CN104849834A - Medium-wave infrared continuous zooming camera shot and control method thereof - Google Patents
Medium-wave infrared continuous zooming camera shot and control method thereof Download PDFInfo
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- CN104849834A CN104849834A CN201510295914.XA CN201510295914A CN104849834A CN 104849834 A CN104849834 A CN 104849834A CN 201510295914 A CN201510295914 A CN 201510295914A CN 104849834 A CN104849834 A CN 104849834A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
Abstract
The invention relates to a medium-wave infrared continuous zooming camera shot and a control method thereof. The mechanical structure of the camera shot comprises a zooming assembly, a focusing assembly and a detector assembly which are installed on and connected to a connecting bottom plate sequentially from left to right. The zooming assembly comprises a front fixed lens A, a variable-magnification lens B, a compensation lens C, a rear fixed lens D, and a zooming mechanism. The focusing assembly comprises a secondary imaging lens group E and a focusing mechanism. The detector assembly comprises a baffle switching mechanism, a detector and a detector frame. In the optical system of the lens, the front fixed lens A, the variable-magnification lens B, the compensation lens C, the rear fixed lens D and the secondary imaging lens group E are arranged sequentially from left to right along the incident direction. The invention provides a medium-wave infrared continuous zooming camera shot which has the advantages of high imaging quality, high spatial resolution, small size, light weight, and vibration and impact resistance.
Description
Technical field
The present invention relates to a kind of medium wave infrared continuous zoom lens for document recording and tracking and control method thereof, belong to camera lens field.
Background technology
Infrared optical system can detect, locate the infrared radiation of also tracking target object, and by means such as opto-electronic conversion, signal transacting, image procossing, converts the infrared radiation distribution image of target object to visible light video image.The wave band that conventional infrared lens covers has medium wave 3-5 μm and long wave 8-12 μm.The selectable material of infrared band is less, and medium wave 3 ~ 5 μm of common used materials have silicon, germanium, zinc selenide, zinc sulphide and chalcogenide glass etc.; A long wave 8-12 μm common used material has germanium, zinc selenide, zinc sulphide and chalcogenide glass etc.
General infrared varifocal imaging optical system is divided into continuous vari-focus and determine shelves zoom two kinds, and determining shelves zoom is main mainly with two grades or third gear zoom again.Although two grades or third gear varifocal optical system structure are simply easy to realize, in handoff procedure, likely cause objective fuzzy or loss.And infrared continuous zooming optical system can continuously change system focal length within the specific limits, while change visual field, image planes are stablized clear, the problem of track rejection can not be there is, so first target can be searched for by Large visual angle, after switch to small field of view, accurate observation target, its application demand strengthens day by day, mainly comprises forward sight investigation, sighting system, acquisition and tracking system and civilian safety-protection system etc.
Therefore, developing 54 ~ 172mm medium wave continuous magnification lens is research purpose of the present invention.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, namely the technical problem to be solved in the present invention is to provide a kind of medium wave infrared continuous zoom lens and control method thereof, and this camera lens has the performance of high imaging quality, high spatial resolution, volume little, lightweight and vibration resistance and impact.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: a kind of medium wave infrared continuous zoom lens, the physical construction of described camera lens comprises variable focus package, focus pack and the detector assembly installing successively from left to right and be connected on connecting bottom board, described variable focus package comprises front fixed lens A, Zoom lens B, offset lens C, rear fixed lens D and zoom mechanism, described focus pack comprises secondary imaging lens combination E and focusing, and described detector assembly comprises baffle plate switching mechanism and detector and detector carriage; In the optical system of described camera lens, along light from left to right incident direction be provided with front fixed lens A, Zoom lens B, offset lens C, rear fixed lens D, secondary imaging lens combination E successively, described secondary imaging lens combination E is provided with positive lens E-1, negative lens E-2 and positive lens E-3 successively, described fixed lens A and offset lens C is positive lens, and described Zoom lens B and rear fixed lens D is negative lens.
Further, the airspace between described front fixed lens A and Zoom lens B is 23.9 ~ 36.4mm; Airspace between Zoom lens B and offset lens C is 5 ~ 27.7mm; Airspace between offset lens C and rear fixed lens D is 10 ~ 20.4mm; Airspace between rear fixed lens D and secondary imaging lens combination E is 74.5mm.
