CN115985172A - Multifunctional experiment platform for measuring magneto-optical effect - Google Patents
Multifunctional experiment platform for measuring magneto-optical effect Download PDFInfo
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- CN115985172A CN115985172A CN202310276651.2A CN202310276651A CN115985172A CN 115985172 A CN115985172 A CN 115985172A CN 202310276651 A CN202310276651 A CN 202310276651A CN 115985172 A CN115985172 A CN 115985172A
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Abstract
The invention discloses a multifunctional experiment platform for measuring magneto-optical effect, which comprises a controller, a sample magnetic device, a linearly polarized light rotating emitter and a polarized light rotating detector, wherein the linearly polarized light rotating emitter and the polarized light rotating detector are positioned at two sides of the sample magnetic device; the linearly polarized light rotating emitter, the polarized light rotating detector and the sample magnetic device can test the magneto-optical Kerr effect, the Faraday magneto-optical rotation effect and the magneto-birefringence effect of the magneto-optical effect by flexible arrangement, and the experimental cost of the multi-branch effect of the magneto-optical effect is greatly reduced.
Description
Technical Field
The invention relates to the field of magneto-optical effect measurement, in particular to a multifunctional experiment platform for measuring magneto-optical effect.
Background
The magneto-optical effect includes various branch effects, mainly including magneto-optical kerr effect, faraday magneto-optical rotation effect, and koton-mooton magneto-birefringence effect. In the teaching, scientific research and test of the magneto-optical effect, the test of each branch effect of the magneto-optical effect generally adopts one branch effect to form a system or an instrument, and a corresponding light source end, a sample end and a test end are deployed, so that an effective unified test platform cannot be formed for the three effects of the magneto-optical effect, and meanwhile, the following problems exist in the test:
the polarized light emission source usually generates polarized light by a laser and a polarized light filtering device, the orientation of the polarization plane of the polarized light needs to be changed by adjusting the angle of the filtering device at the front end of the laser, the light emitting source deployment and modulation process is complicated, and a modulatable emission unit which directly generates the polarized light and can modulate and transmit the polarized light in the light transmission direction is not provided;
in the process of modulation and calibration of the optimal observation angle of the observed polarized light, the optimal radial observation angle of the polarized light is usually obtained only by adjusting the radial rotation angle of the test end, and the mode greatly limits the modulation and observation flexibility of a light path and the experimental frequency capability of irradiating a sample by using linearly polarized light with different polarization surfaces;
in the magneto-optical effect observation process, the required magnetic field size of each branch effect magnetic sample is different, the required magnetic field direction is different, in the observation experiment of adopting solenoid to have or not the iron core to control the magnetic field size, the iron core has or not, the position, the angle mostly adopt manual selection to abandon, do not have adjustable control position, angle, the iron core has or not, and the integration equipment of magnetic distance, the iron core does not have the design of pertinence simultaneously to the structural change when reply experiment light path need pass from the iron core (slotted iron core) and the experiment needs compact magnetic field (entity iron core).
Disclosure of Invention
The invention aims to provide a multifunctional experimental platform for measuring magneto-optical effect, which aims to solve the problems.
The invention is realized by the following technical scheme:
generally, the multifunctional experiment platform for measuring the magneto-optical effect comprises a controller, a sample magneto device, and a linearly polarized light rotating emitter and a polarized light rotating detector which are positioned on two sides of the sample magneto device, wherein the sample magneto device, the linearly polarized light rotating emitter and the polarized light rotating detector are respectively arranged on linear guide rails, and the linear guide rails are fixed on the same platform in parallel;
preferably, the sample magnetic device is used for conducting a magnetic sample with the specified size of a magnetic field to the specified platform position through the specified magnetic field direction at the specified position corresponding to the lead of the linear guide rail according to a control signal of the controller, and determining the magnetic angle of the sample through the rotation and matching of the left arm and the right arm of the electromagnetic coil, and controlling the existence of the magnetic core inside the electromagnetic coil through the magnetic core management module to influence the magnetic field strength of the magnetic coil, wherein the magnetic core inside the electromagnetic coil is full-concentrated in magnetic field and high in strength, and the magnetic core inside the electromagnetic coil is not full-concentrated in magnetic field and low in strength;
preferably, the linearly polarized light rotating emitter emits linearly polarized light at an appointed position corresponding to the linear guide lead through an appointed horizontal emission rotating angle and an appointed emission rotating angle according to a control signal of the controller, the linearly polarized light is transmitted to an appointed platform position through the guide rail, the horizontal emission rotating angle of the linearly polarized light rotating emitter tube is changed through the rotation of the output shaft of the basic rotating clamping table, and the linearly polarized light rotating emitter tube drives the front end of the linearly polarized light rotating emitter tube to rotate and changes the emission rotating angle through an angle control motor fixed at the rear end of the linear polarization rotating emitter tube (the change of the emission rotating angle does not affect the transmission direction of the linearly polarized light, and only changes the orientation of the polarized surface of the linearly polarized light);
preferably, the polarized light rotation detector detects polarized light at a specified position corresponding to the lead of the linear guide rail through a specified horizontal detection rotation angle according to a control signal of the controller, the polarized light is transmitted to a specified platform position through the guide rail, the horizontal detection rotation angle of the polarized light rotation detection tube is changed through the rotation of the output shaft of the basic rotation clamping table, and then the detection rotation front end is rotated and the detection rotation angle is changed through the driving of the angle control motor at the detection rear end of the polarized light rotation detection tube (the change of the detection rotation angle does not affect the observation direction of the observed optical path, and only the passing rate of the polarized light with different polarization planes penetrating through the optical prism or the polarizing plate at the detection front end is changed, so that the light sensation intensity of the semiconductor light sensor is affected).
