Multi-layer dip-angle-adjustable filter wheel device

Abstract

The utility model provides a multi-layer inclination-angle-adjustable filter wheel device. The multi-layer inclination-angle-adjustable filter wheel device comprises a first-layer filter wheel and a second-layer filter wheel, a second layer of filter wheel; the gear motor drives the filter wheel to rotate; the filter wheel comprises a filter wheel main body which is provided with a plurality of rectangular mounting grooves for mounting optical filters; the light filtering mounting fan blades are mounted in the rectangular mounting grooves through fixing bolts; an optical filter is arranged on the simple lens frame, and the simple lens frame is mounted on the optical filter mounting fan blade; and the optical filter clamping pieces are matched with the optical filter mounting fan blades and fix the simple lens frame through fastening bolts. According to the utility model, inclination angle adjustment of each optical filter is realized through a simple mechanical structure, the measurement effect of AO I free conversion is realized, the structure is compact, the method is simple and easy to operate, and lubrication or replacement of quick-wear parts is not needed.

Description

Technical Field

[0001] This utility model relates to the field of optical technology, and in particular to a multi-layer tilt-adjustable filter wheel device. Background Technology

[0002] In existing technologies, most filter wheels are single-layer structures with a single filter element, and they are mostly equipped with bandpass filters. The filtering range of standard bandpass filters is mostly fixed, and highly customized filtering cannot be achieved without a custom-made bandpass filter. Therefore, to achieve a dual-layer filtering effect, dual-motor control is often used, with each motor controlling one filter wheel independently. This brings corresponding problems: firstly, it is difficult to achieve good synchronization, and secondly, the addition of redundant motors makes the structure more cumbersome.

[0003] When an optical interference filter deviates from the normal, the transmission spectrum undergoes a "blue shift," meaning the spectral characteristics shift towards shorter wavelengths. This incident angle shift becomes more pronounced with increasing optical interferometry. Due to Fresnel reflection, the filter's spectrum does not shift uniformly across all polarization states. When abnormal incident light strikes the interface between two different media with unequal refractive indices, the amount of transmitted or reflected light varies depending on the polarization state.

[0004] If it is necessary to evaluate the performance of the filter at a non-zero incident angle, or in certain specific environments, the filter needs to be deflected at a certain angle, which is difficult to achieve in conventional filter wheel solutions, this patent provides a double-layer tilt-adjustable filter wheel device.

[0005] In the existing technology CN221883977U, the filter wheel is a double-layer filter wheel that rotates through gear transmission. The transmission efficiency and transmission accuracy cannot be guaranteed. Furthermore, it is necessary to ensure the coaxial accuracy of both sides of the cylindrical boss. Therefore, it also includes components such as electromagnetic sensors and electromagnetic induction devices, making the structure relatively complex. Regular lubrication of gears, bearings, etc. is required to ensure normal operation. In addition, the filter in the filter wheel cannot be deflected.

[0006] The existing technology CN117031864A describes a multi-layer filter wheel structure that uses a servo motor and two filter wheels, achieving different rotational speeds for the two filter wheels through the gear tooth ratio. However, using gear transmission for rotation also results in inconsistent transmission efficiency and accuracy, requires regular lubrication of bearings and gears, and prevents the filters within the filter wheels from deflecting. Utility Model Content

[0007] To solve the above problems, this utility model provides a multi-layer tilt angle adjustable filter wheel device, characterized in that it includes:

[0008] The first filter wheel layer and the second filter wheel layer each include multiple filter wheels and multiple adjustable tilt angle filters, wherein each filter wheel includes:

[0009] The filter wheel body has multiple rectangular mounting slots for mounting the adjustable tilt filter;

[0010] The filter mounting fan is installed in the rectangular mounting slot by fixing bolts;

[0011] A simple lens holder, on which the adjustable tilt filter is mounted, and installed on the filter mounting fan; and

[0012] A filter clip, which, together with the filter mounting fan, clamps the simple lens holder via a set bolt; and

[0013] A geared motor is configured to drive the filter wheel to rotate.

[0014] In one embodiment of this utility model, the filter mounting fan is a U-shaped fan with a groove, and the filter clip is a U-shaped clip with a corresponding groove. The filter mounting fan and the filter clip are fixed to the simple lens frame by a set bolt.

