CN215642015U - Large-light-transmission large-image-surface automatic focusing lens - Google Patents
Large-light-transmission large-image-surface automatic focusing lens Download PDFInfo
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- CN215642015U CN215642015U CN202121385398.7U CN202121385398U CN215642015U CN 215642015 U CN215642015 U CN 215642015U CN 202121385398 U CN202121385398 U CN 202121385398U CN 215642015 U CN215642015 U CN 215642015U
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Abstract
The utility model discloses a large-light-transmission large-image-surface automatic focusing lens which comprises a main cylinder, a front lens frame, a rear lens frame, a lens group and an automatic focusing mechanism, wherein the main cylinder is provided with a front lens frame and a rear lens frame; the front mirror frame is arranged on one side of the rear mirror frame, and the rear mirror frame is accommodated in the main cylinder; the lens group comprises a front lens group and a rear lens group, wherein lenses of the front lens group are separated from each other and are leaned against the inner part of the front frame, and lenses of the rear lens group are separated from each other and are leaned against the inner part of the rear frame; the automatic focusing mechanism comprises an automatic focusing assembly and an adjusting ring, the automatic focusing assembly is arranged on the side edge of the rear lens frame and is movably connected with the adjusting ring, so that the adjusting ring drives the rear lens frame to move relative to the main cylinder to realize automatic focusing. The front lens frame and the rear lens frame adopt a split structural design, the assembly difficulty of the lenses is reduced, the production yield of lens assembly is further improved, the rear lens frame moves relative to the main cylinder through the automatic focusing assembly to realize automatic focusing, and the lens is convenient to focus and adjust and high in focusing precision.
Description
Technical Field
The utility model relates to the technical field of lenses, in particular to an automatic focusing lens with large light transmission and large image surface.
Background
In an intelligent traffic system, the reliability of the whole system is affected by the performance of a monitoring lens, and an ITS lens has the main characteristics of high pixel, super night vision and the like, so that the ITS lens is widely applied to road monitoring of the intelligent traffic system. Most of existing ITS lenses adopt a fixed lens group structure, when the number of lenses of the lens group is large, the assembly difficulty of the lenses is high, the production yield of lens assembly is low, and the problem that automatic focusing cannot be achieved exists in the lens, so that the focusing adjustment of the lens is inconvenient and the focusing precision is low.
In addition, the current focusing lens applied to the intelligent transportation system is generally small in image surface and light passing, light entering brightness is low in a low-light environment, a shot image is dark, and shooting requirements of the intelligent transportation system in the low-light environment cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an automatic focusing lens with large light transmission and large image surface, which reduces the assembly difficulty of lenses, improves the production yield of lens assembly and has an automatic focusing function.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a large-light-transmission large-image-surface automatic focusing lens comprises a main cylinder, a front lens frame, a rear lens frame, a lens group and an automatic focusing mechanism;
the front mirror frame is arranged on one side of the rear mirror frame, and the rear mirror frame is accommodated in the main cylinder;
the lens group comprises a front lens group and a rear lens group, all lenses of the front lens group are separated from each other and lean against the inside of the front frame, and all lenses of the rear lens group are separated from each other and lean against the inside of the rear frame;
the automatic focusing mechanism comprises an automatic focusing assembly and an adjusting ring, the automatic focusing assembly is arranged on the side edge of the rear lens frame and is movably connected with the adjusting ring, so that the adjusting ring drives the rear lens frame to axially move back and forth relative to the main cylinder to realize automatic focusing.
Preferably, the automatic focusing mechanism still includes the facing, the facing includes outer interface circle and interior interface circle, outer interface circle and main section of thick bamboo looks spiro union, interior interface circle and back picture frame looks spiro union, the adjustable ring cover is located on the main section of thick bamboo, and with facing looks rigid coupling.
Preferably, the adjusting ring comprises a ring body and an outer gear ring, the ring body is fixedly connected with the tooth socket, the outer gear ring is arranged around the circumference of the ring body, and the automatic focusing assembly is used for driving the outer gear ring to rotate.
