High-magnification continuous zooming fog-penetrating lens

Abstract

The utility model discloses a large-magnification continuous zooming fog-penetrating lens, which comprises a front fixed lens group, a zooming lens group, a compensating lens group, a rear fixed lens group, a temperature focusing lens group and an optical filter switcher which are sequentially arranged along the light incidence direction, and is characterized in that the front fixed lens group comprises a first lens and a first gluing group; the zoom lens group comprises a fifth lens and a second gluing group, the compensation lens group comprises an eighth lens and a third gluing group, the rear fixed lens group comprises a fourth gluing group, a fifth gluing group and a fifteenth lens, and the temperature focusing lens group comprises a sixth gluing group. The optical filter switcher comprises an optical filter and an anti-reflection sheet and is used for switching the optical filter and the anti-reflection sheet in the direction perpendicular to the optical axis. By reasonably setting the parameters of each lens and the overall mechanical structure of the lens, electric four-variable functions of focal length, resolving power compensation, aperture and fog penetration are realized, the stability is good, the response speed is high, stray light ghosting can be reduced, chromatic aberration can be corrected, the imaging quality can be improved, the service life can be prolonged, and miniaturization and light weight are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical lenses, and in particular relates to a large-magnification continuous zoom fog-penetrating lens. Background Art

[0002] With the development of science and technology, the market demand for camera lenses that can effectively penetrate low-visibility environments such as fog and smoke, and have flexible zoom capabilities, is growing. Although traditional camera lenses have made significant progress in optical zoom technology and can achieve viewing angle changes from wide angle to telephoto, in foggy or high-humidity environments, images often become blurred due to scattering effects, seriously affecting monitoring or shooting effects. At the same time, the large size and heavy weight of the lens affect its use in some special scenes such as high-speed gimbals, drones, etc. Therefore, it has become an urgent need in the industry to develop a continuous zoom fog-penetrating miniaturized lens that can provide a large zoom range, effectively penetrate the influence of fog, and maintain high-definition imaging. Utility Model Content

[0003] The purpose of the utility model is to propose a large-magnification continuous zoom fog-proof lens in view of the above-mentioned problems, which can achieve a maximum focal length of 7.2 times, resolution compensation at an operating temperature of -30 to 70°C, an aperture of F4.0 to 6.0, and an electric four-variable fog-proof function. It has good stability and fast response speed during zooming, can reduce stray light ghosting, correct chromatic aberration, improve imaging quality and service life, and is conducive to reducing the size and weight of the lens.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The utility model provides a large-magnification continuous zoom fog-penetrating lens, comprising a front fixed lens group, a zoom lens group, a compensating lens group, a rear fixed lens group, a temperature focusing lens group and a filter switcher which are sequentially arranged along the incident direction of light, and the zoom lens group, the compensating lens group and the temperature focusing lens group can all be moved along the optical axis direction, wherein:

[0006] The front fixed lens group includes a first lens and a first cemented group arranged in sequence along the incident direction of light, the variable magnification lens group includes a fifth lens and a second cemented group arranged in sequence along the incident direction of light, the compensation lens group includes an eighth lens and a third cemented group arranged in sequence along the incident direction of light, the rear fixed lens group includes a fourth cemented group, a fifth cemented group and a fifteenth lens arranged in sequence along the incident direction of light, the temperature focusing lens group includes a sixth cemented group, and the filter switch includes a filter and an anti-reflection film, and is used to realize the switching of the filter and the anti-reflection film in the direction perpendicular to the optical axis;

[0007] The high-magnification continuous zoom fog-proof lens also meets the following conditions:

[0008] 161.3mm≤f1≤162.3mm, -47.1mm≤f5≤-46.1mm, 74.9mm≤f8≤75.9mm,

[0009] 18.6mm≤f15≤19.6mm, 380.8mm≤fB1≤410.8mm, -49.5mm≤fB2≤-45.5mm, 80.8mm≤fB3≤84.8mm, -305.8mm≤fB4≤-278.9mm, -23.5mm≤fB5≤-21.5mm,

[0010] -50.1mm≤fB6≤-47.6mm

[0011] Among them, f1 is the focal length of the first lens, f5 is the focal length of the fifth lens, f8 is the focal length of the eighth lens, f15 is the focal length of the fifteenth lens, fB1 is the focal length of the first cemented group, fB2 is the focal length of the second cemented group, fB3 is the focal length of the third cemented group, fB4 is the focal length of the fourth cemented group, fB5 is the focal length of the fifth cemented group, and fB6 is the focal length of the sixth cemented group.

[0012] Preferably, the air gap between the front fixed lens group and the zoom lens group is 9.5mm-40mm, the air gap between the zoom lens group and the compensation lens group is 1mm-61.7mm, the air gap between the compensation lens group and the rear fixed lens group is 3.2mm-33.4mm, and the air gap between the rear fixed lens group and the temperature focusing lens group is 1mm-2.6mm.

[0013] Preferably, the air gap between the first lens and the first cemented group is 0.2±0.05mm, the air gap between the fifth lens and the second cemented group is 4.85±0.05mm, the air gap between the eighth lens and the third cemented group is 0.15±0.05mm, the air gap between the fourth cemented group and the fifth cemented group is 8.56±0.05mm, and the air gap between the fifth cemented group and the fifteenth lens is 1.7±0.05mm.

[0014] Preferably, the first cemented group includes a second lens, a third lens and a fourth lens sequentially arranged along the light incident direction; the second cemented group includes a sixth lens and a seventh lens sequentially arranged along the light incident direction; the third cemented group includes a ninth lens and a tenth lens sequentially arranged along the light incident direction; the fourth cemented group includes an eleventh lens and a twelfth lens sequentially arranged along the light incident direction; the fifth cemented group includes a thirteenth lens and a fourteenth lens sequentially arranged along the light incident direction; the sixth cemented group includes a sixteenth lens and a seventeenth lens sequentially arranged along the light incident direction, and the following conditions are satisfied:

[0015] 82.3mm≤f2≤83.3mm, -61.9mm≤f3≤-60.9mm, 149.6mm≤f4≤150.6mm,

[0016] -23.5mm≤f6≤-22.5mm, 49.2mm≤f7≤50.2mm, -77.6mm≤f9≤-76.6mm,

[0017] 39.2mm≤f10≤40.2mm, 27.5mm≤f11≤28.5mm, -23.7mm≤f12≤-22.7mm,

[0018] 50.4mm≤f13≤51.4mm, -15.5mm≤f14≤-14.5mm, -15.5mm≤f16≤-14.5mm,

[0019] 25.7mm≤f17≤26.7mm

[0020] Among them, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, f9 is the focal length of the ninth lens, f10 is the focal length of the tenth lens, f11 is the focal length of the eleventh lens, f12 is the focal length of the twelfth lens, f13 is the focal length of the thirteenth lens, f14 is the focal length of the fourteenth lens, f16 is the focal length of the sixteenth lens, and f17 is the focal length of the seventeenth lens.

[0021] Preferably, the first lens, the second lens, the eighth lens, the tenth lens, the eleventh lens, the fifteenth lens and the seventeenth lens are all biconvex lenses, the fifth lens and the ninth lens are all negative meniscus lenses, the third lens, the sixth lens, the twelfth lens, the fourteenth lens and the sixteenth lens are all biconcave lenses, and the fourth lens, the seventh lens and the thirteenth lens are all positive meniscus lenses.

