The thermal infrared imager Built-in lens
Technical field
The utility model relates to a kind of Built-in lens that is applicable on the thermal infrared imager.
Background technology
The image-forming principle of Built-in lens that uses on the thermal infrared imager and common optical lens, be that principle of work is identical, all follow lens image formation rule: 1/u+1/v=1/f.The focal length of common optical lens is generally fixing, also can manual shift, usually do not possess the Power focus function, can not further change the size of field angle, and its weight, volume are all bigger, manual adjustment focal length both inconvenience is also inaccurate, also be not easy sealing, so just overall performance and the physical dimension to thermal imaging system causes adverse effect, thermal infrared imager day by day accurately, today of convenient and miniaturization, common optical lens can not satisfy its installation and request for utilization.
Summary of the invention
The purpose of this utility model is to provide a kind of thermal infrared imager Built-in lens that can overcome the defective that exists in the prior art, it adopts non-spherical lens, camera lens is built-in, and set up the Power focus function, add the expansion camera lens that changes the field angle size, make the volume and weight of camera lens greatly reduce, advantages of compact and light structure is operated also convenient.
The purpose of this utility model is achieved in that a kind of thermal infrared imager Built-in lens, comprises the microscope base 21, first lens 15, second lens 11, the 3rd lens 10 that are arranged in the thermal imaging system movement; Wherein: described thermal infrared imager Built-in lens also includes motor 31, described first and second lens 15,11 are installed in the object lens frame 12, fixedly connected between described object lens frame 12 and the described microscope base 21 and suitable distance at interval, described the 3rd lens 10 are installed in the focusing picture frame 8 that also can move vertically between described microscope base 21 and object lens frame 12, the 3rd lens 10 are on the same central axis with described first and second lens 15,11, and described motor 31 passes through
Motor cabinet 35 is fixedly mounted on the described microscope base 21, and links to each other with described focusing picture frame 8 by gearing.
Thermal infrared imager Built-in lens of the present utility model, because it adopts miniature motor to drive corresponding gearing, realize the automatic focusing purpose by the focal length that changes camera lens successively, thus the problem such as not convenient and inaccurate of having avoided that traditional manual focusing mode brings.And owing to needn't focus with manual manipulation again, aspheric imaging lens can be built in the movement, can seal easily, has improved the image quality and the apparent size of thermal imaging system effectively, simultaneously, the volume and weight of camera lens and thermal imaging system has also reduced greatly.And the built-in mode of camera lens is provided convenience for the size that further changes field angle again, can adopt the method that adds the expansion camera lens further to change its field angle size easily.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the A-A view of Fig. 1.
Fig. 3 is the B-B view of Fig. 1.
Fig. 4 is the C-C view of Fig. 1.
Fig. 5 is the D-D view of Fig. 1.
The figure acceptance of the bid is kept the score and is not: focusing screw mandrel 1, focusing connects part 2, stage clip 3, light shield 4, beam monitor 5, screw 6, movable light hurdle 7, focusing picture frame 8, trim ring 9, the 3rd lens 10, second lens 11, object lens frame 12, object lens trim ring 13, case ring 14, first lens 15, screw 16, guide pillar 17, screw 18, plate wheel 19, electric machine support 20, microscope base 21, locating piece 22, pin 23, driving lever spring 24, screw 25-28, blank screen 29, collets 30, motor 31, support 32, screw 33,34, motor cabinet 35, screw 36, motor 37, connecting rod 38, pin 39, screw 40,41, swivel base 42, extension spring 43, screw 44-47, axle 48, packing ring 49, screw 50.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
See also accompanying drawing 1-5, thermal infrared imager Built-in lens of the present utility model comprises the microscope base 21 that is arranged in the thermal imaging system movement, beam monitor 5, first lens 15, second lens 11 and the 3rd lens 10, wherein, described beam monitor 5 is installed in the microscope base 21, described first, two lens 15,11 are installed in the object lens frame 12 and by object lens trim ring 13 and compress mutually, fixedly connected between described object lens frame 12 and the described microscope base 21 and suitable distance at interval, described the 3rd lens 10 are installed in the focusing picture frame 8 between described beam monitor 5 and object lens frame 12 and by trim ring 9 and compress, the 3rd lens 10 and described beam monitor 5 and first, two lens 15,11 are on the same central axis, motor 31 is fixedly mounted on the described microscope base 21 by motor cabinet 35, and pass through by focusing screw mandrel 1, focusing connects part 2 and links to each other with described focusing picture frame 8 with the gearing that stage clip 3 is formed, and described focusing picture frame 8 can move in the scope between described beam monitor 5 and the object lens frame 12 vertically.
The outside surface of described focusing screw mandrel 1 is a threaded rod, it is fixedly installed on the active rotation axle of described motor 31, the end that described focusing connects part 2 links to each other with this focusing screw mandrel 1 by the threaded hole that is provided with on it, this focusing even other end of part 2 is fixedlyed connected with described focusing picture frame 8 by screw 33, this end that closes on described focusing picture frame 8 in this focusing even part 2 also is provided with a pressing plate, and described stage clip 3 is placed between this pressing plate and the microscope base 21.
One side of closing on described focusing picture frame 8 on described microscope base 21 is equipped with light shield 4, it and described microscope base 21 cooperatively interact, with described beam monitor 5 parcels wherein, also be provided with movable light hurdle 7 in the outside of described light shield 4, this activity light hurdle 7 is connected with microscope base 21 by screw 6, in addition, between this activity light hurdle 7 and described focusing picture frame 8, also be provided with blank screen 29.
Be fixed together by screw 36 between described motor 31 and the described motor cabinet 35, case ring 14 also be installed in the outermost end of described object lens trim ring 13.
When focusing operation, actuating motor 31, drive with the coaxial focusing screw mandrel 1 of this motor 31 and rotate in position, described focusing connects 2 of parts and can move vertically by threaded engagement, like this, focusing picture frame 8 that links together with this focusing screw mandrel 1 and the 3rd lens 10 will produce displacement forward or backward thereupon, with be installed in first in the object lens frame 12, two lens 15, form relative motion between 11, until reaching best focusing effect, after shooting finishes, close motor 31, described focusing connects 2 of parts can be because of homing under the elastic force effect of stage clip 3, and drives together return of focusing picture frame 8 and the 3rd lens 10.
Because the above-mentioned assembly of camera lens that comprises all is arranged in the movement of thermal imaging system, provide convenience for the size that further changes field angle again, can adopt the suitable location of camera lens this movement outside to set up the method for expanding camera lens easily and further change its field angle size.