Further, the airspace between described positive lens E-1 and negative lens E-2 is 2mm; Airspace between negative lens E-2 and positive lens E-3 is 17.6mm.
Further, described zoom mechanism is provided with a precision resistor, and putting in place of described zoom mechanism, focusing and baffle plate switching mechanism controls to adopt microswitch spacing.
Further, described zoom mechanism comprises primary mirror seat, zoom assembly and compensation assembly is provided with in described primary mirror seat, before described, fixing group lens A is installed on the front end of primary mirror seat and is fixed and clamped by A sheet trim ring, described zoom group lens B is arranged in zoom assembly, described offset lens C is arranged in compensation assembly, described zoom assembly and compensation assembly to be arranged on guide rod and to be slidably matched, guide rod is fixed in primary mirror seat by guide rod pressing plate, described primary mirror seat is outside equipped with cam, described cam to be placed on primary mirror seat by steel ball and to compress with cam trim ring, form rolling bearing structure, described cam is provided with zoom curved groove and compensated curve groove, zoom curved groove is connected with compensation assembly with zoom assembly respectively by cam guide pin with compensated curve groove, described rear fixing group of lens D is placed in D sheet microscope base and is compressed by D sheet trim ring, described D sheet microscope base by screw attachment at primary mirror base rear end, described D sheet microscope base is externally connected with zoom motor rack and zoom switch frame, described zoom switch frame is provided with zoom motor and zoom potentiometer, described zoom switch frame is provided with two zoom microswitches.
Further, described focusing comprises rear microscope base, focusing guide pin, focusing ring, focusing component is provided with in described rear microscope base, described positive lens E-1 and negative lens E-2 is arranged in focusing component, described rear microscope base offers precision machined two 180 ° uniform straight troughs, described focusing ring offers precision machined 2 180 ° uniform linear skewed slots, described focusing guide pin and straight trough and linear skewed slot are slidably matched, described focusing guide pin is connected with focusing component, described focusing ring is arranged on rear microscope base by focusing ring trim ring, described positive lens E-3 to be arranged on E-3 sheet microscope base and to be compressed by E-3 sheet trim ring, described E-3 sheet microscope base is connected with rear microscope base by screw thread, described rear microscope base is externally connected with focusing motor rack and focusing switch frame, described focusing motor rack is provided with focusing motor, described focusing switch frame is provided with two focusing microswitches.
Further, described baffle plate switching mechanism comprises baffle plate, described baffle plate is fixed on apron block by baffle plate pinning, apron block lid is covered with outside described baffle plate, described baffle plate flap is fixed by screws on apron block, described detector is fixed in detector carriage by detector bracing frame and detector supporting plate, described detector carriage is fixed on apron block by screw, described apron block is connected with baffle plate motor by baffle plate motor rack, and described overhead gage both sides are all connected with baffle plate microswitch by barrier switch frame.
A kind of control method of medium wave infrared continuous zoom lens: rotated by zoom driven by motor cam, the rotary motion of cam is converted to moving axially of zoom assembly and compensation assembly by cam guide pin again, realize the consecutive variations of lens focus, complete zooming procedure; Rotated by focusing driven by motor focusing ring, by focusing guide pin, the rotary motion of focusing ring is converted to moving axially of focusing component, realizes the focusing of camera lens; Rotated by baffle plate driven by motor baffle plate, carry out baffle plate switching, realize the correction of detector.
Compared with prior art, the present invention has following beneficial effect: (1) in optical texture, the focal power that reasonable distribution is respectively organized; In zoom group B, compensating group C and secondary imaging group E, adopt three Aspherical corrector aberrations altogether, make that camera lens reaches high imaging quality, compact conformation, zoom compensate the advantages such as stroke is short; (2) in optical design, realize temperature compensation and far and near distance compensation by E-1 and the E-2 movement simultaneously in rear secondary imaging group, ensure the request for utilization of camera lens under high temperature and low temperature environment; (3) in optical design, by optimizing and revising the cold emission picture of system, make mirror-reflection " ghost image " and cold emission " blackspot " away from detector image planes; (4) there is the functions such as electric continuous zooming heat, Power focus, detector correction mechanism and focal length be preset, the robotization controlled can be realized, under the prerequisite ensureing compact conformation, take series of measures, improve the ability of camera lens vibration resistance, impact;
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Accompanying drawing explanation
Fig. 1 is optical system schematic diagram of the present invention;
Fig. 2 is camera lens physical construction schematic diagram of the present invention;
Fig. 3 is the structural perspective of camera lens of the present invention;
Fig. 4 is the variable focus package structural representation of camera lens of the present invention;
Fig. 5 is the cut-open view of Fig. 4;
Fig. 6 is the focus pack structural representation of camera lens of the present invention;
Fig. 7 is the cut-open view of Fig. 6;
Fig. 8 is the detector assembly structural representation of camera lens of the present invention.
