Multi-channel optical filter switching and stacking device

Abstract

The utility model provides a multichannel optical filter switching and stacking device, an optical filter mounting body comprises a mounting cylinder, and a plurality of optical filter mounting holes are uniformly processed on the outer wall of the mounting cylinder in the circumferential direction; a first dual-channel optical filter switching device, a second dual-channel optical filter switching device, a third dual-channel optical filter switching device or a fourth dual-channel optical filter switching device are selectively and correspondingly mounted at the positions of the optical filter mounting holes respectively; after the first dual-channel optical filter switching device, the second dual-channel optical filter switching device, the third dual-channel optical filter switching device or the fourth dual-channel optical filter switching device are installed, all optical filters are converged at the optical filter superposition center of the installation cylinder. The device comprises a plurality of optical filters, each optical filter corresponds to one channel, the corresponding channel can be selected in a free superposition mode, the device can process light rays of various colors or wavelengths at the same time through the design, and the working efficiency and flexibility are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical application, in particular to a multi-channel filter switching and superposition device. Background Art

[0002] The number of spectral channels used in multispectral detection generally ranges from a few to dozens. Traditional multispectral imaging technology is mainly achieved by adding filters in front of the optical system. There are mainly the following ways to achieve the multispectral channel function of filters: (1) voltage (liquid crystal) tunable interferometer cavity filter unit; (2) rotary structure; (3) multi-camera parallel structure; (4) focal plane array structure.

[0003] The development of multi-channel integrated filters has become a hot topic of research in recent years, and some good results have emerged. In terms of structure, it is mainly linear and array, and in terms of film structure, it is mostly FP structure, and there are also some double half-wave structures. The defects of the existing structure are: when a linear structure is adopted, such as CN202121071526, a filter assembly, it is necessary to arrange multiple filters in a linear superposition manner, and it is necessary to pre-select the required filters for installation when using them, but the filter unit of a single module occupies a large space, resulting in a large volume for the entire superposition device; when an array structure is adopted, it is also necessary to selectively arrange and install the required filter units, and the space occupied by the installation and arrangement of the entire array structure is large. In summary, the existing filtering equipment is large in size, high in cost, and it is not easy to realize the switching superposition function. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-channel filter switching and superposition device, which includes multiple filters, each filter corresponds to a channel, and can select the corresponding channel by free superposition. This design enables the device to process multiple colors or wavelengths of light at the same time, thereby improving work efficiency and flexibility; it can realize accurate selection and switching of different wavelengths or colors of light, and has the advantages of small size, low cost, easy control, etc.

[0005] In order to realize the above technical features, the purpose of the utility model is achieved as follows: a multi-channel filter switching and superposition device, comprising a filter installation body, the filter installation body comprising a mounting cylinder, and a plurality of filter installation holes are uniformly processed on the outer wall of the mounting cylinder in a circumferential direction;

[0006] The filter installation holes are selectively and correspondingly installed at the positions where the filter installation holes are located, respectively, with a first dual-channel filter switching device, a second dual-channel filter switching device, a third dual-channel filter switching device or a fourth dual-channel filter switching device;

[0007] After the first dual-channel filter switching device, the second dual-channel filter switching device, the third dual-channel filter switching device or the fourth dual-channel filter switching device is installed, all filters converge at the filter superposition center of the installation cylinder.

[0008] Preferably, the number of filter mounting holes uniformly arranged in the circumferential direction is at least four groups.

[0009] Preferably, there is at least one group of filter mounting holes located in the same busbar direction.

[0010] Preferably, the filter mounting holes of adjacent busbars are arranged in a staggered manner to ensure that no interference occurs after the adjacent first dual-channel filter switching device, second dual-channel filter switching device, third dual-channel filter switching device or fourth dual-channel filter switching device is installed.

