direction as the second optical mirror;

[0021] The first inclined surface of the optical mirror 1 is parallel to the reference plane, and the second inclined surface of the optical mirror 2 is parallel to the reference plane.

[0022] Furthermore, the optical mirror 1 is connected to the mirror base via a first Z-shaped plate, the optical mirror 2 is connected to the mirror base via a second Z-shaped plate, and the center of gravity of the motion mechanism is balanced to above the geometric center of the mirror base.

[0023] In view of the above technical features, the present invention has the following beneficial effects:

[0024] 1. The present invention provides a motion mechanism for realizing a method for generating optical path difference for detection with high spectral resolution over a large field of view. By compensating the optical path through wedge mirrors (i.e., optical mirror 1 and optical mirror 2), the invention breaks through the limit imposed by the field of view on the spectral resolution, and makes the spectral resolution of the edge field of view consistent with that of the center field of view. The invention can be applied to situations requiring a large field of view.

[0025] 2. The present invention provides a motion mechanism for realizing a method for generating optical path difference for detection with large field of view and high spectral resolution. During the movement of the first optical mirror and the second optical mirror, the optical mirror surface has good translational characteristics, small interference wavefront difference, and small light jitter during operation, thereby ensuring the interference performance of the interferometer.

[0026] 3. The present invention provides a motion mechanism for realizing a method for generating an optical path difference for detecting a large field of view and high spectral resolution. The optical mirror 1 and the optical mirror 2 simultaneously have the optical path difference compensation function and the optical path difference generation function during the motion process.

[0027] 4. The present invention provides a motion mechanism for realizing a method for generating optical path difference for detection with large field of view and high spectral resolution. The motion mechanism adopts springs (i.e., one mirror spring and two mirror springs) to realize reciprocating motion. The motion mechanism does not require bearings and can avoid all problems caused by lubrication.

[0028] 5. In the present invention, a motion mechanism for realizing a method for generating optical path difference for detection with large field of view and high spectral resolution is provided. The forward and reverse motion characteristics of the first optical mirror and the second optical mirror are consistent. Therefore, both forward and reverse motions can be used to generate interference patterns, thereby increasing detection efficiency.

[0029] 6. The motion mechanism of the present invention for realizing a method for generating optical path difference for detection with large field of view and high spectral resolution can break through the limitation of field of view on spectral resolution and meet the application occasions requiring both large field of view and high spectral resolution. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a stereoscopic diagram of a motion mechanism for realizing a method for generating an optical path difference for detection with a large field of view and high spectral resolution in specific embodiment 1.

[0031] In the figure: 1, optical mirror 1; 12, first Z-shaped plate;

[0032] 2. Optical second mirror; 22. Second Z-shaped plate;

[0033] 3. One mirror base;

[0034] 41. First plywood; 42. Second plywood; 43. Third plywood; 44. Fourth plywood;

[0035] 5. Two-mirror mount;

[0036] 60. first groove;

[0037] 61. First internal fixation plate;

[0038] 62. Second internal fixation plate;

[0039] 70. Second groove; 71. First outer fixing plate; 72. Second outer fixing plate;

[0040] 81. A mirror spring of the first group; 82. A mirror spring of the second group;

[0041] 91, the second mirror spring of the first group;

[0042] 92. Second mirror spring of the second group;

[0043] 101. First fixing plate; 102. Second fixing plate. DETAILED DESCRIPTION

[0044] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0045] See also Figure 1 Specific embodiment 1. This embodiment 1 provides a motion mechanism for realizing a method for generating an optical path difference for detection with a large field of view and high spectral resolution, comprising an optical mirror 1, an optical mirror 2, a mirror holder 3, a mirror holder 5, a first group of mirror springs 81 and a second group of mirror springs 91, a second group of mirror springs 82 and a second group of mirror springs 92, wherein the first inner fixing plate 61 and the first outer fixing plate 71 are each provided with an inner recess at corresponding positions, and the two inner recesses together form a first groove 60, the fixed end of the mirror spring 81 of the first group is connected to the mirror holder 3, the mirror spring 81 of the first group is clamped by the first inner fixing plate 61 and the first outer fixing plate 71, the movable end of the mirror spring 81 of the first group is connected to the first fixing plate 101 located in the first groove 60, the fixed end of the second mirror spring 91 of the first group is connected to the mirror holder 5, the movable end of the second mirror spring 91 of the first group is clamped by the first inner fixing plate 61 and the first outer fixing plate 71, and the mirror spring 81 of the first group, the first inner fixing plate 61 and the second mirror spring 91 of the first group form a first spring connecting rod.