[0022] Preferably, the large-magnification continuous zoom fog-penetrating lens also meets the following conditions:

[0023] Nd1=1.44±0.05, Vd1=94.52±0.8%; Nd2=1.62±0.05, Vd2=63.39±0.8%;

[0024] Nd3=1.88±0.05, Vd3=40.81±0.8%; Nd4=1.50±0.05, Vd4=81.61±0.8%;

[0025] Nd5=1.73±0.05, Vd5=54.69±0.8%; Nd6=1.73±0.05, Vd6=54.69±0.8%;

[0026] Nd7=1.95±0.05, Vd7=17.94±0.8%; Nd8=1.59±0.05, Vd8=68.34±0.8%;

[0027] Nd9=1.85±0.05, Vd9=23.79±0.8%; Nd 10 =1.55±0.05, Vd 10 =75.23±0.8%;

[0028] Nd 11 =1.51±0.05, Vd 11 =60.64±0.8%; Nd 12 =1.73±0.05, Vd 12 =51.49±0.8%;

[0029] Nd 13 =1.92±0.05, Vd 13 =20.88±0.8%; Nd 14 =1.80±0.05, Vd 14 =46.58±0.8%;

[0030] Nd 15 =1.53±0.05, Vd 15 =48.84±0.8%; Nd 16 =1.80±0.05, Vd 16 =46.58±0.8%;

[0031] Nd 17 =1.52±0.05, Vd 17 =56.80±0.8%

[0032] Among them, Nd1~Nd 17 Corresponding to the refractive indexes of the first lens to the seventeenth lens, Vd1~Vd 17 They correspond to the dispersion coefficients of the first lens to the seventeenth lens respectively.

[0033] Preferably, the large-magnification continuous zoom fog-penetrating lens further includes a front group lens barrel, an electric variable magnification compensation mechanism, a rear group lens barrel, an electric focusing mechanism, a rear group transition lens barrel and a camera interface, wherein:

[0034] The front group lens barrel is provided with a plurality of first straight grooves parallel to the optical axis, and the front fixed lens group is built in the front group lens barrel;

[0035] The electric zoom compensation mechanism comprises a zoom compensation ring, a zoom movable lens barrel, a compensation movable lens barrel, a first driving mechanism and a plurality of zoom compensation guide pin assemblies corresponding to the first straight grooves, wherein:

[0036] The zoom compensation ring is coaxially sleeved outside the front group lens barrel, and the ring wall is provided with a plurality of zoom curve grooves and a plurality of compensation curve grooves;

[0037] The zoom movable lens barrel and the compensation movable lens barrel are built into the front lens barrel, the zoom lens group is built into the zoom movable lens barrel, and the compensation lens group is built into the compensation movable lens barrel;

[0038] The zoom compensation guide pin assembly comprises a first guide pin, the first guide pin is connected to the zoom movable lens barrel or the compensation movable lens barrel, the first guide pins on the zoom movable lens barrel correspond to each other and pass through the first straight groove and the zoom curved groove in sequence, and the first guide pins on the compensation movable lens barrel correspond to each other and pass through the first straight groove and the compensation curved groove in sequence;

[0039] The first driving mechanism is used to drive the variable magnification compensation to rotate around the axis, thereby driving the variable magnification movable lens barrel and the compensation movable lens barrel to move along the optical axis;

[0040] The rear group lens barrel is connected to the front group lens barrel, the rear fixed lens group is built in the rear group lens barrel, and the ring wall of the rear group lens barrel is also provided with a plurality of second straight grooves parallel to the optical axis;

[0041] The electric focusing mechanism comprises a focusing ring, a focusing movable lens barrel, a second driving mechanism and a plurality of focusing guide pin assemblies, wherein:

[0042] A focusing ring is coaxially sleeved outside the rear lens barrel, and a plurality of focusing curve grooves are provided on the ring wall;

[0043] The focusing movable lens barrel is built into the rear lens barrel, and the temperature focusing lens group is built into the focusing movable lens barrel;

[0044] A focusing guide pin assembly comprises a second guide pin, which is connected to the focusing movable lens barrel and passes through the second straight groove and the focusing curved groove in a one-to-one correspondence;

[0045] The second driving mechanism is used to drive the focus adjustment to rotate around the axis, thereby driving the focus adjustment movable lens barrel to move along the optical axis;

[0046] A rear group transition lens barrel is connected to the rear group lens barrel, and a filter switch is built in the rear group transition lens barrel;

[0047] The camera interface is connected to the rear group transition lens barrel and is used to connect the camera.

[0048] Preferably, the first driving mechanism includes a first potentiometer, a first motor, a first motor gear, a first potentiometer gear and a zoom compensation gear, the zoom compensation gear is coaxially connected to the zoom compensation ring, the first motor gear and the first potentiometer gear are both meshed with the zoom compensation gear, the first motor and the first potentiometer are both connected to the front group lens barrel, and the first motor drives the zoom compensation ring and the first potentiometer gear to rotate by driving the first motor gear to rotate, thereby driving the zoom lens group and the compensation lens group to move along the optical axis to achieve zooming, and the first potentiometer is used to detect the rotation amount of the first potentiometer gear to form a first resistance signal and send it to the camera to determine the focal length of the lens, or to receive the first resistance signal sent by the camera to drive the first motor to achieve zooming;

[0049] The second driving mechanism includes a second potentiometer, a second motor, a second motor gear, a second potentiometer gear and a focusing gear, the focusing gear is coaxially connected to the focusing ring, the second motor gear and the second potentiometer gear are both meshed with the focusing gear, the second potentiometer and the second motor are both connected to the rear group lens barrel, and the second motor drives the focusing ring and the second potentiometer gear to rotate by driving the second motor gear to rotate, thereby driving the temperature focusing lens group to move along the optical axis to achieve focusing, and the second potentiometer is used to detect the rotation amount of the second potentiometer gear to form a second resistance signal and send it to the camera to determine the lens defocus amount, or to receive the second resistance signal sent by the camera to drive the second motor to achieve focusing;

[0050] The zoom compensation guide pin assembly also includes two miniature bearings and at least one bearing gasket sleeved on the first guide pin, the bearing gasket is located between the two miniature bearings, and the miniature bearing close to the zoom movable lens barrel is slidably connected to the corresponding first straight groove, and the miniature bearing away from the zoom movable lens barrel is slidably connected to the corresponding zoom curve groove or compensation curve groove;

[0051] The focusing guide pin assembly also includes a focusing guide pin sleeve, which is coaxially sleeved outside the second guide pin in a one-to-one correspondence and forms a rotational connection, and the focusing guide pin sleeve is also slidably connected to the corresponding second straight groove and the focusing curved groove;

[0052] A plurality of balls are also arranged between the zoom compensation ring and the adjacent ring wall of the front group lens barrel.

[0053] Preferably, the high-magnification continuous zoom fog-penetrating lens further includes a variable iris, which is located between the compensating lens group and the rear fixed lens group, the air gap between the compensating lens group and the variable iris is 3mm-33.2mm, and the air gap between the variable iris and the rear fixed lens group is 0.1mm-0.3mm.

[0054] Preferably, each lens satisfies R<0.3% in the band of λ=500nm~1000nm; the anti-reflection film satisfies T≤0.5% in the band of λ<850nm, and T>95% in the band of λ=850nm~1000nm; the filter satisfies T>95% in the band of λ=550nm~750nm, and T<0.7% in the band of λ=850nm~1000nm, wherein λ is the wavelength, R is the reflectivity, and T is the transmittance.