In figure:
1-connecting bottom board, 2-variable focus package, 2-1. fixed lens A, 2-2.A sheet trim ring, 2-3. primary mirror seat, 2-4. guide rod pressing plate, the clamp ring of 2-5. zoom, 2-6. zoom trim ring, 2-7. zoom microscope base, 2-8. zoom guide pin bushing, 2-9. compensates guide pin bushing, 2-10. cam guide pin, 2-11. compensation microscope base, 2-12. compensation trim ring, 2-13. connection-bridge circle, 2-14. zoom gear, 2-15. zoom motor, 2-16. zoom motor rack, 2-17.D sheet microscope base, 2-18.D sheet trim ring, fixed lens D after 2-19., 2-20. offset lens C, 2-21. compensation Mobile base, 2-22. cam trim ring, 2-23. steel ball, 2-24. cam, 2-25. guide rod, 2-26. zoom Mobile base, 2-27. Zoom lens B, 2-28. zoom shifting block, 2-29. zoom microswitch, 2-30. zoom switch frame, 2-31. zoom potentiometer, 3-focus pack, microscope base after 3-1., 3-2. positive lens E-1, 3-3. negative lens E-2, 3-4. focusing ring, 3-5. focuses guide pin, 3-6. focusing mount I, 3-7. focusing ring trim ring, 3-8. focusing mount II, 3-9. E-3 sheet microscope base, 3-10. E-3 sheet trim ring, 3-11. positive lens E-3, 3-12. focuses trim ring II, 3-13. focuses trim ring I, 3-14. focusing spacer ring, 3-15. focusing motor rack, 3-16. focusing motor, 3-17. focusing switch frame, 3-18. focusing microswitch, 3-19. focusing shifting block, 4-detector assembly, 4-1. baffle plate flap, 4-2. apron block, 4-3. baffle plate motor rack, 4-4. baffle plate motor, 4-5. detector bracing frame I, 4-6. detector, 4-7. detector bracket, 4-8. detector supporting plate, 4-9. detector carriage, 4-10. detector bracing frame II, 4-11. baffle plate pinning, 4-12. baffle plate, 4-13. baffle plate microswitch, 4-14. barrier switch frame.
Embodiment
As shown in figures 1-8, a kind of medium wave infrared continuous zoom lens, the physical construction of described camera lens comprises variable focus package, focus pack and the detector assembly installing successively from left to right and be connected on connecting bottom board, described variable focus package comprises front fixed lens A, Zoom lens B, offset lens C, rear fixed lens D and zoom mechanism, described focus pack comprises secondary imaging lens combination E and focusing, and described detector assembly comprises baffle plate switching mechanism and detector and detector carriage; In the optical system of described camera lens, along light from left to right incident direction be provided with front fixed lens A, Zoom lens B, offset lens C, rear fixed lens D, secondary imaging lens combination E successively, described secondary imaging lens combination E is provided with positive lens E-1, negative lens E-2 and positive lens E-3 successively, described fixed lens A and offset lens C is positive lens, and described Zoom lens B and rear fixed lens D is negative lens.
In the present embodiment, the airspace between described front fixed lens A and Zoom lens B is 23.9 ~ 36.4mm; Airspace between Zoom lens B and offset lens C is 5 ~ 27.7mm; Airspace between offset lens C and rear fixed lens D is 10 ~ 20.4mm; Airspace between rear fixed lens D and secondary imaging lens combination E is 74.5mm.
In the present embodiment, the airspace between described positive lens E-1 and negative lens E-2 is 2mm; Airspace between negative lens E-2 and positive lens E-3 is 17.6mm.