[0046] The second inner fixing plate 62 and the second outer fixing plate 72 are respectively provided with an inner recess at corresponding positions, and the two inner recesses together form a second groove 70. The fixed end of a mirror spring 82 of the second group is connected to the mirror base 3, and the mirror spring 82 of the second group is clamped by the second inner fixing plate 62 and the second outer fixing plate 72. The movable end of the mirror spring 82 of the second group is connected to the second fixing plate 102 located in the second groove 70. The fixed end of the second mirror spring 92 of the second group is connected to the mirror base 5, and the movable ends of the second mirror spring 92 of the second group are clamped by the second inner fixing plate 62 and the second outer fixing plate 72. The mirror spring 82 of the second group, the second inner fixing plate 62 and the two mirror springs 92 of the second group form a second spring connecting rod.

[0047] The first groove 60 and the second groove 70 correspond in position, that is, the first groove 60 and the second groove 70 have the same shape and size, and the distance from the first groove 60 to the upper and lower ends of the first inner fixing plate 61 is equal to the distance from the second groove 70 to the upper and lower ends of the second inner fixing plate 62, ensuring that the first mirror base 3 and the second mirror base 5 can achieve reverse planar motion.

[0048] When the two-mirror base 5 moves with the optical second mirror 2 in a plane, the first spring link uses the first fixed plate 101 as a fulcrum, and the second spring link uses the second fixed plate 102 as a fulcrum. The first spring link and the second spring link rotate in the same plane and drive the one-mirror base 3 and the optical first mirror 1 to move in a plane opposite to the optical second mirror 2.

[0049] The motion mechanism also includes a first clamping plate 41, a second clamping plate 42, a third clamping plate 43 and a fourth clamping plate 44. The fixed end of the first mirror spring 81 of the first group is fixed between the first clamping plate 41 and the first mirror seat 3 by a screw, the fixed end of the second mirror spring 91 of the first group is fixed between the second clamping plate 42 and the second mirror seat 5 by a screw, the fixed end of the first mirror spring 82 of the second group is fixed between the third clamping plate 43 and the first mirror seat 3 by a screw, and the fixed end of the second mirror spring 92 of the second group is fixed between the fourth clamping plate 44 and the second mirror seat 5 by a screw.

[0050] One end of the first mirror base 3 corresponding to the first splint 41 is the first end, and the lower surface of the first end is flush with the lower edge of the first splint 41; one end of the second mirror base 5 corresponding to the second splint 42 is the second end, and the upper surface of the second end is flush with the upper edge of the second splint 42; one end of the first mirror base 3 corresponding to the third splint 43 is the third end, and the lower surface of the third end is flush with the lower edge of the third splint 43; one end of the second mirror base 5 corresponding to the fourth splint 44 is the fourth end, and the upper surface of the fourth end is flush with the upper edge of the fourth splint 44.

[0051] A first distance is set between the lower surface of the first mirror base 3 and the upper surface of the first inner fixed plate 61, a second distance is set between the lower surface of the first mirror base 3 and the upper surface of the second inner fixed plate 62, and the first distance and the second distance are equal; a third distance is set between the upper surface of the second mirror base 5 and the lower surface of the first inner fixed plate 61, a fourth distance is set between the upper surface of the second mirror base 5 and the lower surface of the second inner fixed plate 62, and the third distance and the fourth distance are equal; the outer frame dimensions of the first inner fixed plate 61, the first outer fixed plate 71, the second inner fixed plate 62 and the second outer fixed plate 72 are all the same; the distance between the upper edge of the first fixing plate 101 and the upper surface of the first groove 60 is equal to the distance between the upper edge of the second fixing plate 102 and the upper surface of the second groove 70.

[0052] The first mirror base 3 and the second mirror base 5 are two square plates or circular frames of the same size.

[0053] For example, the first inner fixing plate 61 and the first outer fixing plate 71 are two circular frames of the same size. The first fixing plate 101 and the second fixing plate 102 are used to fix the connection to other devices, that is, to fix the motion mechanism, and serve as a fulcrum to provide support for the first mirror base 3 and the second mirror base 5 to achieve reverse planar motion.

[0054] The first mirror spring 81 and the second mirror spring 91 of the first group, and the first mirror spring 82 and the second mirror spring 92 of the second group are all spring sheets made of beryllium bronze;

[0055] The first mirror base 3, the second mirror base 5, the first clamping plate 41, the second clamping plate 42, the third clamping plate 43, the fourth clamping plate 44, the first inner fixing plate 61, the first outer fixing plate 71, the second inner fixing plate 62 and the second outer fixing plate 72 are all made of metal aluminum.