[0055] Compared with the prior art, the beneficial effects of the utility model are:

[0056] The lens can achieve a maximum focal length of 7.2 times, resolution compensation at an operating temperature of -30 to 70°C, an aperture of F4.0 to 6.0, and an electric four-variable fog-penetrating function. Specifically, the lens meets the following indicators (focal length: 50mm to 360mm; maximum image height: φ18.8mm; aperture F: 4.0 to 6.0; operating wavelength: 500 to 1000nm; lens shape: 200mm×φ71mm). While achieving large light throughput and a large target surface, it reduces lens stray light ghosting, corrects chromatic aberration, improves imaging quality and service life, and is beneficial to reducing the size and weight of the lens. It has good stability and fast response speed during zooming, and can search and track targets at long and short distances. It can be applied to the stringent requirements of various application scenarios such as high-end monitoring, military reconnaissance, aviation and navigation, and forest fire prevention, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a schematic diagram of the structure of the large-magnification continuous zoom fog-penetrating lens of the utility model;

[0058] Figure 2 This is a three-dimensional diagram of the assembly of the large-magnification continuous zoom fog-penetrating lens of the utility model;

[0059] Figure 3 For this utility model Figure 2 The main view of

[0060] Figure 4 For this utility model Figure 2 A top view of

[0061] Figure 5 For this utility model Figure 3 Sectional view AA;

[0062] Figure 6 For this utility model Figure 5 A partial enlarged view of C;

[0063] Figure 7 It is a stereoscopic diagram of the zoom compensation ring of the utility model;

[0064] Figure 8This is an expanded view of the outer circle of the variable magnification compensation ring of the utility model.

[0065] Explanation of reference numerals: 11, front fixed lens group; 12, zoom lens group; 13, compensation lens group; 14, variable aperture; 15, rear fixed lens group; 16, temperature focusing lens group; 17, filter switch; Sensor, photosensitive chip; 101, first lens; 102, second lens; 103, third lens; 104, fourth lens; 105, fifth lens; 106, sixth lens; 107, seventh lens; 108, eighth lens; 109, ninth lens; 110, tenth lens; 111, eleventh lens; 112, sixth lens; 113, seventh lens; 114, eighth lens; 115, eighth lens; 116, eighth lens; 117, eighth lens; 118, eighth lens; 119, ninth lens; 120, tenth lens; 121, eleventh lens; 122, eighth lens; 123, eighth lens; 124, eighth lens; 125, eighth lens; 126, eighth lens; 127, eighth lens; 128, eighth lens; 129, ninth lens; 130, tenth lens; 131, eleventh lens; 132, eighth lens; 133, eighth lens; 134, eighth lens; 135, eighth lens; 136, eighth lens; 137, eighth lens; 138, eighth lens; 139, ninth lens; 140, tenth lens; 141, eleventh lens; 142, 143, 144, 145 2, the twelfth lens; 113, the thirteenth lens; 114, the fourteenth lens; 115, the fifteenth lens; 116, the sixteenth lens; 117, the seventeenth lens; B1, the first cementing group; B2, the second cementing group; B3, the third cementing group; B4, the fourth cementing group; B5, the fifth cementing group; B6, the sixth cementing group; 201, the first spacer; 202, the second spacer; 203, the third spacer; 204, the fourth spacer; 301, the first pressure ring; 302, the second pressure ring; 303, the third pressure ring; 304, the fourth pressure ring; 305, fifth pressing ring; 306, sixth pressing ring; 401, front group lens barrel; 402, zoom compensation ring; 403, rear group lens barrel; 404, focusing ring; 405, rear group transition lens barrel; 406, camera interface; 407, zoom movable lens barrel; 408, compensation movable lens barrel; 409, focus movable lens barrel; 410, base; 411, fixing seat; 412, first motor frame; 413, second motor frame; 4021, zoom curve slot; 4022, compensation curve slot; 501, first potentiometer; 502, second potentiometer ; 503, the first motor; 504, the second motor; 505, the front group optical coupling element; 506, the rear group optical coupling element; 61, the ball; 62, the zoom compensation guide pin assembly; 621, the miniature bearing; 622, the first guide pin; 623, the bearing gasket; 63, the focusing guide pin assembly; 631, the second guide pin; 632, the focusing guide pin sleeve; 701, the first motor gear; 702, the second motor gear; 703, the first potentiometer gear; 704, the second potentiometer gear; 801, the front group optical coupling block; 802, the rear group optical coupling block. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0067] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be an intermediate component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of this application. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0068] The present application proposes a large-magnification electric-controlled continuous zoom lens with a fog-penetrating function. The optical glass material with a high refractive index and a low dispersion coefficient is combined with a precise mechanical structure to achieve stability and rapid response during the zooming process. The overall quality and volume of the lens are improved compared to similar products on the market, thereby meeting the stringent requirements of various application scenarios such as high-end monitoring, military reconnaissance, aviation and navigation, and forest fire prevention.

[0069] like Figure 1-8 As shown, a large-magnification continuous zoom fog-penetrating lens comprises a front fixed lens group 11, a zoom lens group 12, a compensating lens group 13, a rear fixed lens group 15, a temperature focusing lens group 16 and a filter switch 17 which are arranged in sequence along the incident direction of light. The zoom lens group 12, the compensating lens group 13 and the temperature focusing lens group 16 can all be moved along the optical axis direction, wherein:

[0070] The front fixed lens group 11 includes a first lens 101 and a first cemented group B1 arranged in sequence along the incident direction of light, the zoom lens group 12 includes a fifth lens 105 and a second cemented group B2 arranged in sequence along the incident direction of light, the compensation lens group 13 includes an eighth lens 108 and a third cemented group B3 arranged in sequence along the incident direction of light, the rear fixed lens group 15 includes a fourth cemented group B4, a fifth cemented group B5 and a fifteenth lens 115 arranged in sequence along the incident direction of light, the temperature focusing lens group 16 includes a sixth cemented group B6, and the filter switch 17 includes a filter and an anti-reflection film, and is used to realize the switching of the filter and the anti-reflection film in the direction perpendicular to the optical axis;

[0071] The high-magnification continuous zoom fog-proof lens also meets the following conditions:

[0072] 161.3mm≤f1≤162.3mm, -47.1mm≤f5≤-46.1mm, 74.9mm≤f8≤75.9mm,

[0073] 18.6mm≤f15≤19.6mm, 380.8mm≤fB1≤410.8mm, -49.5mm≤fB2≤-45.5mm, 80.8mm≤fB3≤84.8mm, -305.8mm≤fB4≤-278.9mm, -23.5mm≤fB5≤-21.5mm,

[0074] -50.1mm≤fB6≤-47.6mm

[0075] Among them, f1 is the focal length of the first lens 101, f5 is the focal length of the fifth lens 105, f8 is the focal length of the eighth lens 108, f15 is the focal length of the fifteenth lens 115, fB1 is the focal length of the first cemented group B1, fB2 is the focal length of the second cemented group B2, fB3 is the focal length of the third cemented group B3, fB4 is the focal length of the fourth cemented group B4, fB5 is the focal length of the fifth cemented group B5, and fB6 is the focal length of the sixth cemented group B6.

[0076] like Figure 1 As shown, the light sequentially passes through the front fixed lens group 11, the variable lens group 12, the compensation lens group 13, the variable aperture 14, the rear fixed lens group 15, the temperature focusing lens group 16 and the filter switch 17 to reach the photosensitive chip Sensor (such as located in an external camera) for imaging, and the filter switch 17 completes the switching of the filter and the anti-reflection film to achieve the selection of the fog-penetrating function. The filter switch 17 is a prior art structure well known to those skilled in the art, and is used to switch the filter, anti-reflection film, etc. The filter and anti-reflection film can be selected according to actual needs, and will not be repeated here.

