Optical filter switching device and photoelectric imaging equipment

Abstract

The utility model discloses an optical filter switching device and photoelectric imaging equipment. The optical filter switching device comprises a base, a driving motor assembly, an intermediate transmission assembly and an optical filter assembly, the driving motor assembly comprises a driving motor and a driving gear; the driving motor is mounted on the base, and the driving gear is connected with the driving motor; the intermediate transmission assembly comprises an intermediate transmission shaft, a transmission shaft bearing and an intermediate transmission gear; the intermediate transmission shaft is mounted on the base through the transmission shaft bearing; the intermediate transmission gear is mounted on the intermediate transmission shaft and meshed with the driving gear; the optical filter assembly comprises an optical filter set auxiliary support, a first optical filter set rotating shaft bearing, a second optical filter set rotating shaft bearing, an optical filter set rotating shaft, an optical filter set gear, an optical filter lens base, an optical filter and a limiting mechanism. The light filter group gear is installed on the light filter group rotating shaft and is engaged with the intermediate transmission gear. The light filter lens base is installed on the light filter group rotating shaft. By arranging the intermediate transmission gear, the driving part and the transmission part can be prevented from occupying the space of the main light path.

Description

TECHNICAL FIELD

[0001] The utility model belongs to photoelectric imaging technical field, concretely relates to a kind of high position precision optical filter switching device and photoelectric imaging equipment for photoelectric imaging. BACKGROUND

[0002] In the field of photoelectric imaging, optical filter is usually used to adjust the wavelength range of passing light, to realize selective imaging of target, and is widely used. Usually, multiple optical filters are set to switch, and the required optical filter is cut into the optical path of optical system by switching device to realize the required function.

[0003] In order to cut the optical filter into the main optical path of optical system, the driving motor is close to the optical path in common optical filter switching device, and the driving motor is easy to affect the main optical path in space, causing interference, so that the optical system usually reserves a larger space for placing the optical filter switching device, resulting in that the optical system is not compact enough. UTILITY MODEL CONTENT

[0004] The utility model aims at providing an optical filter switching device and photoelectric imaging equipment, by setting intermediate transmission gear, the driving motor is separated from the main optical path in space, which can avoid the driving part and transmission part occupying the space of main optical path, realize the compactness of optical system with optical filter, and also avoid the influence of driving motor on optical filter rotation accuracy. In addition, the intermediate transmission shaft and optical filter rotating shaft are supported by bearing, so that the optical filter rotates more stably, and the position accuracy of optical filter is higher.

[0005] The first aspect of the utility model provides an optical filter switching device, which comprises a base, a driving motor assembly, an intermediate transmission assembly and an optical filter assembly with an optical filter. Wherein:

[0006] The driving motor assembly comprises a driving motor and a driving gear. The driving motor is installed on the base, the driving gear is connected with the output shaft of the driving motor, and the driving motor is equipped with an encoder.

[0007] The intermediate transmission assembly comprises an intermediate transmission shaft, a transmission shaft bearing and an intermediate transmission gear. The intermediate transmission shaft is installed on the base through the transmission shaft bearing, and the intermediate transmission gear is installed on the intermediate transmission shaft and engaged with the driving gear.

[0008] The filter assembly comprises a filter group auxiliary support, a first filter group rotating shaft bearing, a second filter group rotating shaft bearing, a filter group rotating shaft, a filter group gear, a filter lens seat, a filter and a limiting mechanism; the filter group auxiliary support is installed on the base, the first filter group rotating shaft bearing is installed on the base, the second filter group rotating shaft bearing is installed on the filter group auxiliary support, the filter group rotating shaft is installed on the base and the filter group auxiliary support through the first filter group rotating shaft bearing and the second filter group rotating shaft bearing respectively, the filter group gear is installed on the filter group rotating shaft and engaged with the intermediate transmission gear, the filter lens seat is installed on the filter group rotating shaft, and the filter is located in the hole corresponding to the filter lens seat.

