CN116953882A - Optical machine device based on secondary mirror switching zooming and secondary mirror switching method - Google Patents

Abstract

The invention relates to an optical machine device based on secondary mirror switching zooming and a secondary mirror switching method, comprising the following steps: the fixed support, the switching support, the view field lens group, the first driving component, the focusing component and the second driving component are arranged on the fixed support in a sliding and rotating mode; the switching support is rotatably arranged on the fixed support, and the three view field lens groups are arranged on the switching support; the first driving component is used for driving the switching bracket to rotate; the focusing component comprises a first transmission shaft which is vertically erected on the fixed bracket, and one end part of the first transmission shaft is eccentrically provided with a first eccentric shaft; and a second driving component for driving the focusing lens group to approach or depart from the corresponding field lens group. The device eliminates the focal length error after the switching of the view field lens group and ensures the definition during viewing.

Description

Optical machine device based on secondary mirror switching zooming and secondary mirror switching method

Technical Field

The invention relates to the field of precise optical machine structures, in particular to an optical machine device based on secondary mirror switching zooming and a secondary mirror switching method.

Background

In order to realize the field change in the viewing process, two field change methods are commonly used in the current viewing tool, one is a continuous zooming optical system, continuous field change is realized through continuous position change of a zoom lens, and the other is a multi-field switching zoom optical system.

In the multi-view-field switching zoom optical system, quick reciprocating switching between channels with different focal lengths is required, and the actual viewing effect is affected because focal length errors are generated due to the change of the lens groups with different view fields in the switching process.

Therefore, it is desirable to provide an optical-mechanical device and a secondary mirror switching method based on the secondary mirror switching zoom to solve the above-mentioned problems.

Disclosure of Invention

The invention provides an optical machine device based on secondary mirror switching zooming, which is characterized in that a focusing component is arranged to drive a focusing lens group to be close to or far from a corresponding view field lens group, so that the problem that an actual viewing effect is affected because a focus error is generated when different view field lens groups are switched in the prior art is solved.

The invention discloses an optical machine device based on secondary mirror switching zooming, which adopts the following technical scheme: comprising the following steps:

the fixed bracket is provided with a fixed seat, and a focusing lens group is arranged on the fixed seat in a sliding and rotating manner;

the switching bracket is rotatably arranged on the fixed bracket;

the three view field lens groups with different view fields are arranged on the switching bracket around the rotation center of the switching bracket;

the first driving component is arranged on the fixed support, and the output end of the first driving component drives the switching support to rotate through the transmission component, so that each view field lens group is sequentially switched to be concentric with the focusing lens group;

the focusing component comprises a first transmission shaft which is vertically erected on the fixed bracket, one end part of the first transmission shaft is eccentrically provided with a first eccentric shaft, and the first eccentric shaft is rotationally connected to the focusing lens group;

and the second driving assembly is used for driving the first transmission shaft to rotate, so that the first eccentric shaft drives the focusing lens group to be close to or far away from the corresponding field lens group.

Preferably, the fixed support comprises a fixed plate which is horizontally arranged, two support plates are arranged on the fixed plate in parallel, and the support plates are perpendicular to the fixed plate, wherein the switching support is connected between the two support plates through rotation.

Preferably, the corresponding two side surfaces of the switching support are provided with rotating shafts, and the rotating shafts are connected between the two support plates through bearings.

Preferably, the second driving assembly comprises a focusing motor, the focusing motor is arranged at the bottom of the fixing plate, the output end of the focusing motor is connected with a first gear, the first gear is meshed with a second gear, the second gear is sleeved and fixed at the end part of the first transmission shaft, which is away from the first eccentric shaft, wherein the end part of the first transmission shaft, which is away from the first eccentric shaft, sequentially penetrates through a supporting plate, which is close to the focusing lens group, and the fixing plate to extend to the bottom of the fixing plate, and then is sleeved and fixed with the second gear.