[0077] In one embodiment, the air gap between the front fixed lens group 11 and the zoom lens group 12 is 9.5 mm-40 mm, the air gap between the zoom lens group 12 and the compensation lens group 13 is 1 mm-61.7 mm, the air gap between the compensation lens group 13 and the rear fixed lens group 15 is 3.2 mm-33.4 mm, and the air gap between the rear fixed lens group 15 and the temperature focusing lens group 16 is 1 mm-2.6 mm.

[0078] In one embodiment, the air gap between the first lens 101 and the first cemented group B1 is 0.2±0.05 mm, the air gap between the fifth lens 105 and the second cemented group B2 is 4.85±0.05 mm, the air gap between the eighth lens 108 and the third cemented group B3 is 0.15±0.05 mm, the air gap between the fourth cemented group B4 and the fifth cemented group B5 is 8.56±0.05 mm, and the air gap between the fifth cemented group B5 and the fifteenth lens 115 is 1.7±0.05 mm.

[0079] In one embodiment, the first cemented group B1 includes a second lens 102, a third lens 103 and a fourth lens 104 arranged in sequence along the light incident direction; the second cemented group B2 includes a sixth lens 106 and a seventh lens 107 arranged in sequence along the light incident direction; the third cemented group B3 includes a ninth lens 109 and a tenth lens 110 arranged in sequence along the light incident direction; the fourth cemented group B4 includes an eleventh lens 111 and a twelfth lens 112 arranged in sequence along the light incident direction; the fifth cemented group B5 includes a thirteenth lens 113 and a fourteenth lens 114 arranged in sequence along the light incident direction; the sixth cemented group B6 includes a sixteenth lens 116 and a seventeenth lens 117 arranged in sequence along the light incident direction, and the following conditions are satisfied:

[0080] 82.3mm≤f2≤83.3mm, -61.9mm≤f3≤-60.9mm, 149.6mm≤f4≤150.6mm,

[0081] -23.5mm≤f6≤-22.5mm, 49.2mm≤f7≤50.2mm, -77.6mm≤f9≤-76.6mm,

[0082] 39.2mm≤f10≤40.2mm, 27.5mm≤f11≤28.5mm, -23.7mm≤f12≤-22.7mm,

[0083] 50.4mm≤f13≤51.4mm, -15.5mm≤f14≤-14.5mm, -15.5mm≤f16≤-14.5mm,

[0084] 25.7mm≤f17≤26.7mm

[0085] Among them, f2 is the focal length of the second lens 102, f3 is the focal length of the third lens 103, f4 is the focal length of the fourth lens 104, f6 is the focal length of the sixth lens 106, f7 is the focal length of the seventh lens 107, f9 is the focal length of the ninth lens 109, f10 is the focal length of the tenth lens 110, f11 is the focal length of the eleventh lens 111, f12 is the focal length of the twelfth lens 112, f13 is the focal length of the thirteenth lens 113, f14 is the focal length of the fourteenth lens 114, f16 is the focal length of the sixteenth lens 116, and f17 is the focal length of the seventeenth lens 117.

[0086] In one embodiment, the first lens 101, the second lens 102, the eighth lens 108, the tenth lens 110, the eleventh lens 111, the fifteenth lens 115 and the seventeenth lens 117 are all biconvex lenses, the fifth lens 105 and the ninth lens 109 are all negative meniscus lenses, the third lens 103, the sixth lens 106, the twelfth lens 112, the fourteenth lens 114 and the sixteenth lens 116 are all biconcave lenses, and the fourth lens 104, the seventh lens 107 and the thirteenth lens 113 are all positive meniscus lenses.

[0087] In one embodiment, the large-magnification continuous zoom fog-penetrating lens further satisfies the following conditions:

[0088] Nd1=1.44±0.05, Vd1=94.52±0.8%; Nd2=1.62±0.05, Vd2=63.39±0.8%;

[0089] Nd3=1.88±0.05, Vd3=40.81±0.8%; Nd4=1.50±0.05, Vd4=81.61±0.8%;

[0090] Nd5=1.73±0.05, Vd5=54.69±0.8%; Nd6=1.73±0.05, Vd6=54.69±0.8%;

[0091] Nd7=1.95±0.05, Vd7=17.94±0.8%; Nd8=1.59±0.05, Vd8=68.34±0.8%;

[0092] Nd9=1.85±0.05, Vd9=23.79±0.8%; Nd 10 =1.55±0.05, Vd 10 =75.23±0.8%;

[0093] Nd 11 =1.51±0.05, Vd 11 =60.64±0.8%; Nd 12 =1.73±0.05, Vd 12 =51.49±0.8%;

[0094] Nd 13 =1.92±0.05, Vd 13 =20.88±0.8%; Nd 14 =1.80±0.05, Vd 14 =46.58±0.8%;

[0095] Nd 15 =1.53±0.05, Vd 15=48.84±0.8%; Nd 16 =1.80±0.05, Vd 16 =46.58±0.8%;

[0096] Nd 17 =1.52±0.05, Vd 17 =56.80±0.8%

[0097] Among them, Nd1~Nd 17 The refractive indices Vd1 to Vd2 correspond to the refractive indices of the first lens 101 to the seventeenth lens 117, Vd1 to Vd3. 17 They correspond to the chromatic aberration coefficients of the first lens 101 to the seventeenth lens 117 in sequence.

[0098] In one embodiment, the high-magnification continuous zoom fog-penetrating lens further includes a front group lens barrel 401, an electric variable magnification compensation mechanism, a rear group lens barrel 403, an electric focusing mechanism, a rear group transition lens barrel 405 and a camera interface 406, wherein:

[0099] The front lens barrel 401 is provided with a plurality of first straight grooves parallel to the optical axis, and the front fixed lens group 11 is built in the front lens barrel 401;

[0100] The electric zoom compensation mechanism includes a zoom compensation ring 402, a zoom movable lens barrel 407, a compensation movable lens barrel 408, a first driving mechanism, and a plurality of zoom compensation guide pin assemblies 62 corresponding to the first straight grooves, wherein:

[0101] The zoom compensation ring 402 is coaxially sleeved outside the front lens barrel 401, and the ring wall is provided with a plurality of zoom curve grooves 4021 and a plurality of compensation curve grooves 4022;

[0102] The variable-power movable lens barrel 407 and the compensating movable lens barrel 408 are built into the front lens barrel 401 , and the variable-power lens group 12 is built into the variable-power movable lens barrel 407 , and the compensating lens group 13 is built into the compensating movable lens barrel 408 ;

[0103] The zoom compensation guide pin assembly 62 includes a first guide pin 622, which is connected to the zoom movable lens barrel 407 or the compensation movable lens barrel 408. The first guide pin 622 on the zoom movable lens barrel 407 passes through the first straight groove and the zoom curved groove 4021 in a one-to-one correspondence, and the first guide pin 622 on the compensation movable lens barrel 408 passes through the first straight groove and the compensation curved groove 4022 in a one-to-one correspondence.

[0104] The first driving mechanism is used to drive the zoom compensation ring 402 to rotate around the axis, thereby driving the zoom movable lens barrel 407 and the compensation movable lens barrel 408 to move along the optical axis;

[0105] The rear lens barrel 403 is connected to the front lens barrel 401. The rear fixed lens group 15 is built in the rear lens barrel 403. The annular wall of the rear lens barrel 403 is also provided with a plurality of second straight grooves parallel to the optical axis.

