CN218767762U

CN218767762U - Fixed-focus lens base for light and small remote sensing camera

Info

Publication number: CN218767762U
Application number: CN202223170925.XU
Authority: CN
Inventors: 张军强; 李先峰; 周金鹏; 周学顺
Original assignee: Changguang Yusense Information Technology And Equipment Qingdao Co ltd
Current assignee: Changguang Yusense Information Technology And Equipment Qingdao Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-28
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a prime lens base for light and small remote sensing camera, including base and ladder screw thread sleeve, the bottom surface of base inwards caves in and forms circular recess, the top surface middle part of base outwards bulges and forms lens external screw thread seat section of thick bamboo, have the external screw thread on the outer wall of lens external screw thread seat section of thick bamboo, the top surface middle part of lens external screw thread seat section of thick bamboo inwards caves in and forms the through-hole, the bottom of through-hole extends to the diapire of circular recess and communicates with this circular recess; the top of the stepped threaded sleeve is in threaded connection with the external thread of the lens, the middle and the bottom of the stepped threaded sleeve are in threaded connection with the external thread on the lens external thread seat barrel, and the outer side of the bottom of the stepped threaded sleeve is provided with a locking ring. The utility model discloses avoided the screw thread friction to produce the structure piece, ensured image sensor surface cleanliness factor, simultaneously, can not produce axial power during locking.

Description

Fixed-focus lens base for light and small remote sensing camera

Technical Field

The utility model relates to a remote sensing camera technical field especially relates to a tight shot base for light small-size remote sensing camera.

Background

In national economy, social development and national defense safety, 80% of human information needs are related to geographic spatial positions, and remote sensing has the characteristic of macroscopically, dynamically and accurately monitoring surface environment changes and is increasingly applied. Remote sensing of earth observation electromagnetic wave signals can be understood as data acquisition, and then quantitative inversion or deduction of some geological or biological information, wherein optical remote sensing is one of the main means.

The light and small remote sensing camera is widely used as a low-cost and small optical remote sensing image acquisition device. The camera needs to perform strict sensor radiation calibration and geometric calibration processes for later quantitative analysis application, has strict requirements on image quality, and needs to acquire clear images through focusing in an integration stage besides reasonable optical design and sensor matching.

At present, most of fixed focus lens products with M12 thread specifications are adopted, as shown in figure 1, the lens 1 is provided with external threads engraved on a lens barrel 2, a base 3 for matching and installing the lens 1 is engraved with internal threads with the same specification, and the lens 1 is rotated during focusing production to cause the lens 1 to move axially, so that the distance from the optical center of the lens 1 to the plane of an image sensor is changed, and the fixed focus lens is used for adjusting the focal length to obtain a clear image of an object.

In the prior art, in order to achieve the best effect, the lens 1 is repeatedly screwed in the manual operation process, and friction between threads is caused by repeated screwing, and the adhesive force of the surfaces of materials of the lens 1 and the base 3 is not enough, so that thread fragments of the lens barrel 2 or the lens 1 fall off, and after the fragments are adhered to an image sensor, the image quality is greatly influenced.

Meanwhile, the lens 1 is locked by a nut focus locking mode generally, and is locked by friction force generated by extruding screw teeth by a nut, so that the focal length can be changed in the locking process.

The image quality is reduced due to the foreign matter adhesion and the defocusing phenomenon, and the accuracy of quantitative inversion depending on image data is further influenced.

Accordingly, those skilled in the art have provided a fixed focus lens mount for a compact remote sensing camera to solve the problems set forth in the background art described above.