[0011] Preferably, the first dual-channel filter switching device, the second dual-channel filter switching device, the third dual-channel filter switching device and the fourth dual-channel filter switching device adopt the same structure, including a filter mounting plate, a lens mounting frame is arranged on the filter mounting plate, and the positions of the lens mounting frames are respectively installed with white filters and coated filters, and a mounting shell is arranged at the tail of the filter mounting plate, an electromagnet is arranged inside the mounting shell, and the white filter and the coated filter are switched by rotating the electromagnet; the head of the filter mounting plate is provided with an arc end, and the arc end is in contact with and cooperates with the inner wall of the mounting cylinder.

[0012] Preferably, an internal thread for mounting a lens is processed on the inner wall of the end of the mounting cylinder where the light inlet is located.

[0013] Preferably, a mounting column is provided on the end surface of the mounting cylinder at the end where the light outlet is located, and an external thread for connecting to an industrial camera is processed on the outer wall of the mounting column.

[0014] Preferably, an end surface of the mounting cylinder at the light inlet is processed with an axially arranged threaded hole, the threaded hole matches the position of the filter mounting hole, and the threaded hole runs through multiple filter mounting holes in the same circumferential direction.

[0015] Preferably, the size of the filter mounting plate matches the size of the filter mounting hole.

[0016] Preferably, the coated filters corresponding to the first dual-channel filter switching device, the second dual-channel filter switching device, the third dual-channel filter switching device and the fourth dual-channel filter switching device are of different types to achieve filtering in different wavelength bands.

[0017] The utility model has the following beneficial effects:

[0018] 1. Multi-channel design: The device of the utility model includes multiple filters, each filter corresponds to a channel. This design enables the device to process multiple colors or wavelengths of light at the same time, improving work efficiency and flexibility.

[0019] 2. Switching device: The switching device is a key component to achieve fast switching of filters. It usually adopts a rotating electromagnet to ensure the stability and accuracy of the filter during the switching process.

[0020] 3.Optimization of optical performance: In order to improve the transmittance of light and the quality of imaging, the filters and switching devices are carefully designed optically. The filters are made of high transmittance and low scattering materials, while the switching device ensures that no additional light loss or distortion is introduced during the switching process.

[0021] 4. Spatial structure optimization: By evenly arranging multiple staggered filter mounting holes on the same mounting cylinder in a circular pattern, each filter mounting hole can selectively insert a dual-channel filter switching device, so that different filters can be selectively used in superposition to achieve the selection of specific colors or wavelengths of light. The entire device has a compact structure, small size, and occupies little space.

[0022] 5. Easy to use: With the help of the switching function of the first dual-channel filter switching device, the second dual-channel filter switching device, the third dual-channel filter switching device, and the fourth dual-channel filter switching device, all the dual-channel filter switching devices can be installed in place in advance. In the subsequent use process, the corresponding filters can be selectively switched, and the use and control are convenient and easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model.

[0025] Figure 2 It is a three-dimensional diagram of the first dual-channel filter switching device, the second dual-channel filter switching device, the third dual-channel filter switching device or the fourth dual-channel filter switching device of the utility model.

[0026] Figure 3 This is a three-dimensional diagram of the filter installation body of the utility model.

[0027] In the figure: a first dual-channel filter switching device 1, a second dual-channel filter switching device 2, a third dual-channel filter switching device 3, a fourth dual-channel filter switching device 4, a filter superposition center 5, a filter mounting body 6, a mounting shell 7, a filter mounting plate 8, an arc end 9, a lens mounting frame 10, a mounting cylinder 11, a filter mounting hole 12, a mounting column 13, and a threaded hole 14. DETAILED DESCRIPTION

[0028] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0029] Embodiment 1:

[0030] 1. The basic principle of the multi-channel filter switching and superposition device of the utility model:

[0031] The working principle of the multi-channel filter switching device is based on the selective transmission characteristics of the filter. Each coated filter is designed to allow only light of a specific wavelength range to pass through, while blocking other wavelengths. The switching device is responsible for quickly and accurately switching different coated filters according to needs, thereby realizing the color or wavelength selection of the incident light.