[0106] The electric focusing mechanism comprises a focusing ring 404, a focusing movable lens barrel 409, a second driving mechanism and a plurality of focusing guide pin assemblies 63, wherein:

[0107] A focusing ring 404 is coaxially sleeved outside the rear lens barrel 403, and a plurality of focusing curved grooves are formed on the ring wall;

[0108] The focus movable lens barrel 409 is built in the rear lens barrel 403, and the temperature focusing lens group 16 is built in the focus movable lens barrel 409;

[0109] The focusing guide pin assembly 63 includes a second guide pin 631, which is connected to the focusing movable lens barrel 409 and passes through the second straight groove and the focusing curved groove in a one-to-one correspondence;

[0110] The second driving mechanism is used to drive the focus ring 404 to rotate around the axis, thereby driving the focus movable barrel 409 to move along the optical axis;

[0111] The rear group transition lens barrel 405 is connected to the rear group lens barrel 403, and the filter switch 17 is built in the rear group transition lens barrel 405;

[0112] The camera interface 406 is connected to the rear transition lens barrel 405 and is used to connect a camera.

[0113] Among them, Figure 7 , 8 As shown, they correspond to the structural diagram and the expanded diagram of the zoom compensation ring 402, respectively. Figure 8 The height of the middle zoom curve groove 4021 along the optical axis direction is 30.5mm, which meets the moving stroke range of the optically designed zoom lens group 12; the height of the compensation curve groove 4022 along the optical axis direction is 30.2mm, which meets the moving stroke range of the optically designed compensation lens group 13; the stroke difference between the zoom curve groove 4021 and the compensation curve groove 4022 is 1mm~61.7mm, which meets the air gap between the optically designed zoom lens group 12 and the compensation lens group 13; the expansion angle of the zoom curve groove 4021 and the compensation curve groove 4022 is 140°, which can effectively reduce the pressure angle of the zoom curve groove 4021 and the compensation curve groove 4022, reduce the displacement resistance of the zoom compensation guide pin assembly 62, and make the zoom process smooth and without jamming.

[0114] The first driving mechanism and the second driving mechanism are respectively connected to the front lens group barrel 401 and the rear lens group barrel 403, and can be directly connected or connected through an adapter, such as Figure 2As shown, the adapter includes a base 410, a fixing base 411, a first motor frame 412 and a second motor frame 413. The fixing base 411 is connected to the base 410, the first motor frame 412 and the second motor frame 413 are connected to the fixing base 411, the first driving mechanism is connected to the first motor frame 412, and the second driving mechanism is connected to the second motor frame 413. The adapter formed by the base 410, the fixing base 411, the first motor frame 412 and the second motor frame 413 can also be an integrated structure.

[0115] In one embodiment, the first driving mechanism includes a first potentiometer 501, a first motor 503, a first motor gear 701, a first potentiometer gear 703 and a zoom compensation gear, the zoom compensation gear is coaxially connected to the zoom compensation ring 402, the first motor gear 701 and the first potentiometer gear 703 are both meshed with the zoom compensation gear, the first motor 503 and the first potentiometer 501 are both connected to the front group lens barrel 401, and the first motor 503 drives the zoom compensation ring 402 and the first potentiometer gear 703 to rotate by driving the first motor gear 701 to rotate, thereby driving the zoom lens group 12 and the compensation lens group 13 to move along the optical axis to achieve zooming, and the first potentiometer 501 is used to detect the rotation amount of the first potentiometer gear 703 to form a first resistance signal and send it to the camera to determine the focal length of the lens, or to receive the first resistance signal sent by the camera to drive the first motor 503 to achieve zooming;

[0116] The second driving mechanism includes a second potentiometer 502, a second motor 504, a second motor gear 702, a second potentiometer gear 704 and a focusing gear, the focusing gear is coaxially connected to the focusing ring 404, the second motor gear 702 and the second potentiometer gear 704 are both meshed with the focusing gear, the second potentiometer 502 and the second motor 504 are both connected to the rear group lens barrel 403, and the second motor 504 drives the focusing ring 404 and the second potentiometer gear 704 to rotate by driving the second motor gear 702 to rotate, thereby driving the temperature focusing lens group 16 to move along the optical axis to achieve focusing, and the second potentiometer 502 is used to detect the rotation amount of the second potentiometer gear 704 to form a second resistance signal and send it to the camera to determine the lens defocus amount, or is used to receive the second resistance signal sent by the camera to drive the second motor 504 to achieve focusing;

[0117] The zoom compensation guide pin assembly 62 further includes two micro bearings 621 and at least one bearing gasket 623 sleeved on the first guide pin 622, the bearing gasket 623 is located between the two micro bearings 621, and the micro bearing 621 close to the zoom movable lens barrel 407 is slidably connected to the corresponding first straight groove, and the micro bearing 621 away from the zoom movable lens barrel 407 is slidably connected to the corresponding zoom curved groove 4021 or the compensation curved groove 4022;

[0118] The focus guide pin assembly 63 further includes a focus guide pin sleeve 632, which is coaxially sleeved outside the second guide pin 631 in a one-to-one correspondence and forms a rotation connection, and the focus guide pin sleeve 632 is also slidably connected to the corresponding second straight groove and the focus curved groove;

[0119] A plurality of balls 61 are disposed between the zoom compensation ring 402 and the adjacent ring wall of the front group lens barrel 401 .

[0120] Among them, the large-magnification continuous zoom fog-penetrating lens can achieve electric continuous zoom and focus, with fast response speed, smooth zoom and long service life.

[0121] It should be noted that if the present application discloses or involves mutually fixedly connected parts, then unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection such as using bolts or screws, or an irremovable fixed connection such as riveting or glue. And any component provided in the present application can be a component composed of multiple separate parts, or a component processed in one piece.

[0122] In one embodiment, the large-magnification continuous zoom fog-penetrating lens further includes a variable iris 14, which is located between the compensation lens group 13 and the rear fixed lens group 15. The air interval between the compensation lens group 13 and the variable iris 14 is 3 mm-33.2 mm, and the air interval between the variable iris 14 and the rear fixed lens group 15 is 0.1 mm-0.3 mm. The variable iris 14 is a prior art structure well known to those skilled in the art, and is used to adjust the aperture size of the lens, and will not be described in detail here.

[0123] In one embodiment, each lens satisfies R<0.3% in the wavelength band of λ=500nm~1000nm; the anti-reflection film satisfies T≤0.5% in the wavelength band of λ<850nm, and T>95% in the wavelength band of λ=850nm~1000nm; the filter satisfies T>95% in the wavelength band of λ=550nm~750nm, and T<0.7% in the wavelength band of λ=850nm~1000nm, wherein λ is the wavelength, R is the reflectivity, and T is the transmittance.

[0124] Among them, the filter switch 17 can control the filter and the anti-reflection film to switch back and forth perpendicular to the optical axis. The filter has the function of cutting off the transmission of light with a wavelength of 850nm to 1000nm. When the lens does not need the defogging function, the filter switch 17 switches the filter to work in the optical path; the anti-reflection film has the function of cutting off the transmission of light with a wavelength less than 850nm and enhancing the transmission of light with a wavelength of 850nm to 1000nm. When the lens needs the defogging function, the filter switch 17 switches the anti-reflection film to work in the optical path. It can meet the use of working wavelengths of 500nm to 1000nm, and when the overall light transmittance of the lens is met, it helps to reduce the coating cost.

