CN113126235A - Visual field switching mechanism of infrared optical system and infrared optical system - Google Patents
Visual field switching mechanism of infrared optical system and infrared optical system Download PDFInfo
- Publication number
- CN113126235A CN113126235A CN202110388829.3A CN202110388829A CN113126235A CN 113126235 A CN113126235 A CN 113126235A CN 202110388829 A CN202110388829 A CN 202110388829A CN 113126235 A CN113126235 A CN 113126235A
- Authority
- CN
- China
- Prior art keywords
- field
- assembly
- view
- optical system
- infrared optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/14—Mountings, adjusting means, or light-tight connections, for optical elements for lenses adapted to interchange lenses
- G02B7/16—Rotatable turrets
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/02—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective
- G02B15/04—Optical objectives with means for varying the magnification by changing, adding, or subtracting a part of the objective, e.g. convertible objective by changing a part
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Studio Devices (AREA)
Abstract
The invention provides a view field switching mechanism of an infrared optical system and the infrared optical system. The visual field switching mechanism includes: a bracket and a switching assembly. Wherein, the bracket is provided with a plurality of groups of view field lens components; the switching assembly is arranged on the support and connected with the multiple groups of view field lens assemblies and is used for adjusting the cut-in or cut-out light path of each group of view field lens assemblies. According to the field switching mechanism, the switching-in or switching-out optical path of each group of field mirror assemblies is adjusted through the switching assemblies, so that the switching of different groups of field mirror assemblies is realized, the field switching of the infrared optical system can be realized, and different requirements of specific functions of the infrared optical system on the field can be met through a simple structure.
Description
Technical Field
The invention relates to the field of infrared optical systems, in particular to a view field switching mechanism of an infrared optical system and the infrared optical system.
Background
In recent years, the application range and depth of the infrared imaging technology have been greatly developed. The application field of infrared thermal imaging generally needs an infrared optical system capable of providing a high-magnification small-field image and a low-magnification large-field image simultaneously to complete the searching, aiming and tracking functions of the system on a target. The fixed focus system is difficult to meet the requirement, and the continuous zoom system is the best choice, but has great difficulty in design; compared with a continuous zooming infrared optical system, the two-gear or multi-gear zooming infrared optical system is simpler and more practical.
Disclosure of Invention
The invention aims to solve the technical problems that in the related art, a fixed-focus infrared optical system cannot meet the requirement of providing different view fields, and a continuous zooming infrared optical system is complex in structure and difficult to design.
The field switching mechanism according to the embodiment of the invention comprises: a bracket and a switching assembly. Wherein, the bracket is provided with a plurality of groups of view field lens components; the switching assembly is arranged on the support and connected with the multiple groups of view field lens assemblies and is used for adjusting the cut-in or cut-out light path of each group of view field lens assemblies.
According to the field switching mechanism provided by the embodiment of the invention, the switching-in or switching-out optical paths of all groups of field mirror assemblies are adjusted through the switching assemblies, so that the switching of different field mirror assemblies is realized, the field switching of the infrared optical system can be realized, and different requirements of specific functions of the infrared optical system on the field are met.
According to some embodiments of the invention, a multi-group field lens assembly comprises: the infrared optical system is in a large-view-field working state when the switching component adjusts the first view-field mirror component to cut into the light path; when the switching component adjusts the second view field mirror component to cut into the light path, the infrared optical system is in a middle view field working state; when the switching component adjusts the first view field mirror component and the second view field mirror component to cut out the light paths, the infrared optical system is in a small view field state.
According to the visual field switching mechanism of some embodiments, the first visual field mirror assembly and the second visual field mirror assembly are arranged, and the positions of the visual field mirror assemblies in the optical paths are adjusted to accurately switch among the large visual field, the middle visual field and the small visual field.
In some embodiments of the invention, the switching component comprises: a drive assembly and a transmission assembly. The driving assembly is arranged on the bracket and used for providing power for adjusting the multiple groups of view field lens assemblies; the transmission assembly is connected between the driving assembly and the plurality of groups of view field mirror assemblies, and when the driving assembly runs, the transmission assembly drives and adjusts the plurality of groups of view field mirror assemblies to cut in or cut out the light path.
According to some embodiments of the invention, the drive assembly comprises: the driving motor and the gear train that is connected with driving motor.