Preferably, the device further comprises a focusing code wheel, wherein scales are arranged on the focusing code wheel, and teeth meshed with the second gear are circumferentially arranged on the focusing code wheel.

Preferably, the fixed support is connected with the fixing base through the mounting, the guide hole is formed in the fixing base, the lens group mounting seat is sleeved in the guide hole, the lens group mounting seat is connected with the focusing lens group, the lens group mounting seat can rotate and slide in the guide hole, and the jack spliced with the first eccentric shaft is formed in the circumference of the lens group mounting seat.

Preferably, the first driving assembly comprises a first motor fixed on the fixed bracket, and the first motor is in transmission connection with the rotating shaft of the switching bracket through a transmission assembly.

Preferably, the transmission assembly is a rope transmission mechanism, a driving wheel of the rope transmission mechanism is arranged on an output shaft of the first motor, a driven wheel is arranged on the rotating shaft, and the driving wheel and the driven wheel are in transmission connection through a steel wire rope.

Preferably, the device further comprises a first in-place baffle, a second in-place baffle, a third in-place baffle and an in-place baffle driving mechanism, wherein the third in-place baffle is slidably connected to the support plate close to the focusing lens group, the in-place baffle driving mechanism is used for driving the third in-place baffle to limit one view field lens group, the second in-place baffle is arranged on the support plate far away from the focusing lens group, the first in-place baffle is arranged on the support plate close to the focusing lens group, and the switching support is provided with magnets sequentially adsorbed with the first in-place baffle, the second in-place baffle and the third in-place baffle.

Preferably, the in-place baffle driving mechanism comprises a second motor, the second motor is in transmission connection with a second transmission shaft, the second transmission shaft horizontally penetrates through and is close to the supporting plate of the focusing lens group, and then is connected with a second eccentric shaft, and the end part of the second eccentric shaft is in rotary connection with the third in-place baffle.

A secondary mirror switching method of an optical machine device based on secondary mirror switching zoom, comprising:

controlling the switching bracket to rotate for the first time, so that the first in-place baffle sheet is separated from the magnet on the switching bracket;

until the second view field objective lens coincides with the optical center of the focusing lens group, controlling the third in-place baffle to cut in and attract the magnet on the switching support;

controlling the switching support to rotate for the second time, and simultaneously controlling the third in-place baffle to cut out, so that the third in-place baffle is separated from the magnet on the switching support until the third view field objective lens coincides with the optical center of the focusing lens group, and at the moment, the second in-place baffle is attracted with the corresponding magnet on the switching support;

the process of switching from the secondary lens to the second field objective lens and then from the second field objective lens to the third field objective lens is completed.

The beneficial effects of the invention are as follows:

1. by arranging the focusing component, when the three view field lens groups are switched, and when the last view field lens group is switched to the next view field lens group, the focus error is generated due to the change of the view field lens group.

2. Through setting up the focusing code wheel, when first transmission shaft rotated, the focusing code wheel rotated along with first transmission shaft, at this moment, can realize carrying out accurate focusing to the back focus of field of view lens group switching according to the scale on the focusing code wheel to guarantee the precision of eliminating the focus error.

3. Through setting up first separation blade that targets in place, second separation blade that targets in place, third separation blade that targets in place for inject the visual field lens group after switching in place, wherein, drive the cutting-in and cutting-out of third separation blade that targets in place through the separation blade actuating mechanism, realize spacing or the current to middle lens group, thereby guarantee when realizing three visual field lens group switching, can carry out spacing to the visual field objective after switching at every turn again, thereby guarantee the visual field objective after switching and focusing lens group accurate focus, and stability after focusing.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic general structural diagram a of an optical mechanical device based on secondary mirror switching zoom according to an embodiment of the present invention;

FIG. 2 is a schematic diagram B of an embodiment of an optical-mechanical device based on secondary mirror switching zoom according to the present invention;

FIG. 3 is a schematic diagram of a light machine device with a secondary mirror switching zoom according to an embodiment of the present invention, with a switching bracket removed;