Preferably, the automatic focusing assembly comprises a connecting seat, a motor and a gear set, the connecting seat is fixedly arranged on the side edge of the main cylinder, the motor is arranged in the connecting seat, the gear set is connected with an output shaft of the motor, and the gear set is matched with the outer gear ring.
Preferably, the automatic IRIS diaphragm assembly further comprises a mounting ring and a P-IRIS, wherein the mounting ring is fixedly arranged in the front lens frame, and the P-IRIS is arranged on the mounting ring and is used for adjusting the size of the lens light through hole.
Preferably, the automatic focusing device further comprises a shell, wherein the shell comprises a base and a shell, the base is fixed at the bottom of the main cylinder, the shell is fixedly arranged in the base, and the automatic focusing mechanism and the automatic aperture assembly are located in the shell.
Preferably, the front lens group includes first to fifth lenses, the rear lens group includes sixth to fourteenth lenses, the first to fourteenth lenses are disposed along an optical axis in sequence from an object side to an image side, and the auto-stop assembly is disposed between the fifth lens and the sixth lens.
Preferably, each of the first to fourteenth lenses includes an object-side surface facing the object side and passing the image light, and an image-side surface facing the image side and passing the image light;
the first lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the second lens element with negative refractive index has a convex object-side surface and a concave image-side surface;
the third lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fourth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the fifth lens element has a positive refractive index, and the object-side surface and the image-side surface of the fifth lens element are flat and convex;
the sixth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the seventh lens element with a negative refractive index has a concave object-side surface and a concave image-side surface;
the eighth lens element with a positive refractive index has a convex object-side surface and a convex image-side surface;
the ninth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the tenth lens element with a negative refractive index has a convex object-side surface and a concave image-side surface;
the eleventh lens element with a positive refractive index has a convex object-side surface and a concave image-side surface;
the twelfth lens element has a positive refractive index, and an object-side surface and an image-side surface of the twelfth lens element are respectively a plane and a convex surface;
the thirteenth lens element with a negative refractive index has a concave object-side surface and a convex image-side surface;
the fourteenth lens element has a positive refractive index, and an object-side surface and an image-side surface of the fourteenth lens element are convex and planar.
Preferably, an image-side surface of the third lens and an object-side surface of the fourth lens are cemented with each other, an image-side surface of the seventh lens and an object-side surface of the eighth lens are cemented with each other, an image-side surface of the tenth lens and an object-side surface of the eleventh lens are cemented with each other, and an image-side surface of the twelfth lens and an object-side surface of the thirteenth lens are cemented with each other.
After adopting the technical scheme, compared with the background technology, the utility model has the following advantages:
1. the front lens frame and the rear lens frame adopt a split structural design, the assembly difficulty of the lenses is reduced, the production yield of lens assembly is further improved, and meanwhile, the rear lens frame axially moves back and forth relative to the main cylinder through the automatic focusing assembly to realize automatic focusing, so that the focusing adjustment of the lens is convenient, and the focusing precision is high.
2. The utility model adopts fourteen lenses, and through the arrangement design of the refractive index and the surface type of each lens, the lens has large image surface and large light transmission, can obtain more light inlet quantity, has brighter picture, and ensures the use effect of the lens in low-light environment.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an exploded view of the present invention;
FIG. 4 is a partial cross-sectional view of the present invention;
fig. 5 is a light path diagram of the present invention.
Description of reference numerals:
a main cylinder 100;
a front frame 200;
a rear frame 300;
a front lens group 410, a first lens 411, a second lens 412, a third lens 413, a fourth lens 414, a fifth lens 415, a back lens group 420, a sixth lens 421, a seventh lens 422, an eighth lens 423, a ninth lens 424, a tenth lens 425, an eleventh lens 426, a twelfth lens 427, a thirteenth lens 428, a fourteenth lens 429, a spacer 430 and a pressing ring 440;
the automatic focusing mechanism 500, the automatic focusing assembly 510, the connecting seat 511, the motor 512, the gear set 513, the adjusting ring 520, the ring body 521, the outer gear ring 522, the tooth socket 530, the outer interface ring 531 and the inner interface ring 532;
automatic IRIS assembly 600, mounting ring 610, P-IRIS 620;
a shell 700, a base 710, and a housing 720.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the apparatus or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.
