CN219758573U - Infrared lens with adjustable diaphragm - Google Patents

Abstract

The utility model provides an infrared lens with an adjustable diaphragm, which comprises a front lens barrel, a rear lens barrel, a first lens group, a second lens group, an iris diaphragm and a diameter adjusting assembly, wherein the first lens group is arranged in the front lens barrel, the second lens group is arranged in the rear lens barrel, the iris diaphragm and the diameter adjusting assembly are arranged between the front lens barrel and the rear lens barrel, and the diameter adjusting assembly is connected with a diaphragm connecting rod of the iris diaphragm. According to the utility model, the diameter-adjusting assembly and the iris diaphragm are arranged between the front lens barrel and the rear lens barrel, and the diameter-adjusting assembly is used for adjusting the caliber of the iris diaphragm so as to correspond to different temperature measurement scenes, so that the same lens can be applied to Chang Wenhe high-temperature different temperature measurement scenes, and the trouble of lens replacement is eliminated.

Description

Infrared lens with adjustable diaphragm

Technical Field

The utility model belongs to the technical field of optical lenses, and particularly relates to an infrared lens with an adjustable diaphragm.

Background

With the development of infrared technology and the improvement of market demand, the infrared temperature measuring lens is more and more in demand in military and civil markets, and the infrared technology is far higher than the visible light lens due to the influence of temperature due to the characteristics of the infrared technology. In order to meet the requirements of different temperature measurement scenes, the conventional infrared temperature measurement lens needs to be replaced by different lenses, namely, the normal temperature lens is used for measuring normal temperature scenes, and the high temperature lens is replaced by high temperature scenes, however, the lens replacement process is complicated, and the application of different temperature measurement scenes is not facilitated.

Disclosure of Invention

The utility model aims to provide an infrared lens with an adjustable diaphragm, which can at least solve part of defects in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an infrared lens with adjustable diaphragm, includes front barrel, back lens cone, first lens group, second lens group, iris and adjustment footpath subassembly, first lens group install in the front barrel, the second lens group install in the back lens cone, iris and adjustment footpath subassembly install in between front barrel and the back lens cone, just the adjustment footpath subassembly with the diaphragm connecting rod of iris is connected.

Further, the diameter-adjusting assembly comprises a sleeve which is connected with the front lens barrel in a matching way and a deflector rod which is arranged on the sleeve; the sleeve is coaxially arranged with the centers of the front lens barrel and the iris diaphragm, a notch is formed in the side wall of the front lens barrel, the deflector rod penetrates through the notch, the deflector rod can deflect along the circumferential direction of the front lens barrel in the notch, and a connecting rod used for being connected with a diaphragm connecting rod of the iris diaphragm is arranged on the deflector rod.

Further, the middle of the front lens cone is provided with a cylindrical barrel body, the sleeve is sleeved on the outer side of the cylindrical barrel body of the front lens cone, the inner side wall of the sleeve is provided with a positioning groove, and the outer side wall of the cylindrical barrel body of the front lens cone is provided with a positioning spring column matched with the positioning groove.

Furthermore, the positioning grooves are symmetrically arranged on two sides of the deflector rod.

Further, a position detection plate is arranged at the bottom of the iris diaphragm, an optocoupler switch is arranged on the position detection plate, a baffle capable of shielding the optocoupler switch is arranged at the bottom of the sleeve, a circuit interface is arranged on the rear lens barrel, and the optocoupler switch is electrically connected with the circuit interface.

Further, the position detection plate is provided with a clamping groove in a shape of a gamma, and a limiting block is arranged in the front lens barrel and is matched with the clamping groove in a shape of a gamma.

Further, an arc limiting plate is arranged at the position of the corresponding notch in the front lens barrel, the arc limiting plate is arranged in parallel with the side wall of the front lens barrel, a groove for circumferential deflection of the deflector rod is formed in the arc limiting plate, the deflector rod is of a T-shaped structure, the horizontal section of the deflector rod is of an arc shape parallel to the side wall of the front lens barrel, and the horizontal section of the deflector rod is arranged between the side wall of the front lens barrel and the arc limiting plate in a limiting mode.

Further, the upper surface of the horizontal section of the deflector rod is provided with a convex block.

Further, the infrared lens with the adjustable diaphragm further comprises a pressing ring, wherein the pressing ring is installed in the front lens barrel and is in pressure connection with the front end of the first lens group.

Further, a hollow stud is arranged in the front lens barrel and is fixedly connected with the rear lens barrel.