[0015] In another embodiment of the present invention, the multi-layer tilt-adjustable filter wheel device further includes a mounting flange, and the geared motor is side-positioned through the mounting flange.

[0016] In another embodiment of the present invention, the mounting flange has a locating pin and a mounting nut for installing the multi-layer tilt-adjustable filter wheel device to a fixed position.

[0017] In another embodiment of this utility model, the multi-layer tilt-adjustable filter wheel device further includes a motor coupling, which is fitted with the geared motor and locked by a set nut.

[0018] In another embodiment of this utility model, the filter wheel is sleeved on the motor coupling, and a sleeve is installed between the first filter wheel layer and the second filter wheel layer to adjust the interval between the filter wheels.

[0019] In another embodiment of this utility model, the multi-layer tilt-adjustable filter wheel device further includes a locking nut, which is screwed into the motor coupling to provide axial positioning for the filter wheel through pressure.

[0020] In another embodiment of this utility model, the first filter wheel layer is a high-pass filter, and the second filter wheel layer is a low-pass filter.

[0021] In another embodiment of the present invention, the filter wheel layer has a coupling milled groove hole for driving the filter wheel layer to rotate.

[0022] In another embodiment of this utility model, the end of the motor coupling is shorter than the filter wheel layer.

[0023] This utility model has the following beneficial effects:

[0024] (1) A wider range, higher precision, and greater degree of freedom of filtering effect can be achieved by replacing the bandpass filter with a low-pass + high-pass filter.

[0025] (2) The tilt angle of each filter can be adjusted through a simple mechanical structure, so as to achieve the measurement effect of free conversion of AO I. At the same time, the structure is compact, the method is simple and easy to operate, and there is no need for lubrication or replacement of vulnerable parts. Attached Figure Description

[0026] Figure 1 This paper shows a schematic diagram of the overall structure of a multi-layer tilt-adjustable filter wheel device according to an embodiment of this application;

[0027] Figure 2 A schematic diagram of the filter wheel structure in one embodiment of this application is shown;

[0028] Figure 3 An isometric side view of the filter wheel body in one embodiment of this application is shown;

[0029] Figure 4 An isometric side view of a filter mounting fan blade in one embodiment of this application is shown;

[0030] Figure 5 An isometric side view of a filter clip according to an embodiment of this application is shown; and

[0031] Figure 6 An isometric side view of a simplified lens holder according to an embodiment of this application is shown. Specific Implementation

[0032] In the following description, the present invention is described with reference to various embodiments. However, those skilled in the art will recognize that the embodiments may be practiced without one or more specific details or with other alternatives and / or additional methods, materials, or components. In other instances, well-known structures, materials, or operations are not shown or described in detail so as not to obscure the inventive aspects of the present invention. Similarly, for illustrative purposes, specific quantities, materials, and configurations are set forth to provide a comprehensive understanding of embodiments of the present invention. However, the present invention is not limited to these specific details. Furthermore, it should be understood that the embodiments shown in the accompanying drawings are illustrative representations and are not necessarily drawn to scale.

[0033] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not expressly or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as expressing or implying relative importance.

[0034] In this specification, references to "an embodiment" or "this embodiment" mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in at least one embodiment of the present invention. The phrase "in one embodiment" appearing throughout this specification does not necessarily refer to all of the same embodiment.

[0035] Figure 1 A schematic diagram of the overall structure of a multi-layer tilt-adjustable filter wheel device according to an embodiment of this application is shown. The multi-layer tilt-adjustable filter wheel device has the following components:

[0036] The first filter wheel layer and the second filter wheel layer each include multiple filter wheels 07 and multiple adjustable tilt angle filters 75. The first filter wheel layer uses a high-pass filter, and the second filter wheel layer uses a low-pass filter. In this embodiment, both the first filter wheel layer and the second filter wheel layer include only a single filter wheel. However, the actual number of filter wheels included in the filter wheel layer and the distance between the filter wheels can be determined according to specific requirements, taking into account the optical path and the torque intensity of the motor. This utility model does not limit this, and the first filter wheel layer and the second filter wheel layer can be defined according to actual requirements.