FIG. 4 is a schematic diagram illustrating a switching bracket of an embodiment of an optical mechanical device based on secondary mirror switching zoom according to the present invention;

FIG. 5 is a schematic diagram of a sliding connection structure of a second in-place shutter in an embodiment of an optical mechanical device based on secondary mirror switching zoom according to the present invention;

FIG. 6 is a schematic diagram illustrating a transmission assembly of an embodiment of an optical mechanical device based on secondary mirror switching zoom according to the present invention;

fig. 7 is a schematic structural diagram of a driving wheel of a transmission assembly in an embodiment of an optical mechanical device based on secondary mirror switching and zooming according to the present invention;

in the figure: 1. a secondary mirror; 2. a bearing; 3. switching the support; 4. a second field objective; 5. a third field objective; 6. a fixed bracket; 7. a first in-place flap; 8. an in-place flap drive mechanism; 9. a fixing member; 10. focusing lens group; 11. a transmission assembly; 12. a second motor; 13. a first motor; 14. a focusing member; 15. a second in-place flap; 17. balancing weight; 3-1, a rotating shaft; 3-2, a first installation interface; 3-3, a second installation interface; 3-4, a third installation interface; 3-21, a third magnet; 3-41, a first magnet; 8-1, a third in-place baffle; 8-2 baffle supports; 8-3, a guide rail; 10-1, fixing base; 14-1, a first transmission shaft; 14-2, a first gear; 14-3, a second gear; 14-4, focusing the code disc; 17-1, a second magnet; 111. a driving wheel; 112. a wire rope; 113. and (3) a driven wheel.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

An embodiment of an optical mechanical device based on secondary mirror switching zoom of the present invention, as shown in fig. 1, includes: the device comprises a fixed bracket 6, a switching bracket 3, three field lens groups with different field sizes, a first driving component, a focusing component 14 and a second driving component, wherein the fixed bracket 6 slides and is rotatably provided with a focusing lens group 10; the switching support 3 is rotatably arranged on the fixed support 6, specifically, the switching support 3 is shown in fig. 4, wherein the field lens groups with different sizes according to three fields of view are arranged on the switching support 3 around the rotation center of the switching support 3, and the field lens groups are arranged at different positions of the switching support 3, namely, the gap compensation machine is arranged to adjust the gap compensation machine to add errors, so that the consistency of optical axes of the three field lens groups can be ensured; the first driving component is arranged on the fixed support 6, and the output end of the first driving component drives the switching support 3 to rotate through the transmission component 11, so that each view field lens group in the three view field lens groups is sequentially switched to be concentric with the focusing lens group 10; the focusing component 14 comprises a first transmission shaft 14-1 vertically erected on the fixed support 6, one end part of the first transmission shaft 14-1 is eccentrically provided with a first eccentric shaft, and the second driving component is used for driving the first transmission shaft 14-1 to rotate, so that the first eccentric shaft drives the focusing lens group 10 to be close to or far from the corresponding field lens group, and error compensation is carried out on focal length errors generated during switching of the field lens group.

Specifically, as shown in fig. 3 and 1, the fixing support 6 of this embodiment includes a fixing plate that is horizontally disposed, two support plates are disposed on the fixing plate in parallel, and the support plates are perpendicular to the fixing plate, where the switching support 3 is connected between the two support plates by rotation.

