A magnetic domain imaging device with an adjustable illumination area

Abstract

The present invention discloses a magnetic domain imaging device with an adjustable illumination area, which relates to the technical field of magnetic domain imaging. The device includes: a light generation component, an optical path adjustment component, and an imaging component; the light generation component is used to generate polarized light; the optical path adjustment component includes a prism and a digital micromirror device, and the polarized light is transmitted to the digital micromirror device through the prism; at least part of the polarized light is reflected by the micromirrors on the digital micromirror device to the object to be measured; the optical path between the light generation component and the object to be measured is a critical illumination optical path; the imaging component is arranged in the reflection optical path of the polarized light reflected by the object to be measured.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic domain imaging, and particularly to a magnetic domain imaging device with an adjustable illumination area. Background Art

[0002] Magnetic domain imaging technology, an important research tool in materials science, observes and analyzes the magnetic domain structure by detecting the change in the polarization state of the detection light after reflection from the surface of the measured magnetic material. This technology provides researchers and engineers with an intuitive and accurate way to analyze the magnetic domain structure and behavior, which is of great significance for understanding the magnetic properties of materials and optimizing the design of magnetic materials.

[0003] However, in the development and application of magnetic domain imaging technology, the lighting control link has gradually emerged as crucial. In traditional magnetic domain imaging devices, the lighting system usually adopts a fixed illumination area. This design is inadequate when faced with samples of different shapes, sizes, and characteristics. Due to the inability to flexibly adjust the lighting position according to actual needs, the imaging flexibility and accuracy of these devices are severely limited, thus affecting the accuracy and effectiveness of magnetic domain imaging.

[0004] To obtain higher-quality imaging effects, it is particularly important to control the illumination area more precisely. However, achieving this goal is not easy. Traditional optical path designs are often complex and require high installation accuracy, which not only increases the manufacturing cost of the equipment but also reduces the user's convenience of use. At the same time, due to the local shape differences of the samples, bright spots may be formed during the imaging process, and these bright spots will seriously affect the overall brightness and imaging effect of the picture, thereby interfering with the accurate analysis of the magnetic domain structure.

[0005] Therefore, how to make the magnetic domain imaging device flexibly adjust the illumination area while reducing the installation accuracy requirements of the optical path components and improving the convenience of loading and unloading has become a technical problem to be solved urgently. Summary of the Invention

[0006] Embodiments of the present invention provide a magnetic domain imaging device with an adjustable illumination area to solve the following technical problem: how to make the magnetic domain imaging device flexibly adjust the illumination area while reducing the installation accuracy requirements of the optical path components and improving the convenience of loading and unloading.

[0007] Embodiments of the present invention adopt the following technical solutions:

[0008] An embodiment of the present invention provides a magnetic domain imaging device with an adjustable illumination area. The device includes: a light generating component, an optical path adjusting component, and an imaging component; the light generating component is used to generate polarized light; the optical path adjusting component includes a prism and a digital micromirror device, and the polarized light is transmitted to the digital micromirror device through the prism; at least part of the polarized light is reflected by the micromirrors on the digital micromirror device to the object to be measured; the optical path between the light generating component and the object to be measured is a critical illumination optical path; the imaging component is arranged in the reflection optical path of the polarized light reflected by the object to be measured.

[0009] In a possible implementation manner of the present invention, the polarized light is incident on the object to be measured obliquely.

[0010] In a possible implementation manner of the present invention, the device further includes a beam splitting component; the beam splitting component is arranged on the optical path between the digital micromirror device and the object to be measured, and at least part of the polarized light reflected by the digital micromirror device is irradiated to the object to be measured through the beam splitting component, and the polarized light reflected by the object to be measured enters the imaging component through the beam splitting component at least.

[0011] In a possible implementation manner of the present invention, the light generating component at least includes: a laser light source and a polarizer; the laser light source is used to generate illumination light; the polarizer is arranged in the optical path of the illumination light and converts the illumination light into polarized light.

[0012] In a possible implementation manner of the present invention, the light generating component further includes a collimator, and the collimator is arranged in the optical path of the illumination light generated by the laser light source.

[0013] In a possible implementation manner of the present invention, the light generating component further includes: an optical fiber and an optical fiber output device; the optical fiber is connected to the laser light source and is used to transmit the illumination light generated by the laser light source; the optical fiber output device is arranged at the end of the optical fiber and is used to emit the illumination light transmitted by the optical fiber to the polarizer.