[0009] The limiting mechanism comprises an adjustable switch lever and a limiting switch; the adjustable switch lever is installed on the filter lens seat, the adjustable switch lever is adjusted in position through the kidney-shaped groove to adjust the rotation limit of the filter lens seat, and then the limit position of the filter is adjusted, and the limiting switch is located on the filter group auxiliary support and opposite to the adjustable switch lever.

[0010] In some embodiments, the driving motor assembly further comprises a motor seat; the driving motor is installed on the motor seat, and the motor seat is installed on the base.

[0011] In some embodiments, the driving motor is installed on the motor seat through a screw, and the motor seat is installed on the base through a screw.

[0012] In some embodiments, the driving gear is connected with the output shaft of the driving motor through a pin, and the intermediate transmission gear is installed on the intermediate transmission shaft through a pin.

[0013] In some embodiments, the intermediate transmission assembly further comprises a transmission shaft pressing ring and a transmission shaft bearing pressing plate; the transmission shaft pressing ring presses the transmission shaft bearing against the intermediate transmission shaft, and the transmission shaft bearing pressing plate fixes the transmission shaft bearing on the base.

[0014] In some embodiments, the filter group auxiliary support is installed on the base through a screw, and the filter lens seat is installed on the filter group rotating shaft through a screw.

[0015] In some embodiments, the filter assembly further comprises a filter group rotating shaft pressing block and a filter group rotating shaft bearing pressing cover; the filter group rotating shaft pressing block presses the filter group gear against the filter group rotating shaft, and the filter group rotating shaft bearing pressing cover presses the second filter group rotating shaft bearing against the filter group auxiliary support.

[0016] In some embodiments, the filter is bonded in the hole corresponding to the filter lens seat by using silicon rubber.

[0017] In some embodiments, the adjustable switch lever and the limiting switch are both two.

[0018] According to the second aspect of the utility model, provide a kind of photoelectric imaging equipment, which includes the filter switching device of any one in the first aspect.

[0019] Overall, the above technical solutions conceived by the utility model compared with prior art can achieve the following beneficial effects:

[0020] The utility model discloses a middle transmission gear is set, drive motor and main light path are separated in space, can avoid that drive part and transmission part occupy the space of main light path, the interval requirement reserved in main light path for placing filter is very low, and 3mm interval reserved in main light path can, the compactness of optical system with filter is realized.

[0021] Further, the present scheme also contains middle transmission shaft, avoids the influence of filter rotation of drive motor's excursion;Transmission shaft and filter rotating shaft are designed bearing support, so that filter rotates more stably, and filter position precision is higher. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The structure of the filter switching device provided by the embodiment of the application is shown in the schematic diagram.

[0023] Figure 2 The assembly of the drive motor provided by the embodiment of the application is shown in the schematic diagram.

[0024] Figure 3 The assembly of the intermediate transmission provided by the embodiment of the application is shown in the schematic diagram.

[0025] Figure 4 The first schematic diagram of the filter assembly provided by the embodiment of the application is shown in the schematic diagram.

[0026] Figure 5 The second schematic diagram of the filter assembly provided by the embodiment of the application is shown in the schematic diagram.

[0027] In the figure: 1-drive motor assembly, 2-base, 3-intermediate transmission assembly, 4-filter assembly, 11-drive motor, 12-drive gear, 13-pin, 14-motor base, 31-intermediate transmission gear, 32-intermediate transmission shaft, 33-transmission shaft compression ring, 34-transmission shaft bearing, 35-transmission shaft bearing pressing plate, 401-filter, 402-filter mirror seat, 403-filter group rotating shaft compression block, 404-filter group rotating shaft, 405-filter group gear, 406-first filter group rotating shaft bearing, 407-filter group auxiliary support, 408-first filter group rotating shaft bearing, 409-filter group rotating shaft bearing compression cover, 410-screw, 411-first switch lever, 412-second switch lever, 413-limit switch. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will make further detailed description to the utility model combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model. Based on the examples provided in the present application, all other examples obtained by those of ordinary skill in the art without creative labor fall within the scope of the utility model.