In some embodiments of the invention, a gear set comprises: the first straight gear, the second straight gear, the first bevel gear and the second bevel gear. The first straight gear is fixedly connected with a motor shaft of the driving motor; the second straight gear is meshed with the first straight gear; the first bevel gear is fixedly connected with the second straight gear through a flat key; one end of the second bevel gear is meshed with the first bevel gear, and the other end of the second bevel gear is fixedly connected with the transmission assembly.
According to the view field switching mechanism of some embodiments, a single direct current micro motor is used as an execution element, two-stage transmission of a straight gear and a bevel gear is adopted between the motor input and the transmission assembly, and the bevel gear is used for vertical adjustment of a shaft system, so that the requirement of circuit control is simplified, the maximum transmission efficiency is ensured, the gap of light path turning is fully utilized to realize compact layout of the structure, and possible interference to the light path in the view field switching process is avoided.
According to some embodiments of the invention, the transmission assembly comprises: the first transmission shaft assembly, the second transmission shaft assembly and the third transmission shaft assembly. The first transmission shaft assembly is connected with the driving assembly so as to be driven by the driving assembly to rotate; the second transmission shaft assembly is rotatably sleeved in the first transmission shaft assembly, and is connected with the first visual field mirror assembly; the third transmission shaft assembly is rotatably sleeved in the second transmission shaft assembly, and the third transmission assembly is connected with the second visual field lens assembly. When the shifting assembly is matched with the second transmission shaft assembly, the first transmission shaft assembly and the second transmission shaft assembly synchronously rotate to drive the first view mirror assembly to rotate; when the toggle assembly is matched with the third transmission shaft assembly, the first transmission shaft assembly and the third transmission shaft assembly synchronously rotate to drive the second view field mirror assembly to rotate.
According to the view field switching mechanism of some embodiments, the shafting is matched with the toggle assembly, so that the transmission chain is simple and clear, and the circuit control requirement is simplified.
In some embodiments of the present invention, there are two sets of toggle assemblies, each set of toggle assemblies comprising: elastic component and thumb pin. The elastic piece is arranged on the first transmission shaft assembly; the shifting pin is in telescopic fit with the first transmission shaft assembly through the elastic piece. The transmission assembly further includes: and when the first transmission shaft assembly rotates, the shifting pin is switched between the initial state and the extending state under the action of the cam base.
According to some embodiments of the invention, the cam base has a mating step that mates with the deadbolt, the mating step having first and second step faces of different heights.
According to the view field switching mechanism of some embodiments, the view field switching action is realized through the cam mechanism with reasonable design, the transmission chain is simple and clear, and the requirement of circuit control is simplified.
In some embodiments of the invention, the first driveshaft assembly comprises: the periphery wall of first pivot, first pivot is equipped with two guiding bearing along the circumference direction interval, and two sets of subassemblies of stirring are located corresponding guiding bearing respectively.
The invention further provides an infrared optical system, which comprises the view field switching mechanism in any embodiment, and the infrared optical system adjusts the switching-in or switching-out of the optical paths of the multiple groups of view field mirror assemblies through the switching assemblies to realize the switching of different view field working modes.
According to the infrared optical mechanism provided by the embodiment of the invention, the field of view switching of the infrared optical system can be realized by switching the field of view switching mechanism among the multiple groups of field of view mirror assemblies. In addition, a single direct-current micro motor is used as an execution element and is matched with a cam driving mechanism with reasonable design to realize the switching action of the view field, a transmission chain is simple and clear, the requirement of circuit control is simplified, and the design difficulty is reduced; the straight gear-bevel gear two-stage transmission is adopted between the motor input and the transmission assembly, the vertical adjustment of a shaft system is carried out through the bevel gear, the compact layout of the structure is realized by fully utilizing the clearance of the light path deflection while the maximum transmission efficiency is ensured, and the interference possibly generated to the light path in the view field switching process is avoided.
