CN217238504U - Miniaturized mechanical structure that zooms in succession - Google Patents

Abstract

The utility model belongs to the technical field of the photoelectricity, concretely relates to miniaturized mechanical structure that zooms in succession to solve bulky, the zoom ratio that traditional zoom system exists little, the lower technical problem of resolution ratio. The utility model comprises a box body, a front component optical system and a rear component continuous zooming system; the front component optical system forms an off-axis two-mirror optical system by a primary mirror arranged on a fifth side plate of the box body and a secondary mirror arranged on a second side plate of the box body which are sequentially arranged along a light path, so that a front telescope for amplification is formed, and the focal length of a target system and the aperture of an incident beam can be compressed; the rear component continuous zooming system is positioned on an emergent light path of the secondary mirror, is arranged between the second side plate and the fourth side plate of the box body, comprises a support frame fixed on a bottom plate of the box body, a front fixing group, a zooming compensation group, a rear fixing group and a detector which are fixed on the support frame and sequentially arranged along the light path, and is used for providing a continuous zooming function.

Description

Miniaturized continuous zooming mechanical structure

Technical Field

The utility model belongs to the technical field of the photoelectricity, a mechanical structure zooms in succession is related to, concretely relates to miniaturized mechanical structure zooms in succession.

Background

With the continuous development of science and technology, the photoelectric equipment detection system is required to be small in size, light in weight, large in detection distance and high in definition, can be continuously observed under the weather conditions of fog, rain, snow, dust and the like, and can be used for carrying out large-area small-magnification panoramic search and small-area large-magnification enlarged observation on a target.

The continuous zooming system changes the focal length of the whole system by moving two or more lens groups in the system, and can realize the increase and decrease of the focal length by pushing and pulling or rotating a zooming ring on the premise of keeping the image plane unchanged, thereby realizing that the system can obtain continuous and clear images in the whole zooming process. Under the condition of not needing to replace a lens, the stepless conversion of the focal length can be realized in the focal length change range, and the diversification of the composition is realized. However, the conventional continuous zoom system generally has the problems of large volume, small zoom ratio and low resolution.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main objective lies in solving bulky, the zoom ratio is little, the lower technical problem of resolution ratio that traditional continuous zoom system exists, provides a miniaturized continuous zooming mechanical structure.

In order to achieve the above object, the utility model provides a following technical scheme:

a miniaturized continuous zooming mechanical structure is characterized by comprising a box body, a front component optical system and a rear component continuous zooming system;

the box body comprises a first side plate, a second side plate, a third side plate, a fourth side plate, a fifth side plate, a sixth side plate, a top plate and a bottom plate;

the front component optical system comprises a primary mirror arranged on the fifth side plate and a secondary mirror arranged on the second side plate; the primary mirror and the secondary mirror are sequentially arranged along a light path to form an off-axis two-mirror optical system, and the secondary mirror is positioned behind a primary image surface of the primary mirror and is used for converting a converged light beam into parallel light;

the rear component continuous zooming system is positioned on an emergent light path of the secondary mirror, is arranged between the second side plate and the fourth side plate, and comprises a support frame fixed on a bottom plate of the box body, a front fixing group, a zooming compensation group, a rear fixing group and a detector which are fixed on the support frame and sequentially arranged along the light path;

the front fixing group is arranged at the front end of the support frame and comprises a focusing driving group, a front fixing lens barrel and a focusing lens group arranged in the front fixing lens barrel; the focusing lens group is driven by the focusing driving group to reciprocate along the axial direction of the front fixed lens cone;

the zoom compensation group comprises a zoom driving group, a straight grooved drum fixedly communicated with the rear end of the front fixed lens drum, a zoom lens group and a compensation lens group which are sequentially arranged in the straight grooved drum; the zooming lens group and the compensating lens group are driven by the zooming driving group to reciprocate along the axial direction of the straight grooved drum, and the moving directions of the zooming lens group and the compensating lens group are opposite;

the rear fixing group comprises a rear fixing lens barrel fixedly communicated with the rear end of the straight groove barrel and a rear fixing lens group fixedly arranged on the inner side wall of the rear fixing lens barrel;

the detector is fixed at the rear end of the support frame and is arranged close to the rear fixing group.

Furthermore, the front group optical system also comprises a main lens seat fixed on the fifth side plate and a main lens trimming pad arranged between the main lens seat and the fifth side plate, and the main lens is arranged on the fifth side plate through the main lens seat and the main lens trimming pad.