SUMMERY OF THE UTILITY MODEL

The utility model provides an it produces the structure piece to have avoided screw thread friction, has ensured image sensor surface cleanliness factor, simultaneously, can not produce a tight shot base that is used for light small-size remote sensing camera of axial power during locking.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model discloses a tight shot base for light small-size remote sensing camera, include:

the bottom surface of the base is inwards sunken to form a circular groove, the middle part of the top surface of the base is outwards protruded to form a lens external thread seat cylinder, external threads are arranged on the outer wall of the lens external thread seat cylinder, the middle part of the top surface of the lens external thread seat cylinder is inwards sunken to form a through hole, and the bottom end of the through hole extends to the bottom wall of the circular groove and is communicated with the circular groove;

the top of the stepped threaded sleeve is in threaded connection with the external threads of the lens, the middle and the bottom of the stepped threaded sleeve are in threaded connection with the external threads on the lens external thread seat barrel, and the outer side of the bottom of the stepped threaded sleeve is provided with a locking ring.

Further, the stepped threaded sleeve comprises:

the inner wall of the fixed lens threaded ring is provided with a first internal thread, and the first internal thread is in threaded connection with the external thread of the lens;

the fixed base threaded ring is arranged at the bottom end of the fixed lens threaded ring, a second internal thread is arranged on the inner wall of the fixed base threaded ring, and the second internal thread is in threaded connection with the external thread of the lens external thread seat barrel;

the top ends of the locking teeth are uniformly distributed on the bottom end of the threaded ring of the fixed base, third internal threads are arranged on the inner walls of the locking teeth, and the third internal threads of the locking teeth are in threaded connection with the external threads of the lens external thread seat barrel, and the thread height of the third internal threads is smaller than that of the external threads.

Furthermore, the inner diameter of the fixed base threaded ring is larger than that of the fixed lens threaded ring, and the inner cavity of the fixed base threaded ring is communicated with the inner cavity of the fixed lens threaded ring.

Furthermore, the fixed lens threaded ring, the fixed base threaded ring and the plurality of locking teeth are an integrated forming mechanism.

Furthermore, the joint of the top end of the through hole and the top end of the lens external thread seat cylinder is inwards sunken to form an arc-shaped surface.

Furthermore, the middle parts of the two sides of the base respectively protrude outwards to form lugs, and threaded through holes are formed in the middle parts of the top surfaces of the lugs.

Further, the inner wall of the locking ring has a plurality of locking portions, and the number of the locking portions is the same as the number of the locking teeth.

Furthermore, the number of the locking teeth and the number of the locking parts are four.

Furthermore, the locking part comprises a stop bulge, a stop section, a sliding locking section and an unlocking section which are connected in sequence, the stop bulge is connected with the unlocking section of the adjacent locking part, the distance from the stop bulge to the circle center of the locking ring is less than the distance from the stop section to the circle center of the locking ring, and the distance from the outer wall of the stop bulge to the circle center of the locking ring is the same as the outer diameter of the lens external thread seat cylinder; the distance from the joint of the sliding lock section and the stopping section to the circle center of the locking ring is larger than the distance from the stopping section to the circle center of the locking ring and smaller than the distance from the outer wall of the stopping protrusion to the circle center of the locking ring, the distance from the joint of the sliding lock section and the unlocking section to the circle center of the locking ring is smaller than the distance from the joint of the sliding lock section and the stopping section to the circle center of the locking ring, the outer side surface of the sliding lock section is an arc transition surface, the distance from the unlocking section to the circle center of the locking ring is the same as the outer diameter of the whole locking teeth, and the arc length of the unlocking section and the arc length of the stopping section are both the same as the arc length of the locking teeth.