[0056] A line connecting the centers of the two mirror springs 91 of the first group and the centers of the two mirror springs 92 of the second group forms a second straight line, and a line connecting the centers of the mirror springs 81 of the first group and the centers of the mirror springs 82 of the second group forms a first straight line. The first straight line and the second straight line are parallel and form a reference plane.

[0057] The plane motion of the two-mirror mount 5 carrying the optical second mirror 2 refers to the motion of the optical second mirror 2 in a plane parallel to the reference plane; the plane motion of the one-mirror mount 3 carrying the optical single mirror 1 refers to the motion of the optical single mirror 1 in a plane parallel to the reference plane.

[0058] Optical mirror 1 and optical mirror 2 are both wedge mirrors, and the first inclined surface of optical mirror 1 is opposite to the second inclined surface of optical mirror 2; for example, after optical mirror 1 is rotated 180° clockwise, it is placed in the same direction as optical mirror 2. In this way, by moving optical mirror 1 and optical mirror 2 in opposite directions, the thickness of the optical element can be controlled to increase or decrease, and the increase or decrease of the optical path can be indirectly controlled.

[0059] The first inclined surface of the optical mirror 1 is parallel to the reference plane, and the second inclined surface of the optical mirror 2 is parallel to the reference plane.

[0060] The optical first mirror 1 is connected to the first mirror base 3 through the first Z-shaped plate 12, and the optical second mirror 2 is connected to the second mirror base 5 through the second Z-shaped plate 22. The center of gravity of the motion mechanism is balanced to above the geometric center of the second mirror base 5.

[0061] For example, the motion mechanism of Example 1, which implements a method for generating an optical path difference for large-field-of-view, high-spectral-resolution detection, is used to generate an optical path difference in a large-field-of-view, high-spectral-resolution detector. The main parameters are: the second optical mirror 22 is the master drive mechanism, the first optical mirror 1 is the slave mechanism, the speed ratio of the first optical mirror 1 to the second optical mirror 22 is 1:1.4; the outer frame dimensions of the inner and outer fixing plates 6 and 7 are 127 mm × 142 mm; and the aperture of the entire motion mechanism is 60 mm.

[0062] The incident direction of the light is perpendicular to the reflecting surface of the optical second mirror 2, and is reflected by the reflecting surface. The reciprocating force is applied to the second mirror base 5. The second mirror base 5 performs planar motion under the action of the reciprocating driving force. The direction of the driving force is the direction of the line connecting the centers of the first group of second mirror springs 91 and the second group of second mirror springs 92. The second mirror base 5 drives the optical second mirror 2 to perform planar motion, causing the first group of second mirror springs 91 and the second group of second mirror springs 92 to produce elastic bending deformation. Through the connection between the first inner fixing plate 61 and the first outer fixing plate 71, the first group of first mirror springs 81 also produces elastic bending deformation. Through the connection between the second inner fixing plate 62 and the second outer fixing plate 72, the second group of first mirror springs 82 also produces elastic bending deformation, driving the optical first mirror 1 to perform planar motion in the opposite direction to the optical second mirror 2, that is, the optical first mirror 1 and the optical second mirror 2 perform reciprocating motion in opposite directions according to the set speed ratio. At this time, the structural dimensions of the first inner fixing plate 61, the first outer fixing plate 71, the second inner fixing plate 62 and the first outer fixing plate 71, the position of the first fixing plate 101 in the first groove 60 and the position of the second fixing plate 102 in the second groove 70 jointly determine the movement speed ratio of the optical mirror 1 and the optical mirror 2.

[0063] When the optical mirror 2 performs planar motion, its reflective surface shifts along the direction of the central beam (i.e., when the optical mirror 1 and the optical mirror 2 simultaneously approach each other), resulting in an optical path difference. The optical path of the central beam is greater than the optical path of the oblique beam (i.e., the optical path of the oblique field of view is smaller than the optical path of the central field of view). When the optical mirror 2 and the optical mirror 2 perform planar motion in opposite directions (i.e., when the optical mirror 1 and the optical mirror 2 simultaneously move away from each other), an optical path difference also occurs. The change in the optical path of the oblique field of view is greater than the change in the optical path of the central field of view. By designing the structural dimensions and motion speed ratio of the optical mirrors 1 and 2, the optical path difference between the oblique field of view beam and the central field of view beam can be made equal during motion. The motion distance of the optical mirrors 1 and 2 is designed to achieve the required spectral resolution under the desired field of view.