In the present embodiment, described zoom mechanism is provided with a precision resistor, and putting in place of described zoom mechanism, focusing and baffle plate switching mechanism controls to adopt microswitch spacing.
In the present embodiment, described zoom mechanism comprises primary mirror seat, zoom assembly and compensation assembly is provided with in described primary mirror seat, described zoom group lens B and zoom trim ring, zoom microscope base, zoom retainer, zoom Mobile base, zoom guide pin bushing is assembled into zoom assembly, described offset lens C and compensation trim ring, compensate microscope base, compensate Mobile base, compensate guide pin bushing and be assembled into compensation assembly, before described, fixing group lens A is installed on the front end of primary mirror seat and is fixed and clamped by A sheet trim ring, described zoom group lens B is arranged in zoom assembly, described offset lens C is arranged in compensation assembly, described zoom assembly and compensation assembly to be arranged on guide rod and to be slidably matched, guide rod is fixed in primary mirror seat by guide rod pressing plate, described primary mirror seat is outside equipped with cam, described cam to be placed on primary mirror seat by steel ball and to compress with cam trim ring, form rolling bearing structure, described cam is provided with zoom curved groove and compensated curve groove, zoom curved groove is connected with compensation assembly with zoom assembly respectively by cam guide pin with compensated curve groove, described rear fixing group of lens D is placed in D sheet microscope base and is compressed by D sheet trim ring, described D sheet microscope base by screw attachment at primary mirror base rear end, described D sheet microscope base is externally connected with zoom motor rack and zoom switch frame, described zoom switch frame is provided with zoom motor and zoom potentiometer, described zoom switch frame is provided with two zoom microswitches.When the rotor rotational movement of zoom motor, rotated by zoom gear and connection-bridge astragal moving cam, the rotary motion of cam is converted to moving axially of zoom assembly and compensation assembly by cam guide pin again, thus realizes the consecutive variations of lens focus, complete zooming procedure.Meanwhile, described zoom driven by motor zoom potentiometer rotates, thus the resistance of zoom potentiometer is changed, and thus, forms man-to-man relation between focal length and zoom potentiometer resistance, can be realized the preparatory function of focal length by this approach sensor.
In the present embodiment, described focusing comprises rear microscope base, focusing guide pin, focusing ring, focusing component is provided with in described rear microscope base, described positive lens E-1 and negative lens E-2, focusing spacer ring 5-14, focusing trim ring I 5-13, focusing trim ring II 5-12, focusing mount I 5-6, focusing mount II 5-8 is assembled into focusing component, described positive lens E-1 and negative lens E-2 is arranged in focusing component, described rear microscope base offers precision machined two 180 ° uniform straight troughs, described focusing ring offers precision machined 2 180 ° uniform linear skewed slots, described focusing guide pin and straight trough and linear skewed slot are slidably matched, described focusing guide pin is connected with focusing component, described focusing ring is arranged on rear microscope base by focusing ring trim ring, described positive lens E-3 to be arranged on E-3 sheet microscope base and to be compressed by E-3 sheet trim ring, described E-3 sheet microscope base is connected with rear microscope base by screw thread, described rear microscope base is externally connected with focusing motor rack and focusing switch frame, described focusing motor rack is provided with focusing motor, described focusing switch frame is provided with two focusing microswitches.When the rotor rotational movement of motor of focusing, drive focusing ring to rotate, by focusing guide pin, the rotary motion of focusing ring is converted to moving axially of focusing component, thus realizes the focusing function of camera lens.
In the present embodiment, described baffle plate switching mechanism comprises baffle plate, described baffle plate is fixed on apron block by baffle plate pinning, apron block lid is covered with outside described baffle plate, play dust-proof and interception, described baffle plate flap is fixed by screws on apron block, described detector is fixed in detector carriage by detector bracing frame and detector supporting plate, described detector carriage is fixed on apron block by screw, described apron block is connected with baffle plate motor by baffle plate motor rack, and described overhead gage both sides are all connected with baffle plate microswitch by barrier switch frame.When the rotary motion of baffle plate rotor, drive baffle plate to rotate, thus play baffle plate switching effect, realize the correction of detector.