[0014] In a possible implementation manner of the present invention, the optical path adjusting component further includes: a light trap; the digital micromirror device reflects at least part of the polarized light to the object to be measured, and at least another part of the polarized light is reflected to the light trap, and the light trap is used to absorb the light it receives.

[0015] In a possible implementation manner of the present invention, the imaging component at least includes: an analyzer and a camera; the light reflected by the object to be measured enters the camera after passing through the analyzer, and the camera performs imaging according to the received polarized light.

[0016] In a possible implementation manner of the present invention, the imaging component further includes: a first lens component; the first lens component is disposed in the optical path between the object to be measured and the camera.

[0017] In a possible implementation manner of the present invention, the optical path adjustment component further includes a condenser component; the condenser component is at least disposed in the optical path between the digital micromirror device and the object to be measured.

[0018] Compared with the prior art, a magnetic domain imaging device with an adjustable illumination area provided by an embodiment of the present invention has the following beneficial effects:

[0019] 1) Reducing the requirement for installation accuracy: Since the digital micromirror device has a large reflection surface, the light emitted from the optical fiber only needs to irradiate on the digital micromirror device, and then the illumination position on the object to be measured can be flexibly adjusted through this device. This characteristic significantly reduces the installation accuracy requirements of the optical path components, thereby simplifying the construction process of the optical system and improving the fault tolerance and stability of the system.

[0020] 2) Improving the convenience of loading and unloading: Traditional optical systems often require precise calibration and alignment. However, due to the flexible light control ability of the digital micromirror device of the present invention, the complexity of this step is greatly reduced, making the loading and unloading process faster and more convenient, and greatly improving the work efficiency.

[0021] 3) Optimizing the image quality: The present invention can avoid the bright spots formed by the local shape on the sample, and these bright spots often interfere with the overall brightness and visual effect of the picture in traditional optical detection. Through the precise regulation of the digital micromirror device, these adverse factors can be effectively eliminated, so as to obtain an image with uniform brightness and higher quality. Description of the Drawings

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0023] Figure 1 It is a schematic structural diagram of a magnetic domain imaging device with an adjustable illumination area provided by an embodiment of the present invention;

[0024] Figure 2 It is a schematic structural diagram of another magnetic domain imaging device with an adjustable illumination area provided by an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of magnetic domain imaging provided by an embodiment of the present invention. Detailed Embodiments

[0026] To make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work fall within the scope of protection of the present invention.

[0027] The technical solutions proposed in the embodiments of the present invention will be described in detail below with reference to the drawings.

[0028] Figure 1 The following is a schematic structural diagram of a magnetic domain imaging device with an adjustable illumination area provided by an embodiment of the present invention. As Figure 1 shown, a magnetic domain imaging device with an adjustable illumination area provided by an embodiment of the present invention includes: a light generating component 11, an optical path adjustment component 12, and an imaging component 13. Among them, the light generating component 11 is used to generate polarized light; the optical path adjustment component 12 is used to adjust the polarized light generated by the light generating component 11 and then irradiate it onto the object to be measured 4; the imaging component 13 is used to receive the polarized light reflected by the object to be measured 4 and perform imaging.

[0029] In a possible implementation manner of the present invention, the optical path adjustment component 12 includes a prism 122 and a digital micromirror device 121. The polarized light generated by the light generating component 11 is transmitted to the digital micromirror device 121 through the prism 122. Among them, the optical path between the light generating component 11 and the object to be measured 4 is a critical illumination optical path, and at least part of the polarized light transmitted to the digital micromirror device 121 is reflected by the micromirrors on the digital micromirror device 121 to the object to be measured 4. The imaging component 13 is arranged in the reflection optical path of the polarized light reflected by the object to be measured 4.

[0030] It should be noted that the digital micromirror device 121 is composed of square micromirrors arranged in sequence, and each micromirror represents a pixel. These micromirrors can deflect ±12° around their diagonals (45° direction), corresponding to two stable states of "on" and "off" respectively. Therefore, when a given control signal sequence is written into the circuit of the digital micromirror device 121, the area position on the digital micromirror device 121 that can reflect in a preset direction can be controlled, so as to realize the reflection of the incident light by the reflection units in the preset area, while other areas do not reflect.

[0031] Therefore, based on the characteristics of the above digital micromirror device 121 and the critical illumination optical path, the embodiments of the present invention use different reflection units in the digital micromirror device 121 to reflect the polarized light emitted from the light generating component 11, so as to precisely control at least part of the polarized light with non-uniformity, effectively eliminate adverse factors, and thus obtain an image with uniform brightness and higher quality during imaging.