[0032] The principle of the filter switching device is that through a circuit control board and a switching device, when light passes through the device, the switching device moves the corresponding coated filter into the light path according to a preset instruction or external signal. Subsequently, the light passes through the selected coated filter, and only the light that meets the transmission characteristics of the coated filter can continue to propagate. In this way, the multi-channel filter switching device can realize the selection of light of different colors or wavelengths.

[0033] 2. Multi-channel filter structure design:

[0034] Filter stacking is a common optical processing method. Its principle is to filter or select light of a specific wavelength through the combination of multiple coated filters to achieve a specific optical effect. When multiple coated filters are stacked together, their effects are multiplied.

[0035] Specifically, each coated filter will filter or select the light that passes through it to a certain extent, and when they are used in combination, the effects of these filters or selections will be superimposed on each other, making the light that finally passes through have more specific properties. For example, if a red filter and a green filter are superimposed on each other, only light that can pass through both filters can finally pass through. Since the red and green filters only allow red light and green light to pass through respectively, after the two filters are superimposed, only light with both red and green components will be allowed to pass, that is, yellow light.

[0036] It should be noted that when filters are superimposed, their order may affect the result. Because different filters may have different absorption and reflection characteristics of light, the order of superposition may affect the final light composition and intensity.

[0037] In addition, filter stacking may also bring some additional optical effects, such as light interference and diffraction, etc. These effects may have a certain impact on the final optical effect, so these factors need to be fully considered when using filter stacking.

[0038] In general, the use of filter stacking is an effective optical processing method that can filter and select light of specific wavelengths. In practical applications, it is necessary to select the appropriate filter type and stacking order according to specific needs to achieve the best optical effect.

[0039] Embodiment 2:

[0040] See also Figure 1-3 As shown, a multi-channel filter switching and superposition device comprises a filter mounting body 6, wherein the filter mounting body 6 comprises a mounting cylinder 11, and a plurality of filter mounting holes 12 are uniformly processed on the outer wall of the mounting cylinder 11 in a circumferential direction; the positions of the filter mounting holes 12 are selectively and correspondingly mounted with a first dual-channel filter switching device 1, a second dual-channel filter switching device 2, a third dual-channel filter switching device 3 or a fourth dual-channel filter switching device 4; after the first dual-channel filter switching device 1, the second dual-channel filter switching device 2, the third dual-channel filter switching device 3 or the fourth dual-channel filter switching device 4 are installed, all filters converge at the filter superposition center 5 of the mounting cylinder 11. By adopting the above-mentioned multi-channel filter switching and superposition device, a plurality of filters are included, each filter corresponds to a channel, and the corresponding channel can be selected by free superposition, and multiple colors or wavelengths of light can be processed at the same time, thereby improving work efficiency and flexibility; it can realize accurate selection and switching of different wavelengths or colors of light, and has the advantages of small size, low cost, and easy control.

[0041] Furthermore, the number of filter installation holes 12 uniformly arranged in the circumferential direction is at least four groups. Through multiple groups, corresponding different types of dual-channel filter switching devices can be selectively installed according to requirements, thereby facilitating the subsequent selection of different light beams.

[0042] Furthermore, there is at least one group of filter mounting holes 12 located in the same busbar direction. By using different filter mounting holes 12 in the same busbar direction, it is convenient to adjust the installation sequence of the corresponding dual-channel filter switching device to meet different usage requirements.

[0043] Furthermore, the filter installation holes 12 of adjacent busbars are arranged in a staggered manner to ensure that there is no interference after the adjacent first dual-channel filter switching device 1, second dual-channel filter switching device 2, third dual-channel filter switching device 3 or fourth dual-channel filter switching device 4 are installed. Through the above arrangement, it is ensured that different colors and wavelengths of light can be selectively passed as needed, and different dual-channel filter switching devices can be superimposed and used.