Furthermore, the front component optical system further comprises a secondary lens seat fixed on the second side plate, a transverse adjusting gasket and a vertical adjusting gasket, wherein the transverse adjusting gasket and the vertical adjusting gasket are installed between the secondary lens seat and the second side plate, and the secondary lens is installed on the second side plate through the transverse adjusting gasket and the vertical adjusting gasket of the secondary lens seat.

Further, the focusing driving group comprises a focusing moving cylinder coaxially sleeved on the inner side of the front fixed lens barrel, a focusing cam cylinder coaxially sleeved on the outer side of the front fixed lens barrel, a first motor fixedly installed on the support frame and a first driving nail;

the focusing lens group is fixedly arranged on the inner side wall of the focusing moving cylinder;

a first large gear ring is arranged on the focusing cam barrel along the circumferential direction of the outer surface, and a first gear arranged at the output end of the first motor is meshed with the first large gear ring;

a first inclined groove is formed in the side wall of the focusing cam barrel;

a first straight groove is correspondingly formed in the side wall of the front fixed lens barrel;

and the first driving nail sequentially penetrates through the corresponding first inclined groove and the corresponding first straight groove and then is fixedly connected with the focusing moving cylinder.

Furthermore, the zooming driving group comprises a zooming sliding frame, a compensation sliding frame, a zooming compensation cam cylinder, a second motor, a second driving nail and a third driving nail, wherein the zooming sliding frame and the compensation sliding frame are sequentially coaxially sleeved on the inner side of the straight groove cylinder;

the zoom lens group is fixedly arranged on the inner side wall of the zoom carriage;

the compensation lens group is fixedly arranged on the inner side wall of the compensation sliding frame;

a second large gear ring is arranged on the variable-magnification compensation cam barrel along the circumferential direction of the outer surface, and a second gear arranged at the output end of the second motor is meshed with the second large gear ring;

the side wall of the zoom compensation cam barrel is provided with a second chute and a third chute which are opposite in direction corresponding to the zoom lens group and the compensation lens group respectively, and the second chute and the third chute are in a normal distribution state;

a second straight groove and a third straight groove are correspondingly formed in the side wall of the straight groove barrel;

the second driving nail sequentially penetrates through the corresponding second inclined groove and the corresponding second straight groove and then is fixedly connected with the zoom lens group;

and the third driving nail sequentially penetrates through the corresponding third inclined groove and the corresponding third straight groove and then is fixedly connected with the compensation lens group.

Furthermore, each lens of the focusing lens group, the zoom lens group, the compensation lens group and the rear fixing lens group is provided with an independent centering frame.

Furthermore, trimming space rings are arranged at the front and the rear of each lens of the focusing lens group, the zoom lens group, the compensation lens group and the rear fixing lens group.

Furthermore, the focusing driving group also comprises a first limit switch arranged on the supporting frame and a first baffle piece which is arranged on the focusing cam barrel and matched with the first limit switch.

Furthermore, the zooming driving group also comprises a second limit switch arranged on the supporting frame and a second baffle piece arranged on the zooming compensation cam barrel and matched with the second limit switch.

Furthermore, the outer surface of the detector is subjected to radiation protection coating treatment, and the inner surface of the detector is subjected to conductive treatment.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model provides a pair of miniaturized continuous zooming mechanical structure, front component optical system constitute off-axis two-mirror optical system through the primary mirror of installing at the fifth side plate and the secondary mirror of second side plate, and it has no colour difference, compact structure, wide spectrum suitability's advantage, can become the parallel light with the light beam that assembles, forms a leading telescope of enlarging usefulness, compresses target system focus and incident beam bore; the rear component continuous zooming system is arranged behind the secondary mirror to provide a continuous zooming function; the combination of two optical system of off-axis and the continuous zoom system of back component that front component optical system primary mirror and secondary mirror are constituteed can make the utility model discloses the function of the continuous zoom of big zoom ratio, big visual field, long focus is realized taking up less space volume to obtain high-quality observation image. The utility model has the characteristics of compact structure, price/performance ratio are high, have good market perspective.

2. The utility model provides a pair of miniaturized mechanical structure that zooms in succession is carrying out target monitoring time measuring, the utility model discloses an equipment just can replace two or many equipment functions under the different task requirements of traditional monitoring tracker, has reduced the space size and the load weight of satellite to reduce the development cost of satellite, also improved satellite detection's reliability.