[0032] Embodiment 1:

[0033] In a possible implementation of the present invention, as Figure 1 shown, the light generating component 11 at least includes: a laser light source 111 and a polarizer 115; the laser light source 111 is used to generate illumination light; the polarizer 115 is disposed in the optical path of the illumination light and is used to convert the illumination light into polarized light.

[0034] Further, as Figure 1 shown, the light generating component 11 may further include: a collimator 114, which is disposed in the optical path of the illumination light generated by the laser light source and is used to convert the illumination light into a parallel light beam, ensuring that the polarized light incident on the digital micromirror device 121 is parallel light, so that the control signal sequence written into the digital micromirror device 121 can accurately control the polarized light on the corresponding micromirror.

[0035] Further, as Figure 1 shown, the light generating component 11 may further include: an optical fiber 112 and an optical fiber output device 113. Among them, the optical fiber 112 is connected to the laser light source 111 and is used to transmit the illumination light generated by the laser light source 111; the optical fiber output device 113 is disposed at the end of the optical fiber 112 and is used to emit the illumination light transmitted by the optical fiber 112 to the polarizer 115.

[0036] Embodiment 2:

[0037] In a possible implementation of the present invention, as Figure 2 shown, the light generating component 11 at least includes: a red LED light source 211, a blue LED light source 212, a green LED light source 213, a wavelength division multiplexer 214 and a polarizer 115. Among them, the red LED light source 211, the blue LED light source 212, and the green LED light source 213 are respectively used to generate light of corresponding wavelengths; the wavelength division multiplexer 214 is connected to the red LED light source 211, the blue LED light source 212, and the green LED light source 213 and is used to combine the three wavelengths of illumination light generated by the red LED light source 211, the blue LED light source 212, and the green LED light source 213 into a wavelength-division multiplexed illumination light. The polarizer 115 is disposed in the optical path of the illumination light and is used to convert the illumination light into polarized light.

[0038] Further, as Figure 2 shown, the light generating component 11 may further include: a collimator 114, which is disposed in the optical path of the illumination light generated by the wavelength division multiplexer 214 and is used to convert the illumination light into a parallel light beam, ensuring that the polarized light incident on the digital micromirror device 121 is parallel light, so that the control signal sequence written into the digital micromirror device 121 can accurately control the polarized light on the corresponding micromirror.

[0039] Further, as Figure 2 shown, the light generating component 11 may further include: an optical fiber 112 and an optical fiber output device 113. Among them, the optical fiber 112 is connected to the wavelength division multiplexer 214 and is used to transmit the illumination light generated by the wavelength division multiplexer 214; the optical fiber output device 113 is disposed at the end of the optical fiber 112 and is used to emit the illumination light transmitted by the optical fiber 112 to the polarizer 115.

[0040] In a possible implementation manner of the present invention, as Figure 1 shown, the optical path adjustment component 12 may further include a light trap 123. The digital micromirror device 121 reflects at least part of the polarized light to the object to be measured 4, and at least another part of the polarized light is reflected to the light trap 123. Therefore, in this implementation manner, the light trap 123 is used to absorb the light it receives. It can be understood that the light received by the light trap 123 is stray light reflected by part of the reflection units of the digital micromirror device 121. The light trap 123 absorbs these stray lights to avoid the influence of the stray lights on the optical system and thus avoid affecting the imaging effect.

[0041] In a possible implementation manner of the present invention, as Figure 1 shown, the optical path adjustment component 12 may further include a condenser component 124. The condenser component 124 may be composed of a second lens component and is at least disposed in the optical path between the digital micromirror device 121 and the object to be measured 4 for adjusting the polarized light reflected by the digital micromirror device.

[0042] Embodiment 3:

[0043] In a possible implementation manner of the present invention, as Figure 1 shown, since the polarized light projected by the condenser component 124 needs to enter the imaging component 13 after being reflected by the object to be measured 4, therefore, in this embodiment, the polarized light passing through the condenser component 124 is obliquely incident on the object to be measured 4.

[0044] Embodiment 4:

[0045] In a possible implementation manner of the present invention, as Figure 2 shown, the device further includes a beam splitting component 25; the beam splitting component 25 is disposed on the optical path between the digital micromirror device 121 and the object to be measured 4, and at least part of the polarized light reflected by the digital micromirror device 121 is irradiated to the object to be measured 4 through the beam splitting component 25 at least, and the polarized light reflected by the object to be measured 4 enters the imaging component 13 through the beam splitting component 25 at least.