[0125] The invention is described in detail below through specific embodiments.

[0126] In this embodiment, the high-power continuous zoom fog-penetrating lens comprises a front fixed lens group 11, a zoom lens group 12, a compensation lens group 13, a rear fixed lens group 15, a temperature focusing lens group 16 and a filter switch 17, as well as a front lens group barrel 401, an electric zoom compensation mechanism, a rear lens group barrel 403, an electric focusing mechanism, a rear transition lens group barrel 405 and a camera interface 406. Among them, the front fixed lens group 11 comprises a first lens 101, a second lens 102, a third lens 103 and a fourth lens 104, the zoom lens group 12 comprises a fifth lens 105, a sixth lens 106 and a seventh lens 107, the compensation lens group 13 comprises an eighth lens 108, a ninth lens 109 and a tenth lens 110, the rear fixed lens group 15 comprises an eleventh lens 111, a twelfth lens 112, a thirteenth lens 113, a fourteenth lens 114 and a fifteenth lens 115, and the temperature focusing lens group comprises a sixteenth lens 116 and a seventeenth lens 117. The first lens 101 to the seventeenth lens 117 are arranged in sequence along the optical axis. The first lens 101, the second lens 102, the eighth lens 108, the tenth lens 110, the eleventh lens 111, the fifteenth lens 115 and the seventeenth lens 117 are all biconvex lenses, the fifth lens 105 and the ninth lens 109 are all negative meniscus lenses, the third lens 103, the sixth lens 106, the twelfth lens 112, the fourteenth lens 114 and the sixteenth lens 116 are all biconcave lenses, and the fourth lens 104, the seventh lens 107 and the thirteenth lens 113 are all positive meniscus lenses.

[0127] like Figure 2-5As shown, the front fixed lens group 11, the zoom movable lens barrel 407 and the compensating movable lens barrel 408 are located in the front group lens barrel 401, the zoom lens group 12 is located in the zoom movable lens barrel 407, the compensating lens group 13 is located in the compensating movable lens barrel 408, the zoom compensation ring 402 is coaxially sleeved outside the front group lens barrel 401, the variable aperture 14, the rear fixed lens group 15, and the focusing movable lens barrel 409 are located in the rear group lens barrel 403, the focusing ring 404 is coaxially sleeved outside the rear group lens barrel 403, the temperature focusing lens group 16 is located in the focusing movable lens barrel 409, the filter switch 17 is located in the rear group transition lens barrel 405, and a photosensitive chip Sensor is provided on the camera connected to the camera interface 406. During actual assembly, the large-magnification continuous zoom fog-penetrating lens can also be adaptively provided with a plurality of spacers and pressure rings, such as the present embodiment including a first spacer 201, a second spacer 202, a third spacer 203, a fourth spacer 204, a first pressure ring 301, a second pressure ring 302, a third pressure ring 303, a fourth pressure ring 304, a fifth pressure ring 305 and a sixth pressure ring 306, wherein the first spacer 201 is located between the first lens 101 and the second lens 102, the second spacer 202 is located between the eighth lens 108 and the ninth lens 109, the third spacer 203 is located between the twelfth lens 112 and the thirteenth lens 113, and the fourth spacer 204 is located between the fourteenth lens 114 and the fifteenth lens 115. The first pressing ring 301 is connected to the front group lens barrel 401 and is used to press and fix the first lens 101, the second pressing ring 302 is connected to the zoom movable lens barrel 407 and is used to press and fix the fifth lens 105, the third pressing ring 303 is connected to the compensation movable lens barrel 408 and is used to press and fix the third gluing group B3, the fifth pressing ring 305 is connected to the rear group lens barrel 403 and is used to press and fix the fourth gluing group B4, and the sixth pressing ring 306 is connected to the focusing movable lens barrel 409 and is used to press and fix the sixth gluing group B6. A plurality of ball bearings 61 are respectively provided at both ends of the zoom compensation ring 402 to reduce sliding friction and jamming, thereby ensuring smooth operation and a long service life. In addition, the end of the zoom compensation ring 402 close to the rear group lens barrel 403 is also pressed by a fourth pressure ring 304 sleeved on the outside of the front group lens barrel 401, and a rolling bearing structure is formed by the ball bearings 61, so that the sliding friction of the zoom compensation ring 402 when rotating on the front group lens barrel 401 is converted into rolling friction, thereby reducing the friction during the zooming process.

[0128] like Figure 7 , 8As shown, the zoom compensation ring 402 is milled with a zoom curve groove 4021 and a compensation curve groove 4022 according to the optical zoom motion equation, and then the zoom compensation guide pin assembly 62 composed of a micro bearing 621, a first guide pin 622, and a bearing gasket 623 is fixed to the corresponding zoom movable lens barrel 407 and the compensation movable lens barrel 408. The first motor gear 701 is connected to the first motor 503, the first potentiometer gear 703 is connected to the first potentiometer 501, and the first motor gear 701 and the first potentiometer gear 703 are both engaged with the zoom compensation gear on the zoom compensation ring 402. When the first motor 503 is powered on and rotated, it drives the magnification compensation ring 402 and the first potentiometer gear 703 to rotate synchronously, and then the magnification compensation guide pin assembly 62 on the magnification movable lens barrel 407 cooperates with the magnification curve groove 4021 and the first straight groove parallel to the optical axis on the front group lens barrel 401 to drive the magnification movable lens barrel 407 to make a linear reciprocating motion, and the magnification compensation guide pin assembly 62 on the compensating movable lens barrel 408 cooperates with the compensation curve groove 4022 and the first straight groove parallel to the optical axis on the front group lens barrel 401 to drive the compensating movable lens barrel 408 to make a linear reciprocating motion, and one magnification compensation guide pin assembly 62 corresponds to one first straight groove. The two micro bearings 621 on the zoom compensation guide pin assembly 62 respectively cooperate with the first straight groove on the front group lens barrel 401 and the groove on the zoom compensation ring 402. Specifically, in the present embodiment, the number of the zoom compensation guide pin assemblies 62 is four, the number of the first straight grooves on the front group lens barrel 401 is four, the number of the zoom curve groove 4021 and the number of the compensation curve groove 4022 on the zoom compensation ring 402 are two, and one first guide pin 622 can be penetrated by one first straight groove and one of the zoom curve groove 4021 and the compensation curve groove 4022. Then, the two micro bearings 621 located on the first guide pin 622 respectively cooperate with the corresponding first straight groove and the groove on the zoom compensation ring 402. The micro bearings 621 can be further adjusted through precision machining technology to strictly control the matching clearance between the micro bearing 621 and the front group lens barrel 401 or the zoom compensation ring 402 to reduce the friction and movement during the actuation process, thereby ensuring that the zoom and compensation process of the electric zoom compensation mechanism is smooth and free of jamming. In this way, the first motor 503 enables the zoom lens group 12 and the compensation lens group 13 to perform linear motion according to the optical zoom equation, thereby realizing the function of continuously variable focal length. When the focal length of the lens changes, the zoom compensation ring 402 engages to drive the first potentiometer gear 703 to rotate, and the resistance signal change on the first potentiometer 501 is transmitted to the camera, thereby realizing the function of recording the change of the lens focal length value; conversely, the camera can realize the function of controlling the lens focal length value by outputting the resistance signal.