Furthermore, the sample magnetic device comprises a left rotary electromagnetic coil arm, a right rotary electromagnetic coil arm and a sample placing table positioned between the left rotary electromagnetic coil arm and the right rotary electromagnetic coil arm, wherein the left rotary electromagnetic coil arm, the right rotary electromagnetic coil arm and the sample placing table are respectively corresponding to one linear guide rail and fixed on a movable sliding block corresponding to the linear guide rail, the sample magnetic device is arranged through three parallel guide rails, different combination forms can be carried out according to different magneto-optical branching effects, and in the process that the left rotary electromagnetic coil arm and the right rotary electromagnetic coil arm of the sample magnetic device reach specified positions through guide rail conduction, the sample placing table also reaches the magnetic specified positions through the guide rails and is matched with the left rotary electromagnetic coil arm and the right rotary electromagnetic coil arm to carry out magnetic induction on samples.
Further, solenoid left arm, solenoid right arm structure constitute the same, and the same structure is easier through mutually supporting, and its structure includes base station rotation module, magnetic conduction core management module and solenoid:
the base station rotating module is fixed on the linear guide rail sliding block and comprises a second control motor and a first gear box with an output shaft, a transmission shaft of the second control motor drives the first gear box to operate, the first gear box drives the output shaft vertical to the platform to rotate, the base station rotating module is fixed on the linear guide rail sliding block, the linear guide rail sliding block drives the base station rotating module on the platform, and the second control motor of the base station rotating module drives the first gear box to further drive the output shaft to transmit, so that the output shaft which is vertical to the platform and can stably rotate on the platform is obtained;
preferably, the magnetic conduction core management module and the electromagnetic coil are fixed on the rotating plate arm, one end of the rotating plate arm is connected with and fixed on the output shaft, the output shaft drives the rotating plate arm to rotate, the rotating plate arm is driven to form a rotating surface parallel to the platform through stable rotation of the output shaft perpendicular to the platform, the magnetic conduction core management module and the electromagnetic coil are fixed on the rotating plate arm, and the electromagnetic coil left arm and the electromagnetic coil right arm are matched with conduction of the linear guide rail to perform multi-angle magnetic matching on the basis of the magnetic conduction core management module and the electromagnetic coil right arm.
The magnetic conduction core management module comprises a third control motor, a second gear box with one end connected with the double parallel thread straight rods, and a magnetic conduction core:
preferably, a transmission shaft of a third control motor drives a second gear box to operate, the second gear box drives a double-parallel threaded straight rod body to spin, the other end of the double-parallel threaded straight rod is coupled to penetrate through a threaded double hole formed in the bottom of the magnetic conducting core, the rod body spins to drive the magnetic conducting core to perform bidirectional transmission along a rod body lead, an electromagnetic coil is correspondingly wound on the outer side of the front end part of a lead transmission track of the magnetic conducting core, the double-parallel threaded straight rod changes the spinning direction of the rod body to drive the magnetic conducting core to be inserted into or pulled out of the electromagnetic coil, the second gear box is driven by a third control motor to further drive the double-parallel threaded straight rod body to spin, so that the magnetic conducting core is driven to enter or be pulled out of the electromagnetic coil, and the purpose of controlling the magnetic field intensity of a magnetic sample of the electromagnetic coil is achieved by controlling the existence of the magnetic conducting core of the electromagnetic coil.
Preferably, the middle position of the top end of the magnetic conducting core is provided with an optical groove, the optical groove penetrates through the magnetic conducting core, the optical groove corresponds to a magnetic conducting block which can be embedded with the optical groove, the magnetic conducting block can be combined with the magnetic conducting core to form a magnetic conducting solid core, when a Faraday magnetooptic rotation effect experiment is carried out, the propagation direction of polarized light is parallel to the opening direction of the electromagnetic coil, the electromagnetic coil still needs to provide higher magnetic field intensity, namely the electromagnetic coil still needs the magnetic conducting core, in order to enable a light path to pass through the optical groove aiming at the magnetic conducting core, but when the magneto-optic Kerr effect is carried out, in order to reduce the experimental error as much as possible, the magnetic conducting solid core is preferably arranged in the electromagnetic coil, the magnetic conducting block which can be embedded with the notch is correspondingly designed aiming at the magnetic conducting core which is grooved, when the magneto-optic Kerr effect detection experiment is carried out, the magnetic conducting block is extracted from the outside of a conducting core conducting coil by using a magnetic conducting core management module, and the magnetic conducting block is coupled and assembled, and then the magnetic conducting core management module sends the solid core into the electromagnetic coil.