[0046] In a possible implementation manner of the present invention, the imaging component 13 at least includes: an analyzer 131 and a camera 133. The light reflected by the object to be measured enters the camera 133 after passing through the analyzer 131, and the camera 133 performs imaging according to the received polarized light.

[0047] Further, the imaging component 13 may further include: a first lens component 132. The first lens component 132 is disposed in the optical path between the object 4 to be measured and the camera 133.

[0048] Figure 3 This is a schematic diagram of magnetic domain imaging provided by an embodiment of the present invention. As Figure 3 shown, the object to be measured irradiated by the magnetic domain imaging device with the adjustable illumination area can form an unilluminated area and an illumination spot through targeted control of the digital micromirror device to meet the detection requirements.

[0049] In addition, for the magnetic domain imaging device with an adjustable illumination area provided by the embodiment of the present invention, due to the flexible light control ability of the digital micromirror device, the complexity of calibration and alignment is greatly reduced, making the loading and unloading process more rapid and convenient, and can greatly improve the work efficiency.

[0050] Each embodiment in the present invention is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0051] The above specifically describes certain embodiments of the present invention. Additionally, the processes depicted in the figures do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0052] The above are only the embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various modifications and changes can be made to the embodiments of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention shall be included in the protection scope of the present invention.

Claims

1. A magnetic domain imaging device with an adjustable illumination area, characterized in that, The device includes: a light generation component, an optical path adjustment component, and an imaging component; The light generation component is used to generate polarized light; The light generation component at least includes: a laser light source and a polarizer; the laser light source is used to generate illumination light; the polarizer is arranged in the optical path of the illumination light and converts the illumination light into polarized light; The optical path adjustment component includes a prism and a digital micromirror device, and the polarized light is transmitted to the digital micromirror device through the prism; the light generation component further includes a collimator, and the collimator is arranged in the optical path of the illumination light generated by the laser light source and is used to convert the illumination light into a parallel light beam to ensure that the polarized light incident on the digital micromirror device is parallel light; At least part of the polarized light is reflected by the micromirrors on the digital micromirror device to the object to be measured; the digital micromirror device is configured such that when a given control signal sequence is written into the circuit of the digital micromirror device, the area position on the digital micromirror device that can reflect in a preset direction of the object to be measured can be controlled, so as to realize the reflection of the incident light by the reflection units in the preset area; The optical path between the light generation component and the object to be measured is a critical illumination optical path; The imaging component is arranged in the reflection optical path of the polarized light reflected by the object to be measured; the imaging component at least includes: a camera; the camera forms an image according to the received polarized light; The optical path adjustment component further includes: a light trap; The digital micromirror device reflects at least part of the polarized light to the object to be measured, and at least another part of the polarized light is reflected to the light trap, and the light trap is used to absorb the light it receives; 2. The magnetic domain imaging device with adjustable illumination area according to claim 1, wherein The polarized light is incident on the object to be measured obliquely; 3. The magnetic domain imaging device with an adjustable illumination area according to claim 1, characterized in that, The device further includes a beam splitting component; The beam splitting component is arranged on the optical path between the digital micromirror device and the object to be measured, and at least part of the polarized light reflected by the digital micromirror device is irradiated to the object to be measured through the beam splitting component at least, and the polarized light reflected by the object to be measured enters the imaging component through the beam splitting component at least; 4. The magneto-domain imaging device with adjustable illumination area according to claim 1, characterized in that, The light generation component further includes: an optical fiber and an optical fiber output device; The optical fiber is connected to the laser light source and is used to transmit the illumination light generated by the laser light source; The optical fiber output device is arranged at the end of the optical fiber and is used to emit the illumination light transmitted by the optical fiber to the polarizer; 5. The magnetic domain imaging device with an adjustable illumination area according to claim 1, characterized in that, The imaging component at least further includes: an analyzer; The light reflected by the object to be measured enters the camera after passing through the analyzer; 6. The magnetic domain imaging device with adjustable illumination area according to claim 1, characterized in that, The imaging component further includes: a first lens assembly; The first lens assembly is arranged in the optical path between the object to be measured and the camera; 7. The magnetic domain imaging device with adjustable illumination area according to claim 1, characterized in that, The optical path adjustment component further includes a condenser; The condenser is at least arranged in the optical path between the digital micromirror device and the object to be measured;

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