Drawings
FIG. 1 is a schematic view of a field of view mirror assembly in a small field of view state with a field of view switching mechanism according to an embodiment of the present invention;
FIG. 2 is a schematic view of a field of view mirror assembly with a field of view switching mechanism in a mid-field state according to an embodiment of the present invention;
FIG. 3 is a schematic view of the position of the field of view mirror assembly when the field of view switching mechanism is in the wide field of view state in accordance with an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a switching assembly when the field switching mechanism is in a large field state according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a drive assembly according to an embodiment of the present invention;
FIG. 6 is a structural sectional view of the transmission assembly when the field switching mechanism is in a small field state according to the embodiment of the invention;
fig. 7 is a structural sectional view of a switching assembly when the field switching mechanism according to the embodiment of the present invention is in a small field state;
fig. 8 is a structural sectional view of a switching assembly when the field switching mechanism is in a middle field state according to an embodiment of the present invention;
fig. 9 is a structural sectional view of a switching assembly when the visual field switching mechanism according to the embodiment of the present invention is in a large visual field state;
fig. 10 is a schematic structural view of a cam base of the visual field switching mechanism according to the embodiment of the present invention.
Reference numerals:
the field of view switching mechanism 1000 is,
the support (100) is provided with a support,
a field lens assembly 10, a large field lens assembly 110, a large field lens frame 1101, a first large field lens 1102, a second large field lens 1103, a medium field lens assembly 120, a medium field lens frame 1201, a first medium field lens 1202, a second medium field lens 1203,
the switching elements 200 are arranged in a manner such that,
a driving assembly 20, a driving motor 210, a gear set 220, a motor bracket 211, a first straight gear 221, a first bearing 2211, a first lock nut 2212, a gear box 2201, a first bevel gear 223, a second bevel gear 224, a first bearing cover 2231, a second bearing 2232, a first bearing spacer 2233, a third bearing 2234, a second straight gear 222, a flat key 2221, a second lock nut 2222,
the gear assembly 30, the first transmission shaft assembly 310, the first rotation shaft 311, the third lock nut 3111, the toggle assembly 312, the second transmission shaft assembly 320, the second rotation shaft 321, the fourth bearing 3211, the fourth lock nut 3212, the second bearing cover 3213, the fifth bearing 3112, the second bearing spacer 3113, the sixth bearing 3114, the fifth lock nut 3115, the seventh bearing 3116, the third bearing cover 3117, the third transmission shaft assembly 330, the third rotation shaft 331, the eighth bearing 3311, the third bearing spacer 3312, the ninth bearing 3313, the sixth lock nut 3114, the first guide bearing 3131, the first toggle pin 3151, the first spring 3141, the second guide bearing 3132, the second toggle pin 3152, the second spring 3142, the cam base 340, the matching step 341, the first step surface 3411, and the second step surface 3412.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.
In the related art, the fixed-focus infrared imaging system is difficult to meet the requirement of the application field for the zooming function, and the continuous zooming infrared imaging system has great difficulty in design.
Therefore, the field switching mechanism 100 of the infrared optical system and the infrared optical system disclosed by the invention are a simple, convenient and practical way for realizing the above requirements, wherein a large field or low magnification mode can be used for observing a large scene area and searching a suspected target, and a small field or high magnification mode can be used for carefully observing or magnifying the target to identify, track and aim the target. When the focal length zoom ratio between the large visual field and the small visual field is larger, a transitional visual field is added between the two visual fields, so that a good complementary effect can be achieved on the large visual field and the small visual field.
As shown in fig. 1 to 3, a field switching mechanism 1000 according to an embodiment of the present invention includes: a support 100 and a switching assembly 200.
Specifically, the stand 100 is provided with a plurality of sets of field lens assemblies 10; it should be noted that the "multi-group view mirror assembly 10" is understood herein to include at least the large view mirror assembly 110 and the medium view mirror assembly 120. By adjusting the position of the multiple field of view mirror assemblies 10, the operating states of large, medium and small fields of view, respectively, may be provided.
And the switching assembly 200 is arranged on the bracket 100, is connected with the multiple groups of view field mirror assemblies 10, and is used for adjusting the cut-in or cut-out optical path of each group of view field mirror assemblies 10 so as to realize the view field switching of the infrared optical system.
As shown in fig. 1-3, the switching assembly 200 is disposed on the support 100 and is connected to the field lens assemblies 10 providing a large field of view and a medium field of view, respectively, for adjusting the switching in or out of the optical path of each group of field lens assemblies 10.
According to the field switching mechanism 1000 of the embodiment of the invention, by switching between the field mirror assemblies 10 providing a large field and a medium field, the field switching of the infrared optical system can be realized, and different requirements of specific functions of the infrared optical system on the field can be met. For example, when the target needs to be observed or magnified carefully, the target needs to be identified, tracked and aimed with a small field of view (or high magnification mode); a large field of view (or low magnification mode) is required to be provided when a large scene area needs to be observed and suspected objects need to be searched; the middle view field provides transition between the large view field and the small view field, and the transition has a complementary function of the focusing section.