The linearly polarized light rotating emitter and the polarized light rotating detector can be freely transmitted corresponding to the transmission tracks of the linear guide rail sliding blocks on the platform through the basic rotating clamping table which is arranged at the bottom of the linearly polarized light rotating emitter and the polarized light rotating detector and fixed on the linear guide rail sliding blocks, and simultaneously the linearly polarized light rotating emitter and the polarized light rotating detector which respectively correspond to the linearly polarized light rotating emitter and the polarized light rotating detector can freely rotate to form a rotating surface parallel to the plane of the platform;
furthermore, the basic rotating clamping table of the linearly polarized light rotating emitter and the polarized light rotating detector changes the corresponding horizontal emitting rotation angle or horizontal detecting rotation angle through the rotation of the output shaft, and flexibly debugs or changes different magneto-optical branching effects before experiments through changing the emitting or detecting angles.
Preferably, a linearly polarized light rotating radiant tube is clamped on a base rotating clamping table of the linearly polarized light rotating transmitter, the linearly polarized light rotating radiant tube comprises an irradiating rear end and an irradiating front end, the irradiating front end can rotate freely relative to the irradiating rear end, the irradiating front end rotates to change the irradiating rotation angle of the linearly polarized light rotating transmitter, an expanding opening is correspondingly arranged on the inner wall of the tube opening end of an irradiating front end shell, a reducing opening is correspondingly arranged on the outer wall of the tube opening end of an irradiating rear end shell, the reducing opening of the outer wall is inserted into a wide opening of the inner wall, the irradiating rear end shell serves as an irradiating front end rotating shaft, the irradiating rear end of the linearly polarized light rotating radiant tube is fastened through a clamp, the stability of linearly polarized light emitted by the linearly polarized light rotating radiant tube is ensured, a stable rotating base is provided for the irradiating front end of the linearly polarized light rotating radiant tube, the rotating precision of the irradiating front end is ensured, and an inner cavity space is reserved for the inner equipment of the linearly polarized light rotating radiant tube to the greatest extent by using the irradiating rear end shell as the irradiating front end.
Preferably, the rear end of the linearly polarized light rotating beam tube comprises an angle control motor with a reduction gear box and a laser fixed in front of the angle control motor through a fixing plate, an external gear is arranged at the end of a transmission shaft between the angle control motor and the laser, an internal gear of the front end of the linearly polarized light rotating beam tube is correspondingly meshed and driven, the internal gear is fixed in an inner cavity of a shell of the front end of the beam rotation, the external gear drives the internal gear to further drive the front end of the beam rotation to rotate, a diaphragm plate is arranged in the front end of the internal gear and the columnar shell, a square cavity is correspondingly arranged at the front end of the diaphragm plate, an optical prism or a polarizing plate is arranged in the square cavity, more stable and accurate transmission control can be provided through the transmission of the angle control motor with the reduction gear box and the meshed external gear and the internal gear, the laser is fixed at the front end of the angle control motor through the fixing plate, the laser is ensured to be fixed at the rear end of the beam rotation, a stable emission foundation is further provided, and the size of the diaphragm plate arranged at the front end of the linearly polarized light is used for limiting laser, and filtering the laser to be used for filtering the laser.
Preferably, the base rotary clamping table of the polarized light rotary detector is provided with a polarized light rotary detection tube, the polarized light rotary detection tube comprises a detection fixed rear end and a detection rotary front end, the detection rotary front end freely rotates relative to the detection fixed rear end, the detection rotary angle of the polarized light rotary detector is changed by the rotation of the detection rotary front end, the inner wall of the detection rotary front end shell tube opening is correspondingly provided with an expanding opening, the outer wall of the detection fixed rear end shell tube opening is correspondingly provided with a necking opening II, the outer wall necking opening II is inserted into an inner wall opening, the detection fixed rear end shell serves as a detection rotary front end rotating shaft, the detection fixed rear end of the polarized light rotary detection tube is fastened through a clamp, the stability of the polarized light rotary detection tube in detecting polarized light is ensured, a stable rotary foundation is provided for the detection rotary front end of the polarized light rotary detection tube, the rotary front end rotary precision is ensured, and an inner cavity space is reserved for the polarized light rotary detection device to the maximum degree by using the detection fixed rear end shell as the rotation rotary shaft of the detection rotary front end.