Specifically, as shown in fig. 4, rotating shafts 3-1 are arranged on two corresponding side surfaces of the switching support 3, the rotating shafts 3-1 are connected between two support plates through bearings 2, high-performance AB glue is coated on the outer ring of the bearings 2, gaps of the outer ring of the rear end bearing are eliminated after the bearing is solidified, and proper axial pretightening force is applied to eliminate the axial gaps when the bearing is installed; after bearing clearance elimination, the in-place stability of the switching lens group is guaranteed, the rotating shaft 3-1 and the bearing can enable the switching support 3 to smoothly rotate around the rotating shaft 3-1 of the switching support, the two bearings clamp the switching support 3 to prevent the switching support 3 from shaking, the first mounting interfaces 3-2, the second mounting interfaces 3-3 and the third mounting interfaces 3-4 corresponding to the secondary lens 1, the second field objective 4 and the third field objective 5 are sequentially arranged on the switching support 3, the third mounting interfaces 3-4 and the three mounting interfaces are equidistantly arranged around the axis, wherein the top of the switching support 3 is further provided with a balancing weight 17, as shown in fig. 1, the purpose of arranging the balancing weight 17 is to balance the moment of inertia of the switching support 3 up and down, namely, as shown in fig. 1, two field lens groups are arranged at the lower part, one field lens group is arranged at the upper part, namely, the three field lens groups are sequentially provided with the secondary lens 1, the third field objective 5 and the second field objective 4 as shown in fig. 1, and the fields of view of the three field lens groups are sequentially increased, namely, the balancing weight 17 is required to be arranged at one side of the minimum field objective lens 3.

Specifically, as shown in fig. 3, the second driving assembly includes a focusing motor, the focusing motor is disposed at the bottom of the fixing plate, an output end of the focusing motor is connected with a first gear 14-2, the first gear 14-2 is meshed with a second gear 14-3, the second gear 14-3 is sleeved and fixed at an end portion of the first transmission shaft 14-1, which is away from the first eccentric shaft, wherein the end portion of the first transmission shaft 14-1, which is away from the first eccentric shaft, is sequentially close to a supporting plate and a fixing plate of the focusing lens group 10, extends to the bottom of the fixing plate, and is sleeved and fixed with the second gear 14-3.

Specifically, in order to ensure that the focus error can be more accurately eliminated, the embodiment further includes a focusing code wheel 14-4, a scale is arranged on the focusing code wheel 14-4, teeth meshed with the second gear 14-3 are circumferentially arranged on the focusing code wheel 14-4, and when focusing is performed each time, the second gear 14-3 rotates to drive the focusing code wheel 14-4 to rotate, and then the focus error elimination size can be determined according to the scale rotated by the focusing code wheel 14-4.

Specifically, the fixed support 6 is connected with a fixed seat 10-1 through a fixing piece 9, a guide hole is formed in the fixed seat 10-1, a lens set mounting seat is sleeved in the guide hole, the lens set mounting seat is connected with a focusing lens set 10, the lens set mounting seat can rotate and slide in the guide hole, and a jack for being spliced with the first eccentric shaft is formed in the circumference of the lens set mounting seat.

Specifically, the first driving assembly comprises a first motor 13 fixed on the fixed bracket 6, and the first motor 13 is in transmission connection with the rotating shaft 3-1 of the switching bracket 3 through the transmission assembly 11.

Specifically, as shown in fig. 6, the transmission assembly 11 is a rope transmission mechanism, a driving wheel 111 of the rope transmission mechanism is mounted on an output shaft of the first motor 13, a driven wheel 113 is mounted on the rotating shaft 3-1, the driving wheel 111 and the driven wheel 113 are in transmission connection through a steel wire rope 112, the steel wire rope 112 is used for transmission, the switching support 3 can rotate in a circulating and reciprocating mode, specifically, two annular grooves wound with the steel wire rope 3 are formed in the peripheral surfaces of the driving wheel 1 and the driven wheel 2, as shown in fig. 6 and 7, through holes B are formed in the side surfaces of each wheel, and the through holes B are communicated with the two annular grooves through rope penetrating holes A; one side surface of the driving wheel 1 is provided with a limiting component, and the limiting component is used for limiting the movement of the steel wire rope 112; one end of the steel wire rope 112 penetrates into the through hole B along the rope penetrating hole A of one annular groove of the driven wheel 113 and penetrates out of the rope penetrating hole A of the other annular groove, two rope portions of the steel wire rope 112, which are positioned in the rope penetrating hole A of the driven wheel 113, are sequentially wound into one circle in the annular groove corresponding to the driven wheel 113 and the annular groove corresponding to the driving wheel 111 respectively, namely, after one circle is diffracted in the annular groove of the driven wheel 113, one circle is wound into the annular groove corresponding to the driving wheel 111 respectively, and two free ends of the diffracted steel wire rope 112 penetrate into the through hole B through the rope penetrating hole A in the annular groove of the driving wheel 1 and penetrate out of the through hole B to be limited by the limiting component.