[0044] Furthermore, the first dual-channel filter switching device 1, the second dual-channel filter switching device 2, the third dual-channel filter switching device 3 and the fourth dual-channel filter switching device 4 adopt the same structure, including a filter mounting plate 8, a lens mounting frame 10 is arranged on the filter mounting plate 8, and the positions of the lens mounting frame 10 are respectively correspondingly installed with white filters and coated filters, and the tail of the filter mounting plate 8 is provided with a mounting shell 7, and the interior of the mounting shell 7 is provided with an electromagnet, and the white filter and the coated filter are switched by rotating the electromagnet; the head of the filter mounting plate 8 is provided with an arc end 9, and the arc end 9 is in contact with the inner wall of the mounting cylinder 11. The first dual-channel filter switching device 1, the second dual-channel filter switching device 2, the third dual-channel filter switching device 3 and the fourth dual-channel filter switching device 4 are used to facilitate the subsequent switching of filters.

[0045] Furthermore, an internal thread 15 for mounting a lens is processed on the inner wall of the end of the mounting cylinder 11 where the light inlet is located.

[0046] Furthermore, a mounting column 13 is provided on the end surface of the mounting cylinder 11 at the end where the light outlet is located, and an external thread for connecting to an industrial camera is processed on the outer wall of the mounting column 13 .

[0047] Furthermore, the end surface of the light inlet of the mounting cylinder 11 is processed with an axially arranged threaded hole 14, the threaded hole 14 matches the position of the filter mounting hole 12, and the threaded hole 14 runs through multiple filter mounting holes 12 in the same circumferential direction. The threaded hole 14 facilitates the selection of mounting screws, thereby realizing the locking and fixing of the first dual-channel filter switching device 1, the second dual-channel filter switching device 2, the third dual-channel filter switching device 3 or the fourth dual-channel filter switching device 4, and ensuring the reliability of the installation.

[0048] Furthermore, the size of the filter mounting plate 8 matches the size of the filter mounting hole 12. Through the above-mentioned size matching, it is ensured that the filter mounting plate 8 can be reliably matched and installed later.

[0049] Furthermore, the coated filters corresponding to the first dual-channel filter switching device 1, the second dual-channel filter switching device 2, the third dual-channel filter switching device 3 and the fourth dual-channel filter switching device 4 are of different types to achieve filtering in different wavelength bands.

[0050] Embodiment 3:

[0051] Among them, the first dual-channel filter switching device 1, the second dual-channel filter switching device 2, the third dual-channel filter switching device 3 and the fourth dual-channel filter switching device 4 use switching lenses controlled by rotating electromagnets currently available on the market, the specific model is DC3V-DC5V, and uses rotating electromagnets to switch between white lenses and coated lenses.

[0052] Put four dual-channel filter switching devices into the installation cylinder 11, and eight filters can be superimposed in different ways through the filter automatic superposition device.

[0053] Each dual-channel filter switching device is equipped with filters of different wavelengths, which are automatically switched by rotating electromagnets, so that they can be automatically switched and superimposed according to needs in actual use.

[0054] Embodiment 4:

[0055] The first dual-channel filter switching device 1, the second dual-channel filter switching device 2, the third dual-channel filter switching device 3 and the fourth dual-channel filter switching device 4 can also adopt the existing dual filter switch with trapezoidal strip holes and high retention force disclosed in the existing CN 220691167 U.

[0056] Working process and principle of this utility model:

[0057] When in use, the first dual-channel filter switching device 1, the second dual-channel filter switching device 2, the third dual-channel filter switching device 3 and the fourth dual-channel filter switching device 4 are selectively installed at the location of the filter mounting hole 12, and then fixed with screws. After the fixing is completed, the entire mounting cylinder 11 is installed on the industrial camera, and a lens is installed at the head of the mounting cylinder 11. In the actual light collection process, the filters on the first dual-channel filter switching device 1, the second dual-channel filter switching device 2, the third dual-channel filter switching device 3 and the fourth dual-channel filter switching device 4 are selectively switched according to the needs of use. Each filter is designed to allow only light of a specific wavelength range to pass through, while blocking other wavelengths. The switching device is responsible for quickly and accurately switching different filters according to needs, thereby realizing the color or wavelength selection of the incident light.

