An adjustable filter optical structure and a spectrum analyzer having the structure

Abstract

The present invention discloses an adjustable filter optical structure and a spectrum analyzer having the structure, and the present invention relates to the field of optical structure technology. The adjustable filter optical structure and the spectrum analyzer having the structure include an adjustment box, an adjustment mechanism is arranged in the adjustment box, the adjustment mechanism includes an inner cylinder located in the adjustment box, conductive sheets are arranged in an array at the center of the outer side of the inner cylinder, each conductive sheet is provided with an abutment groove, and the left and right ends of each conductive sheet abut against the adjacent conductive sheets, and the upper end of each abutment groove is provided with a conductive part, and each conductive part is provided with a telescopic rod, and each telescopic rod is provided with a magnetic rod at the top. The present invention realizes the integration of photoelectric, thermal optical, mechanical and magnetic field tuning methods, so that in the actual use of the spectrum analyzer, the wavelength of the projected light is adjusted, and the corresponding adjustment method is selected according to the material and characteristics of the filter, thereby expanding the range of adjustment and improving the convenience of the actual use of the spectrum analyzer.

Description

Technical Field

[0001] The invention relates to the technical field of optical structures, in particular to an adjustable filter optical structure and a spectrum analyzer having the structure. Background Art

[0002] A tunable filter is an optical element that can adjust the wavelength range of light transmission as needed. It usually consists of a series of coated mirrors mounted on a MEMS (micro-electromechanical system) component. The light transmission characteristics of the filter are adjusted by controlling the voltage change applied to the mirrors. The working principle of the tunable filter is based on the Fabry-Perot optical cavity principle. When the frequency of the incident light meets its resonance condition, the transmission spectrum of the filter will have a very high peak, corresponding to a very high transmittance. By changing the distance between the upper and lower mirrors in the filter, the wavelength range of transmission can be precisely controlled, thereby achieving selective transmission of light of different wavelengths.

[0003] At present, the adjustable filter realizes the adjustable wavelength of the output light by setting a spacer layer on the substrate and coating different film layers. The structure is complex and the cost is high. For example, the Chinese invention publication number CN101299075B discloses an adjustable filter optical structure and a spectrum analyzer having the structure. The adjustable filter optical mechanism uses the thermo-optic effect, electro-optic effect or mechanical rotation to change the arm length of the standard tool to achieve the adjustable wavelength of the transmitted light in a wide wavelength range. It is made according to the principle of Michelson interferometer and has the characteristics of simple structure, small size and low manufacturing cost.

[0004] The above-mentioned method of changing the arm length of the etalon through the thermo-optic effect, photoelectric effect and mechanical rotation drive realizes the adjustability of the projected light wave in a wide wavelength range. The thermo-optic effect, photoelectric effect and mechanical rotation structure are difficult to combine in the spectrometer. In the above-mentioned application, three methods are specifically used, such as "a composite integral interference block composed of two reflective optical elements and one beam-splitting optical element bonded or glued on a fixed bracket with a through hole", "an optical element is provided at the vertical part of the "cross"-shaped cavity of the fixed bracket C near the reflective optical element G, and the optical element is an electro-optical crystal, a thermo-optical crystal or a similar crystal, which is provided on one arm of the etalon" and "a ball joint composed of an upper hemisphere H and a lower hemisphere I is provided between the upper surface of the reflective optical element G and the lower surface of the fixed bracket C", which all reflect that the spectrometer needs an adhesion or connection linkage structure during actual use, so it is difficult to achieve the integration and unification of various adjustable structures of the filter during actual use. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an adjustable filter optical structure and a spectrum analyzer having the structure, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an optical structure of an adjustable filter and a spectrum analyzer having the structure, comprising an adjustment box, an adjustment mechanism for filter tuning is arranged in the adjustment box, and an optical dispersion prism for receiving incident parallel light is arranged on one side of the adjustment box, the incident parallel light enters the optical dispersion prism to decompose the complex light into multiple light beams of different wavelengths, the tuning of the filter is to change the wavelength of the output light, and a focusing system connected to the spectrum analyzer, i.e., a focusing element, is arranged on the other side of the adjustment box;