3. The utility model provides a pair of miniaturized mechanical structure that zooms in succession, owing to the front component optical system primary mirror and the secondary mirror disalignment of adoption, so avoided the coaxial problem that blocks of card effectively, can realize not having and block, the detection ability of reinforcing system.

4. The utility model provides a pair of miniaturized mechanical structure that zooms in succession, in the bearing structure design process of front component optical system primary mirror, consider ambient temperature and assembly stress to the influence of speculum shape of face, the two anti-optical system's of off-axis primary mirror passes through primary mirror seat and primary mirror to be pruned and fills up and fix on the box, has guaranteed the face type precision of primary mirror.

5. The utility model provides a pair of miniaturized mechanical structure that zooms in succession, two anti-optical system's of off-axis secondary mirror pass through secondary mirror seat, horizontal adjusting shim and vertical adjusting shim and fix on the box, have not only guaranteed the face type precision of secondary mirror, can also adjust axial distance and relative angle between primary mirror and the secondary mirror through adjusting horizontal adjusting shim and vertical adjusting shim to guarantee that primary mirror and secondary mirror have accurate spatial position.

6. The utility model provides a pair of miniaturized mechanical structure that zooms in succession, every lens that rear component continuous zooming system's focusing mirror group, zoom lens group, compensating mirror group and back fixed mirror group all are provided with solitary to the frame, adopt the structural style of centering assembly, have guaranteed the reliability of group's group under high low temperature and vibration environment and whole zooming system's imaging precision.

7. The utility model provides a pair of miniaturized mechanical structure that zooms in succession through the cooperation relation between first drive nail, first chute and the first straight flute, turns into the reciprocating motion of focusing mirror group with the rotary motion of focusing cam section of thick bamboo through first drive nail, has not only realized the high accuracy focusing to make the structure of system that zooms compacter, stability is stronger.

8. The utility model provides a pair of miniaturized mechanical structure that zooms in succession, through the second drive nail, the groove is write to the second, the cooperation relation between second straight flute and the zoom lens group, and the third drive nail, the third chute, the cooperation relation between third straight flute and the compensation lens group, the rotary motion that becomes the zoom compensation cam section of thick bamboo converts to and makes the zoom lens group, the translational motion that motion direction is opposite is organized to the compensation lens, the in-process television system that zooms in succession looks axle uniformity precision has not only been improved, and is structural simpler, the effectual stability that has improved the system.

9. The utility model provides a pair of miniaturized mechanical structure that zooms in succession all is provided with around every lens of group, zoom lens group, compensating mirror group and back fixed mirror group of back component zoom system's focusing mirror group, trimming space ring, adjusts the axial interval of each lens and their whole axial interval with other structures through trimming space ring, guarantees the interval requirement between the lens of optics.

10. The utility model provides a pair of miniaturized mechanical structure that zooms in succession, the surface of detector is the processing of radiation protection coating, and the internal surface is electrically conductive processing to guarantee that overlap resistance satisfies the designing requirement.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of an embodiment of a miniaturized continuous zooming mechanical structure of the present invention (a top plate of a box is not shown);

FIG. 2 is a schematic structural diagram of an embodiment of a compact continuous zooming mechanism of the present invention (the top plate and the third side plate of the case are not shown);

FIG. 3 is a schematic structural view of another direction of the compact continuous zoom mechanism of the present invention (the top plate and the third side plate of the case are not shown);

fig. 4 is a schematic structural view of a rear component continuous zoom system according to an embodiment of the present invention (the lower half of the support frame is not shown);

fig. 5 is a schematic structural view of the rear component continuous zoom system in another direction according to the embodiment of the present invention (the lower half of the supporting frame is not shown);

fig. 6 is an internal structural view of a rear component continuous zoom system according to an embodiment of the present invention.