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

(1) The infrared lens with the adjustable diaphragm is provided with the diameter adjusting component and the adjustable diaphragm, and the diameter of the adjustable diaphragm is adjusted by the diameter adjusting component so as to correspond to different temperature measuring scenes, so that the same lens can be applied to Chang Wenhe high-temperature different temperature measuring scenes, and the trouble of lens replacement is avoided.

(2) The positioning groove is designed in the diameter adjusting component of the infrared lens with the adjustable diaphragm, so that the aperture of the adjustable diaphragm is automatically locked after being manually switched in place, the stability of the aperture of the adjustable diaphragm is ensured, and meanwhile, the deflection angle of the deflector rod of the diameter adjusting component is detected by the design of the optical coupler switch, so that the precision of the aperture adjustment of the adjustable diaphragm is ensured.

The present utility model will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is an exploded view of an infrared lens with an adjustable diaphragm of the present utility model;

FIG. 2 is a cross-sectional view of an infrared lens having an adjustable stop of the present utility model;

fig. 3 is a schematic structural view of an iris in an infrared lens with an adjustable diaphragm according to the present utility model.

Reference numerals illustrate: 1. a pressing ring; 2. a front barrel; 3. an arc limiting plate; 4. a notch; 5. a cylindrical barrel; 6. a bump; 7. a deflector rod; 8. a connecting rod; 9. positioning a spring column; 10. a diaphragm connecting rod; 11. an iris diaphragm; 12. a first lens group; 13. a second lens group; 14. a rear barrel; 15. a position detection plate; 16. an optocoupler switch; 17. a shape clamping groove; 18. a sleeve; 19. a hollow stud; 20. a baffle; 21. a circuit interface; 22. and a limiting block.

Detailed Description

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

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or by an abutting connection or integrally connected; the specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

As shown in fig. 1 and 2, the present embodiment provides an infrared lens with an adjustable diaphragm, which includes a front lens barrel 2, a rear lens barrel 14, a first lens group 12, a second lens group 13, an iris diaphragm 11, and a diameter adjusting assembly, wherein the first lens group 12 is installed in the front lens barrel 2, the second lens group 13 is installed in the rear lens barrel 14, the iris diaphragm 11 and the diameter adjusting assembly are installed between the front lens barrel 2 and the rear lens barrel 14, and the diameter adjusting assembly is connected with a diaphragm connecting rod 10 of the iris diaphragm 11. In this embodiment, the aperture adjusting assembly drives the aperture connecting rod 10 of the iris aperture 11 to rotate, so as to adjust the aperture of the aperture, and for different apertures, different application scenes are realized through different energies of the optical system, that is, the large aperture corresponds to the temperature measurement application of the normal temperature scene, and the small aperture corresponds to the temperature measurement application of the high temperature scene. The infrared lens with the adjustable diaphragm provided by the embodiment realizes that the same lens is applied to Chang Wenhe high-temperature different temperature measuring scenes by arranging the diameter adjusting assembly and the adjustable diaphragm 11, and omits the complicated process of changing the lens for different temperature measuring scenes.

In a refined embodiment, the infrared lens with the adjustable diaphragm of the present embodiment further includes a pressing ring 1, the pressing ring 1 is installed in the front lens barrel 2, the pressing ring 1 is pressed against the front end of the first lens group 12, and the first lens group 12 is fixed between the pressing ring 1 and the adjustable diaphragm 11. The front lens cone 2 is internally provided with a hollow stud 19, the rear lens cone 14 is provided with a screw hole corresponding to the hollow stud 19, and the front lens cone 2 is fixedly connected with the rear lens cone 14 by adopting a screw.

For one specific embodiment of adjusting the aperture of the iris diaphragm by using the diameter adjusting assembly, as shown in fig. 1 and 2, the diameter adjusting assembly comprises a sleeve 18 in fit connection with the front lens barrel 2, and a deflector rod 7 arranged on the sleeve 18; the sleeve 18 is coaxially arranged with the centers of the front lens barrel 2 and the iris diaphragm 11, a notch 4 is formed in the side wall of the front lens barrel 2, the deflector rod 7 penetrates through the notch 4, the deflector rod 7 can deflect along the circumferential direction of the front lens barrel 2 in the notch 4, and a connecting rod 8 used for being connected with the diaphragm connecting rod 10 of the iris diaphragm 11 is arranged on the deflector rod 7. When the manual stirring rod 7 rotates in the notch 4, the stirring rod 7 drives the sleeve 18 to rotate, and meanwhile, the diaphragm connecting rod 10 of the iris diaphragm 11 synchronously rotates, and the aperture of the iris diaphragm changes accordingly, so that the purpose of adjusting the aperture of the diaphragm is achieved. The structure of the iris diaphragm 11 adopted in this embodiment is shown in fig. 3, and the rotation of the diaphragm connecting rod 10 can drive the movable ends of the diaphragm sheets arranged at intervals in the spiral circumferential direction in the iris diaphragm 11 to rotate, so as to change the caliber of the iris diaphragm.