Preferably, the probing rear end of the polarized light rotation probe tube comprises an angle control motor with a reduction gear box and a semiconductor light sensor fixed in front of the angle control motor through a fixing plate, an external gear is arranged at the end of a transmission shaft between the angle control motor and the semiconductor light sensor, an internal gear which is in meshing transmission with the external gear is a large internal gear at the probing front end of the polarized light rotation probe tube, the large internal gear is fixed in an inner cavity of a shell of the probing front end, the small external gear drives the large internal gear to drive the probing front end to rotate, a long and narrow hole cavity is further arranged at the front end of the large internal gear and inside the columnar shell, a square cavity is correspondingly arranged at the front end of the long and narrow hole cavity, an optical prism or a polarizing plate is arranged in the square cavity, more stable and precise transmission control can be provided through the transmission of the angle control motor with the small external gear with the reduction gear box and the transmission of the small external gear and the large internal gear, the semiconductor light sensor is fixed at the front end of the angle control motor through the fixing plate, and narrow hole detection base is used for shielding stray light of the optical polarizer or the polarization detection cavity.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the basic rotating clamping table of the linearly polarized light rotating emitter drives the linearly polarized light rotating radiant tube to rotate through the rotating clamp, the linearly polarized light rotating radiant tube is enabled to have any horizontal emission rotating angle in a rotating plane parallel to a platform, the orientation of the polarization surface of the linearly polarized light can be changed under the condition that a light propagation path is unchanged through the free rotation of the front end of the linearly polarized light relative to the rear end of the linearly polarized light, and the linearly polarized light rotating emitter is matched with a linear guide rail corresponding to the linearly polarized light emitter, so that the linearly polarized light emitting unit can be integrally formed, the polarization surface of the polarized light can be directly generated, the direction of the polarization surface of the polarized light can be modulated, and the emission position can be changed;
2. in the modulation and calibration process of the optimal observation angle of the observed polarized light, the optimal observation angle of the radial direction of the polarized light is obtained by only adjusting the detection rotation angle of the polarized light rotating detection tube, the optimal observation angle of the radial direction of the polarized light can be obtained by adjusting the transmission rotation angle of the linearly polarized light rotating detection tube, and in addition, the transmission rotation angle of the linearly polarized light rotating detection tube can be adjusted for multiple times in the experiment process and matched with the calibration of the detection rotation angle of the polarized light rotating detection tube to carry out multiple comparison experiments for analyzing magneto-optical effect attributes of samples after the linearly polarized light towards different polarization surfaces irradiates the samples;
3. the sample magnetic device of the invention adopts an electromagnetic coil left arm, an electromagnetic coil right arm and a sample mounting table which are respectively arranged on three parallel guide rail sliders, and through the rotation combination of the electromagnetic coil left arm and the electromagnetic coil right arm, for example, when the opening directions of two electromagnetic coils of the electromagnetic coil left arm and the electromagnetic coil right arm are consistent with the conduction direction of the linear guide rail slider and the electromagnetic coils are arranged on the linear guide rail corresponding to the sample mounting table, the magnetic field direction of the sample is parallel to the conduction direction of the linear guide rail slider, and when the opening directions of the two electromagnetic coils of the electromagnetic coil left arm and the electromagnetic coil right arm are vertical to the conduction direction of the linear guide rail slider, the openings of the two electromagnetic coils are superposed and the two electromagnetic coils are arranged on the inner sides of the linear guide rail corresponding to the electromagnetic coil left arm and the electromagnetic coil right arm, the magnetic field direction of the sample is vertical to the conduction direction of the linear guide rail slider, and the magnetic core management module is matched, and the two electromagnetic coils can have: and finally, by matching with the three parallel guide rails for review, the sample magnetic device can flexibly regulate and control the magnetic position, the magnetic angle, the magnetic core existence and the magnetic distance of the magnetic electromagnetic coil according to the experimental requirements, and can manually select whether to use the magnetic blocks to combine the magnetic cores into the magnetic solid core according to the experimental requirements.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the magneto-optical Kerr effect test layout according to the present invention;
FIG. 3 is a schematic diagram of the layout of Faraday magneto-optical rotation effect test according to the present invention;
FIG. 4 is a schematic diagram of the layout of Koton-Moton birefringence test according to the present invention;
FIG. 5 is an axially disassembled view of the polarized light rotating probe tube of the present invention;
FIG. 6 is an axial disassembly schematic of a linearly polarized light rotating beam of the present invention;
FIG. 7 is a schematic view of a basic rotary clamping table according to the present invention;
FIG. 8 is a schematic diagram of the structure of the left and right arms of the solenoid of the present invention;
fig. 9 is a schematic view of the structure of the linear guide rail of the present invention.