According to some embodiments of the present invention, the multi-group field lens assembly 10 comprises: a first view mirror assembly and a second view mirror assembly, as shown in fig. 4, the first view mirror assembly may be the large view mirror assembly 110 shown in fig. 4, the second view mirror assembly may be the medium view mirror assembly 120 shown in fig. 4, when the switching assembly 200 adjusts the large view mirror assembly 110 to cut into the optical path, the infrared optical system is in the large view working state; when the switching component 200 adjusts the middle field lens component 120 to cut into the light path, the infrared optical system is in a middle field working state; when the switching component 200 adjusts the optical paths cut out by both the large field-of-view mirror component 110 and the medium field-of-view mirror component 120, the infrared optical system is in the small field-of-view working state.
Fig. 1 to 3 show the state of the visual field switching mechanism 1000 according to the embodiment of the present invention in the small visual field, the middle visual field, and the large visual field, respectively; fig. 7-9 illustrate the switching assembly 200 in its small, medium and large fields of view, respectively, of the field switching mechanism 1000.
Thus, by providing the large field of view mirror assembly 110 and the medium field of view mirror assembly 120 separately, the large field of view, the medium field of view, and the small field of view can be accurately switched by adjusting the position of each of the field of view mirror assemblies 10 in the optical path.
In some embodiments of the present invention, as shown in FIGS. 1-4, switching assembly 200 includes: a drive assembly 20 and a transmission assembly 30. The driving assembly 20 is arranged on the bracket 100 and used for providing power for adjusting the multiple groups of view mirror assemblies 10; the transmission assembly 30 is connected between the driving assembly 20 and the plurality of groups of view mirror assemblies 10, and when the driving assembly 20 operates, the transmission assembly 30 drives and adjusts the plurality of groups of view mirror assemblies 10 to cut in or cut out the optical paths.
According to some embodiments of the present invention, as shown in FIGS. 4-5, drive assembly 20 includes: a driving motor 210 and a gear set 220 connected to the driving motor 210. The driving motor 210 may be a dc micro motor, a servo motor, or the like.
In some embodiments of the present invention, as shown in FIG. 5, gear set 220 includes: a first spur gear 221, a second spur gear 222, a first bevel gear 223, and a second bevel gear 224. Wherein, the first straight gear 221 is fixedly connected with a motor shaft of the driving motor 210; the second spur gear 222 is in meshing fit with the first spur gear 221; the first bevel gear 223 is fixedly connected with the second straight gear 222 through a flat key; one end of the second bevel gear 224 is engaged with the first bevel gear 223, and the other end is fixedly connected with the transmission assembly 30.
The invention adopts a single direct current micromotor component as an executing element, adopts straight gear-bevel gear two-stage transmission between the input of the driving motor 210 and the transmission component 30, and carries out vertical adjustment of a shafting through the bevel gear, thereby simplifying the requirement of circuit control. It should be noted that, in the present invention, the driving component 20 and the transmission component 30 in the switching component 200 are preferably disposed at positions that do not affect the optical path, so as to achieve a compact layout of the structure by fully utilizing the gap of the optical path deflection while ensuring the maximum transmission efficiency, and effectively avoid the interference that may be generated to the optical path during the field switching process.
According to some embodiments of the present invention, as shown in FIG. 6, the transmission assembly 30 includes: a first driveshaft assembly 310, a second driveshaft assembly 320, and a third driveshaft assembly 330. The first transmission shaft assembly 310 is connected with the driving assembly 20 to be driven by the driving assembly 20 to rotate; second drive shaft assembly 320 is rotatably nested within first drive shaft assembly 310, second drive shaft assembly 320 being coupled to large field of view mirror assembly 110; third drive shaft assembly 330 is rotatably nested within second drive assembly 320, and third drive shaft assembly 330 is coupled to mesoscopic lens assembly 120. Moreover, the first transmission shaft assembly 310 is provided with a toggle assembly 312, when the toggle assembly 312 is matched with the second transmission shaft assembly 320, the first transmission shaft assembly 310 and the second transmission shaft assembly 320 synchronously rotate to drive the large field of view mirror assembly 110 to rotate; when the toggle assembly 312 is engaged with the third driving shaft assembly 330, the first driving shaft assembly 310 and the third driving shaft assembly 330 rotate synchronously to drive the middle view lens assembly 120 to rotate.