In a preferred embodiment, the middle of the front lens barrel 2 is provided with a cylindrical barrel 5, the first lens group 12 is installed inside the cylindrical barrel 5 of the front lens barrel 2, a sleeve 18 of the diameter adjusting assembly is sleeved on the outer side of the cylindrical barrel 5 of the front lens barrel 2, a positioning groove is formed in the inner side wall of the sleeve 18, a positioning spring column 9 matched with the positioning groove is arranged on the outer side wall of the cylindrical barrel 5 of the front lens barrel 2, when the deflector 7 drives the sleeve 18 to rotate for a certain angle, the positioning spring column 9 falls into the positioning groove, the sleeve 18 is automatically locked, the sleeve 18 cannot rotate at will, and then the aperture of the iris diaphragm cannot change at will after reaching a preset size, so that the stability of the aperture of the diaphragm is ensured. Furthermore, the positioning grooves are symmetrically arranged on two sides of the deflector rod 7, and the positioning spring columns 9 on two corresponding sides are symmetrically distributed, so that the positioning spring columns 9 make the force on two sides uniform, and the pressure between the sleeve 18 of the diameter-adjusting assembly and the front lens barrel 2 is ensured to be uniform.

In a preferred embodiment, a position detection plate 15 is arranged at the bottom of the iris diaphragm 11, an optocoupler switch 16 is arranged on the position detection plate 15, a baffle 20 is arranged at the bottom of the sleeve 18, in an initial state, the baffle 20 is positioned outside the optocoupler switch 16, the optocoupler switch 16 is not shielded, when the deflector 7 drives the sleeve 18 to rotate, the baffle 20 at the bottom of the sleeve 18 synchronously rotates along with the sleeve, the baffle 20 passes through the optocoupler switch 16 on the position detection plate 15 in the rotating process, so that the optocoupler switch 16 is shielded, a circuit interface 21 is arranged on the rear lens barrel 14, and the optocoupler switch 16 is electrically connected with the circuit interface 21; when the deflector rod 7 rotates, the diaphragm connecting rod 10 is driven to rotate, the aperture of the diaphragm changes along with the rotation, after the aperture reaches a preset position, the positioning spring column 9 falls in a positioning groove of the sleeve 18, meanwhile, the baffle 20 shields an optocoupler switch 16 at one end on the position detection plate 15, an electric signal is given, and the electric signal is notified to a host through a circuit interface 21 of the rear lens barrel 14, so that deflection angle detection of the deflector rod 7 of the aperture adjusting assembly is realized, and the precision of aperture adjustment of the iris diaphragm is ensured.

Further, the position detecting plate 15 has a transverse clamping groove 17, and a limiting block 22 is arranged in the front lens barrel 2, and the limiting block 22 is matched with the transverse clamping groove 17, so that the iris diaphragm 11 and the front lens barrel 2 are limited and fixed, and the assembly efficiency and the assembly precision of the infrared lens are improved. Preferably, the vertical section of the front-side clamping groove 17 is designed into an arc-shaped plate, and the bottom of the front-side clamping groove 17 is attached to the inner side wall of the front lens barrel 2, so that the mounting stability of the position detection plate 15 is ensured.

In the preferred embodiment, the arc limiting plate 3 is arranged at the position corresponding to the notch 4 in the front lens barrel 2, the arc limiting plate 3 is arranged in parallel with the side wall of the front lens barrel 2, the arc limiting plate 3 is provided with a groove for the deflector rod 7 to deflect circumferentially, the deflector rod 7 is of a T-shaped structure, the horizontal section of the deflector rod 7 is of an arc structure parallel to the side wall of the front lens barrel 2, the horizontal section of the deflector rod 7 is arranged between the side wall of the front lens barrel 2 and the arc limiting plate 3 in a limiting manner, and the deflector rod 7 is limited by the side wall of the front lens barrel 2 and the arc limiting plate 3, so that the deflector rod 7 can deflect circumferentially only without generating up-down displacement, and the aperture adjusting stability of a diaphragm is further ensured. In order to facilitate manual stirring of the shift lever 7, a bump 6 may be provided on the upper surface of the horizontal section of the shift lever 7.