The reference numerals are illustrated below:

1-box, 101-first side plate, 102-second side plate, 103-third side plate, 104-fourth side plate, 105-fifth side plate, 106-sixth side plate;

2-a primary mirror; 3-a secondary mirror; 4-a support frame;

5-front fixed group, 501-front fixed lens barrel, 502-focusing lens group, 503-focusing moving barrel, 504-focusing cam barrel, 505-first motor, 506-first large gear ring, 507-first chute, 508-first limit switch, 509-first baffle;

6-zoom compensation group, 601-straight groove cylinder, 602-zoom lens group, 603-compensation lens group, 604-zoom carriage, 605-compensation carriage, 606-zoom compensation cam cylinder, 607-second motor, 608-second large gear ring, 609-second chute, 610-third chute, 611-second limit switch, 612-second baffle plate;

7-rear fixed group, 701-rear fixed lens barrel, 702-rear fixed lens group;

8-a detector; 9-main lens base; 10-primary mirror trim pad; 11-secondary lens base; 12-lateral adjustment of the shim; 13-vertical adjustment of the shim.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the technical scheme of the utility model, other embodiments that ordinary person in the art obtained under the prerequisite of not making creative work all should belong to the scope of the protection of the utility model.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Meanwhile, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inside and outside" and the like are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed in a specific direction and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The terms "mounted, connected and connected" in the present application are to be understood broadly, unless otherwise explicitly stated or limited, for example: can be fixedly connected, detachably connected or integrally connected: they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A miniaturized continuous zooming mechanical structure comprises a box body 1, a front component optical system and a rear component continuous zooming system.

As shown in fig. 1, the case 1 includes a first side plate 101, a second side plate 102, a third side plate 103, a fourth side plate 104, a fifth side plate 105, a sixth side plate 106, a top plate, and a bottom plate; to meet the optical system requirements in this embodiment, the angle between the first side plate 101 and the second side plate 102 is 163 °, the angle between the second side plate 102 and the third side plate 103 is 162 °, the angle between the third side plate 103 and the fourth side plate 104 is 90 °, the angle between the fourth side plate 104 and the fifth side plate 105 is 107 °, the angle between the fifth side plate 105 and the sixth side plate 106 is 108 °, and the angle between the sixth side plate 106 and the first side plate 101 is 90 °.

As shown in fig. 2 and 3, the front group optical system includes a primary mirror base 9 fixed to the fifth side plate 105, a primary mirror 2 mounted on the primary mirror base 9, a primary mirror trimming pad 10 mounted between the primary mirror base 9 and the fifth side plate 105, a secondary mirror base 11 fixed to the second side plate 102, a secondary mirror 3 mounted on the secondary mirror base 11, and a lateral adjustment pad 12 and a vertical adjustment pad 13 mounted between the secondary mirror base 11 and the second side plate 102. The primary mirror 2 and the secondary mirror 3 are sequentially arranged along a light path to form an off-axis two-mirror optical system, the optical axis of the primary mirror 2 is located at the eccentric 120mm position on the primary optical axis, the primary mirror 2 rotates around the optical axis anticlockwise by 18 degrees, the secondary mirror 3 is located at the eccentric 33mm position under the primary optical axis, the secondary mirror 3 rotates around the optical axis anticlockwise by 17 degrees, the secondary mirror 3 is located behind the primary image surface of the primary mirror 2 and is used for converting a converged light beam into parallel light to form a front telescope for amplification, and the focal length and the aperture of an incident light beam of a target system can be compressed.

As shown in fig. 3-6, the rear group continuous zoom system is located on the emergent light path of the secondary mirror 3, is disposed between the second side plate 102 and the fourth side plate 104, and includes a supporting frame 4 fixed on the bottom plate of the box 1, a front fixing group 5, a zoom compensation group 6, a rear fixing group 7, and a detector 8, which are fixed on the supporting frame 4 and sequentially disposed along the light path.

The front fixing group 5 is arranged at the front end of the support frame 4 and comprises a focusing driving group, a front fixing lens barrel 501 and a focusing lens group 502 arranged in the front fixing lens barrel 501; the focusing lens group 502 is driven by the focusing driving group to reciprocate along the axial direction of the front fixed lens barrel 501.

The zooming compensation group 6 comprises a zooming driving group, a straight groove cylinder 601 fixedly communicated with the rear end of the front fixed lens cylinder 501, a zooming lens group 602 and a compensation lens group 603 which are sequentially arranged in the straight groove cylinder 601; the zoom lens group 602 and the compensation lens group 603 reciprocate along the axial direction of the straight grooved drum 601 under the driving of the zoom driving group, and the moving directions of the zoom lens group 602 and the compensation lens group 603 are opposite.

The rear fixing group 7 includes a rear fixing barrel 701 fixedly communicated with the rear end of the straight barrel 601 and a rear fixing lens group 702 mounted on the inner side wall of the rear fixing barrel 701.