The reference numerals denote: 1-platform, 2-linearly polarized light rotating emitter, 2-1-reflection rear end housing, 2-2-throat, 2-3-laser, 2-4-reflection front end housing, 2-5-linearly polarized light rotating emission tube, 3-electromagnetic coil left arm, 4-sample mounting table, 5-electromagnetic coil right arm, 6-polarized light rotating detector, 6-1-detection rear end housing, 6-2-throat two, 6-3-semiconductor light sensor, 6-4-detection front end housing, 6-5-polarized light rotating detection tube, 7-linear guide rail, 8-angle control motor, 9-reduction gear box, 10-fixed plate, 11-external gear, 12-internal gear, 13-optical prism or polarizing plate, 14-first control motor, 15-first gear box, 16-clamp, 17-basic rotating clamp table, 18-rotating plate arm, 19-second gear box, 20-magnetic conductive core, 21-magnetic conductive block, 22-electromagnetic coil, 22-threaded guide rail, 23-24-slide block, 28-slide block, 27-linear control linear guide rail, 28-linear control motor, and third control linear control motor.
Detailed description of the preferred embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention. It should be noted that the present invention is in practical development and use.
Examples
As shown in fig. 1 and 9, the present embodiment includes a platform 1, a linearly polarized light rotary emitter 2 located on the left side, a sample magnetic device in the middle, and a polarized light rotary detector 6 located on the right side, where the linearly polarized light rotary emitter 2, the sample magnetic device, and the polarized light rotary detector 6 are respectively disposed on a slider 24 of each linear guide rail 7, and the linear guide rails 7 are fixed on the platform 1 and are parallel to each other;
referring to fig. 6 and 7, the linearly polarized light rotating emitter 2 is composed of a base rotating clamping table 17 and a linearly polarized light rotating emission tube 2-5 clamped by the base rotating clamping table 17, the base rotating clamping table 17 is composed of a first control motor 14, a first gear box 15 and a clamp 16, wherein the first gear box 15 is provided with an output shaft perpendicular to the platform 1, the clamp 16 is fixed with the end head of the output shaft, a transmission shaft of the first control motor 14 rotates to drive the first gear box 15 to rotate and drive the output shaft to rotate so as to drive the clamp 16 to rotate, the clamp 16 rotates to drive the linearly polarized light rotating emission tube 2-5 clamped by the clamp 16 to rotate, and the output shaft is perpendicular to the platform 1, so that the linearly polarized light rotating emission tube 2-5 can obtain a complete circumferential emission rotation angle in a rotating plane parallel to the platform 1 and is matched with the linear guide rail 7 at the bottom, the linearly polarized light rotating injection pipe 2-5 can move along with the lead of the corresponding linear guide rail 7 and can rotate and emit linearly polarized light at any position in the lead, the linearly polarized light rotating injection pipe 2-5 consists of an injection rear end and an injection front end, the injection front end can rotate relative to the injection rear end, the injection rear end consists of a set rear end shell 2-1, an angle control motor 8 with a reduction gear box 9 and a laser 2-3 fixed in front of the motor through a fixed plate 10, an external small gear 11 is arranged at the end of a transmission shaft between the angle control motor 8 and the laser 2-3 and is in meshed transmission with an internal large gear 12 fixed in an inner cavity of the injection front end shell 2-4 so as to drive the injection front end to rotate, and simultaneously, an expanding opening and a contracting opening 2-2 are respectively arranged at the joint of the injection front end shell 2-4 and the injection rear end shell 2-1, the reducing opening 2-2 is directly inserted into the flaring, the rear end housing 2-1 is used as a rotating shaft of the front end of the reflection rotation, the inner cavity of the front end housing 2-4 is provided with a diaphragm plate, the square cavity of the front end of the diaphragm plate is internally provided with an optical prism or a polarizing plate 13, the front end of the reflection rotation rotates to drive the optical prism or the polarizing plate 13 to rotate, the relative position and the angle of the optical prism or the polarizing plate 13 and the laser 2-3 at the rear end of the reflection rotation are changed, and the transmission rotating angle can be adjusted without changing the transmission direction of linearly polarized light, so that the linearly polarized light rotating transmitter 2 can flexibly adjust the position, the horizontal transmission rotating angle and the transmission rotating transmission angle of the linearly polarized light on the platform 1.
As shown in fig. 5, the principle of the polarized light rotation detector 6 is substantially consistent with that of the linearly polarized light rotation emitter 2, except that:
structurally, an angle control motor 8 at the detection rear end fixes a semiconductor photoreceptor 6-3 at the front end through a fixing plate 10, and a shell 6-4 at the detection front end is not provided with a diaphragm plate and is provided with a long and narrow through hole for shielding stray light;
in action, the position, the horizontal detection angle of the polarized light rotation detection tube 6-5 and the rotation detection angle are regulated to detect linearly polarized light.