Therefore, the shafting is matched with the toggle assembly 312, so that the transmission chain is simple and clear, and the requirement of circuit control is simplified.
In some embodiments of the present invention, as shown in fig. 6 and 10, the toggle assemblies 312 are provided in two groups, and each group of the toggle assemblies 312 includes: a resilient member (e.g., first spring 3141, second spring 3142 as shown in fig. 8 and 9) and a finger (e.g., first finger 3151, second finger 3152 as shown in fig. 8 and 9). Wherein, the elastic member is arranged on the first transmission shaft assembly 310; the pin is telescopically engaged with the first drive shaft assembly 310 by an elastic member. The transmission assembly 30 is further provided with a cam base 340, and when the first transmission shaft assembly 310 rotates, the shift pin is switched between the initial state and the extended state by the cam base 340.
According to some embodiments of the present invention, as shown in fig. 10, the cam base 340 has a mating step 341 that mates with the deadbolt, and the mating step 341 has a first step face 3411 and a second step face 3412 that have different heights. The switching action of the view field is realized through the cam mechanism with reasonable design, the transmission chain is simple and clear, and the requirement of circuit control is simplified.
In some embodiments of the present invention, the first driveshaft assembly 310 includes: in the first rotating shaft 311, two guide bearings (e.g., a first guide bearing 3131 and a second guide bearing 3132 shown in fig. 8 and fig. 9) are disposed at intervals along a circumferential direction of an outer circumferential wall of the first rotating shaft 311, and the two sets of toggle assemblies 312 are disposed on the corresponding guide bearings, respectively.
The invention further provides an infrared optical system, which comprises the view field switching mechanism 1000 in any embodiment, and the infrared optical system adjusts the switching-in or switching-out optical paths of the multiple groups of view field mirror assemblies 10 through the switching assembly 200, so that the switching of different view field working modes is realized.
According to the infrared optical mechanism provided by the embodiment of the invention, the field of view of the infrared optical system can be switched by switching among the groups of field-of-view mirror assemblies 10. In addition, a single direct-current micro motor is used as an execution element and is matched with a cam driving mechanism with reasonable design to realize the switching action of the view field, a transmission chain is simple and clear, the requirement of circuit control is simplified, and the design difficulty is reduced; the straight gear-bevel gear two-stage transmission is adopted between the input of the driving motor 210 and the transmission assembly 30, the vertical adjustment of a shafting is carried out through the bevel gear, the compact layout of the structure is realized by fully utilizing the clearance of the light path deflection while the maximum transmission efficiency is ensured, and the interference possibly generated to the light path in the view field switching process is avoided.
The field switching mechanism 1000 of the present invention will be described in detail in one specific embodiment with reference to the accompanying drawings. It is to be understood that the following description is only exemplary in nature and should not be taken as limiting the present invention.
As shown in fig. 1 to 3, the field switching mechanism 1000 includes: the switching assembly 200 is fixed on the bracket 100 through screws. The driving motor 210 is adopted to drive to realize the mutual switching of the large, the medium and the small fields of view.
As shown in fig. 4, the switching assembly 200 includes: a drive assembly 20, a large field lens assembly 110, a medium field lens assembly 120, and a transmission assembly 30. The driving component 20 drives the transmission component 30 to rotate, and drives the large view field mirror component 110 and the medium view field mirror component 120 fixed on the transmission component to respectively cut into the light paths, so that the view fields are switched.
As shown in fig. 5, the driving assembly 20 includes: the driving motor 210, the motor bracket 211, the first spur gear 221, the first bearing 2211, the first locking nut 2212, the gear box 2201, the first bevel gear 223, the second bevel gear 224, the first bearing cover 2231, the second bearing 2232, the first bearing spacer 2233, the third bearing 2234, the second spur gear 222, the flat key 2221, and the second locking nut 2222.