Examples
With reference to fig. 1 to 4, the present invention discloses a large-light-transmission large-image-plane auto-focusing lens, which includes a main barrel 100, a front frame 200, a rear frame 300, a lens group, an auto-focusing mechanism 500, an auto-iris assembly 600, and a housing 700.
The front frame 200 is disposed at one side of the rear frame 300, and the rear frame 300 is received in the main tube 100.
The lens group includes a front lens group 410 and a rear lens group 420, the lenses of the front lens group 410 are spaced apart from each other and supported by the inner portion of the front frame 200, the lenses of the rear lens group 420 are spaced apart from each other and supported by the inner portion of the rear frame 300,
the auto-focusing mechanism 500 includes an auto-focusing assembly 510 and an adjusting ring 520, the auto-focusing assembly 510 is disposed on the side of the rear lens frame 300, and the auto-focusing assembly 510 is movably connected to the adjusting ring 520, so that the adjusting ring 520 drives the rear lens frame 300 to move back and forth in the axial direction relative to the main barrel 100 to achieve auto-focusing.
The automatic focusing mechanism 500 further comprises a tooth socket 530, the tooth socket 530 comprises an outer interface ring 531 and an inner interface ring 532, the outer interface ring 531 is in threaded connection with the main barrel 100, the inner interface ring 532 is in threaded connection with the rear lens frame 300, and the adjusting ring 520 is sleeved on the main barrel 100 and is fixedly connected with the tooth socket 530. The adjusting ring 520 comprises a ring body 521 and an outer gear ring 522, the ring body 521 is fixedly connected with the tooth socket 530, the outer gear ring 522 is arranged around the circumference of the ring body 521, and the auto focus assembly 510 is used for driving the outer gear ring 522 to rotate.
The auto-focusing assembly 510 includes a connection socket 511, a motor 512, and a gear set 513, wherein the connection socket 511 is fixedly disposed at a side of the main drum 100, the motor 512 is disposed in the connection socket 511, the gear set 513 is connected to an output shaft of the motor 512, and the gear set 513 is engaged with the outer gear ring 522.
During focusing, after the motor 512 outputs torque to drive the gear set 513, the gear set 513 drives the adjusting ring 520, and the adjusting ring 520 rotates to drive the tooth socket 530, so that the screwing depth of the thread of the rear lens frame 300 screwed with the tooth socket 530 changes, and automatic optical focusing of the lens is realized.
The automatic IRIS assembly 600 includes a mounting ring 610 and a P-IRIS 620, the mounting ring 610 is fixedly installed in the front frame 200, the P-IRIS 620 is installed on the mounting ring 610, and the size of the IRIS of the P-IRIS 620 can be automatically adjusted according to the amount of light passing through, so as to adjust the size of the lens light passing hole.
The housing 700 includes a base 710 and a casing 720, the base 710 is fixed to the bottom of the main barrel 100, the casing 720 is fixed in the base 710, and the auto-focusing mechanism 500 and the auto-iris assembly 600 are located in the casing 720, so as to have better waterproof and dustproof functions.
In the present specification, the term "a lens element having a positive refractive index (or a negative refractive index)" means that the paraxial refractive index of the lens element calculated by the gauss theory is positive (or negative). The term "object-side (or image-side) of a lens" is defined as the specific range of imaging light rays passing through the lens surface. The determination of the surface shape of the lens can be performed by the judgment method of a person skilled in the art, i.e., by the sign of the curvature radius (abbreviated as R value). The R value may be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in lens data sheets (lens sheets) of optical design software. When the R value is positive, the object side is judged to be a convex surface; and when the R value is negative, judging that the object side surface is a concave surface. On the contrary, regarding the image side surface, when the R value is positive, the image side surface is judged to be a concave surface; when the R value is negative, the image side surface is judged to be convex.