The detector 8 is fixed at the rear end of the support frame 4 and is arranged close to the rear fixing group 7 for receiving optical signals. The focal plane detector of the space continuous zooming system needs to take uniform consideration to low-pressure use environments such as impact vibration resistance, lap resistance, EMC and the like besides the installation of a circuit board during design. The detector 8 of the utility model is designed, arranged and installed independently, and is fully considered in structural form, so as to meet the requirements of low-pressure use environment and mechanics experiment; in addition, the outer surface of the detector 8 is subjected to radiation protection coating treatment, and the inner surface is subjected to conductive treatment, so that the lap resistance can meet the design requirement.

Compared with the prior continuous zooming system, the utility model has the advantages that the front component optical system is arranged on the main mirror of the fifth side plate of the box body and the secondary mirror of the second side plate of the box body to form an off-axis two-mirror optical system, which changes the converged light beam into parallel light to form a front telescope for amplification and can compress the focal length of a target system and the caliber of an incident light beam; the rear component continuous zooming system is arranged behind the secondary mirror to provide a continuous zooming function; the combination of front component optical system and back component continuous zoom system can make the utility model discloses the function of the continuous zoom of big zoom ratio, big visual field, long focal length is realized taking up under less space volume to obtain high-quality observation image.

In order to make the main part's such as front component optical system's primary mirror 2 and secondary mirror 3, rear component continuous zoom system focusing drive group, zoom drive group structure more reasonable, the utility model discloses a concrete structure of above parts as follows:

in the structural design process of the front component optical system, considering that the aerospace environment is complex, the temperature changes violently, the thermal stress caused by the mismatch of the linear expansion coefficients of the primary mirror 2, the secondary mirror 3 and the supporting structure can seriously reduce the surface shape precision of the primary mirror 2 and the secondary mirror 3, and the imaging quality of the system is reduced, so in the design of the supporting structures of the primary mirror 2 and the secondary mirror 3, the influence of the environmental temperature and the assembly stress on the surface shape of the reflecting mirror is considered at the same time, and the primary mirror seat 9, the primary mirror trimming pad 10, the secondary mirror seat 11, the transverse adjusting pad 12 and the vertical adjusting pad 13 are designed and are respectively used as the supporting structures of the primary mirror 2 and the secondary mirror 3. The primary mirror 2 and the secondary mirror 3 are fixedly connected with the supporting structure after optical processing and film coating are finished, then the primary mirror 2 assembly and the secondary mirror 3 assembly are installed on the box body 1, and the primary mirror 2 and the secondary mirror 3 are guaranteed to meet the tolerance requirement of the optical system design.

When the front component optical system works: the designed primary mirror seat 9, the primary mirror trimming pad 10, the secondary mirror seat 11, the transverse adjusting gasket 12 and the vertical adjusting gasket 13 not only ensure the surface shape precision of the primary mirror 2 and the secondary mirror 3, but also adjust the axial distance and the relative angle between the primary mirror 2 and the secondary mirror 3 by adjusting the transverse adjusting gasket 12 and the vertical adjusting gasket 13 so as to ensure that the primary mirror 2 arranged on the fifth side plate 105 of the box body 1 and the secondary mirror 3 arranged on the fifth side plate 105 of the box body 1 have accurate space positions; a front telescope for amplification is formed by the primary mirror 2 and the secondary mirror 3, and the focal length and the aperture of an incident beam of a target system are compressed, so that the focal length and the aperture of the rear component continuous zooming system are reduced.

The focusing driving set of the rear component continuous zooming system comprises a focusing moving cylinder 503 coaxially sleeved in the front fixed lens barrel 501, a focusing cam cylinder 504 coaxially sleeved outside the front fixed lens barrel 501, a first motor 505 fixedly installed on the support frame 4, a first limit switch 508 installed on the support frame 4 and a first driving pin. The focusing lens group 502 is fixedly arranged on the inner side wall of the focusing moving cylinder 503; a first large gear ring 506 is circumferentially arranged on the outer surface of the focusing cam barrel 504, and a first gear mounted on the output end of the first motor 505 is meshed with the first large gear ring 506; two first inclined grooves 507 are formed in the side wall of the focusing cam barrel 504; two first straight grooves are correspondingly formed in the side wall of the front fixed lens barrel 501; the first driving nail sequentially penetrates through the corresponding first inclined groove 507 and the first straight groove and then is fixedly connected with the focusing moving cylinder 503; the focus cam barrel 504 is provided with a first shutter 509, and the first limit switch 508 is engaged with the first shutter 509 to open and close the first limit switch 508.