[0007] According to the above, the wavelength of the output light of the optical dispersion prism is changed to tune the wavelength of the output light. The adjustment mechanism includes an inner cylinder located in the adjustment box, and conductive sheets are arranged in an array at the center of the outer side of the inner cylinder. The conductive sheets have the characteristics of conducting magnetism, current and temperature. Each conductive sheet is provided with an abutment groove. The left and right ends of each conductive sheet abut against the adjacent conductive sheets, and the abutment effect is replaced by a clamping method, so as to finally achieve the closure of the inner cylinder. A conductive member is provided at the upper end of each abutment groove. The characteristics of the conductive member are the same as those of the conductive sheet mentioned above. Each conductive member is provided with a telescopic rod 1 thereon. In the present application, the telescopic rod is pre-shaped as an elastic curling layer with a memory function smaller than the outer diameter of the rod body, and has a self-tightening function. The telescopic end is telescopic within the formed range. A magnetic rod is provided at the top of each telescopic rod 1. Therefore, after the telescopic rod 1 is extended, the conductive member connected to the other end reaches the abutment groove, and the conductive sheet is firmly attached to the inner cylinder and the conductive sheet.

[0008] A further improvement of the technical solution of the present invention is that in order to integrate the photoelectric effect, the thermo-optical effect and the magnetic field effect, a corresponding electromagnetic coil is fixedly installed on each of the magnetic rods. The electromagnetic coil generates magnetism due to its own characteristics after being energized. The material of the magnetic rod is an electromagnet, so the magnetic rod generates a magnetic field and magnetism of a certain intensity. A sleeve wheel is installed on the magnetic rod to limit the position, and an adjustable tight belt is installed between two adjacent sleeve wheels to limit the position. The position of the magnetic rod in the adjustment slot is changed by adjusting the length of the tight belt, and finally the position of the conductive part in the inner cylinder and the conductive sheet is changed. Because the position of the optical dispersion prism in the inner cylinder is fixed, the intensity of the magnetic field can be It is possible to achieve artificial control, one end of each magnetic rod away from the corresponding abutment groove is connected to an external wire, the wire is connected to an external current, and the electric field strength changes after the current is applied. Tuning is completed on a filter with a photoelectric effect material such as ceramic, and each of the magnetic rods is respectively located in an adjustment slot of a placement rack. Therefore, the present application is based on the photoelectric effect and the thermo-optical effect, and at the same time, changes the refraction wavelength of the optical dispersion prism by changing the magnetic field strength near the optical dispersion prism. Therefore, the present invention adds an adjustment method for changing or applying the magnetic field strength to the filter tuning method. Furthermore, this tuning method is suitable for the filter material with magneto-optical effect.

[0009] A further improvement of the technical solution of the present invention is that: in order to ensure the closedness and stability of the placement rack, the two ends of adjacent placement racks are abutted against each other to form a polygonal structure, the inner cylinder is located in the formed polygonal structure, and the length of the composite light collimated by the optical collimator as parallel light incident on the optical dispersion prism is the incident distance L. The lengths of the inner cylinder and the placement rack are both greater than the incident distance, forming a closed structure for the incident light beam to avoid the diffraction of the incident light.

[0010] A further improvement of the technical solution of the present invention is that each of the conductive sheets is provided with a heating tube and a pressurizing component. During the heating process of the heating tube, the gas in the closed space of the conductive sheet close to the transmission pipeline gradually becomes high-temperature gas, and the pressurizing component finally pushes the high-temperature gas. The end face of each conductive sheet close to the optical dispersion prism can be detachably connected to the transmission pipeline. After the transmission pipeline receives the high-temperature gas, in order to prevent the high-temperature gas from escaping, the end of the transmission pipeline away from the conductive sheet is connected to the hollow conductive extension plate through a seal. The end of the conductive extension plate close to the optical dispersion prism is fixedly installed with a telescopic rod 2, and the other end of the telescopic rod 2 is fixedly connected to an airbag. The airbag is bonded to the optical dispersion prism through an organic high-temperature resistant glue. In summary, the telescopic rod 2 is internally provided A hollow channel is placed, and high-temperature gas gradually enters the interior of the airbag, and the airbag gradually diffuses and expands. Because the airbag is in contact with the optical dispersion prism, the optical dispersion prism is evenly heated, and the thermal field of the optical dispersion prism changes evenly, thereby completing the tuning of the filter. Furthermore, this tuning method is suitable for the material of the filter to have a thermo-optical effect. Therefore, the integration of multiple tuning methods of the filter such as photoelectric, thermo-optical, mechanical and magnetic fields is realized in the spectrum analyzer through the adjustment mechanism. Therefore, in the actual use of the spectrum analyzer, the wavelength of the projected light is adjusted, and the corresponding adjustment method is selected according to the material and characteristics of the filter, thereby avoiding the need to disassemble and reassemble the dispersion element of the spectrum analyzer. The user can choose an adjustment according to his own needs, thereby expanding the range of adjustment and improving the convenience of the actual use of the spectrum analyzer.