[0037] A geared motor 01 has a motor coupling 05, which is fitted onto the geared motor 01 and locked by a set nut 06. A filter wheel 07 is fitted onto the motor coupling 05, and a sleeve 09 is installed in the middle to adjust the spacing between the filter wheels 07, thereby allowing the geared motor 01 to drive the filter wheel 07 to rotate. A locking nut 08 is screwed into the motor coupling 05 and provides axial positioning of the filter wheel 07 through pressure.

[0038] Mounting flange 02 has a locating pin 04 and a mounting nut 03, through which the geared motor 01 is laterally positioned.

[0039] like Figure 1As shown, the geared motor 01 is side-positioned via the mounting flange 02. The bottom surface of the geared motor 01 does not directly contact the bottom surface of the mounting flange 02 to ensure accuracy. The device is fixed in a designated position via the locating pin 04 and the mounting nut 03. The motor coupling 05 engages with the geared motor 01 and is locked by the set nut 06. Two sets of filter wheels 07 are fitted onto the motor coupling 05, with a sleeve 09 installed in between. The length of the sleeve 09 is selected according to the required spacing between the two filters. Finally, the locking nut 08 is screwed into the motor coupling 05, providing axial positioning of the filters through clamping force. The dual filter wheels are driven by a single geared motor 05, ensuring the synchronous repeatability of the filter wheels 07.

[0040] In another embodiment of this utility model, the geared motor 01 can also be replaced by other transmission mechanisms, such as servo motors, rotary motors, gear transmissions, etc., and the rotation of the filter wheel 71 can be achieved by various methods.

[0041] Figure 2 A schematic diagram of the filter wheel structure in one embodiment of this application is shown.

[0042] like Figure 2 As shown, 71 is the main body of the filter wheel. The main body 71 has six rectangular mounting slots. The filter mounting fan 72 is fixed in the slots of the main body 71 by fixing bolts 77. The filter 75 is attached to the simple lens holder 74 with UV adhesive. The advantage of using UV adhesive is that it achieves compactness and can also provide some heat compensation. The simple lens holder 74 is inserted into the U-shaped groove of the filter mounting fan 72. The arc groove of the filter clip 73 is aligned with the bracket of the simple lens holder 74, and the set bolt 76 is tightened to complete the fixation. Then, the coupling groove 78 of the filter 75 is aligned with the shaft tolerance of the coupling 05 to install the filter wheel 71. This process is repeated until the second filter wheel is installed, for a total of 12 filters. Finally, the locking nut 08 is tightened, and the entire system is installed.

[0043] In another embodiment of this utility model, the filter 75 is fixed in the simple lens holder 74 by means of thread fixing, flange fixing or other methods.

[0044] Figure 4 An isometric side view of the filter mounting fan blade in one embodiment of this application is shown, and Figure 5 An isometric side view of a filter clip according to an embodiment of this application is shown.

[0045] like Figure 4 and Figure 5 As shown, the filter mounting fan 72 has a U-shaped slot, and the filter clip 73 is a U-shaped clip of the corresponding shape. The two are fixed to the simple lens frame 74 by a set bolt 76.

[0046] In one embodiment of this utility model, after the first filter wheel layer, sleeve 09 and second filter wheel layer are mounted on the coupling 05, the end of the coupling 05 is slightly shorter than the filter wheel 71. Tightening the locking nut 08 in this way can secure it by the clamping force between the threads.

[0047] After 72, 73, and 74 are assembled, there should be a gap between the filter mounting fan 72 and the filter clamp 73. Then, the filter can be tightened by locking it with the set bolt 76, allowing it to be pressed firmly through the two grooves. Figure 6 The cylindrical bracket of the simplified lens holder 74 shown achieves a secure fit. Figure 4 and Figure 5 As shown, the filter mounting fan 72 has a groove 721 for accommodating the cylindrical support of the simple lens holder 74, which cooperates with the groove 731 on the filter clip 73 to fix the simple lens holder 74.

[0048] The milled slot 78 of the coupling is not a round hole but has two straight edges milled out. After the motor shaft is properly fitted with the milled slot, the rotation of the motor shaft drives the coupling 05 to rotate. The rotation of the coupling 05 causes the filter wheel 71 to rotate through the planar compression of the two straight edges of the milled slot, so there is no need to worry about the milled slot slipping.