The zooming driving set of the rear component continuous zooming system comprises a zooming sliding frame 604, a compensation sliding frame 605, a zooming compensation cam cylinder 606, a second motor 607, a second limit switch 611, a second driving nail and a third driving nail, wherein the zooming sliding frame 604 and the compensation sliding frame 605 are coaxially sleeved on the inner side of the straight groove cylinder 601 in sequence, the zooming compensation cam cylinder 606 is coaxially sleeved on the outer side of the straight groove cylinder 601, the second motor 607 is fixedly installed on the supporting frame 4, and the second limit switch 611, the second driving nail and the third driving nail are installed on the supporting frame 4. The zoom lens group 602 is fixedly arranged on the inner side wall of the zoom carriage 604, and the compensation lens group 603 is fixedly arranged on the inner side wall of the compensation carriage 605; a second large gear ring 608 is arranged on the outer surface of the zoom compensation cam barrel 606 along the circumferential direction, and a second gear installed at the output end of the second motor 607 is engaged with the second large gear ring 608; the side wall of the zoom compensation cam barrel 606 is provided with two second inclined grooves 609 and a third inclined groove 610, and the second inclined grooves 609 and the third inclined groove 610 are in a normal distribution state; two second straight grooves and a third straight groove are correspondingly formed in the side wall of the straight groove cylinder 601; the second driving nail sequentially penetrates through the corresponding second inclined groove 609 and the second straight groove and then is fixedly connected with the zoom lens group 602, and the third driving nail sequentially penetrates through the corresponding third inclined groove 610 and the third straight groove and then is fixedly connected with the compensating lens group 603; the zoom compensation cam barrel 606 is provided with a second stopper 612, and the second limit switch 611 is turned on or off by matching the second limit switch 611 with the second stopper 612.

When the rear component continuous zooming system works:

a first gear at the output end of the first motor 505 of the focusing driving group drives the first large gear ring 506 to rotate, so as to drive the focusing cam barrel 504 to rotate by taking the central shaft of the front fixed lens barrel 501 as the axis, and the focusing moving barrel 503 connected with the first driving pin drives the focusing lens group 502 to axially reciprocate, so as to achieve the purpose of focusing. In the process, the first driving pin slides in the front fixed barrel 501 through the first straight groove, and the degree of freedom in one circumferential direction is limited; the focusing moving cylinder 503 performs axial reciprocating linear motion in a shaft hole matching manner, and the hole is in clearance fit with the shaft to limit the degree of freedom in 4 directions; the first limit switch 508 and the first blocking piece 509 are matched to realize on-off of the first limit switch 508, so that the initial position of the focusing part is detected, and automatic focusing is finally realized.

On the other hand, the second gear of the second motor 607 of the zoom driving set drives the second ring gear 608 to rotate, so as to drive the zoom compensation cam cylinder 606 to rotate around the central axis of the straight cylinder 601, the zoom carriage 604 connected with the second driving pin drives the zoom lens set 602 to reciprocate axially, and the compensation carriage 605 connected with the third driving pin drives the compensation lens set 603 to reciprocate axially opposite to the zoom carriage 604. Because the front end of the zoom lens group 602 is connected with the front fixed group 5, and the rear end of the compensation lens group 603 is connected with the rear fixed group 7, when the zoom lens group 602 moves linearly with the zoom carriage 604, the closer the zoom carriage 604 is to the focusing lens group 502 of the front fixed group 5, the smaller the magnification of the camera, and vice versa; the compensating mirror group 603 compensates each image point of different focal lengths with the compensating carriage 605 onto the rear fixed mirror group 702; the rear fixed mirror group 702 only lengthens the rear pitch of the optical system so that the image point falls on the CCD image plane. In the process, the second driving nail and the third driving nail slide in the straight grooved cylinder 601 through the second straight groove and the third straight groove, so that the degree of freedom in one circumferential direction is limited; the zooming carriage 604 and the compensating carriage 605 do axial reciprocating linear motion in a shaft hole matching mode, and the holes are in clearance fit with the shaft to limit the freedom degrees in 4 directions; the second limit switch 611 and the second stopper 612 cooperate to realize the on-off of the second limit switch 611, so as to detect the initial position of the zoom compensation cam barrel 606, thereby realizing the continuous switching of large, medium and small fields of view.