[0011] A further improvement of the technical solution of the present invention is that: an articulated seat is provided at one end of the optical dispersion prism, the articulated seat is welded to the inner wall of the inner cylinder, the articulated seat is hinged to one side of the optical dispersion prism through a hinge shaft, and a connecting plate with a threaded groove inside is provided on the other side of the optical dispersion prism, the connecting plate is located in the slide groove of the inner cylinder, an adjusting screw is threadedly connected to the connecting plate, and the adjusting screw is connected to a stepping motor through a coupling, wherein the adjusting screw rotates during the driving process of the stepping motor, and the connected connecting plate moves due to the threaded connection, so that the angle between the optical dispersion prism and the parallel incident parallel light changes, and a mechanical adjustment structure is further added based on the conditions of photoelectric, thermal light and magnetic field to achieve mechanical tuning of the filter, and the stepping motor is fixedly mounted on the inner wall of the inner cylinder.

[0012] A further improvement of the technical solution of the present invention is that in order to ensure the ductility and conductivity of the conductive sheet and the conductive member, the conductive sheet and the conductive member are both made of aluminum alloy.

[0013] A further improvement of the technical solution of the present invention is that the optical spectrum analyzer includes a collimating element, a dispersive element and a focusing element, and the adjustment box is located in a closed shell of the dispersive element.

[0014] A further improvement of the technical solution of the present invention is that: the closed shell is provided with a connection hole for connection, the connection hole is covered with a conductive film, each of the conductive films is connected to an electrode, in which the conductive film is connected to an external wire at one end of the magnetic rod away from the corresponding abutment groove, and after voltage is applied to the electrode, current is transmitted to the regulating mechanism.

[0015] A further improvement of the technical solution of the present invention is that the incident channel of the collimating element is connected to the closed shell of the dispersive element, and the incident channel is parallel to the inner cylinder.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the integration of multiple tuning methods of the filter, such as photoelectric, thermal-optical, mechanical and magnetic field, is realized in the spectrum analyzer through the adjustment mechanism. Therefore, when adjusting the wavelength of the projected light during the actual use of the spectrum analyzer, the corresponding adjustment method is selected according to the material and characteristics of the filter, thereby avoiding the need to disassemble and reassemble the dispersion element of the spectrum analyzer. The user can select one adjustment according to his own needs, thereby expanding the adjustment range and improving the convenience of the actual use of the spectrum analyzer.

[0017] The high-temperature gas gradually enters the airbag, and the airbag gradually diffuses and expands. Because the airbag is in contact with the optical dispersion prism, the optical dispersion prism is evenly heated, and the thermal field of the optical dispersion prism changes evenly, completing the tuning of the filter with thermo-optical effect material;

[0018] The electric field strength changes after the current is applied by connecting the external current through the wire, and the tuning is completed on the filter with photoelectric effect material such as ceramics. And by changing the magnetic field strength near the optical dispersion prism, the refraction wavelength of the optical dispersion prism is changed to achieve the tuning of the filter;

[0019] By adjusting the rotation of the screw during the driving process by a stepper motor, the connecting plate connected due to the threaded connection moves, the angle between the optical dispersion prism and the parallel incident parallel light changes, and a mechanical adjustment structure is further added based on the conditions of photoelectric, thermal light and magnetic field to achieve mechanical tuning of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A cross-sectional view of a spectrum analyzer having an optical structure with a tunable filter;

[0021] Figure 2 It is a schematic diagram of an enlarged dispersion element in the optical structure of a tunable filter;

[0022] Figure 3 It is a front view of a dispersion element in the optical structure of a tunable filter;

[0023] Figure 4 It is a structural schematic diagram of the left viewing angle of the adjustment mechanism in the optical structure of the adjustable filter;

[0024] Figure 5 It is a structural schematic diagram of the right viewing angle of the adjustment mechanism in the optical structure of the adjustable filter;

[0025] Figure 6 It is a structural diagram of the adjustment mechanism part in the optical structure of the adjustable filter;

[0026] Figure 7 Schematic diagram of an optical dispersion prism receiving incident parallel light;

[0027] Figure 8 Schematic diagram of the optical dispersion prism transmitting light in an electric field environment in Example 1;

[0028] Fig. 9 FIG. 1 is a schematic diagram of light transmitted by the optical dispersion prism under a magnetic field intensity B in Example 1.