With reference to fig. 2 and 5, the front lens group 410 includes a first lens element 411 to a fifth lens element 415, the rear lens group 420 includes a sixth lens element 421 to a fourteenth lens element 429, the first lens element 411 to the fourteenth lens element 429 are sequentially disposed along an optical axis from an object side to an image side, and the auto stop assembly 600 is disposed between the fifth lens element 415 and the sixth lens element 421. The first lens element 411 to the fourteenth lens element 429 respectively comprise an object side surface facing the object side and allowing the imaging light to pass through and an image side surface facing the image side and allowing the imaging light to pass through;
the first lens element 411 has a positive refractive index, and the object-side surface and the image-side surface of the first lens element 411 are convex;
the second lens element 412 with negative refractive index has a convex object-side surface and a concave image-side surface;
the third lens element 413 has a negative refractive index, and the object-side surface and the image-side surface of the third lens element 413 are concave;
the fourth lens element 414 with positive refractive index has a convex object-side surface and a convex image-side surface of the fourth lens element 414;
the fifth lens element 415 has a positive refractive index, and the object-side surface and the image-side surface of the fifth lens element 415 are respectively a plane and a convex surface;
the sixth lens element 421 with positive refractive index has a convex object-side surface and a convex image-side surface;
the seventh lens element 422 with negative refractive index has a concave object-side surface and a concave image-side surface of the seventh lens element 422;
the eighth lens element 423 with positive refractive index has a convex object-side surface and a convex image-side surface;
the ninth lens element 424 with positive refractive index has a convex object-side surface and a convex image-side surface, respectively, of the ninth lens element 424;
the tenth lens element 425 has a negative refractive index, and the tenth lens element 425 has a convex object-side surface and a concave image-side surface;
the eleventh lens element 426 has a positive refractive index, and the eleventh lens element 426 has a convex object-side surface and a concave image-side surface;
the twelfth lens element 427 has a positive refractive index, and the object-side surface of the twelfth lens element 427 is planar and the image-side surface thereof is convex;
the thirteenth lens element 428 with negative refractive index has a concave object-side surface and a convex image-side surface;
the fourteenth lens element 429 has a positive refractive index, and the fourteenth lens element 429 has a convex object-side surface and a planar image-side surface.
The image-side surface of the third lens 413 is cemented to the object-side surface of the fourth lens 414, the image-side surface of the seventh lens 422 is cemented to the object-side surface of the eighth lens 423, the image-side surface of the tenth lens 425 is cemented to the object-side surface of the eleventh lens 426, and the image-side surface of the twelfth lens 427 is cemented to the object-side surface of the thirteenth lens 428.
The combination of the first lens 411 to the fifth lens 415 of the front lens group 410 guides the light reflected by the object plane as much as possible to pass through the automatic aperture stop assembly 600, thereby realizing large light transmission. After the light reaches the rear lens group 420, the sixth lens element 421 with positive focal length focuses the light passing through the front lens group 410 to correct various aberrations.
The first lens 411, the second lens 412, the third lens 413, the fourth lens 414, the fifth lens 415, the sixth lens 421, the seventh lens 422, the eighth lens 423, the ninth lens 424, the tenth lens 425, the eleventh lens 426, the twelfth lens 427, the thirteenth lens 428, and the fourteenth lens 429 are sequentially spaced apart from and supported by a spacer 430, and the first lens 411 is fixed to the front end of the front frame 200 by a pressing ring 440.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a big image plane auto focus camera lens of big light transmission which characterized in that: comprises a main cylinder, a front frame, a rear frame, a lens group and an automatic focusing mechanism;
the front mirror frame is arranged on one side of the rear mirror frame, and the rear mirror frame is accommodated in the main cylinder;
the lens group comprises a front lens group and a rear lens group, all lenses of the front lens group are separated from each other and lean against the inside of the front frame, and all lenses of the rear lens group are separated from each other and lean against the inside of the rear frame;
the automatic focusing mechanism comprises an automatic focusing assembly and an adjusting ring, the automatic focusing assembly is arranged on the side edge of the rear lens frame and is movably connected with the adjusting ring, so that the adjusting ring drives the rear lens frame to axially move back and forth relative to the main cylinder to realize automatic focusing.
2. The large-pass large-image-plane automatic focusing lens of claim 1, wherein: the automatic focusing mechanism further comprises a tooth socket, the tooth socket comprises an outer interface ring and an inner interface ring, the outer interface ring is in threaded connection with the main barrel, the inner interface ring is in threaded connection with the rear mirror frame, and the adjusting ring is sleeved on the main barrel and fixedly connected with the tooth socket.
3. The large-pass large-image-plane automatic focusing lens of claim 2, wherein: the adjustable ring includes ring body and outer ring gear, ring body and facing looks rigid coupling, center on the circumference of ring body is provided with outer ring gear, the automatic focusing subassembly is used for the drive outer ring gear is rotatory.
4. The large-pass large-image-plane automatic focusing lens of claim 3, wherein: the automatic focusing assembly comprises a connecting seat, a motor and a gear set, the connecting seat is fixedly arranged on the side edge of the main cylinder, the motor is arranged in the connecting seat, the gear set is connected with an output shaft of the motor, and the gear set is matched with the outer gear ring.
5. The large-pass large-image-plane automatic focusing lens of claim 1, wherein: the automatic IRIS diaphragm assembly comprises a mounting ring and a P-IRIS, the mounting ring is fixedly arranged in the front mirror frame, and the P-IRIS is arranged on the mounting ring and used for adjusting the size of a lens light through hole.
6. The large-pass large-image-plane automatic focusing lens of claim 5, wherein: the automatic focusing device comprises a main barrel, and is characterized by further comprising a shell, wherein the shell comprises a base and a shell, the base is fixed at the bottom of the main barrel, the shell is fixedly arranged in the base, and the automatic focusing mechanism and the automatic aperture assembly are located in the shell.
7. The large-pass large-image-plane auto-focusing lens of any one of claims 1 to 6, wherein: the front lens group comprises a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a fourteenth lens element, and an automatic aperture stop assembly.
8. The large-pass large-image-plane auto-focusing lens of claim 7, wherein: the first lens element to the fourteenth lens element respectively comprise an object side surface facing the object side and allowing the imaging light to pass and an image side surface facing the image side and allowing the imaging light to pass;
the first lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the second lens element with negative refractive index has a convex object-side surface and a concave image-side surface;
the third lens element with negative refractive index has a concave object-side surface and a concave image-side surface;
the fourth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the fifth lens element has a positive refractive index, and the object-side surface and the image-side surface of the fifth lens element are flat and convex;
the sixth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the seventh lens element with a negative refractive index has a concave object-side surface and a concave image-side surface;
the eighth lens element with a positive refractive index has a convex object-side surface and a convex image-side surface;
the ninth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;
the tenth lens element with a negative refractive index has a convex object-side surface and a concave image-side surface;
the eleventh lens element with a positive refractive index has a convex object-side surface and a concave image-side surface;
the twelfth lens element has a positive refractive index, and an object-side surface and an image-side surface of the twelfth lens element are respectively a plane and a convex surface;
the thirteenth lens element with a negative refractive index has a concave object-side surface and a convex image-side surface;
the fourteenth lens element has a positive refractive index, and an object-side surface and an image-side surface of the fourteenth lens element are convex and planar.
9. The large-pass large-image-plane automatic focusing lens of claim 8, wherein: an image-side surface of the third lens element is cemented with an object-side surface of the fourth lens element, an image-side surface of the seventh lens element is cemented with an object-side surface of the eighth lens element, an image-side surface of the tenth lens element is cemented with an object-side surface of the eleventh lens element, and an image-side surface of the twelfth lens element is cemented with an object-side surface of the thirteenth lens element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121385398.7U CN215642015U (en) | 2021-06-22 | 2021-06-22 | Large-light-transmission large-image-surface automatic focusing lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121385398.7U CN215642015U (en) | 2021-06-22 | 2021-06-22 | Large-light-transmission large-image-surface automatic focusing lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215642015U true CN215642015U (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121385398.7U Active CN215642015U (en) | 2021-06-22 | 2021-06-22 | Large-light-transmission large-image-surface automatic focusing lens |
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| Country | Link |
|---|---|
| CN (1) | CN215642015U (en) |
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2021
- 2021-06-22 CN CN202121385398.7U patent/CN215642015U/en active Active
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