The focusing lens group 502, the zoom lens group 602, the compensating lens group 603 and the rear fixing lens group 702 of the rear component continuous zooming system all have a plurality of lenses, and the alignment centering processing is adopted to ensure the consistency with the central axis of the straight grooved cylinder 601. Each lens is independently provided with a centering frame, and independent centering processing and assembly are adopted, so that the reliability of the lens group in high-low temperature and vibration environments and the imaging precision of the whole zoom system are ensured. The front and the back of each lens are provided with trimming space rings, the axial intervals of the lenses and the axial intervals between the whole lenses and other structures are adjusted through the trimming space rings, and the requirement on the intervals between the optical lenses is met. The first driving nail, the second driving nail and the third driving nail are all two groups so as to ensure the smoothness of the driving system.

In this embodiment, the front component optical system compresses the focal length and caliber of the target system, and the focal length of the rear component continuous zoom system is about 1/4 of the focal length of the target system, so the rear component continuous zoom system structure is about 1/4 of the conventional optical structure, but the front component optical system structure protrudes a certain length in front of the transmission optical system, and under the condition that the focal length, caliber and zoom ratio indexes are the same, the miniaturized continuous zoom mechanical structure provided by this embodiment is only 1/3 of the volume of the conventional continuous zoom optical system, effectively compresses the optical system structure, and realizes the structural miniaturization of the whole system. Because the utility model provides a pair of miniaturized zoom in succession mechanical structure can be under occuping less space volume realize the function that zooms in succession of big zoom ratio, big visual field, long focal length to obtain high-quality observation image, have compact structure, the characteristics that the price/performance ratio is high, so have good market perspective.

Claims (10)

1. A miniaturized continuous zooming mechanical structure is characterized in that: comprises a box body (1), a front component optical system and a rear component continuous zooming system;

the box body (1) comprises a first side plate (101), a second side plate (102), a third side plate (103), a fourth side plate (104), a fifth side plate (105), a sixth side plate (106), a top plate and a bottom plate;

the front component optical system comprises a main mirror (2) arranged on a fifth side plate (105) and a secondary mirror (3) arranged on a second side plate (102); the primary mirror (2) and the secondary mirror (3) are sequentially arranged along a light path to form an off-axis two-mirror optical system, and the secondary mirror (3) is positioned behind a primary image surface of the primary mirror (2) and is used for converting a converged light beam into parallel light;

the rear component continuous zooming system is positioned on an emergent light path of the secondary mirror (3), is arranged between the second side plate (102) and the fourth side plate (104), and comprises a support frame (4) fixed on a bottom plate of the box body (1), a front fixing group (5), a zoom compensation group (6), a rear fixing group (7) and a detector (8), wherein the front fixing group, the zoom compensation group, the rear fixing group and the detector are sequentially arranged on the support frame (4) along the light path;

the front fixing group (5) is arranged at the front end of the support frame (4) and comprises a focusing driving group, a front fixing lens barrel (501) and a focusing lens group (502) arranged in the front fixing lens barrel (501); the focusing lens group (502) is driven by the focusing driving group to reciprocate along the axial direction of the front fixed lens cone (501);

the zooming compensation group (6) comprises a zooming driving group, a straight groove cylinder (601) fixedly communicated with the rear end of the front fixed lens cylinder (501), a zooming lens group (602) and a compensation lens group (603) which are sequentially arranged in the straight groove cylinder (601); the zooming lens group (602) and the compensating lens group (603) are driven by the zooming driving group to reciprocate along the axial direction of the straight grooved drum (601), and the moving directions of the zooming lens group (602) and the compensating lens group (603) are opposite;

the rear fixing group (7) comprises a rear fixing lens barrel (701) fixedly communicated with the rear end of the straight groove barrel (601) and a rear fixing lens group (702) fixedly arranged on the inner side wall of the rear fixing lens barrel (701);

the detector (8) is fixed at the rear end of the support frame (4) and is arranged close to the rear fixing group (7).

2. A miniaturised zoom mechanism according to claim 1, characterised in that: the front component optical system further comprises a main lens base (9) fixed on the fifth side plate (105) and a main lens trimming pad (10) installed between the main lens base (9) and the fifth side plate (105), and the main lens (2) is installed on the fifth side plate (105) through the main lens base (9) and the main lens trimming pad (10).