A kind of control method of medium wave infrared continuous zoom lens: rotated by zoom driven by motor cam, the rotary motion of cam is converted to moving axially of zoom assembly and compensation assembly by cam guide pin again, realize the consecutive variations of lens focus, complete zooming procedure; Rotated by focusing driven by motor focusing ring, by focusing guide pin, the rotary motion of focusing ring is converted to moving axially of focusing component, realizes the focusing of camera lens; Rotated by baffle plate driven by motor baffle plate, carry out baffle plate switching, realize the correction of detector.
In the present embodiment, the optical system be made up of above-mentioned lens set reaches following optical index: (1) service band: 3.7 μm-4.8 μm; (2) focal distance f ': 54 ~ 172mm; (3) detector: medium-wave infrared refrigeration mode 320 × 256,30 μm; (4) field angle: 10.2 ° × 8.1 ° ~ 3.2 ° × 2.56 °; (5) relative aperture D/ f ': 1/2; (6) folding rear optics volume: 232mm × 90.6mm × 90.6mm(is long × wide × high).
In the present embodiment, high imaging quality, the compact at full focal length section inner optical system to be reached when optical design, therefore under guarantee optical system imaging quality prerequisite, optical facilities will be simplified as far as possible, reduce the volume of optical system.Through retrieval and the calculating of data, in order to come from the stray radiation beyond scenery radiation in suppression system, the cold stop efficiency of 100% should be adopted.For refrigeration mode infrared optical system, using the emergent pupil of the cold stop of detector as optical system, thus the cold stop efficiency of 100% should be realized.Therefore, this continuous vari-focus system adopts secondary imaging structure, while guarantee realizes 100% cold stop efficiency, can reduce the radial dimension of system.
This variable focal length optical system is made up of front fixed lens, Zoom lens, offset lens, rear fixed lens and secondary imaging lens combination 5 groups of lens.Consider the temperature sensitivity of infrared optical system, reasonably should select the material of lens, from the initial stage of optical design, reduce temperature to the impact of system.In conventional infra-red material, the refractive index temperature variation factor of Si and Ge is relatively low, and the price of Si comparatively Ge is low, proportion is less than Ge, therefore, based on the consideration of cost and weight aspect, select Si as the main material of zoom system, pancreatic system, part lens selects Ge to carry out correcting chromatic aberration.Comparing visible ray material due to infra-red material absorbs comparatively large, but refractive index is also high, so in the design, usually do not need to use too many eyeglass, otherwise the transmitance of system can be very poor, can affect final imaging effect.Take into full account processing technology factor in design, introduce aspheric surface simultaneously and carry out balanced system aberration, the structure of optical system is more simplified, image quality is better, reaches performance, cost and technique and takes into account, and realizes a good design.
Utilize optical design software, rational Optimal Parameters is set, design is optimized to the initial configuration calculated, adopt "+,-,+,-" Zoom structure form; Secondary imaging adopts "+,-,+" version.System is made up of seven lens, and each eyeglass all possesses good process, is easy to processing.First lens are front fixed lens, and second lens is Zoom lens, adopt the germanium material of high index of refraction, 3rd lens are offset lens, adopt the silicon materials of low dispersion, the 4th lens are rear fixed lens, and the 5th, six, seven lens are secondary imaging lens combination.In optical design, in order to balance difference, adopting 3 aspheric surfaces, making system picture element excellent, compact conformation.Photosystem volume is that 232 mm(are long) × 90.6mm(is wide) × 90.6mm(is high), optical weight 237g.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (8)
1. a medium wave infrared continuous zoom lens, it is characterized in that: the physical construction of described camera lens comprises variable focus package, focus pack and the detector assembly installing successively from left to right and be connected on connecting bottom board, described variable focus package comprises front fixed lens A, Zoom lens B, offset lens C, rear fixed lens D and zoom mechanism, described focus pack comprises secondary imaging lens combination E and focusing, and described detector assembly comprises baffle plate switching mechanism and detector and detector carriage; In the optical system of described camera lens, along light from left to right incident direction be provided with front fixed lens A, Zoom lens B, offset lens C, rear fixed lens D, secondary imaging lens combination E successively, described secondary imaging lens combination E is provided with positive lens E-1, negative lens E-2 and positive lens E-3 successively, described fixed lens A and offset lens C is positive lens, and described Zoom lens B and rear fixed lens D is negative lens.