In the technical scheme, the utility model provides a pair of a tight shot base for light small-size remote sensing camera has following beneficial effect:

1. the lens barrel adopts the rotation of the stepped threaded sleeve and the external threaded seat barrel of the lens to drive the lens to move axially, so that the focal length is changed, the generation of chips in the lens barrel is avoided, and the image quality is ensured;

2. this application can realize locking or releasing the position of step screw sleeve on camera lens external screw thread seat section of thick bamboo through rotatory lock ring, and focus change avoids appearing in control camera lens and the base relative distance that can be convenient to obtain best quality's image.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

FIG. 1 is a cross-sectional view of a prior art light and small telemetric camera;

fig. 2 is a perspective view of a fixed focus lens base for a small and light remote sensing camera according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a cross-sectional view of the stepped threaded sleeve of FIG. 2;

FIG. 5 is a perspective view of the base of FIG. 2;

FIG. 6 is a front view of the base of FIG. 2;

FIG. 7 is a top view of the locking ring of FIG. 2;

fig. 8 is a reference diagram of a usage status of a fixed focus lens mount for a small and light remote sensing camera according to an embodiment of the present invention;

fig. 9 is a cross-sectional view of fig. 8.

Description of reference numerals:

1. a lens; 2. a lens barrel; 3. a base;

10. a base; 11. a circular groove; 12. a lens external thread seat cylinder; 13. an external thread; 14. a through hole; 15. an arc-shaped surface; 16. a lug; 17. a threaded through hole;

20. a stepped threaded sleeve; 21. fixing the lens threaded ring; 22. a first internal thread; 23. fixing a base threaded ring; 24. a second internal thread; 25. locking teeth; 26. a third internal thread;

30. locking a ring; 31. a stop projection; 32. a stop section; 33. a slide lock section; 34. an unlocking section;

40. and (5) a lens.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

See fig. 2-8;

an embodiment of the utility model provides a tight shot base for light small-size remote sensing camera, include:

the sensor light transmission structure comprises a base 10, wherein the bottom surface of the base 10 is inwards recessed to form a circular groove 11, the middle part of the top surface of the base 10 is outwards protruded to form a lens external thread seat barrel 12, an external thread 13 is arranged on the outer wall of the lens external thread seat barrel 12, the middle part of the top surface of the lens external thread seat barrel 12 is inwards recessed to form a through hole 14, the bottom end of the through hole 14 extends to the bottom wall of the circular groove 11 and is communicated with the circular groove 11, and the base 10 is used for sealing a sensor light transmission space;

the top of the stepped threaded sleeve 20 is in threaded connection with the external thread of the lens 40, the middle and the bottom of the stepped threaded sleeve 20 are in threaded connection with the external thread 13 on the lens external thread seat barrel 12, and the outer side of the bottom of the stepped threaded sleeve 20 is provided with a locking ring 30; the stepped threaded sleeve 20 is made of a rigid material.

This application adopts the rotation of ladder thread sleeve 20 and the external screw thread seat section of thick bamboo 12 of camera lens to drive camera lens 40 axial displacement, changes the focus, avoids the inside piece that produces of lens cone 40.

As shown in fig. 2-3;

the stepped threaded sleeve 20 includes:

the fixed lens threaded ring 21 is provided with a first internal thread 22 on the inner wall of the fixed lens threaded ring 21, and the first internal thread 22 is in threaded connection with the external thread of the lens 40;

the fixed base threaded ring 23 is arranged at the bottom end of the fixed lens threaded ring 21, a second internal thread 24 is arranged on the inner wall of the fixed base threaded ring 23, and the second internal thread 24 is in threaded connection with the external thread 13 of the lens external thread seat barrel 12;

four locking teeth 25, four the top evenly distributed of locking tooth 25 is on the bottom of unable adjustment base screw ring 23, four have third internal thread 26 on the inner wall of locking tooth 25, four threaded connection between the third internal thread 26 of locking tooth 25 and the external screw thread 13 of the external screw thread seat section of thick bamboo 12 of camera lens, and the thread height of third internal thread 26 is less than the thread height of external screw thread 13.

The inner diameter of the fixed base threaded ring 23 is larger than the inner diameter of the fixed lens threaded ring 21, and the inner cavity of the fixed base threaded ring 23 is communicated with the inner cavity of the fixed lens threaded ring 21. The fixed lens threaded ring 21, the fixed base threaded ring 23 and the four locking teeth 25 are an integrated forming mechanism.