The structure is as follows: the driving motor 210 is fixed on the motor bracket 211 by screws, and the motor bracket 211 is fixed with the gear box 2201 by screws. One end of the first straight gear 221 is fastened to the output shaft of the driving motor 210 by a pin, and the other end is mounted on the gear box 2201 by a first bearing 2211, and is locked and loosened by a first locking nut 2212. The first and second spur gears 221 and 222 are engaged with each other and are connected to the first bevel gear 223 through a flat key 2221. The first bevel gear 223 has one end engaged with the second bevel gear 224 and the other end locked and loosened by the second locking nut 2222, and is mounted on the gear housing 2201 by the second bearing 2232 and the third bearing 2234, and the outer side thereof is fixed by the first bearing cover 2231. The second bearing 2232 and the third bearing 2234 are maintained at their relative distances with a first bearing spacer 2233. The driving motor 210 rotates the first spur gear 221, the second spur gear 222, the first bevel gear 223, and the second bevel gear 224 in sequence.
As shown in fig. 6 and 9, the transmission assembly 30 includes: a first rotating shaft 311, a third lock nut 3111, a second rotating shaft 321, a fourth bearing 3211, a fourth lock nut 3212, a second bearing cover 3213, a cam base 340, a fifth bearing 3112, a second bearing spacer 3113, a sixth bearing 3114, a fifth lock nut 3115, a seventh bearing 3116, a third bearing cover 3117, a third rotating shaft 331, an eighth bearing 3311, a third bearing spacer 3312, a ninth bearing 3313, a sixth lock nut 3115, a first guide bearing 3131, a first dial pin 3151, a first spring 3141, a second guide bearing 3132, a second dial pin 3152, and a second spring 3142.
The structure is as follows: fifth bearing 3112 and sixth bearing 3114 are mounted on first shaft 311 by fourth lock nut 3212, and fifth bearing 3112 and sixth bearing 3114 are held at their relative distances by second bearing spacer 3113 while being fixed to cam base 340 by second bearing cover 3213. The second rotating shaft 321 is installed in the first rotating shaft 311 by means of a third lock nut 3111 cooperating with the fourth bearing 3211 and a fifth lock nut 3115 cooperating with the seventh bearing 3116, respectively; the third shaft 331 is mounted in the first shaft 311 by a sixth lock nut 3115 fitted to a ninth bearing 3313 and a third bearing spacer 3312 fitted to an eighth bearing 3311. The seventh bearing 3116 is fixed to the first shaft 311 using the third bearing cover 3117. Two guide bearings with a certain included angle are installed on the circumference of the first rotating shaft 311, which are respectively a first guide bearing 3131 and a second guide bearing 3132, and two pulling pins, which are respectively a first pulling pin 3151 and a second pulling pin 3152, are arranged inside the first rotating shaft. The two pins slide along the respective cooperating guide bearings under the action of the first and second springs 3141 and 3142, respectively.
It should be noted that the present invention preferably arranges the driving component 20 and the transmission component 30 in the switching component 200 at a position that does not affect the optical path, for example, as shown in fig. 4, the driving component 20 and the transmission component 30 are located below the optical path, and the driving component 20 is parallel to the optical path (i.e. the axial direction of the driving motor 210 in the driving component 20 is parallel to the optical path). Therefore, the compact layout of the structure can be realized by fully utilizing the clearance of the optical path deflection while ensuring the maximum transmission efficiency, and the interference of the driving assembly 20 and the transmission assembly 30 on the optical path is avoided.
As shown in fig. 7-9, the large field-of-view mirror assembly 110 includes: a large field of view frame 1101, a first large field of view lens 1102, and a second large field of view lens 1103. The first large field lens 1102 and the second large field lens 1103 are fixed to the large field lens frame 1101 by screws, respectively. The large field of view frame 1101 is further fixed to the second rotating shaft 321 by screws. The mesoscopic lens assembly 120 includes: a middle view lens frame 1201, a first middle view lens 1202 and a second middle view lens 1203. The first middle view lens 1202 and the second middle view lens 1203 are fixed on the middle view lens frame 1201 through screws respectively. The middle view frame 1201 is fixed on the third rotating shaft 331 through screws.
The first rotating shaft 311 is fixed on the second bevel gear 224 by a screw, and the driving motor 210 drives the second bevel gear 224 to rotate through two-stage transmission of a meshed spur gear and a bevel gear, so as to drive the first rotating shaft 311 to rotate, thereby rotating the first pulling pin 3151 and the second pulling pin 3152 along the inner surface of the cam base 340.