When needed, through the side surfaces of the driving wheel 111 and the driven wheel 113 are provided with through holes, then the annular grooves of the driving wheel 111 and the driven wheel 113 are provided with rope penetrating holes penetrating through the annular grooves and the through holes, the steel wire rope 112 is further penetrated into the through holes from the rope penetrating holes of one annular groove of the driven wheel and penetrated out from the through holes of the other annular groove, two rope sections are respectively wound around the annular grooves of the driven wheel 113 for one circle, then the annular grooves of the driving wheel 111 are wound around one circle, the free ends of the steel wire rope are sequentially led in from the rope penetrating holes of the driving wheel 111 and penetrated out from the through holes, and then the steel wire rope is pre-tightened and then is limited by a limiting component.

Specifically, the device further comprises a first in-place baffle 7, a second in-place baffle 15, an in-place baffle driving mechanism 8 and a third in-place baffle 8-1, wherein the third in-place baffle 8-1 is slidably connected to a support plate close to the focusing lens group 10, the in-place baffle driving mechanism 8 is used for driving the third in-place baffle 8-1 to limit one view field lens group, the second in-place baffle 15 is arranged on the support plate far away from the focusing lens group 10, the first in-place baffle 7 is arranged on the support plate close to the focusing lens group 10, the switching support 3 is provided with magnets sequentially adsorbed by the first in-place baffle 7, the second in-place baffle 15 and the third in-place baffle 8-1, specifically, as shown in fig. 4, a first magnet 3-41 adsorbed by the first in-place baffle 7 is arranged on a frame of the switching support 3 connected with the third view field lens 5, and a third magnet 3-21 adsorbed by the second in-place baffle 15 is arranged on the switching support 3 and is connected with the second in-place lens 1; the second magnet 7-1 adsorbed by the third in-place baffle 8-1 is arranged on one surface of the balancing weight 17 facing the fixed seat 10-1, wherein the in-place baffle driving mechanism 8 comprises a second motor 12, the second motor 12 is in transmission connection with a second transmission shaft, the second transmission shaft horizontally penetrates through and approaches a supporting plate of the focusing lens group 10 and then is connected with a second eccentric shaft, the end part of the second eccentric shaft is in rotary connection with the third in-place baffle 8-1, the magnet provides in-place adsorption, and the in-place baffle driving mechanism is matched to block the in-place view lens group so as to enable the view lens group to be stable in place, and the switched view lens group and the optical axis of the focusing lens group 10 are kept concentric and stable in place.

As shown in fig. 3, the sliding connection manner of the third in-place baffle 8-1 and the support plate is specifically: the device comprises a baffle support 8-2 and a guide rail 8-3, wherein the guide rail 8-3 is arranged on a supporting plate close to a focusing lens group 10, the guide rail 8-3 is connected with the baffle support 8-2 in a sliding manner, a third in-place baffle 8-1 is connected to the baffle support 8-2, and the end parts of the baffle support 8-2 and a second eccentric shaft are rotationally connected, wherein when the second view field objective lens 4 is switched to the third view field objective lens 5, a third in-place baffle 8-1 of an intermediate lens group, namely the third view field objective lens 5 is switched in place, is cut in or out by a baffle driving mechanism 8, so that the limiting and same row of a balancing weight 17 are controlled, so that the second view field objective lens 4 is switched to the third view field objective lens 5 by the second view field objective lens 4, then the secondary lens 1 and the second in-place baffle 15 are used for limiting by the first in-place baffle 7, the second in-place baffle 15, and the intermediate view field shifting mechanism 8 is used for realizing the limiting and the passing of the third in-place baffle 8-1, and the third in-place baffle driving mechanism 8 is used for enabling the third in-place baffle 8-1 to cut in the intermediate lens 5 to pass through the intermediate lens group (the third view field objective lens 5).