[0029] Obviously, the drawings in the following description are only some examples or embodiments of the present application, and for those of ordinary skill in the art, the present application can be applied to other similar scenarios without creative labor on the basis of these drawings. In addition, it can be understood that although the efforts made in this development process can be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacture or production changes on the basis of the technical content disclosed in the present application are only routine technical means, and should not be understood as insufficient disclosure of the content disclosed in the present application.

[0030] In the present application, "example" means that the specific features, structures or characteristics described in connection with the example can be included in at least one example of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same example, nor is it an independent or alternative example that is not mutually exclusive with other examples. It is explicitly and implicitly understood by those of ordinary skill in the art that the examples described in the present application can be combined with other examples without conflict.

[0031] Unless otherwise defined, technical terms and scientific terms used in the present application shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terms "a", "an", "one", "this", and similar referents in the context of describing the application are to be construed to be inclusive, not exclusive. For example, the use of the term "comprises" or "comprising" or "includes" or "including" or "has" or "having" or "contains" or "containing" or "consists" or "consisting" or "consists of" or "consisting of" in the context of describing a process, method, system, product or apparatus are not to be construed as limiting the process, method, system, product or apparatus to consist only of the listed steps or elements, but rather to include other steps or elements not listed, or to include other steps or elements in addition to the listed steps or elements. The terms "connected", "coupled", "in communication with" and similar terms in the context of this application are not to be construed as being limited to physical or mechanical connections, but rather can include electrical connection whether direct or indirect. The term "plurality" means two or more. The term "and / or" describes association between name objects. For example, "A and / or B" can mean A alone, A and B together, or B alone. The character " / " generally means "or". The terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not represent a specific order of the objects.

[0032] Figure 1 A structural component diagram of a filter switching device is provided in the embodiments of the present application. As shown in Figure 1 , the filter switching device of the embodiments of the present application mainly comprises a base 2, a driving motor assembly 1, an intermediate transmission assembly 3, and a filter assembly 4 provided with filters.

[0033] The driving motor assembly 1 comprises a driving motor 11, a motor base 14, and a driving gear 12. The driving motor 11 is installed on the motor base 14 by screws, and the driving gear 12 is connected to the output shaft of the driving motor 11 by a pin 13. The driving motor assembly 1 is installed on the base 2 by screws, as shown in Figure 2 . The driving motor 11 is provided with an encoder, which can control the rotation angle of the output shaft and record the rotation angle value.

[0034] The intermediate transmission assembly 3 comprises an intermediate transmission shaft 32, an intermediate transmission gear 31, a transmission shaft pressing ring 33, a transmission shaft bearing 34, and a transmission shaft bearing pressing plate 35. The intermediate transmission gear 31 is installed on the intermediate transmission shaft 32 by a pin, the transmission shaft pressing ring 33 presses the transmission shaft bearing 34 on the intermediate transmission shaft 32, and the transmission shaft bearing pressing plate 35 presses the transmission shaft bearing 34 on the base 2. The intermediate transmission shaft 32 can be firmly fixed on the base 2 and rotate smoothly, as shown in Figure 3 .