[0029] In the figure: 200, adjustment box; 300, optical dispersion prism; 401, inner cylinder; 402, conductive sheet; 403, abutment groove; 404, conductive member; 405, telescopic rod one; 406, magnetic rod; 407, electromagnetic coil; 408, sleeve wheel; 409, tight belt; 410, placement rack; 411, adjustment groove; 412, transmission pipeline; 413, sealing member; 414, conductive extension plate; 415, telescopic rod two; 416, airbag; 417, hinge seat; 418, hinge shaft; 419, connecting plate; 420, adjusting screw; 421, stepping motor; 500, collimating element; 600, dispersion element; 700, focusing element; 601, closed shell; 602, conductive film; 603, electrode. DETAILED DESCRIPTION

[0030] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0031] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0032] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific examples below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0033] Reference Figure 1 - Fig. 9 , the present invention provides three technical solutions:

[0034] Embodiment 1, the present invention provides an optical structure of an adjustable filter, including an adjustment box 200, wherein an adjustment mechanism for tuning the filter is arranged inside the adjustment box 200, and an optical dispersion prism 300 for receiving incident parallel light is arranged on one side inside the adjustment box 200, and the incident parallel light enters the optical dispersion prism 300 to decompose the complex light into multiple light beams of different wavelengths, and the tuning of the filter is to change the wavelength of the output light, and a focusing system connected to a spectrum analyzer, namely a focusing element 700, is arranged on the other side inside the adjustment box 200;

[0035] According to the above, the wavelength of the output light of the optical dispersion prism 300 is changed to complete the tuning of the wavelength of the output light. The adjustment mechanism includes an inner cylinder 401 located in the adjustment box 200. The conductive sheets 402 are arranged in an array at the center of the outer side of the inner cylinder 401. The conductive sheets 402 have the characteristics of conducting magnetism, current and temperature. Each conductive sheet 402 is provided with an abutment groove 403. The left and right ends of each conductive sheet 402 are abutted against the adjacent conductive sheets 402. The clamping method is used to replace the abutment effect, and finally the inner cylinder 401 is closed. The upper end of each abutment groove 403 is A conductive member 404 is provided, and the characteristics of the conductive member 404 are the same as those of the conductive sheet 402 mentioned above. A telescopic rod 405 is provided on each conductive member 404. In the present application, the telescopic rod is pre-shaped as an elastic curling layer with a memory function that is smaller than the outer diameter of the rod body, and has a self-tightening function. The telescopic end is telescoped within the formed range. A magnetic rod 406 is provided on the top of each telescopic rod 405. Therefore, after the telescopic rod 405 is extended, the conductive member 404 connected to the other end reaches the abutment groove 403, and the conductive sheet 402 is firmly attached to the inner tube 401 and the conductive sheet 402.

[0036] In order to integrate the photoelectric effect, the thermo-optical effect and the magnetic field effect, a corresponding electromagnetic coil 407 is fixedly installed on each magnetic rod 406. The electromagnetic coil 407 generates magnetism due to its own characteristics after being energized. The material of the magnetic rod 406 is selected as an electromagnet, so the magnetic rod 406 generates a magnetic field and magnetism of a certain intensity. A sleeve wheel 408 is installed on the magnetic rod 406 to limit the position. An adjustable tight belt 409 is sleeved between two adjacent sleeve wheels 408. The position of the magnetic rod 406 in the adjustment groove 411 is changed by adjusting the length of the tight belt 409, and finally the position of the conductive member 404 in the inner cylinder 401 and the conductive sheet 402 is changed. Because the position of the optical dispersion prism 300 in the inner cylinder 401 is fixed, the intensity of the magnetic field can be controlled artificially. The end of each magnetic rod 406 away from the corresponding abutment groove 403 is connected to an external wire, and the wire is connected to an external current. After the current is applied, the electric field intensity changes. In the case of a material with a photoelectric effect such as ceramic The tuning is completed on the filter of the porcelain, and each magnetic rod 406 is respectively located in the adjustment slot 411 of a placement rack 410. Therefore, the present application is based on the photoelectric effect and the thermo-optical effect. At the same time, by changing the magnetic field strength near the optical dispersion prism 300, the refraction wavelength of the optical dispersion prism 300 is changed. Therefore, the present invention adds an adjustment method of changing or applying the magnetic field strength to the filter tuning method. Further, this tuning method is suitable for the material of the filter to have a magneto-optical effect; therefore, the present application realizes the integration of multiple tuning methods of the filter photoelectric, thermo-optical, mechanical and magnetic fields in the spectrum analyzer through the adjustment mechanism. Therefore, in the actual use of the spectrum analyzer, the wavelength of the projected light is adjusted. The corresponding adjustment method is selected according to the material and characteristics of the filter, which avoids the need to disassemble and reassemble the dispersion element 600 of the spectrum analyzer. The user can choose one adjustment according to his own needs, expand the range of adjustment and improve the convenience of actual use of the spectrum analyzer.