See FIGS. 2-3, 5-6, and 9;

the joint of the top end of the through hole 14 and the top end of the lens external thread seat cylinder 12 is inwards recessed to form an arc-shaped surface 15, and the diameter of the arc-shaped surface is the same as the nominal diameter of the external thread of the lens 40. The middle parts of the two sides of the base 10 respectively protrude outwards to form lugs 16, and the middle part of the top surface of each lug 16 is provided with a threaded through hole 17.

See fig. 2-3, 7;

the inner wall of the locking ring 30 has four locking portions, the number of which is the same as the number of the locking teeth 25. The locking part comprises a stop protrusion 31, a stop section 32, a slide locking section 33 and an unlocking section 34 which are connected in sequence, the stop protrusion 31 is connected with the unlocking section 34 of the adjacent locking part, the distance from the stop protrusion 31 to the center of a circle of the locking ring 30 is less than the distance from the stop section 32 to the center of a circle of the locking ring 30, and the distance from the outer wall of the stop protrusion 31 to the center of a circle of the locking ring 30 is the same as the outer diameter of the lens external thread socket barrel 12; the distance from the joint of the sliding locking section 33 and the stopping section 32 to the center of the locking ring 30 is greater than the distance from the stopping section 32 to the center of the locking ring 30 and less than the distance from the outer wall of the stopping protrusion 31 to the center of the locking ring 30, the distance from the joint of the sliding locking section 33 and the unlocking section 34 to the center of the locking ring 30 is less than the distance from the joint of the sliding locking section 33 and the stopping section 32 to the center of the locking ring 30, the outer side surface of the sliding locking section 33 is an arc transition surface, the distance from the unlocking section 34 to the center of the locking ring 30 is the same as the overall outer diameter of the four locking teeth 25, and the arc length of the unlocking section 34 and the arc length of the stopping section 32 are both the same as the arc length of the locking teeth 25.

The concrete assembly steps are as follows:

1. the locking ring 30 is nested from the top end of the base 10.

2. The lens 40 is screwed into the stepped threaded sleeve 20 from the top end of the fixed lens threaded ring 21 and screwed to the threaded ends of the stepped threaded sleeve 20 and the lens 40, so that the supporting surface of the threaded sleeve 20 is fitted with the supporting surface of the lens 40, and the assembly of the stepped threaded sleeve 20 is cleaned.

3. The stepped screw sleeve 20 is fitted into the lens male screw holder cylinder 12 from the top end direction of the base 10, and the stepped screw sleeve 20 is further screwed and fitted onto the bottom end of the male screw 13.

4. The stepped threaded sleeve 20 is rotated to perform fine focus adjustment.

5. The locking ring 30 is snapped into place over the locking teeth 25 of the stepped threaded sleeve 20 and the locking ring 30 is rotated to bring the locking teeth 25 to the stop 32 to lock the stepped threaded sleeve 20. The locking ring 30 can be rotated to lock or release the position of the stepped threaded sleeve 20 on the lens external thread socket 12, so as to avoid the phenomenon of focal length change caused by directly locking the lens, thereby obtaining an image with the best quality.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. A prime lens mount for a light and small remote sensing camera, comprising:

the bottom surface of the base (10) is inwards recessed to form a circular groove (11), the middle part of the top surface of the base (10) is outwards protruded to form a lens external thread seat barrel (12), an external thread (13) is arranged on the outer wall of the lens external thread seat barrel (12), the middle part of the top surface of the lens external thread seat barrel (12) is inwards recessed to form a through hole (14), and the bottom end of the through hole (14) extends to the bottom wall of the circular groove (11) and is communicated with the circular groove (11);

the camera lens comprises a stepped threaded sleeve (20), wherein the top of the stepped threaded sleeve (20) is in threaded connection with the external thread of the camera lens, the middle and the bottom of the stepped threaded sleeve (20) are in threaded connection with the external thread (13) on the camera lens external thread seat barrel (12), and a locking ring (30) is installed on the outer side of the bottom of the stepped threaded sleeve (20).