[0129] For the electric focusing mechanism, the focusing ring 404 is mounted on the rear group lens barrel 403 and is pressed by the rear group transition lens barrel 405. The focusing ring 404 is milled with a plurality of focusing curve grooves according to optical requirements, and the focusing guide pin assembly 63 is fixed on the focusing movable lens barrel 409. The second motor gear 702 is connected to the second motor 504, the second potentiometer gear 704 is connected to the second potentiometer 502, and the second motor gear 702 and the second potentiometer gear 704 are both engaged with the focusing gear on the focusing ring 404. When the second motor 504 is powered on and rotated, the focusing ring 404 and the second potentiometer gear 704 are driven to rotate synchronously, and then the focusing movable lens barrel 409 is driven to perform linear reciprocating motion through the cooperation of the focusing guide pin assembly 63 on the focusing movable lens barrel 409 with the focusing curve groove and the second straight groove on the rear group lens barrel 403 parallel to the optical axis. In this way, the temperature focusing lens group 16 is made to move linearly according to the requirements of the optical zoom equation through the second motor 504, thereby realizing the remote electric control of the lens to refocus clearly under the change of ambient temperature. It can be further adjusted through precision processing technology to strictly control the matching clearance between the focus guide sleeve 632 and the focus curve groove to ensure the smooth movement of the electric focus mechanism without jamming. When the focus ring 404 rotates, the focus ring 404 engages and drives the second potentiometer gear 704 to rotate, and the resistance signal change on the second potentiometer 502 is transmitted to the camera, thereby realizing the recordable function of the change of the lens defocus compensation value; conversely, the camera can realize the function of fast focusing of the lens by outputting the resistance signal to complete the temperature compensation focusing of the lens.

[0130] The large-magnification continuous zoom fog-penetrating lens may also be provided with a front group optical coupling element 505, a rear group optical coupling element 506, a front group optical coupling block 801, and a rear group optical coupling block 802, all of which are multiple. The front group optical coupling element 505 is connected to the front group lens barrel 401, the rear group optical coupling element 506 is connected to the rear group lens barrel 403, the front group optical coupling block 801 is connected to the zoom compensation ring 402, and the rear group optical coupling block 802 is connected to the focus ring 404. The rotation limit of the zoom compensation ring 402 is achieved by the inductive cooperation of the front group optical coupling element 505 and the front group optical coupling block 801, and the rotation limit of the focus ring 404 is achieved by the inductive cooperation of the rear group optical coupling element 506 and the rear group optical coupling block 802. It should be noted that the connection described here can be a direct connection or a connection through an adapter.

[0131] The parameters of the optical lens in this embodiment are shown in Tables 1, 2, and 3:

[0132] Table 1 Focal length, refractive index, dispersion coefficient, and center thickness of each lens

[0133] lens Focal length / mm Refractive Index Dispersion coefficient Center thickness / mm First lens 161.7 1.44±0.001 94.52±0.8％ 10.4±0.05 Second lens 82.5 1.62±0.001 63.39±0.8％ 12±0.05 The third lens -61.6 1.88±0.001 40.81±0.8％ 2.5±0.05 The fourth lens 149.7 1.50±0.001 81.61±0.8％ 6.6±0.05 Fifth lens -47.0 1.73±0.001 54.69±0.8％ 2.2±0.05 The sixth lens -23.3 1.73±0.001 54.69±0.8％ 1±0.05 Seventh lens 49.6 1.95±0.001 17.94±0.8％ 2.5±0.05 The eighth lens 74.9 1.59±0.001 68.34±0.8％ 3.3±0.05 The ninth lens -77.1 1.85±0.001 23.79±0.8％ 1±0.05 Tenth lens 39.3 1.55±0.001 75.23±0.8％ 4.4±0.05 Eleventh lens 27.8 1.51±0.001 60.64±0.8％ 4.8±0.05 Twelfth lens -23.1 1.73±0.001 51.49±0.8％ 3.8±0.05 Thirteenth lens 50.7 1.92±0.001 20.88±0.8％ 1.6±0.05 Fourteenth lens -15.1 1.80±0.001 46.58±0.8％ 0.8±0.05 The fifteenth lens 18.9 1.53±0.001 48.84±0.8％ 3.8±0.05 Sixteenth lens -15.2 1.80±0.001 46.58±0.8％ 0.8±0.05 Lens 17 25.9 1.52±0.001 56.80±0.8％ 2.5±0.05

[0134] Table 2 Surface parameters of each lens

[0135]

[0136]

[0137] Table 3 Air spacing of lenses at different focal lengths (mm)

[0138]

[0139] According to the above parameters, the lens of this embodiment can achieve the following indicators:

[0140] Focal length: 50mm~360mm;

[0141] Maximum image height: φ18.8mm;

[0142] Aperture F: 4.0~6.0;

[0143] Working wavelength: 500nm~1000nm;

[0144] Lens shape: 200mm×φ71mm.

[0145] The MTF graphs of the lens at short focus 50mm and long focus 360mm show that the aberrations in each field of view can be well controlled, and the MTF values ​​at 100lp / mm are all above 0.2, meeting the requirements for high-definition imaging.

[0146] The zoom design of this lens adopts the mechanical positive group compensation method, which can better realize the correction of chromatic aberration and secondary spectrum, and the movement trajectory of the compensation lens group is smooth, which can better increase the zoom ratio of the system. For the zoom system, the secondary spectrum of each focal length segment changes with the change of focal length, and the maximum value of the secondary spectrum appears at the telephoto end. The role of different lens groups is achieved by selecting lens materials with different refractive indices and dispersion coefficients. The front fixed lens group is mainly used to correct spherical aberration, sine difference, field curvature and distortion at the telephoto end, and can also correct astigmatism, distortion and off-axis spherical aberration at the short focal end, and also contributes to most of the secondary spectrum of the system; the zoom lens group undertakes the zoom function of the entire optical system; the compensation lens group is close to the variable aperture, which reduces the off-axis light height, and the off-axis astigmatism, distortion and other aberrations are small, focusing on the correction of spherical aberration, sine difference and its higher-order aberration on the axis. The rear fixed lens group ensures that the system's optical power remains unchanged and compensates for the residual aberrations of the front components. Moreover, the lens achieves both compactness and lightness by reasonably setting the number of lenses and parameters, which helps to ensure the structural design space for variable magnification, focusing and compensation. It can also achieve large light throughput, large target area, large-magnification continuous zoom, temperature compensation and fog-penetrating functions, with high imaging quality and a wide range of applications.

[0147] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0148] The above-described embodiments only express the more specific and detailed embodiments described in this application, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of this application, which all belong to the protection scope of this application. Therefore, the protection scope of the patent application shall be based on the attached claims.