[0064] During planar motion of the second optical mirror 2, when the first optical mirror 1 and the second optical mirror 2 simultaneously move away from each other, the thickness of the optical element decreases, shortening the optical path. When the first optical mirror 1 and the second optical mirror 2 simultaneously move toward each other, the thickness of the optical element increases, increasing the optical path. During this process, the optical path of the light beam in the optical medium changes. This optical path change is related to the field of view angle of the incident light beam, with the optical path change of the oblique beam being greater than that of the central beam. Therefore, during the optical path difference generated by the reflective surface of the second optical mirror 2, the amount of optical path difference caused by beam broadening, which is less than that of the central beam, is compensated. During motion, this structure ensures that the optical surfaces of the first optical mirror 1 and the second optical mirror 2 have excellent translational characteristics, guaranteeing interference performance.

[0065] The size of the driving force can control the distance that the optical second mirror 2 moves; by designing the size of the optical elements in the optical second mirror 2 and the optical first mirror 1, the speed ratio of the movement and the distance, the optical path of all light beams can be made consistent, thereby achieving the spectral resolution reflected by the cumulative effect of the optical path difference of all light beams in a field of view meeting the requirements and the consistency of the spectral center wave number.

[0066] The motion mechanism of Example 1, which implements a method for generating optical path differences for large-field-of-view (FOV) and high-spectral-resolution detection, overcomes the limitations imposed by FOV on spectral resolution, meeting the requirements for both a large FOV and high spectral resolution. It is used in infrared hyperspectral atmospheric sounders. This instrument enables large-scale, all-day, long-term, and continuous monitoring of Earth's atmosphere, oceans, and terrestrial ecosystems, enabling better understanding of the spatiotemporal distribution and variation of global climate.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0069] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A motion mechanism for realizing a method for generating an optical path difference for detection with a large field of view and high spectral resolution, characterized in that: The motion mechanism comprises an optical first mirror (1), an optical second mirror (2), a first mirror base (3), a second mirror base (5), a first group of first mirror springs (81) and second mirror springs (91), and a second group of first mirror springs (82) and second mirror springs (92), wherein corresponding positions of the first inner fixing plate (61) and the first outer fixing plate (71) are each provided with an inner concave portion, and the two inner concave portions together form a first groove (60), a fixed end of the first group of first mirror springs (81) is connected to the same mirror base (3), and the first group of first mirror springs (81) is connected to the second mirror base (5). An inner fixing plate (61) and a first outer fixing plate (71) are clamped, a movable end of a mirror spring (81) of the first group is connected to the first fixing plate (101) located in the first groove (60), a fixed end of a second mirror spring (91) of the first group is connected to the second mirror base (5), the movable end of the second mirror spring (91) of the first group is clamped by the first inner fixing plate (61) and the first outer fixing plate (71), and the mirror spring (81) of the first group, the first inner fixing plate (61) and the second mirror spring (91) of the first group form a first spring connecting rod; The second inner fixing plate (62) and the second outer fixing plate (72) are each provided with an inner concave portion at corresponding positions, and the two inner concave portions together form a second groove (70); the fixed end of the first mirror spring (82) of the second group is connected to the mirror seat (3); the first mirror spring (82) of the second group is clamped by the second inner fixing plate (62) and the second outer fixing plate (72); the movable end of the first mirror spring (82) of the second group is connected to the second fixing plate (102) located in the second groove (70); the fixed end of the second mirror spring (92) of the second group is connected to the mirror seat (5); the movable ends of the second mirror spring (92) of the second group are clamped by the second inner fixing plate (62) and the second outer fixing plate (72); the first mirror spring (82) of the second group, the second inner fixing plate (62) and the second mirror spring (92) of the second group form a second spring connecting rod; The first groove (60) and the second groove (70) are positioned correspondingly; When the two-mirror base (5) moves with the optical second mirror (2) in a plane, the first spring link uses the first fixed plate (101) as a fulcrum, and the second spring link uses the second fixed plate (102) as a fulcrum. The first spring link and the second spring link rotate in the same direction in the plane and drive the one-mirror base (3) and the optical first mirror (1) to move in the opposite direction to the optical second mirror (2). The first optical mirror (1) and the second optical mirror (2) are both wedge mirrors, and the first inclined surface of the first optical mirror (1) and the second inclined surface of the second optical mirror (2) are opposite to each other.