In the above embodiments, shims are used to adjust the gaps, deep groove ball bearings are used as bearings, and optical devices such as diaphragms and baffles can be used as lens groups.

A secondary mirror switching method of an optical machine device based on secondary mirror switching zoom, comprising: the first rotation of the switching bracket 3 is controlled, and the first in-place baffle 7 is separated from the magnet on the switching bracket 3; until the second field objective 4 coincides with the optical center of the focusing lens group 10, the third in-place baffle 8-1 is controlled to cut in and is attracted with the magnet on the switching bracket 3; controlling the switching bracket 3 to rotate for the second time, so that the third in-place baffle 8-1 is separated from the magnet on the switching bracket 3 until the optical center of the third field objective lens 5 and the focusing lens group 10 are overlapped, and at the moment, the second in-place baffle 15 is attracted with the corresponding magnet on the switching bracket 3; namely, the process of switching from the secondary mirror 1 to the second field objective 4 and switching from the second field objective to the third field objective 5 is completed, and specifically, when the optical centers of the secondary mirror 1 and the focusing lens group 10 are overlapped, the first in-place sheet 7 is attracted with the first magnet 3-31 to limit; when the optical centers of the second field objective lens 4 and the focusing lens group 10 are overlapped, the third in-place baffle 8-1 is cut in by switching the baffle mechanism 8, and the third in-place baffle 8-1 and the second magnet 17-1 are attracted to limit; when the third field objective lens 5 is overlapped with the optical center of the focusing lens group 10, the third in-place sheet 15 is attracted with the third magnet 3-21 to limit.

In summary, according to the optical machine device based on secondary mirror switching zoom provided by the embodiment of the invention, by arranging the focusing component, when three field lens groups are switched, and when the field lens group is switched from the last field lens group to the next field lens group, the focal length error is generated due to the change of the field lens group, so that the first transmission shaft is driven to rotate through the second driving component, the end part of the first transmission shaft rotates along with the first transmission shaft and drives the focusing lens group to approach or separate from the field lens group, thereby eliminating focal length error after the field lens group is switched, further ensuring definition in viewing, and secondly, when the first transmission shaft rotates, the focusing code disc rotates along with the first transmission shaft, and at the moment, accurate focusing on the switched focal length of the field lens group can be realized according to the scale on the focusing code disc, so that the accuracy of eliminating the focal length error is ensured, and the definition in viewing is further ensured.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (10)

1. An optical-mechanical device based on secondary mirror switching zoom, characterized by comprising:

the fixed bracket is provided with a fixed seat, and a focusing lens group is arranged on the fixed seat in a sliding and rotating manner;

the switching bracket is rotatably arranged on the fixed bracket;

the three view field lens groups with different view fields are arranged on the switching bracket around the rotation center of the switching bracket;

the first driving component is arranged on the fixed support, and the output end of the first driving component drives the switching support to rotate through the transmission component, so that each view field lens group is sequentially switched to be concentric with the focusing lens group;

the focusing component comprises a first transmission shaft which is vertically erected on the fixed bracket, and one end part of the first transmission shaft is eccentrically provided with a first eccentric shaft;

and the second driving assembly is used for driving the first transmission shaft to rotate, so that the first eccentric shaft drives the focusing lens group to be close to or far away from the corresponding field lens group.

2. The optical mechanical device based on secondary mirror switching zoom according to claim 1, wherein the fixing support comprises a fixing plate horizontally arranged, two support plates are arranged on the fixing plate in parallel, and the support plates are perpendicular to the fixing plate, wherein the switching support is connected between the two support plates through rotation.