[0049] The advantage of this invention is that it can adjust the tilt angle of the filter 75. When you want to adjust the tilt angle of the filter 75, first loosen the locking bolt 76 without unscrewing it. At this time, there will be a gap tolerance between the filter mounting fan 72 and the filter clamp 73, which allows the simple lens holder 74 to rotate in the slot to adjust the tilt angle of the filter 75. After the tilt angle is adjusted, tighten the locking nut 76 to complete the adjustment. This adjustment method is simple and easy to implement, and can be adjusted repeatedly.

[0050] In summary, this utility model achieves the following beneficial effects by providing a multi-layer tilt-adjustable filter wheel device:

[0051] (1) Replace the bandpass filter with a low-pass + high-pass filter to achieve a wider range, higher precision and greater degree of freedom in filtering.

[0052] (2) The tilt angle of each filter can be adjusted through a simple mechanical structure, so as to achieve the measurement effect of free conversion of AO I. At the same time, the structure is compact, the method is simple and easy to operate, and there is no need for lubrication or replacement of vulnerable parts.

[0053] While some embodiments of this invention have been described in this application, those skilled in the art will understand that these embodiments are merely illustrative. Numerous variations, alternatives, and improvements will arise in those skilled in the art under the guidance of this application without departing from the scope of this invention. The appended claims are intended to define the scope of this application and thereby cover the methods and structures within the scope of the claims themselves and their equivalents.

Claims

1. A multi-layer tilt-adjustable filter wheel device, characterized in that, include: The first filter wheel layer and the second filter wheel layer each include multiple filter wheels and multiple adjustable tilt angle filters, wherein each filter wheel includes: The filter wheel body has multiple rectangular mounting slots for mounting the adjustable tilt filter; The filter mounting fan is installed in the rectangular mounting slot by fixing bolts; A simple lens holder, on which the adjustable tilt filter is mounted, and installed on the filter mounting fan; and A filter clip, which, together with the filter mounting fan, clamps the simple lens holder via a set bolt; and A geared motor is configured to drive the filter wheel to rotate.

2. The multi-layer tilt-adjustable filter wheel device as described in claim 1, characterized in that, The filter mounting fan is a U-shaped fan with a groove, and the filter clip is a U-shaped clip with a corresponding groove. The filter mounting fan and the filter clip are fixed to the simple lens frame by set bolts.

3. The multi-layer tilt-adjustable filter wheel device as described in claim 1, characterized in that, The multi-layer tilt-adjustable filter wheel device also includes a mounting flange, through which the geared motor is side-positioned.

4. The multi-layer tilt-adjustable filter wheel device as described in claim 3, characterized in that, The mounting flange has a locating pin and a mounting nut for mounting the multi-layer tilt-adjustable filter wheel device to a fixed position.

5. The multi-layer tilt-adjustable filter wheel device as described in claim 1, characterized in that, The multi-layer tilt-adjustable filter wheel device also includes a motor coupling, which is fitted with the geared motor and locked by a set nut.

6. The multi-layer tilt-adjustable filter wheel device as described in claim 5, characterized in that, The filter wheel is fitted onto the motor coupling, and a sleeve is installed between the first filter wheel layer and the second filter wheel layer to adjust the spacing between the filter wheels.

7. The multi-layer tilt-adjustable filter wheel device as described in claim 6, characterized in that, The multi-layer tilt-adjustable filter wheel device also includes a locking nut, which is screwed into the motor coupling to provide axial positioning of the filter wheel through pressure.

8. The multi-layer tilt-adjustable filter wheel device as described in claim 1, characterized in that, The first filter wheel layer uses a high-pass filter, and the second filter wheel layer uses a low-pass filter.

9. The multi-layer tilt-adjustable filter wheel device as described in claim 6, characterized in that, The filter wheel layer has a coupling groove hole for driving the filter wheel layer to rotate.

10. The multi-layer tilt-adjustable filter wheel device as described in claim 9, characterized in that, The end of the motor coupling is shorter than the filter wheel layer.

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