[0037] Embodiment 2, on the basis of embodiment 1, in order to ensure the closedness and stability of the placement rack 410, the two ends of adjacent placement racks 410 are connected to each other to form a polygonal structure, and the inner cylinder 401 is located in the formed polygonal structure. The length of the composite light collimated by the optical collimator as parallel light incident on the optical dispersion prism 300 is the incident distance L1, and the lengths of the inner cylinder 401 and the placement rack 410 are both greater than the incident distance, forming a closed structure for the incident light beam to avoid the diffraction of the incident light.

[0038] Each conductive sheet 402 is provided with a heating tube and a pressurizing component. During the heating process of the heating tube, the gas in the closed space of the conductive sheet 402 close to the transmission pipe 412 gradually becomes high-temperature gas, and the pressurizing component finally pushes the high-temperature gas. The end face of each conductive sheet 402 close to the optical dispersion prism 300 can be detachably connected to the transmission pipe 412. After the transmission pipe 412 receives the high-temperature gas, in order to prevent the high-temperature gas from escaping, the end of the transmission pipe 412 away from the conductive sheet 402 is connected to the hollow conductive extension plate 414 through a sealing member 413. The conductive extension plate 414 is close to the optical dispersion prism 300. One end of the telescopic rod 415 is fixedly installed, and the other end of the telescopic rod 415 is fixedly connected to the airbag 416. The airbag 416 is bonded to the optical dispersion prism 300 through an organic high-temperature resistant glue. As is known from the above, the telescopic rod 415 is internally provided with a hollow channel, and the high-temperature gas gradually enters the airbag 416, and the airbag 416 gradually diffuses and expands. Because the airbag 416 is in contact with the optical dispersion prism 300, the optical dispersion prism 300 is heated evenly, and the thermal field of the optical dispersion prism 300 is evenly changed, thereby completing the tuning of the filter. Furthermore, this tuning method is suitable for the material of the filter having a thermo-optical effect.

[0039] Embodiment 3, on the basis of embodiment 1 and embodiment 2, wherein an articulated seat 417 is provided at one end of the optical dispersion prism 300, the articulated seat 417 is welded to the inner wall of the inner cylinder 401, the articulated seat 417 is hinged to one side of the optical dispersion prism 300 through a hinge shaft 418, and a connecting plate 419 with a threaded groove provided inside is provided on the other side of the optical dispersion prism 300, the connecting plate 419 is located in the slide groove of the inner cylinder 401, an adjusting screw 420 is threadedly connected to the connecting plate 419, and the adjusting screw 420 is connected to a stepping motor 421 through a coupling, wherein the adjusting screw 420 rotates during the driving process of the stepping motor 421, and the connected connecting plate 419 moves due to the threaded connection, so that the angle between the optical dispersion prism 300 and the parallel incident parallel light changes, and a mechanical adjustment structure is further added based on the conditions of photoelectric, thermal light and magnetic field to achieve mechanical tuning of the filter, and the stepping motor 421 is fixedly mounted on the inner wall of the inner cylinder 401.

[0040] In order to ensure the ductility and conductivity of the conductive sheet 402 and the conductive member 404 , the conductive sheet 402 and the conductive member 404 are both made of aluminum alloy.

[0041] The present invention further provides a spectrum analyzer with an adjustable filter optical structure, comprising a collimating element 500 , a dispersive element 600 and a focusing element 700 , wherein the adjustment box 200 is located in a closed housing 601 of the dispersive element 600 .