Referring to fig. 8, the sample magnetic device is composed of a left rotating arm 3 of the electromagnetic coil, a right rotating arm 5 of the electromagnetic coil, and a sample mounting table 4 disposed between the two arms, the left rotating arm 3 of the electromagnetic coil, the right rotating arm 5 of the electromagnetic coil, and the sample mounting table 4 are respectively disposed on three sliders 24 of the mutually parallel linear guide rails 7, wherein the left arm 3 of the electromagnetic coil and the right arm 5 of the electromagnetic coil have the same structure, the structure is composed of a base rotating base, a rotating plate arm 18, a magnetic core management module, and an electromagnetic coil 22, the base rotating base includes a second control motor 26, a first gear box 15 connected to a transmission shaft of the second control motor 26, the first gear box 15 is disposed on the first gear box 15, the transmission shaft of the second control motor 26 drives the first gear box 15 to rotate, and further drives the output shaft to rotate, one end of the top of the output shaft fixes one end of the rotating plate arm 18, the rotating plate arm 18 is driven to rotate, an electromagnetic coil 22 is fixed on the upper side of the rotating plate arm 18, a double parallel thread straight rod 23 is distributed at the bottom in the electromagnetic coil 22, the rod body direction of the double parallel thread straight rod 23 is the same as the opening direction of the electromagnetic coil 22, the rod body of the double parallel thread straight rod 23 is arranged in a magnetic conduction core 20 with a double internal thread hole at the bottom in a penetrating way, the rod body threads are in threaded coupling with the magnetic conduction core 20, one end of the rod body of the double parallel thread straight rod 23 is connected with a second gear box 19, the second gear box 19 is correspondingly provided with a third control motor 27 used for driving, the third control motor 27 drives the second gear box 19 to further drive the rod body of the double parallel thread straight rod 23 to spin, the magnetic conduction core 20 is driven to move on the lead of the double parallel thread straight rod 23, the magnetic conduction core 20 is further sent into the electromagnetic coil 22 or extracted from the electromagnetic coil 22, and the corresponding magnetic conduction core 20 is provided with a light passing groove, a magnetic conduction block 21 is arranged corresponding to the light passing groove, and whether the magnetic conduction block 21 is used for embedding the magnetic conduction core 20 to form a magnetic conduction solid core is manually selected according to the requirements of the magneto-optical effect branching effect experiment;
the electromagnetic coils 22 are wound by copper wires, protective linings wrap the inner side and the outer side of each electromagnetic coil 22, a virtual straight line in the middle of the opening direction of each electromagnetic coil 22 is parallel to at least one tangent line of a circular rotating surface of one electromagnetic coil 22, and the magnetic field direction of the linear guide rail 7 is ensured to be parallel to the magnetic field direction of the linear guide rail 7 at a short distance when the two electromagnetic coils 22 of the left arm and the right arm (3 and 5) of each electromagnetic coil are arranged above the linear guide rail 7 of the sample mounting table 4, and to be perpendicular to the magnetic field direction of the linear guide rail 7 at a short distance when the two electromagnetic coils are arranged at two sides of the linear guide rail 7.
Referring again to fig. 2, the experimental setup for implementing the magneto-optical kerr effect of the example is shown:
the linearly polarized light rotating emitter 2 and the polarized light rotating detector 6 are arranged at the front end of the platform 1 through corresponding linear guide rails 7, the sample magnetic device is arranged at the rear end through corresponding linear guide rails 7, the linearly polarized light rotating emitter 2 is adjusted to enable the linearly polarized light rotating tube 2-5 to emit linearly polarized light to the surface of a magneto-optical Kerr reflection type sample arranged above the sample mounting table 4 at a correct horizontal emission angle, meanwhile, the electromagnetic coil left arm and the electromagnetic coil right arm (3 and 5) are adjusted to magnetically excite the sample in a magnetic field direction parallel to the linear guide rails 7 corresponding to the sample mounting table 4, the polarized light rotating detector 6 is adjusted to enable the polarized light rotating detection tube 6-5 to observe the polarized light reflected by the sample at a correct horizontal detection angle, the polarized light rotating detection tube 6-5 is adjusted to obtain the light intensity of the detected polarized light under different rotating detection angles through the semiconductor optical sensor 6-3, the rotating detection tube 6-5 rotates the detection angle and the magneto-optical effect under the rotating detection angle according to the corresponding linearly polarized light rotating emission angle, and the magneto-optical effect is verified;
at this time, the magnetic conduction core 20 is arranged inside the electromagnetic coil and combined with the magnetic conduction block 21 to form a magnetic conduction solid core.