[0035] The filter assembly 4 includes a filter 401, a filter lens mount 402, a filter group rotation shaft pressure block 403, a filter group rotation shaft 404, a filter group gear 405, a first filter group rotation shaft bearing 406, a filter group auxiliary support 407, a second filter group rotation shaft bearing 408, a filter group rotation shaft bearing cover 409, a first switch lever 411, a second switch lever 412, a limit switch 413, etc. Figure 4 As shown. The filter assembly rotating shaft clamping block 403 presses the filter assembly gear 405 onto the filter assembly rotating shaft 404. The filter assembly auxiliary support 407 is firmly installed on the base 2 with screws. The first filter assembly rotating shaft bearing 406 is installed on the base 2, and the second filter assembly rotating shaft bearing 408 is installed on the filter assembly auxiliary support 407 and pressed tightly by the filter assembly rotating shaft bearing cover 409. One end of the filter assembly rotating shaft 404 passes through the inner hole of the first filter assembly rotating shaft bearing 406, and the other end passes through the inner hole of the second filter assembly rotating shaft bearing 408, allowing it to rotate smoothly between the base 2 and the filter assembly auxiliary support 407 without axial movement. The filter 401 is firmly bonded to the corresponding hole of the filter lens holder 402 using silicone rubber, and the filter lens holder 402 is connected to the filter assembly rotating shaft 404 using screws. Figure 5 As shown, to achieve mechanical limiting of rotational motion, a limit switch 413 and switch levers (first switch lever 411, second switch lever 412) are designed. At the two extreme positions of rotation, the switch levers (first switch lever 411, second switch lever 412) will trigger the limit switch 413, causing the motor to stop rotating. The switch levers are designed with slots, allowing adjustment of the two extreme positions of the filter by adjusting the position of the switch levers.

[0036] The working principle of this utility model is as follows:

[0037] The output shaft of the drive motor 11 of the drive motor assembly 1 rotates, driving the drive gear 12 to rotate. The drive gear 12 meshes with the intermediate transmission gear 31, driving the intermediate transmission gear 31 to rotate. The intermediate transmission gear 31 meshes with the filter group gear 405, driving the filter group gear 405 to rotate. The rotational motion of the filter group gear 405 is transmitted to the filter lens holder 402 through the filter group rotating shaft 404, allowing the filter lens holder 402 to rotate. Several filters 401 mounted on the filter lens holder 402 can then rotate around the filter group rotating shaft 404, switching to positions on the main optical path axis. When the filters 401 at both ends of the filter lens holder 402 have rotated to their respective positions, the limit switch 413 can be triggered by the switch levers (first switch lever 411, second switch lever 412) to generate a control signal that stops the drive motor 11 from rotating. Once the two middle filters 401 are in place, the current motor rotation angle value can be recorded by the encoder of the drive motor 11, thereby achieving precise positioning of the two middle filters 401.

[0038] The filter assembly rotation shaft 404 is supported by two bearings (first filter assembly rotation shaft bearing 406 and second filter assembly rotation shaft bearing 408), ensuring good rotational stability and preventing axial movement and circumferential wobbling, thus guaranteeing high precision in positioning the filter 401. An intermediate transmission assembly 3 is provided to separate the drive motor assembly 1 from the filter assembly 4, preventing interference between the drive motor assembly 1 and the main optical path of the optical system. The filter 401 occupies no more than 3mm of space along the optical axis of the main optical path, effectively shortening the length of the main optical path and making the optical system more compact.

[0039] In addition, this application also provides an optoelectronic imaging device, which includes the filter switching device described in any one of the above embodiments.

[0040] In summary, this utility model provides a high-position-precision filter switching device and an optoelectronic imaging device for photoelectric imaging. The filter switching device includes a base, a drive motor, an intermediate transmission assembly, and a lens mount housing the filters. The drive motor is fixed to the base, and a drive gear is mounted on the motor output shaft. The intermediate transmission assembly includes an intermediate shaft and an intermediate gear, with the intermediate gear mounted on the intermediate shaft. The intermediate shaft is connected to the base via a rolling bearing, allowing it to rotate on the base. Several filters are mounted in corresponding mounting holes on the lens mount. The lens mount is connected to the lens mount shaft and then to the base via two bearings, allowing the lens mount to rotate on the base. By properly positioning this mechanism, the optical axis of the filters can be aligned with the optical axis of the optical system. The drive motor carries an angle encoder, and the motor rotation angle when each filter is inserted is determined by the code value recorded by the encoder. Because the rotation axis of the filter mount is supported by two bearings, the rotational motion is more accurate than that without bearing support. In addition, there is an intermediate transmission gear between the drive motor and the filter mount, so the runout of the drive motor output shaft will not be transmitted to the filter mount, thus ensuring the high positional accuracy of the filter.