2. The motion mechanism for realizing a method for generating an optical path difference for detection with a large field of view and high spectral resolution according to claim 1, characterized in that: The motion mechanism further comprises a first clamping plate (41), a second clamping plate (42), a third clamping plate (43) and a fourth clamping plate (44); a fixed end of a mirror spring (81) of the first group is fixed between the first clamping plate (41) and the mirror seat (3) by means of screws; a fixed end of a second mirror spring (91) of the first group is fixed between the second clamping plate (42) and the mirror seat (5) by means of screws; a fixed end of a mirror spring (82) of the second group is fixed between the third clamping plate (43) and the mirror seat (3) by means of screws; and a fixed end of a second mirror spring (92) of the second group is fixed between the fourth clamping plate (44) and the mirror seat (5) by means of screws.

3. The motion mechanism for realizing a method for generating an optical path difference for detection with a large field of view and high spectral resolution according to claim 2, characterized in that: One end of the first mirror base (3) corresponding to the first clamping plate (41) is the first end, and the lower surface of the first end is flush with the lower edge of the first clamping plate (41); one end of the second mirror base (5) corresponding to the second clamping plate (42) is the second end, and the upper surface of the second end is flush with the upper edge of the second clamping plate (42); one end of the first mirror base (3) corresponding to the third clamping plate (43) is the third end, and the lower surface of the third end is flush with the lower edge of the third clamping plate (43); one end of the second mirror base (5) corresponding to the fourth clamping plate (44) is the fourth end, and the upper surface of the fourth end is flush with the upper edge of the fourth clamping plate (44).

4. A motion mechanism for realizing a method for generating an optical path difference for detection with a large field of view and high spectral resolution according to claim 1, 2 or 3, characterized in that: A first distance is set between the lower surface of the first mirror base (3) and the upper surface of the first inner fixing plate (61), a second distance is set between the lower surface of the first mirror base (3) and the upper surface of the second inner fixing plate (62), and the first distance and the second distance are equal; a third distance is set between the upper surface of the second mirror base (5) and the lower surface of the first inner fixing plate (61), a fourth distance is set between the upper surface of the second mirror base (5) and the lower surface of the second inner fixing plate (62), and the third distance and the fourth distance are equal; The outer frame dimensions of the first inner fixing plate (61), the first outer fixing plate (71), the second inner fixing plate (62), and the second outer fixing plate (72) are all the same; The distance between the upper edge of the first fixing plate (101) and the upper surface of the first groove (60) is equal to the distance between the upper edge of the second fixing plate (102) and the upper surface of the second groove (70).

5. The motion mechanism for realizing the method for generating optical path difference for detection with large field of view and high spectral resolution according to claim 4, characterized in that: The first mirror base (3) and the second mirror base (5) are two square plates or circular frames of the same size.

6. The motion mechanism for realizing a method for generating an optical path difference for detection with a large field of view and high spectral resolution according to claim 5, characterized in that: The first mirror spring (81) and the second mirror spring (91) of the first group, and the first mirror spring (82) and the second mirror spring (92) of the second group all use spring sheets, and the spring sheets are made of beryllium bronze material; The first mirror base (3), the second mirror base (5), the first clamping plate (41), the second clamping plate (42), the third clamping plate (43), the fourth clamping plate (44), the first inner fixing plate (61), the first outer fixing plate (71), the second inner fixing plate (62), and the second outer fixing plate (72) are all made of metal aluminum material.

7. The motion mechanism for realizing the method for generating optical path difference for detection with large field of view and high spectral resolution according to claim 6, characterized in that: A line connecting the centers of the two mirror springs (91) of the first group and the centers of the two mirror springs (92) of the second group forms a second straight line, and a line connecting the center of the one mirror spring (81) of the first group and the center of the one mirror spring (82) of the second group forms a first straight line, the first straight line and the second straight line are parallel, and the two form a reference plane; The plane motion of the two-mirror base (5) carrying the optical two mirrors (2) refers to the motion of the optical two mirrors (2) in a plane parallel to the reference plane; the plane motion of the one-mirror base (3) carrying the optical one mirror (1) refers to the motion of the optical one mirror (1) in a plane parallel to the reference plane.

8. The motion mechanism for realizing the method for generating optical path difference for detection with large field of view and high spectral resolution according to claim 7, characterized in that The first optical mirror (1) is rotated 180° clockwise and then placed in the same direction as the second optical mirror (2); The first inclined surface of the optical first mirror (1) is parallel to the reference plane, and the second inclined surface of the optical second mirror (2) is parallel to the reference plane.

9. The motion mechanism for realizing the method for generating optical path difference for detection with large field of view and high spectral resolution according to claim 8, characterized in that: The optical first mirror (1) is connected to the first mirror base (3) via a first Z-shaped plate (12), the optical second mirror (2) is connected to the second mirror base (5) via a second Z-shaped plate (22), and the center of gravity of the motion mechanism is balanced to above the geometric center of the second mirror base (5).

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