Referring to FIG. 3, the experimental attitude of Faraday magneto-rotation effect is shown:
the Faraday magneto-optical rotation effect test is to adjust the orientation of a linearly polarized light rotating emission tube 2-5, the orientation of a polarized light rotating detection tube 6-5, the orientation of an opening of an electromagnetic coil 22 of an electromagnetic coil left arm 3 of a sample magneto device, the orientation of an opening of an electromagnetic coil 22 of an electromagnetic coil right arm 5 and a sample mounting table 4 to enable the linearly polarized light to be on the same straight line, at the moment, the linearly polarized light needs to penetrate through a light passing groove of a magnetic conducting core 20 arranged inside the magnetic conducting coil 22 and a light transmitting sample, then, a magnetic conducting block 21 is not used in the experiment, and after the arrangement is finished, the Faraday magneto-optical rotation effect is verified through the transmitting and parameter collecting process of the magneto-optical Kerr effect.
Referring to fig. 4 again, experimental attitudes of the magneto-birefringence effects of the examples are shown:
the magnetic birefringence effect is similar to the layout mode of the Faraday magnetic rotation effect, except that the electromagnetic coil 22 faces to a linear guide rail 7 corresponding to the sample mounting table 4 instead of the same linear line, and the magnetic birefringence effect is verified by the emission and parameter collection process which is the same as that described above;
the magnetically permeable core 20 is now disposed outside the electromagnetic coil 22 to reduce the magnetic field strength.
In the controller of the embodiment, a PLC (programmable logic controller) with a Siemens model number of s7200 is used as a control main brain, a liquid crystal display with a Siemens model number of 6AV2123-2GB03-0AX0 is used as an interactive component, and instruction input and parameter output are carried out;
while the optical prism or polarizer 13 employs a glan prism.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a measure multi-functional test platform of magneto-optical effect, includes the controller, sample magnetic device and be located the rotatory transmitter of linearly polarized light (2) of sample magnetic device both sides, polarized light rotation detector (6), sample magnetic device, the rotatory transmitter of linearly polarized light (2), polarized light rotation detector (6) set up respectively on each linear guide (7), parallel fixation between each linear guide (7) is on same platform (1), its characterized in that:
the sample magnetic device magnetically induces the sample with the specified magnetic field size at the specified position corresponding to the lead of the linear guide rail (7) according to the control signal of the controller through the specified magnetic field direction;
the linearly polarized light rotating transmitter (2) transmits linearly polarized light at a designated position corresponding to the lead of the linear guide rail (7) through a designated horizontal transmitting corner at a designated transmitting rotating angle according to a control signal of the controller;
the polarized light rotation detector (6) detects polarized light at a specified detection rotation angle through a specified horizontal detection rotation angle at a specified position corresponding to the lead of the linear guide (7) according to a control signal of the controller.
2. A multifunctional test platform for measuring magneto-optical effects according to claim 1, wherein the sample magneto-emission device comprises a left arm (3) of a rotary electromagnetic coil, a right arm (5) of the rotary electromagnetic coil and a sample placement platform (4) therebetween, and the left arm (3) of the rotary electromagnetic coil, the right arm (5) of the rotary electromagnetic coil and the sample placement platform (4) are respectively corresponding to one linear guide (7) and fixed on a slide (24) of the corresponding linear guide (7).
3. A multifunctional laboratory platform according to claim 2, characterized in that the electromagnetic coil left arm (3) and the electromagnetic coil right arm (5) are the same in structure composition, and the structure thereof comprises a base station rotation module, a magnetic conduction core management module and an electromagnetic coil (22):
the base station rotating module is fixed on a sliding block (24) of the linear guide rail (7) and comprises a second control motor (26) and a first gear box (15) with an output shaft, a transmission shaft of the second control motor (26) drives the first gear box (15) to operate, and the first gear box (15) drives the output shaft vertical to the platform (1) to rotate;
the magnetic core management module and the electromagnetic coil (22) are fixed on the rotating plate arm (18), one end of the rotating plate arm (18) is connected and fixed on the output shaft, and the output shaft drives the rotating plate arm (18) to rotate.
4. A multifunctional laboratory platform for measuring magneto-optical effects according to claim 3, characterized in that the magnetically conductive core management module comprises a third control motor (27), a second gearbox (19) with double parallel threaded straight bars (23) and a magnetically conductive core (20):
a transmission shaft of a third control motor (27) drives a second gear box (19) to rotate, the second gear box (19) drives a double-parallel threaded straight rod (23) to rotate in a self-rotating mode, the rod body of the double-parallel threaded straight rod (23) penetrates through a threaded double hole formed in the bottom of a magnetic conducting core (20) in a coupling mode, the rod body self-rotating mode drives the magnetic conducting core (20) to carry out bidirectional transmission along a rod body lead, an electromagnetic coil (22) is correspondingly wound on the outer side of the front end portion of a track of the magnetic conducting core (20) according to the lead transmission, and the double-parallel threaded straight rod (23) changes the self-rotating direction of the rod body to drive the magnetic conducting core (20) to insert or withdraw from the electromagnetic coil (22);
the middle position of the top end of the magnetic conduction core (20) is provided with a light passing groove, the light passing groove penetrates through the magnetic conduction core (20), the light passing groove is correspondingly provided with a magnetic conduction block (21) which can be embedded with the light passing groove, and the magnetic conduction block (21) can be combined with the magnetic conduction core (20) to form a magnetic conduction solid core.