2. medium wave infrared continuous zoom lens according to claim 1, is characterized in that: the airspace between described front fixed lens A and Zoom lens B is 23.9 ~ 36.4mm; Airspace between Zoom lens B and offset lens C is 5 ~ 27.7mm; Airspace between offset lens C and rear fixed lens D is 10 ~ 20.4mm; Airspace between rear fixed lens D and secondary imaging lens combination E is 74.5mm.
3. medium wave infrared continuous zoom lens according to claim 1, is characterized in that: the airspace between described positive lens E-1 and negative lens E-2 is 2mm; Airspace between negative lens E-2 and positive lens E-3 is 17.6mm.
4. medium wave infrared continuous zoom lens according to claim 1, is characterized in that: described zoom mechanism is provided with a precision resistor, and putting in place of described zoom mechanism, focusing and baffle plate switching mechanism controls to adopt microswitch spacing.
5. medium wave infrared continuous zoom lens according to claim 4, it is characterized in that: described zoom mechanism comprises primary mirror seat, zoom assembly and compensation assembly is provided with in described primary mirror seat, before described, fixing group lens A is installed on the front end of primary mirror seat and is fixed and clamped by A sheet trim ring, described zoom group lens B is arranged in zoom assembly, described offset lens C is arranged in compensation assembly, described zoom assembly and compensation assembly to be arranged on guide rod and to be slidably matched, guide rod is fixed in primary mirror seat by guide rod pressing plate, described primary mirror seat is outside equipped with cam, described cam to be placed on primary mirror seat by steel ball and to compress with cam trim ring, form rolling bearing structure, described cam is provided with zoom curved groove and compensated curve groove, zoom curved groove is connected with compensation assembly with zoom assembly respectively by cam guide pin with compensated curve groove, described rear fixing group of lens D is placed in D sheet microscope base and is compressed by D sheet trim ring, described D sheet microscope base by screw attachment at primary mirror base rear end, described D sheet microscope base is externally connected with zoom motor rack and zoom switch frame, described zoom switch frame is provided with zoom motor and zoom potentiometer, described zoom switch frame is provided with two zoom microswitches.
6. medium wave infrared continuous zoom lens according to claim 4, it is characterized in that: described focusing comprises rear microscope base, focusing guide pin, focusing ring, focusing component is provided with in described rear microscope base, described positive lens E-1 and negative lens E-2 is arranged in focusing component, described rear microscope base offers precision machined two 180 ° uniform straight troughs, described focusing ring offers precision machined 2 180 ° uniform linear skewed slots, described focusing guide pin and straight trough and linear skewed slot are slidably matched, described focusing guide pin is connected with focusing component, described focusing ring is arranged on rear microscope base by focusing ring trim ring, described positive lens E-3 to be arranged on E-3 sheet microscope base and to be compressed by E-3 sheet trim ring, described E-3 sheet microscope base is connected with rear microscope base by screw thread, described rear microscope base is externally connected with focusing motor rack and focusing switch frame, described focusing motor rack is provided with focusing motor, described focusing switch frame is provided with two focusing microswitches.
7. medium wave infrared continuous zoom lens according to claim 4, it is characterized in that: described baffle plate switching mechanism comprises baffle plate, described baffle plate is fixed on apron block by baffle plate pinning, apron block lid is covered with outside described baffle plate, described baffle plate flap is fixed by screws on apron block, described detector is fixed in detector carriage by detector bracing frame and detector supporting plate, described detector carriage is fixed on apron block by screw, described apron block is connected with baffle plate motor by baffle plate motor rack, described overhead gage both sides are all connected with baffle plate microswitch by barrier switch frame.
8. the control method of a medium wave infrared continuous zoom lens, it is characterized in that: adopt the medium-wave infrared continuous vari-focus mirror as described in claim 5-7, rotated by zoom driven by motor cam, the rotary motion of cam is converted to moving axially of zoom assembly and compensation assembly by cam guide pin again, realize the consecutive variations of lens focus, complete zooming procedure; Rotated by focusing driven by motor focusing ring, by focusing guide pin, the rotary motion of focusing ring is converted to moving axially of focusing component, realizes the focusing of camera lens; Rotated by baffle plate driven by motor baffle plate, carry out baffle plate switching, realize the correction of detector.
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