3. A miniaturised zoom mechanism according to claim 2, characterised in that: the front component optical system further comprises a secondary lens seat (11) fixed on the second side plate (102), and a transverse adjusting gasket (12) and a vertical adjusting gasket (13) which are arranged between the secondary lens seat (11) and the second side plate (102), and the secondary lens (3) is arranged on the second side plate (102) through the secondary lens seat (11) and the transverse adjusting gasket (12) and the vertical adjusting gasket (13).

4. The mechanical structure of claim 3, wherein the focus driving assembly comprises a focus moving cylinder (503) coaxially sleeved inside the front fixed lens barrel (501), a focus cam cylinder (504) coaxially sleeved outside the front fixed lens barrel (501), a first motor (505) fixedly mounted on the support frame (4), and a first driving pin;

the focusing mirror group (502) is fixedly arranged on the inner side wall of the focusing moving cylinder (503);

a first large gear ring (506) is arranged on the focusing cam barrel (504) along the circumferential direction of the outer surface, and a first gear mounted at the output end of the first motor (505) is meshed with the first large gear ring (506);

a first inclined groove (507) is formed in the side wall of the focusing cam barrel (504);

the side wall of the front fixed lens barrel (501) is correspondingly provided with a first straight groove;

the first driving nail sequentially penetrates through the corresponding first inclined groove (507) and the first straight groove and then is fixedly connected with the focusing moving cylinder (503).

5. A miniaturised zoom mechanism according to claim 4, characterised in that: the zooming driving group comprises a zooming sliding frame (604), a compensation sliding frame (605), a zooming compensation cam cylinder (606), a second motor (607), a second driving nail and a third driving nail, wherein the zooming sliding frame (604) and the compensation sliding frame (605) are sequentially coaxially sleeved on the inner side of the straight slot cylinder (601), the zooming compensation cam cylinder (606) is coaxially sleeved on the outer side of the straight slot cylinder (601), and the second motor (607), the second driving nail and the third driving nail are fixedly installed on the supporting frame (4);

the zoom lens group (602) is fixedly arranged on the inner side wall of the zoom sliding frame (604);

the compensating mirror group (603) is fixedly arranged on the inner side wall of the compensating sliding frame (605);

a second large gear ring (608) is arranged on the zoom compensation cam cylinder (606) along the circumferential direction of the outer surface, and a second gear arranged at the output end of the second motor (607) is meshed with the second large gear ring (608);

the side wall of the zoom compensation cam cylinder (606) is provided with a second chute (609) and a third chute (610) in opposite directions corresponding to the zoom lens group (602) and the compensation lens group (603), and the second chute (609) and the third chute (610) are in a normal distribution state;

a second straight groove and a third straight groove are correspondingly formed in the side wall of the straight groove barrel (601);

the second driving nail sequentially penetrates through the corresponding second inclined groove (609) and the second straight groove and then is fixedly connected with the zoom lens group (602);

and the third driving nail sequentially penetrates through the corresponding third inclined groove (610) and the third straight groove and then is fixedly connected with the compensating mirror group (603).

6. A miniaturised zoom mechanism according to claim 5, characterised in that: each lens of the focusing lens group (502), the zoom lens group (602), the compensation lens group (603) and the rear fixing lens group (702) is provided with an independent centering frame.

7. A miniaturised zoom mechanism according to claim 6, characterised in that: and trimming space rings are arranged at the front and the rear of each lens of the focusing lens group (502), the zoom lens group (602), the compensating lens group (603) and the rear fixing lens group (702).

8. A miniaturised zoom mechanism according to claim 7, characterised in that: the focusing driving set further comprises a first limit switch (508) arranged on the supporting frame (4) and a first blocking piece (509) which is arranged on the focusing cam barrel (504) and matched with the first limit switch (508).

9. A miniaturised zoom mechanism according to claim 8, characterised in that: the zooming driving group also comprises a second limit switch (611) arranged on the supporting frame (4) and a second baffle plate (612) which is arranged on the zooming compensation cam barrel (606) and is matched with the second limit switch (611).

10. A miniaturised zoom mechanism according to claim 9, characterised in that: the outer surface of the detector (8) is subjected to radiation protection coating treatment, and the inner surface is subjected to conductive treatment.

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