Claims

1. A multi-channel filter switching and superposition device, characterized in that: It comprises a filter installation body (6), the filter installation body (6) comprising a installation cylinder (11), and a plurality of filter installation holes (12) are uniformly processed in the circumferential direction on the outer wall of the installation cylinder (11); The filter installation holes (12) are selectively and correspondingly installed with a first dual-channel filter switching device (1), a second dual-channel filter switching device (2), a third dual-channel filter switching device (3) or a fourth dual-channel filter switching device (4); After the first dual-channel filter switching device (1), the second dual-channel filter switching device (2), the third dual-channel filter switching device (3) or the fourth dual-channel filter switching device (4) are installed, all filters converge at the filter superposition center (5) of the installation cylinder (11).

2. A multi-channel filter switching and superposition device according to claim 1, characterized in that: The number of the filter installation holes (12) uniformly arranged in the circumferential direction is at least four groups.

3. A multi-channel filter switching and superposition device according to claim 2, characterized in that: There is at least one group of filter mounting holes (12) located in the same busbar direction.

4. A multi-channel filter switching and superposition device according to claim 3, characterized in that: The filter installation holes (12) of adjacent busbars are arranged in a staggered manner to ensure that adjacent first dual-channel filter switching devices (1), second dual-channel filter switching devices (2), third dual-channel filter switching devices (3) or fourth dual-channel filter switching devices (4) will not interfere with each other after installation.

5. A multi-channel filter switching and superposition device according to claim 4, characterized in that: The first dual-channel filter switching device (1), the second dual-channel filter switching device (2), the third dual-channel filter switching device (3) and the fourth dual-channel filter switching device (4) have the same structure, comprising a filter mounting plate (8), the filter mounting plate (8) being provided with a lens mounting frame (10), the positions of the lens mounting frame (10) being respectively provided with white filters and coated filters, a mounting shell (7) being provided at the tail of the filter mounting plate (8), an electromagnet being provided inside the mounting shell (7), and switching between the white filter and the coated filter by rotating the electromagnet; and an arc-shaped end (9) being provided at the head of the filter mounting plate (8), the arc-shaped end (9) being in contact with and matched with the inner wall of the mounting cylinder (11).

6. The multi-channel filter switching and superposition device according to claim 1, characterized in that: An internal thread (15) for mounting a lens is processed on the inner wall of the end of the mounting cylinder (11) where the light inlet is located.

7. A multi-channel filter switching and superposition device according to claim 6, characterized in that: A mounting column (13) is provided on the end surface of the mounting cylinder (11) at the end where the light outlet is located, and an external thread for connecting to an industrial camera is processed on the outer wall of the mounting column (13).

8. The multi-channel filter switching and superposition device according to claim 4, characterized in that: The end surface of the mounting cylinder (11) at the light inlet is processed with an axially arranged threaded hole (14), the threaded hole (14) matches the position of the filter mounting hole (12), and the threaded hole (14) penetrates a plurality of filter mounting holes (12) in the same circumferential direction.

9. The multi-channel filter switching and superposition device according to claim 5, characterized in that: The size of the filter mounting plate (8) matches the size of the filter mounting hole (12).

10. The multi-channel filter switching and superposition device according to claim 5, characterized in that: The coated filters corresponding to the first dual-channel filter switching device (1), the second dual-channel filter switching device (2), the third dual-channel filter switching device (3) and the fourth dual-channel filter switching device (4) are of different types to achieve filtering of different wavelength bands.

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