As shown in fig. 7 to 9, the specific process of switching the working states of different viewing fields includes: when the optical system is in a small view field state, the first shifting pin 3151 and the second shifting pin 3152 are both on the second step surface 3412 of the cam base 340, the first rotating shaft 311 rotates to make the first shifting pin 3151 gradually climb along the lift angle of the cam base 340 to enter the first step surface 3411 and rotate along the first step surface 3411, at this time, the first shifting pin 3151 is gradually inserted into the middle view field spectacle frame guide groove and drives the middle view field lens assembly 120 to rotate until the first middle view field lens 1202 enters the optical path, and meanwhile, the second shifting pin 3152 still rotates along the second step surface 3412, the position of the large view field lens assembly 110 is unchanged, and the middle view field 341state is achieved. When the rotation continues, the first shifting pin 3151 drives the middle view mirror assembly 120 to leave the optical path and gradually disengage from the middle view mirror frame guide groove along the return angle of the cam base 340, and the second shifting pin 3152 slides upwards to enter the large view mirror frame guide groove to drive the large view mirror assembly 110 to gradually enter the optical path to reach the large view state.
In summary, the field switching mechanism 1000 for an infrared optical system according to the present invention has at least the following advantages through an elaborate structure design:
a single direct-current micro motor is used as an execution element and is matched with a cam driving mechanism with reasonable design to realize the switching action of the view field, a transmission chain is simple and clear, the requirement of circuit control is simplified, and the design difficulty is reduced;
the straight gear-bevel gear two-stage transmission is adopted between the motor input and the transmission assembly, the vertical adjustment of a shaft system is carried out through the bevel gear, the compact layout of the structure is realized by fully utilizing the clearance of the light path deflection while the maximum transmission efficiency is ensured, and the interference possibly generated to the light path in the view field switching process is avoided.
While the invention has been described in connection with specific embodiments thereof, it is to be understood that it is intended by the appended drawings and description that the invention may be embodied in other specific forms without departing from the spirit or scope of the invention.
Claims (10)
1. A field switching mechanism of an infrared optical system, comprising:
the bracket is provided with a plurality of groups of view field lens assemblies;
and the switching component is arranged on the bracket, is connected with the plurality of groups of view field mirror components, and is used for adjusting the cut-in or cut-out optical path of each group of view field mirror components so as to realize the view field switching of the infrared optical system.
2. The infrared optical system field switching mechanism of claim 1, wherein the plurality of sets of field lens assemblies comprise: a first field of view mirror assembly and a second field of view mirror assembly,
when the switching component adjusts the first view field mirror component to cut into the light path, the infrared optical system is in a large view field working state;
when the switching component adjusts the second visual field mirror component to cut into the optical path, the infrared optical system is in a middle visual field working state;
when the switching component adjusts the first view field mirror component and the second view field mirror component to cut out light paths, the infrared optical system is in a small view field working state.
3. The field switching mechanism of infrared optical system of claim 2, wherein said switching assembly comprises:
the driving assembly is arranged on the bracket and used for providing power for adjusting the plurality of groups of view field lens assemblies;
the transmission assembly is connected between the driving assembly and the multiple groups of view field mirror assemblies, and when the driving assembly runs, the transmission assembly drives and adjusts the multiple groups of view field mirror assemblies to cut in or cut out light paths.
4. The field switching mechanism of infrared optical system of claim 3, wherein said drive assembly comprises: the gear train that driving motor and with driving motor are connected.
5. The field of view switching mechanism for infrared optical systems of claim 4, wherein said gear set comprises:
the first straight gear is fixedly connected with a motor shaft of the driving motor;
the second straight gear is meshed and matched with the first straight gear;
the first bevel gear is fixedly connected with the second straight gear through a flat key;
and one end of the second bevel gear is in meshing fit with the first bevel gear, and the other end of the second bevel gear is fixedly connected with the transmission assembly.
6. The field switching mechanism of infrared optical system of claim 3, wherein said transmission assembly comprises:
the first transmission shaft assembly is connected with the driving assembly so as to be driven by the driving assembly to rotate;
a second drive shaft assembly rotatably journaled within said first drive shaft assembly, said second drive shaft assembly being coupled to said first field of view mirror assembly;
a third drive shaft assembly rotatably nested within the second drive shaft assembly, the third drive assembly being coupled to the second field mirror assembly;
when the shifting assembly is matched with the second transmission shaft assembly, the first transmission shaft assembly and the second transmission shaft assembly synchronously rotate to drive the first view mirror assembly to rotate;
when the toggle assembly is matched with the third transmission shaft assembly, the first transmission shaft assembly and the third transmission shaft assembly synchronously rotate to drive the second visual field mirror assembly to rotate.