In summary, the infrared lens with the adjustable diaphragm provided by the embodiment is provided with the diameter adjusting component and the adjustable diaphragm, and the diameter of the adjustable diaphragm is adjusted by the diameter adjusting component so as to correspond to different temperature measurement scenes, so that the same lens can be applied to Chang Wenhe high-temperature different temperature measurement scenes, and the trouble of lens replacement is eliminated; and the diameter adjusting assembly structure is specifically designed, so that the aperture of the iris diaphragm is automatically locked after being manually switched in place, the stability of the aperture of the iris diaphragm is ensured, and meanwhile, the deflection angle of the deflector rod of the diameter adjusting assembly is detected by the optical coupler switch, so that the aperture adjusting precision of the iris diaphragm is ensured.

The foregoing examples are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model, and all designs that are the same or similar to the present utility model are within the scope of the present utility model.

Claims (10)

1. An infrared lens with adjustable diaphragm, its characterized in that: the lens system comprises a front lens cone, a rear lens cone, a first lens group, a second lens group, an iris diaphragm and an aperture adjusting component, wherein the first lens group is installed in the front lens cone, the second lens group is installed in the rear lens cone, the iris diaphragm and the aperture adjusting component are installed between the front lens cone and the rear lens cone, and the aperture adjusting component is connected with a diaphragm connecting rod of the iris diaphragm.

2. The infrared lens with adjustable diaphragm of claim 1, wherein: the diameter-adjusting assembly comprises a sleeve which is matched and connected with the front lens barrel and a deflector rod which is arranged on the sleeve; the sleeve is coaxially arranged with the centers of the front lens barrel and the iris diaphragm, a notch is formed in the side wall of the front lens barrel, the deflector rod penetrates through the notch, the deflector rod can deflect along the circumferential direction of the front lens barrel in the notch, and a connecting rod used for being connected with a diaphragm connecting rod of the iris diaphragm is arranged on the deflector rod.

3. The infrared lens with adjustable diaphragm of claim 2, wherein: the middle of the front lens cone is provided with a cylindrical barrel body, the sleeve is sleeved on the outer side of the cylindrical barrel body of the front lens cone, the inner side wall of the sleeve is provided with a positioning groove, and the outer side wall of the cylindrical barrel body of the front lens cone is provided with a positioning spring column matched with the positioning groove.

4. An infrared lens with adjustable aperture as defined in claim 3, wherein: the positioning grooves are symmetrically arranged on two sides of the deflector rod.

5. An infrared lens with adjustable aperture as claimed in claim 2 or 3 or 4, wherein: the iris diaphragm bottom is equipped with the position pickup plate, be equipped with the opto-coupler switch on the position pickup plate, the sleeve bottom is equipped with the separation blade that can shelter from the opto-coupler switch, be equipped with the circuit interface on the back lens cone, the opto-coupler switch with the circuit interface electricity is connected.

6. The infrared lens with adjustable diaphragm of claim 5, wherein: the position detection plate is provided with a front-shaped clamping groove, and a limiting block is arranged in the front lens barrel and is matched with the front-shaped clamping groove.

7. The infrared lens with adjustable diaphragm of claim 2, wherein: the utility model discloses a front lens cone, including front lens cone, driving lever, arc limiting plate, recess, T type structure, the horizontal segment of driving lever, just the horizontal segment spacing of driving lever is installed between front lens cone lateral wall and arc limiting plate, be equipped with the arc limiting plate in the notch position department that corresponds in the front lens cone, arc limiting plate and front lens cone's lateral wall parallel arrangement, have on the arc limiting plate and supply driving lever circumference deflection's recess, the driving lever is T type structure, the horizontal segment of driving lever is the arc parallel with front lens cone lateral wall, just the horizontal segment spacing of driving lever is installed between front lens cone lateral wall and arc limiting plate.

8. The infrared lens with adjustable diaphragm of claim 7, wherein: the upper surface of the horizontal section of the deflector rod is provided with a convex block.

9. The infrared lens with adjustable diaphragm of claim 1, wherein: the lens assembly further comprises a pressing ring, wherein the pressing ring is installed in the front lens barrel and is in pressure connection with the front end of the first lens group.

10. The infrared lens with adjustable diaphragm of claim 1, wherein: the front lens barrel is internally provided with a hollow stud which is fixedly connected with the rear lens barrel.