5. A multifunctional experimental platform for measuring magneto-optical effect according to claim 1, characterized in that the linearly polarized light rotating emitter (2) and the polarized light rotating detector (6) comprise basic rotating clamping tables (17) with the same structure, the basic rotating clamping tables (17) are fixed on the sliding blocks (24) corresponding to the linear guide rails (7), and comprise a first control motor (14), a first gear box (15) with an output shaft and a clamp (16), the first control motor (14) drives the first gear box (15) to transmit, further drives the output shaft perpendicular to the platform (1) to rotate, and further drives the clamp (16) fixed above the output shaft to rotate;
the basic rotating clamping table (17) of the linearly polarized light rotating emitter (2) and the polarized light rotating detector (6) changes the corresponding horizontal emitting rotation angle or horizontal detecting rotation angle through the rotation of the output shaft.
6. A multifunctional experiment platform for measuring a magneto-optical effect according to claim 5, characterized in that a linearly polarized light rotating emission tube (2-5) is clamped by a basic rotating clamping table (17) of the linearly polarized light rotating emission device (2), the linearly polarized light rotating emission tube (2-5) comprises an emission rear end and an emission front end, the emission front end freely rotates relative to the emission rear end, the emission rotation angle of the linearly polarized light rotating emission device (2) is changed by rotating the emission front end, the inner wall of the tube end of the emission front end housing (2-4) is correspondingly provided with a flared opening, the outer wall of the tube end of the emission rear end housing (2-1) is correspondingly provided with a reduced opening (2-2), the reduced opening (2-2) of the outer wall is inserted into the flared opening of the inner wall, and the emission rear end housing (2-1) serves as a rotating shaft of the emission front end housing (2-4).
7. The multifunctional experiment platform for measuring the magneto-optical effect according to claim 6, wherein the rear end of the linearly polarized light rotating emission tube (2-5) comprises an angle control motor (8) with a reduction gear box (9) and a laser (2-3) fixed in front of the angle control motor (8) through a fixing plate (10), the end of an output shaft of the angle control motor (8) and the laser (2-3) with the reduction gear box (9) is provided with an external gear (11), the internal gear (12) of the front end of the linearly polarized light rotating emission tube is correspondingly meshed and driven to rotate, the internal gear (12) is fixed in an inner cavity of the casing (2-4) of the front end of the emission rotation, the external gear (11) drives the large gear (12) to further drive the front end of the emission rotation to rotate, the front end of the internal gear (12) and the casing (2-4) of the front end of the emission rotation front end are further provided with a square diaphragm plate and a front end opposite to the square diaphragm cavity, and an optical diaphragm or a square cavity (13) is arranged in the square cavity.
8. The multifunctional experimental platform for measuring the magneto-optical effect as claimed in claim 5, wherein a base rotary clamping table (17) of the polarized light rotary detector (6) clamps the polarized light rotary detection tube (6-5), the polarized light rotary detection tube (6-5) comprises a detection rear end and a detection rotary front end, the detection rotary front end freely rotates relative to the detection rear end, the detection rotary front end rotates to change the detection rotary angle of the polarized light rotary detector (6), an expansion opening is correspondingly arranged on the inner wall of the tube end of the detection rotary front end shell (6-4), a contraction opening II (6-2) is correspondingly arranged on the outer wall of the tube end of the detection rotary rear end shell (6-1), the contraction opening II (6-2) of the outer wall is inserted into the expansion opening of the inner wall, and the detection rotary rear end shell (6-1) serves as a rotary shaft of the detection rotary front end shell (6-4).
9. A multifunctional experimental platform for measuring magneto-optical effects as claimed in claim 8, wherein: the rear detection end of the polarized light rotary detection tube (6-5) comprises an angle control motor (8) with a reduction gear box (9), a semiconductor light sensor (6-3) fixed in front of the angle control motor (8) through a fixed plate (10), an outer small gear (11) is arranged at the end of an output shaft of the reduction gear box (9) between the angle control motor (8) and the semiconductor light sensor (6-3), an inner large gear (12) which is correspondingly meshed with the outer small gear and drives the front detection end of the polarized light rotary detection tube (6-5) is arranged at the front end of the output shaft, the inner large gear (12) is fixed in an inner cavity of a front detection and rotation end shell (6-4), the outer small gear (11) drives the inner large gear (12) to further drive the front detection and rotation end to rotate, a long and narrow hole cavity is further arranged at the front end of the inner large gear (12) and the front end shell (6-4) of the detection and rotation end shell (6-4), and a rectangular cavity is internally provided with an optical prism or a polarizing plate (13).
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