7. The infrared optical system's field of view switching mechanism of claim 6, wherein there are two groups of said toggle assemblies, each group of said toggle assemblies comprising:
the elastic piece is arranged on the first transmission shaft assembly;
the shifting pin is in telescopic fit with the first transmission shaft assembly through the elastic piece;
the transmission assembly further includes: the cam base is used for switching the poking pin between an initial state and an extending state under the action of the cam base when the first transmission shaft assembly rotates.
8. The field switching mechanism of infrared optical system of claim 7, wherein said cam base has a mating step that mates with said thumb pin, said mating step having a first step face and a second step face of different heights.
9. The field of view switching mechanism for an infrared optical system as set forth in claim 7, wherein said first drive shaft assembly comprises:
the first pivot, the periphery wall of first pivot is equipped with two guiding bearing along the circumference direction interval, and is two sets of stir the subassembly and locate respectively and correspond guiding bearing.
10. An infrared optical system, comprising: the field-of-view switching mechanism of any one of claims 1 to 9, wherein the infrared optical system switches between different field-of-view operating modes by adjusting multiple groups of field-of-view mirror assemblies to switch in or switch out optical paths through the switching assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110388829.3A CN113126235A (en) | 2021-04-12 | 2021-04-12 | Visual field switching mechanism of infrared optical system and infrared optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110388829.3A CN113126235A (en) | 2021-04-12 | 2021-04-12 | Visual field switching mechanism of infrared optical system and infrared optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113126235A true CN113126235A (en) | 2021-07-16 |
Family
ID=76776027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110388829.3A Pending CN113126235A (en) | 2021-04-12 | 2021-04-12 | Visual field switching mechanism of infrared optical system and infrared optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113126235A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117111257A (en) * | 2023-10-20 | 2023-11-24 | 南通蓬盛机械有限公司 | Infrared optical system with field-of-view switching mechanism |
-
2021
- 2021-04-12 CN CN202110388829.3A patent/CN113126235A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117111257A (en) * | 2023-10-20 | 2023-11-24 | 南通蓬盛机械有限公司 | Infrared optical system with field-of-view switching mechanism |
| CN117111257B (en) * | 2023-10-20 | 2023-12-26 | 南通蓬盛机械有限公司 | Infrared optical system with field-of-view switching mechanism |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0682613U (en) | Lens barrel | |
| US5907433A (en) | Compact variable field of view optical system | |
| CN113126235A (en) | Visual field switching mechanism of infrared optical system and infrared optical system | |
| CN107728284A (en) | A kind of zoom mechanism for the switching of the visual field of infrared optical imaging system two | |
| CN103592751A (en) | Surgical microscope objective having adjustable focal length | |
| CN106154522A (en) | LONG WAVE INFRARED big target surface double-view field varifocal lens and Zooming method thereof | |
| CN215219291U (en) | Visual field switching mechanism of infrared optical system and infrared optical system | |
| CN114200665B (en) | Dual-aperture infrared dual-view-field switching device | |
| US8014089B2 (en) | Lens driving unit and lens driving device | |
| CN112099183A (en) | Ultra-light continuous zoom lens based on PEEK | |
| CN104076478A (en) | Space target detection lens focusing system | |
| US5146254A (en) | Apparatus for driving varifocal lens | |
| CN204065532U (en) | Space Object Detection lens focusing system | |
| CN209879117U (en) | Compact type external double-motor automatic zoom lens structure | |
| CN113031241A (en) | Objective optical system | |
| CN108873276B (en) | High-definition fog-penetrating broadband visible light camera lens and imaging method | |
| CN116047733B (en) | Zoom lens structure and working method | |
| CN114236794B (en) | Double-view-field electric focusing infrared lens and imaging device | |
| CN215300726U (en) | Lens module, camera device and electronic equipment | |
| CN217213286U (en) | Double-focal-length infrared zoom lens | |
| CN116165782B (en) | 30 times Gao Qingchang focus continuous zoom lens with fog penetrating function | |
| CN116300014B (en) | Two-gear switching type zoom lens structure | |
| CN217932235U (en) | Telescopic focal length adjusting type camera module | |
| CN220603786U (en) | Lens module and intelligent glasses | |
| CN115598808B (en) | Long-focus zoom lens with power-driven cover opening mechanism and imaging method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |