CN216052384U - Infrared focusing lens - Google Patents
Infrared focusing lens Download PDFInfo
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- CN216052384U CN216052384U CN202122136273.7U CN202122136273U CN216052384U CN 216052384 U CN216052384 U CN 216052384U CN 202122136273 U CN202122136273 U CN 202122136273U CN 216052384 U CN216052384 U CN 216052384U
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Abstract
The utility model relates to an infrared thermal imager, and particularly discloses an infrared focusing lens, which comprises a main lens barrel, a lens group, a movable lens barrel, a focusing lens, a hand wheel, an inner barrel, a Hall sensor, a magnet, an inner gear, a focusing motor, a flange, a main board and an end cover. The novel LED lamp has the characteristics of simple structure, simple and convenient installation and the like, so that the batch production cost is greatly reduced, the market application prospect is wide, and the commercial value is high.
Description
Technical Field
The utility model relates to an infrared thermal imager, in particular to an infrared focusing lens.
Background
Since the nineties of the last century, the uncooled thermal infrared imagers have rapidly entered the application market, and compared with the refrigerated thermal infrared imagers, the uncooled thermal infrared imagers have the advantages of high reliability, low cost, low power consumption, light weight, miniaturization, fast start-up, convenient and flexible use, and the like. Compared with the visible light security lens, the infrared detection has certain capabilities of penetrating smoke, fog, haze, snow and the like and recognizing camouflage, is not interfered by battlefield strong light and flash light to cause blindness, can realize long-distance and all-weather observation, and is particularly suitable for target detection at night and under adverse weather conditions. Moreover, the uncooled infrared focal plane array technology has been developed from small scale to medium and large scale, the pixel is also reduced from 50 μm to 17 μm, even 12 μm, and the resolution and the sensitivity are obviously improved. Therefore, with the development of scientific technology, the infrared imaging technology has been widely applied in the fields of national defense, industry, medical treatment and the like.
In some specific security fields, the infrared lens is gradually used for night patrol, so that security reliability is improved. The existing lens has two basic types, one is a manual focusing lens, the other is an automatic focusing lens controlled by a circuit, the focusing mechanisms of the two lenses have great difference in specific structure, and aiming at the infrared focusing lens, the manual focusing is performed to a certain extent, the precision is not higher than that of electric focusing, and the electric focusing can be more accurate than the manual focusing and can realize the automatic focusing function. And the temperature not only can affect the refractive index of the optical material, but also can cause thermal expansion and cold contraction on the lens barrel material, so that the focal power change and the optimal image surface shift, the optical imaging quality is reduced, the image is blurred, the contrast is reduced, and the imaging performance of the lens is finally affected.
At present, lenses integrating manual focusing and automatic focusing are rarely seen in commercially available lenses for thermal infrared imagers.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an infrared focusing lens, and a user can select one of manual or automatic focusing modes to perform focusing operation on the lens according to needs by using the infrared focusing lens.
In order to realize the purpose of the utility model, the concrete scheme is as follows:
an infrared focusing lens of manual-automatic, comprising:
a main barrel;
a lens group disposed on the main barrel;
the movable lens barrel is attached to and sleeved on the outer wall of the movable lens barrel, and the movable lens barrel can move in the main lens barrel along the axial direction of the main lens barrel;
a focusing lens fixed in the movable lens barrel;
the outer side wall surface of the inner cylinder is provided with an outer gear; an inner gear is arranged on the inner side wall surface of the hand wheel;
the focusing motor is arranged between the main lens barrel and the hand wheel, a motor gear is arranged at the output end of the focusing motor, the motor gear is arranged between the inner gear and the outer gear, and two ends of the motor gear are respectively meshed with the inner gear and the outer gear;
the tail part of the inner cylinder protrudes to form a flange, and a magnet is arranged on the flange;
the end cover is fixed at the tail part of the main lens cone, a Hall sensor matched with the magnet is arranged on the end cover, and the Hall sensor and the magnet are arranged oppositely;
the main board is connected with the Hall sensor and the focusing motor through signal lines;
wherein: the side wall of the inner cylinder is provided with a guide groove, the guide groove is obliquely arranged relative to the circumferential plane of the main lens barrel, a movable poking nail extending outwards is fixed on the side wall of the movable lens barrel, a long notch is formed in the main lens barrel, the movable poking nail penetrates through the long notch and extends into the guide groove, and the movable poking nail can move in the axial direction of the main lens barrel in the guide groove and the long notch.
The utility model creatively arranges the Hall element on the flange, arranges the magnet matched with the Hall element on the inner cylinder, the position of the magnet can be changed due to the rotation of the inner cylinder, and the Hall element realizes the feedback of the rotating displacement by the induction of the magnetic line of force, thereby realizing the control of the motor.
Further, the main barrel includes a cylindrical portion having the same diameter and a barrel portion having a gradually increasing diameter.
Further, the moving distance of the moving lens barrel in the main lens barrel along the axial direction is not greater than the distance of the moving shifting nail in the guide groove and the long groove along the axial direction.
Furthermore, the width of the long notch along the axis direction of the main lens cone is not more than the maximum axial distance of the two ends of the guide groove on the inner cylinder along the axis direction of the main lens cone.
Further, the movable poking nail is provided with two symmetrical guide grooves, and correspondingly, the guide grooves are provided with two symmetrical guide grooves.
Further, the guide groove penetrates through the side wall of the inner cylinder.
Further, the flange is of a fan ring structure.
Furthermore, the Hall sensor comprises a Hall element and a circuit board, the circuit board is of a fan-ring structure with the size consistent with that of the flange, and the circuit board is fixed on the end cover at a position opposite to the flange.
Further, the magnet is provided with three, preferably circular magnets.
Furthermore, the end cover is connected with the tail part of the main lens cone through a bolt.
Compared with the prior art, the utility model has the beneficial effects that:
the infrared focusing lens is simple in structure and simple and convenient to mount. The automatic focusing device can realize the functions of manual focusing and automatic focusing at the same time, realizes the integration of manual focusing and automatic focusing, and well meets the requirements of users. The novel LED lamp has the characteristics of simple structure, simple and convenient installation and the like, so that the batch production cost is greatly reduced, the market application prospect is wide, and the commercial value is high.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.
Fig. 1 is a sectional structure view of an infrared focusing lens according to embodiment 1 of the present invention.
Fig. 2 is a structural diagram of an internal gear of an infrared focusing lens in embodiment 1 of the present invention.
Fig. 3 is a structural diagram of an inner cylinder of an infrared focusing lens in embodiment 1 of the present invention.
Fig. 4 is a structural diagram of a main barrel of an infrared focusing lens in embodiment 1 of the present invention.
Fig. 5 is a structural diagram of a hall sensor according to embodiment 1 of the present invention.
Fig. 6 is a perspective exploded view of an infrared focusing lens in embodiment 1 of the present invention.
Wherein: 1-a main barrel; 2-hand wheel; 3-motor gear; 4-internal gear; 5-a focusing motor; 6-inner cylinder; 7-moving the nail; 8-a Hall sensor; 9-a flange; 10-moving the lens barrel; 11-a magnet; 12-a guide groove; 13-long slot opening; 14-an outer gear; 15-end cap; 16-a Hall element; 17-a circuit board; 18-O type sealing ring.
Detailed Description
The present invention will now be described in detail with reference to the drawings, which are given by way of illustration and explanation only and should not be construed to limit the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
Example 1
The embodiment discloses a manual-automatic integrated infrared focusing lens.
Referring to fig. 1 to 6, the manual-automatic infrared focusing lens includes: a main barrel 1; a lens group disposed on the main barrel 1, the lens group in this embodiment includes two lenses; the main lens barrel 1 comprises a cylindrical part with the same diameter and a lens barrel part with the gradually increased diameter, the inner wall of the cylindrical part with the same diameter of the main lens barrel 1 is fitted and sleeved on the outer wall of the main lens barrel 10, and the main lens barrel 1 can move along the axial direction of the main lens barrel 1 by the movable lens barrel 10; a focusing lens fixed in the movable barrel 10; the hand wheel 2 and the inner cylinder 6 are sleeved on the outer wall of the main lens barrel 1, an inner gear 4 is fixedly arranged on the inner side wall surface of the hand wheel 2 along the circumferential direction, and an outer gear 14 is fixedly arranged on the outer side wall surface of the inner cylinder 6 along the circumferential direction; the focusing motor 5 is arranged between the main lens barrel 1 and the hand wheel 2, the output end of the focusing motor 5 is provided with a motor gear 3, the motor gear 3 is arranged between an inner gear 4 and an outer gear 14, and two ends of the motor gear 3 are respectively meshed with the inner gear 4 and the outer gear 14; the tail part of the inner cylinder 6 protrudes to form a flange 9 with a fan-ring structure, and 3 circular magnets 8 are uniformly arranged on the flange 9; an end cover 15 fixed at the tail part of the main lens barrel 1 through a bolt, wherein a Hall sensor 8 matched with the magnet is arranged on the end cover 15, and the Hall sensor 8 is arranged opposite to the magnet 11; the main board is connected with the Hall sensor 8 and the focusing motor 5 through signal lines, the Hall sensor 8 comprises 2 Hall elements 16 and a circuit board 17, the circuit board is of a fan-ring structure with the size consistent with that of the flange 9, and the circuit board 17 is fixed on the end cover 15 at a position opposite to the flange 9; and O-shaped sealing rings 18 are arranged in gaps between two ends of the hand wheel 2 and the main lens barrel 1 and the end cover 15.
Wherein: the side wall of the inner cylinder 6 is provided with 2 mutually symmetrical guide grooves 12 in a penetrating manner, the guide grooves 12 are obliquely arranged relative to the circumferential plane of the main lens barrel 1, 2 outwardly extending movable nails 7 are fixed on the side wall of the movable lens barrel 10, 2 corresponding long notches 13 are arranged on the main lens barrel 1, the 2 movable nails 7 penetrate through the long notches 13 and extend into the corresponding guide grooves 12, and the movable nails 7 can move in the guide grooves 12 and the long notches 13 along the axial direction of the main lens barrel 1, so that the rotary motion of the inner cylinder 6 is converted into the axial linear motion of the movable lens barrel 10.
In this embodiment, the moving distance of the moving barrel 10 in the main barrel 1 along the axial direction is not greater than the distance of the moving nail 7 in the guide groove 12 and the long notch 13, so that the width of the long notch 13 of the side wall of the main barrel 1 in the axial direction of the main barrel 1 is not less than the maximum axial distance of the two end points of the guide groove 12 on the inner cylinder 6 along the axial direction of the main barrel 1.
The manual and motorized focusing processes of the present invention are described in detail below:
manual focusing process: the user rotates hand wheel 2 along clockwise or anticlockwise direction with the hand, because motor gear 3's both ends respectively with the internal gear 4 of fixed setting on the hand wheel 2 and the outer gear 14 of the fixed setting of inner tube 6 outer wall, from this, drive inner tube 6 through rotatory hand wheel 2 and rotate together, rotatory inner tube 6 drives through the guiding groove 12 that sets up of its slope on it and moves group nail 7 and be axial motion along the axle center direction of main lens cone 1, because be equipped with the slotted hole 13 that supplies to remove group nail 7 axial motion on main lens cone 1, and move group nail 7 fixed connection on moving lens cone 10, it is axial motion to drive the focusing lens piece in moving lens cone 10 and moving lens cone 10 from this, realize manual focusing.
Electric focusing process: the focusing motor 5 is opened through mainboard control, the motor gear 3 at the output end of the focusing motor 5 rotates, the external gear 4 meshed with the motor gear 3 is driven to rotate, the internal cylinder 6 is driven to rotate together, the rotating internal cylinder 6 drives the movable poking nail 7 to axially move along the axis direction of the main lens cone 1 through the guide groove 12 obliquely arranged on the rotating internal cylinder 6, the long notch 13 for the movable poking nail 7 to axially move is arranged on the main lens cone 1, and the movable poking nail 7 is fixedly connected on the movable lens cone 10, so that the movable lens cone 10 and the focusing lens in the movable lens cone 10 are driven to axially move. Meanwhile, the position of the magnet 11 can be changed due to the rotation of the inner barrel, the Hall sensor 8 realizes the feedback of the rotation displacement through the induction of magnetic lines of force and transmits the feedback to the main board through a signal line, and the main board directly controls the rotation direction and the rotation speed of the focusing motor 5 after receiving the rotation direction signal and the frequency signal sent by the Hall sensor 8, thereby realizing the electric focusing process.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. An infrared focus lens, comprising:
a main barrel (1);
a lens group provided on the main barrel (1);
the main lens barrel (1) is sleeved on the outer wall of the movable lens barrel (10) in a fitting manner, and the movable lens barrel (10) can move in the main lens barrel (1) along the axial direction of the main lens barrel (1);
a focusing lens fixed in the movable lens barrel (10);
the hand wheel (2) and the inner cylinder (6) are sleeved on the outer wall of the main lens cone (1), and an outer gear (14) is arranged on the outer side wall surface of the inner cylinder (6); an inner gear (4) is arranged on the inner side wall surface of the hand wheel (2);
the focusing motor (5) is arranged between the main lens barrel (1) and the hand wheel (2), the output end of the focusing motor (5) is provided with a motor gear (3), the motor gear (3) is arranged between the inner gear (4) and the outer gear (14), and two ends of the motor gear (3) are respectively meshed with the inner gear (4) and the outer gear (14);
the tail of the inner cylinder (6) protrudes to form a flange (9), and a magnet (11) is arranged on the flange (9);
the end cover (15) is fixed at the tail of the main lens barrel (1), the end cover (15) is provided with a Hall sensor (8) matched with the magnet, and the Hall sensor (8) is opposite to the magnet (11);
the main board is connected with the Hall sensor (8) and the focusing motor (5) through signal lines;
wherein: the side wall of the inner cylinder (6) is provided with a guide groove (12), the guide groove (12) is obliquely arranged relative to the circumferential plane of the main lens barrel (1), an outward extending movable poking nail (7) is fixed on the side wall of the movable lens barrel (10), a long notch (13) is formed in the main lens barrel (1), the movable poking nail (7) penetrates through the long notch (13) and extends into the guide groove (12), and the movable poking nail (7) can move in the axial direction of the main lens barrel (1) in the guide groove (12) and the long notch (13).
2. An infrared focus lens according to claim 1, characterized in that the main barrel (1) comprises a cylindrical portion of the same diameter and a barrel portion of gradually increasing diameter.
3. An infrared focus lens according to claim 1, characterized in that the distance the moving barrel (10) is axially movable in the main barrel (1) is not greater than the distance the moving pick (7) is axially movable in the guide groove (12) and the elongated slot (13).
4. An infrared focusing lens according to claim 1, characterized in that the width of the long notch (13) in the axial direction of the main barrel (1) is not less than the maximum axial distance between the two ends of the guide groove (12) of the inner tube (6) in the axial direction of the main barrel (1).
5. An infrared focusing lens according to claim 1, characterized in that said moving pick-up (7) is provided with two mutually symmetrical, and correspondingly said guiding groove (12) is provided with two mutually symmetrical.
6. An infrared focusing lens according to claim 1, characterized in that the flange (9) is of a fan-ring structure.
7. The infrared focusing lens according to claim 6, wherein the Hall sensor (8) comprises a Hall element (16) and a circuit board (17), the circuit board is of a fan-ring structure with the size consistent with that of the flange (9), and the circuit board (17) is fixed on the end cover (15) at a position opposite to the flange (9).
8. An infrared focus lens as set forth in claim 1, wherein there are three of said magnets.
9. An infrared focusing lens according to claim 1, characterized in that the end cap (15) is bolted to the rear of the main barrel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122136273.7U CN216052384U (en) | 2021-09-06 | 2021-09-06 | Infrared focusing lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122136273.7U CN216052384U (en) | 2021-09-06 | 2021-09-06 | Infrared focusing lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216052384U true CN216052384U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122136273.7U Active CN216052384U (en) | 2021-09-06 | 2021-09-06 | Infrared focusing lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216052384U (en) |
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2021
- 2021-09-06 CN CN202122136273.7U patent/CN216052384U/en active Active
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