2. The prime lens mount for a light and small remote sensing camera according to claim 1, wherein: the stepped threaded sleeve (20) comprises:

the fixed lens threaded ring (21) is provided with a first internal thread (22) on the inner wall of the fixed lens threaded ring (21), and the first internal thread (22) is in threaded connection with the external thread of the lens;

the fixed base threaded ring (23) is arranged at the bottom end of the fixed lens threaded ring (21), a second internal thread (24) is arranged on the inner wall of the fixed base threaded ring (23), and the second internal thread (24) is in threaded connection with the external thread (13) of the lens external thread seat barrel (12);

a plurality of locking tooth (25), it is a plurality of the top evenly distributed of locking tooth (25) is on the bottom of unable adjustment base screw ring (23), and is a plurality of have third internal thread (26) on the inner wall of locking tooth (25), it is a plurality of threaded connection between third internal thread (26) of locking tooth (25) and external screw thread (13) of camera lens external screw thread seat section of thick bamboo (12), and the thread height of third internal thread (26) is less than the thread height of external screw thread (13).

3. The prime lens mount for a light remote sensing camera according to claim 2, wherein: the inner diameter of the fixed base threaded ring (23) is larger than that of the fixed lens threaded ring (21), and the inner cavity of the fixed base threaded ring (23) is communicated with the inner cavity of the fixed lens threaded ring (21).

4. The prime lens mount for a light and small remote sensing camera according to claim 3, wherein: the fixed lens threaded ring (21), the fixed base threaded ring (23) and the plurality of locking teeth (25) are an integrated forming mechanism.

5. The prime lens mount for a light remote sensing camera according to claim 1, wherein: the joint of the top end of the through hole (14) and the top end of the lens external thread seat barrel (12) is inwards sunken to form an arc-shaped surface (15).

6. The prime lens mount for a light remote sensing camera according to claim 1, wherein: the middle parts of two sides of the base (10) are respectively protruded outwards to form lugs (16), and the middle part of the top surface of each lug (16) is provided with a threaded through hole (17).

7. The prime lens mount for a light remote sensing camera according to claim 2, wherein: the inner wall of the locking ring (30) has a plurality of locking portions, the number of which is the same as the number of the locking teeth (25).

8. The prime lens mount for a light remote sensing camera according to claim 7, wherein: the number of the locking teeth and the number of the locking parts are four.

9. The prime lens mount for a light remote sensing camera according to claim 8, wherein: the locking part comprises a stop protrusion (31), a stop section (32), a sliding locking section (33) and an unlocking section (34) which are sequentially connected, the stop protrusion (31) is connected with the unlocking section (34) of the adjacent locking part, the distance from the stop protrusion (31) to the circle center of the locking ring (30) is smaller than the distance from the stop section (32) to the circle center of the locking ring (30), and the distance from the outer wall of the stop protrusion (31) to the circle center of the locking ring (30) is the same as the outer diameter of the lens external thread seat cylinder (12); the distance from the joint of the sliding locking section (33) and the stopping section (32) to the center of the locking ring (30) is greater than the distance from the stopping section (32) to the center of the locking ring (30) and less than the distance from the outer wall of the stopping protrusion (31) to the center of the locking ring (30), the distance from the joint of the sliding locking section (33) and the unlocking section (34) to the center of the locking ring (30) is less than the distance from the joint of the sliding locking section (33) and the stopping section (32) to the center of the locking ring (30), the outer side surface of the sliding locking section (33) is an arc transition surface, the distance from the unlocking section (34) to the center of the locking ring (30) is the same as the overall outer diameter of the plurality of locking teeth (25), and the arc length of the unlocking section (34) and the arc length of the stopping section (32) are both the same as the arc length of the locking teeth (25).