3. The optical mechanical device based on secondary mirror switching zoom according to claim 2, wherein the switching bracket is provided with rotating shafts on the corresponding two sides, and the rotating shafts are connected between the two support plates through bearings.

4. The optical mechanical device based on secondary mirror switching zooming according to claim 2, wherein the second driving assembly comprises a focusing motor, the focusing motor is arranged at the bottom of the fixing plate, the output end of the focusing motor is connected with a first gear, the first gear is meshed with a second gear, the second gear is sleeved and fixed at the end part of the first transmission shaft, which is away from the first eccentric shaft, and the end part of the first transmission shaft, which is away from the first eccentric shaft, sequentially penetrates through the supporting plate and the fixing plate, which are close to the focusing lens group, and extends to the bottom of the fixing plate, and then is fixed with the second gear in a sleeved mode.

5. The optical-mechanical device based on secondary mirror switching zoom according to claim 4, further comprising a focusing code wheel, wherein scales are arranged on the focusing code wheel, and teeth meshed with the second gear are circumferentially arranged on the focusing code wheel.

6. The optical mechanical device based on secondary mirror switching zooming according to claim 1, wherein the fixing support is connected with a fixing seat through a fixing piece, a guide hole is formed in the fixing seat, a mirror set mounting seat is sleeved in the guide hole and is connected with a focusing mirror set, the mirror set mounting seat can rotate and slide in the guide hole, and a jack spliced with the first eccentric shaft is formed in the periphery of the mirror set mounting seat.

7. The optical-mechanical device based on secondary mirror switching zoom according to claim 1, wherein the first driving assembly comprises a first motor fixed on a fixed bracket, and the first motor is in transmission connection with a rotating shaft of the switching bracket through a transmission assembly; the transmission assembly is a rope transmission mechanism, a driving wheel of the rope transmission mechanism is arranged on an output shaft of the first motor, a driven wheel is arranged on the rotating shaft, and the driving wheel and the driven wheel are in transmission connection through a steel wire rope.

8. The optical-mechanical device based on secondary mirror switching zoom according to claim 1, further comprising a first in-place baffle, a second in-place baffle, a third in-place baffle and an in-place baffle driving mechanism, wherein the third in-place baffle is slidably connected to a support plate close to the focusing lens group, the in-place baffle driving mechanism is used for driving the third in-place baffle to limit one of the view field lens groups, the second in-place baffle is arranged on a support plate far away from the focusing lens group, the first in-place baffle is arranged on a support plate close to the focusing lens group, and the switching support is provided with magnets sequentially adsorbed to the first in-place baffle, the second in-place baffle and the third in-place baffle.

9. The optical mechanical device based on secondary mirror switching zoom according to claim 8, wherein the in-position baffle driving mechanism comprises a second motor, the second motor is in transmission connection with a second transmission shaft, the second transmission shaft horizontally penetrates through and approaches the support plate of the focusing lens group and then is connected with a second eccentric shaft, and the end part of the second eccentric shaft is in rotary connection with the third in-position baffle.

10. A secondary mirror switching method of an optical machine device based on secondary mirror switching zoom, comprising:

controlling the switching bracket to rotate for the first time, so that the first in-place baffle sheet is separated from the magnet on the switching bracket;

until the second view field objective lens coincides with the optical center of the focusing lens group, controlling the third in-place baffle to cut in and attract the magnet on the switching support;

controlling the switching support to rotate for the second time, and simultaneously controlling the third in-place baffle to cut out, so that the third in-place baffle is separated from the magnet on the switching support until the third view field objective lens coincides with the optical center of the focusing lens group, and at the moment, the second in-place baffle is attracted with the corresponding magnet on the switching support;

the process of switching from the secondary lens to the second field objective lens and then from the second field objective lens to the third field objective lens is completed.