[0041] It should be noted that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. In addition, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of steps / components can be combined into new steps / components to achieve the purpose of this utility model.

[0042] It will be readily understood by those skilled in the art that the above-described embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A filter switching device, characterized in that, The device includes a base, a drive motor assembly, an intermediate transmission assembly, and a filter assembly containing filters; wherein: The drive motor assembly includes a drive motor and a drive gear; the drive motor is mounted on a base, the drive gear is connected to the output shaft of the drive motor, and the drive motor is equipped with an encoder; The intermediate transmission assembly includes an intermediate transmission shaft, a transmission shaft bearing, and an intermediate transmission gear; the intermediate transmission shaft is mounted on the base via the transmission shaft bearing, and the intermediate transmission gear is mounted on the intermediate transmission shaft and meshes with the drive gear. The filter assembly includes a filter group auxiliary support, a first filter group rotating shaft bearing, a second filter group rotating shaft bearing, a filter group rotating shaft, a filter group gear, a filter lens holder, a filter, and a limiting mechanism. The filter group auxiliary support is mounted on a base, the first filter group rotating shaft bearing is mounted on the base, the second filter group rotating shaft bearing is mounted on the filter group auxiliary support, the filter group rotating shaft is mounted on the base and the filter group auxiliary support respectively via the first and second filter group rotating shaft bearings, the filter group gear is mounted on the filter group rotating shaft and meshes with an intermediate transmission gear, the filter lens holder is mounted on the filter group rotating shaft, and the filter is located in the corresponding hole of the filter lens holder. The limiting mechanism includes an adjustable switch lever and a limit switch. The adjustable switch lever is installed on the filter lens mount. The position of the adjustable switch lever is adjusted through the slot to adjust the rotation limit of the filter lens mount, thereby adjusting the limit position of the filter. The limit switch is located on the auxiliary support of the filter assembly and is opposite to the adjustable switch lever.

2. The filter switching device according to claim 1, characterized in that, The drive motor assembly also includes a motor mount; the drive motor is mounted on the motor mount, and the motor mount is mounted on the base.

3. The filter switching device according to claim 2, characterized in that, The drive motor is mounted on the motor mount with screws, and the motor mount is mounted on the base with screws.

4. The filter switching device according to claim 1, characterized in that, The drive gear is connected to the output shaft of the drive motor by a pin, and the intermediate transmission gear is mounted on the intermediate transmission shaft by a pin.

5. The filter switching device according to claim 1, characterized in that, The intermediate transmission assembly also includes a transmission shaft pressure ring and a transmission shaft bearing pressure plate; the transmission shaft pressure ring presses the transmission shaft bearing against the intermediate transmission shaft, and the transmission shaft bearing pressure plate fixes the transmission shaft bearing on the base.

6. The filter switching device according to claim 1, characterized in that, The filter assembly auxiliary support is mounted on the base with screws, and the filter lens mount is mounted on the filter assembly rotating shaft with screws.

7. The filter switching device according to claim 1, characterized in that, The filter assembly also includes a filter group rotating shaft pressure block and a filter group rotating shaft bearing cover; the filter group rotating shaft pressure block presses the filter group gear against the filter group rotating shaft, and the filter group rotating shaft bearing cover presses the second filter group rotating shaft bearing against the filter group auxiliary support.

8. The filter switching device according to claim 1, characterized in that, The filter is bonded to the corresponding hole in the filter mount using silicone rubber.

9. The filter switching device according to claim 1, characterized in that, There are two adjustable switch levers and two limit switches.

10. A photoelectric imaging device, characterized in that, The photoelectric imaging device includes the filter switching device as described in any one of claims 1 to 9.

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