[0042] The closed shell 601 is provided with a connection hole for connection, and the connection hole is covered with a conductive film 602. Each conductive film 602 is connected to an electrode 603. In the above, the conductive film 602 is connected to an external wire at one end of the magnetic rod 406 away from the corresponding abutment groove 403. After the voltage is applied to the electrode 603, the current is transmitted to the regulating mechanism.

[0043] The incident channel of the collimating element 500 is connected to the closed shell 601 of the dispersing element 600 , and the incident channel is parallel to the inner cylinder 401 .

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical structure of an adjustable filter, characterized in that: Comprising an adjustment box (200), wherein an adjustment mechanism for tuning a filter is arranged inside the adjustment box (200), an optical dispersion prism (300) for receiving incident parallel light is arranged on one side inside the adjustment box (200), and a focusing system connected to a spectrum analyzer is arranged on the other side inside the adjustment box (200); The regulating mechanism comprises an inner cylinder (401) located in the regulating box (200), conductive plates (402) are arranged in an array at the center of a circle on the outer side of the inner cylinder (401), each conductive plate (402) is provided with an abutment groove (403), the left and right ends of each conductive plate (402) abut against the adjacent conductive plates (402), a conductive member (404) is provided at the upper end of each abutment groove (403), each conductive member (404) is provided with a telescopic rod (405) thereon, and a magnetic rod (406) is provided at the top of each telescopic rod (405); Each of the conductive sheets (402) is provided with a heating tube and a pressurizing component therein, and the end surface of each of the conductive sheets (402) close to the optical dispersion prism (300) can be detachably connected to a transmission pipe (412), one end of the transmission pipe (412) away from the conductive sheet (402) is connected to a hollow conductive extension plate (414) via a sealing member (413), one end of the conductive extension plate (414) close to the optical dispersion prism (300) is fixedly mounted with a second telescopic rod (415), the other end of the second telescopic rod (415) is fixedly connected to an airbag (416), and the airbag (416) is bonded to the optical dispersion prism (300) via an organic high temperature resistant adhesive; A hinge seat (417) is provided at one end of the optical dispersion prism (300), the hinge seat (417) is welded to the inner wall of the inner cylinder (401), the hinge seat (417) is hinged to one side of the optical dispersion prism (300) via a hinge shaft (418), and a connecting plate (419) with a threaded groove provided inside is provided at the other side of the optical dispersion prism (300), the connecting plate (419) is located in the slide groove of the inner cylinder (401), an adjusting screw (420) is threadedly connected to the connecting plate (419), the adjusting screw (420) is connected to a stepping motor (421) via a coupling, and the stepping motor (421) is fixedly mounted on the inner wall of the inner cylinder (401).

2. The tunable filter optical structure according to claim 1, characterized in that: A corresponding electromagnetic coil (407) is fixedly mounted on each magnetic rod (406), a sleeve wheel (408) is limitedly mounted on each magnetic rod (406), an adjustable tight belt (409) is limitedly sleeved between two adjacent sleeve wheels (408), one end of each magnetic rod (406) away from the corresponding abutment groove (403) is connected to an external wire, and each magnetic rod (406) is respectively located in an adjustment groove (411) of a placement rack (410).

3. The tunable filter optical structure according to claim 2, characterized in that: Two ends of adjacent placement racks (410) are abutted against each other to form a polygonal structure, the inner cylinder (401) is located in the formed polygonal structure, the length of the composite light collimated by the optical collimator into parallel light incident on the optical dispersion prism (300) is the incident distance L1, and the lengths of the inner cylinder (401) and the placement rack (410) are both greater than the incident distance.

4. The tunable filter optical structure according to claim 1, characterized in that: The conductive sheet (402) and the conductive member (404) are both made of aluminum alloy.

5. A spectrum analyzer with an adjustable filter optical structure, applied to the adjustable filter optical structure according to any one of claims 1 to 4, characterized in that: The optical spectrum analyzer comprises a collimating element (500), a dispersive element (600) and a focusing element (700), and the adjustment box (200) is located in a closed shell (601) of the dispersive element (600).

6. The tunable filter optical structure according to claim 5, characterized in that: The closed shell (601) is provided with a connection hole for connection, the connection hole is covered with a conductive film (602), and each conductive film (602) is connected to an electrode (603).

7. The tunable filter optical structure according to claim 5, characterized in that: The incident channel of the collimating element (500) is connected to the closed shell (601) of the dispersive element (600), and the incident channel is parallel to the inner cylinder (401).

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