Claims

1. A high-magnification continuous zoom fog-penetrating lens, characterized in that: The large-magnification continuous zoom fog-penetrating lens comprises a front fixed lens group (11), a magnification lens group (12), a compensation lens group (13), a rear fixed lens group (15), a temperature focusing lens group (16) and a filter switch (17) which are arranged in sequence along the incident direction of light, wherein the magnification lens group (12), the compensation lens group (13) and the temperature focusing lens group (16) can all be moved along the optical axis direction, wherein: The front fixed lens group (11) comprises a first lens (101) and a first cementing group (B1) arranged in sequence along the incident direction of light, the variable power lens group (12) comprises a fifth lens (105) and a second cementing group (B2) arranged in sequence along the incident direction of light, the compensation lens group (13) comprises an eighth lens (108) and a third cementing group (B3) arranged in sequence along the incident direction of light, the rear fixed lens group (15) comprises a fourth cementing group (B4), a fifth cementing group (B5) and a fifteenth lens (115) arranged in sequence along the incident direction of light, the temperature focusing lens group (16) comprises a sixth cementing group (B6), and the filter switch (17) comprises a filter and an anti-reflection film, and is used to realize the switching of the filter and the anti-reflection film in a direction perpendicular to the optical axis; The high-magnification continuous zoom fog-penetrating lens also meets the following conditions: 161.3mm≤f1≤162.3mm, -47.1mm≤f5≤-46.1mm, 74.9mm≤f8≤75.9mm, 18.6mm≤f15≤19.6mm, 380.8mm≤fB1≤410.8mm, -49.5mm≤fB2≤-45.5mm, 80.8mm≤fB3≤84.8mm, -305.8mm≤fB4≤-278.9mm, -23.5mm≤fB5≤-21.5mm, -50.1mm≤fB6≤-47.6mm Wherein, f1 is the focal length of the first lens (101), f5 is the focal length of the fifth lens (105), f8 is the focal length of the eighth lens (108), f15 is the focal length of the fifteenth lens (115), fB1 is the focal length of the first cemented group (B1), fB2 is the focal length of the second cemented group (B2), fB3 is the focal length of the third cemented group (B3), fB4 is the focal length of the fourth cemented group (B4), fB5 is the focal length of the fifth cemented group (B5), and fB6 is the focal length of the sixth cemented group (B6).

2. The high-magnification continuous zoom fog-proof lens according to claim 1, characterized in that: The air gap between the front fixed lens group (11) and the variable power lens group (12) is 9.5 mm to 40 mm, the air gap between the variable power lens group (12) and the compensation lens group (13) is 1 mm to 61.7 mm, the air gap between the compensation lens group (13) and the rear fixed lens group (15) is 3.2 mm to 33.4 mm, and the air gap between the rear fixed lens group (15) and the temperature focusing lens group (16) is 1 mm to 2.6 mm.

3. The high-magnification continuous zoom fog-proof lens according to claim 1, characterized in that: The air gap between the first lens (101) and the first cemented group (B1) is 0.2±0.05 mm, the air gap between the fifth lens (105) and the second cemented group (B2) is 4.85±0.05 mm, the air gap between the eighth lens (108) and the third cemented group (B3) is 0.15±0.05 mm, the air gap between the fourth cemented group (B4) and the fifth cemented group (B5) is 8.56±0.05 mm, and the air gap between the fifth cemented group (B5) and the fifteenth lens (115) is 1.7±0.05 mm.

4. The high-magnification continuous zoom fog-proof lens according to claim 1, characterized in that: The first cemented group (B1) includes a second lens (102), a third lens (103) and a fourth lens (104) arranged in sequence along the light incident direction; the second cemented group (B2) includes a sixth lens (106) and a seventh lens (107) arranged in sequence along the light incident direction; the third cemented group (B3) includes a ninth lens (109) and a tenth lens (110) arranged in sequence along the light incident direction; the fourth cemented group (B4) includes an eleventh lens (111) and a twelfth lens (112) arranged in sequence along the light incident direction; the fifth cemented group (B5) includes a thirteenth lens (113) and a fourteenth lens (114) arranged in sequence along the light incident direction; the sixth cemented group (B6) includes a sixteenth lens (116) and a seventeenth lens (117) arranged in sequence along the light incident direction, and the following conditions are satisfied: 82.3mm≤f2≤83.3mm, -61.9mm≤f3≤-60.9mm, 149.6mm≤f4≤150.6mm, -23.5mm≤f6≤-22.5mm, 49.2mm≤f7≤50.2mm, -77.6mm≤f9≤-76.6mm, 39.2mm≤f10≤40.2mm, 27.5mm≤f11≤28.5mm, -23.7mm≤f12≤-22.7mm, 50.4mm≤f13≤51.4mm, -15.5mm≤f14≤-14.5mm, -15.5mm≤f16≤-14.5mm, 25.7mm≤f17≤26.7mm wherein, f2 is the focal length of the second lens (102), f3 is the focal length of the third lens (103), f4 is the focal length of the fourth lens (104), f6 is the focal length of the sixth lens (106), f7 is the focal length of the seventh lens (107), f9 is the focal length of the ninth lens (109), f10 is the focal length of the tenth lens (110), f11 is the focal length of the eleventh lens (111), f12 is the focal length of the twelfth lens (112), f13 is the focal length of the thirteenth lens (113), f14 is the focal length of the fourteenth lens (114), f16 is the focal length of the sixteenth lens (116), and f17 is the focal length of the seventeenth lens (117).

5. The high-magnification continuous zoom fog-proof lens according to claim 4, characterized in that: The first lens (101), the second lens (102), the eighth lens (108), the tenth lens (110), the eleventh lens (111), the fifteenth lens (115) and the seventeenth lens (117) are all biconvex lenses, the fifth lens (105) and the ninth lens (109) are all negative meniscus lenses, the third lens (103), the sixth lens (106), the twelfth lens (112), the fourteenth lens (114) and the sixteenth lens (116) are all biconcave lenses, and the fourth lens (104), the seventh lens (107) and the thirteenth lens (113) are all positive meniscus lenses.

6. The high-magnification continuous zoom fog-proof lens according to claim 4, characterized in that: The high-magnification continuous zoom fog-penetrating lens also meets the following conditions: Nd1=1.44±0.05, Vd1=94.52±0.8%; Nd2=1.62±0.05, Vd2=63.39±0.8%; Nd3=1.88±0.05, Vd3=40.81±0.8%; Nd4=1.50±0.05, Vd4=81.61±0.8%; Nd5=1.73±0.05, Vd5=54.69±0.8%; Nd6=1.73±0.05, Vd6=54.69±0.8%; Nd7=1.95±0.05, Vd7=17.94±0.8%; Nd8=1.59±0.05, Vd8=68.34±0.8%; Nd9=1.85±0.05,Vd9=23.79±0.8%;Nd 10 =1.55±0.05,Vd 10 =75.23±0.8%; Nd 11 =1.51±0.05,Vd 11 =60.64±0.8%;Nd 12 =1.73±0.05,Vd 12 =51.49±0.8%; Nd 13 =1.92±0.05,Vd 13 =20.88±0.8%;Nd 14 =1.80±0.05,Vd 14 =46.58±0.8%; Nd 15 =1.53±0.05,Vd 15 =48.84±0.8%;Nd 16 =1.80±0.05,Vd 16 =46.58±0.8%; Nd 17 =1.52±0.05,Vd 17 =56.80±0.8% Among them, Nd1~Nd 17 The refractive indices Vd1 to Vd2 correspond to the refractive indices of the first lens (101) to the seventeenth lens (117) in sequence. 17 They correspond to the dispersion coefficients of the first lens (101) to the seventeenth lens (117) in sequence.

7. The high-magnification continuous zoom fog-proof lens according to claim 1, characterized in that: The large-magnification continuous zoom fog-penetrating lens further comprises a front lens group barrel (401), an electric variable magnification compensation mechanism, a rear lens group barrel (403), an electric focusing mechanism, a rear transition lens group barrel (405) and a camera interface (406), wherein: The front lens barrel (401) is provided with a plurality of first straight grooves parallel to the optical axis, and the front fixed lens group (11) is built in the front lens barrel (401); The electric variable power compensation mechanism comprises a variable power compensation ring (402), a variable power movable lens barrel (407), a compensation movable lens barrel (408), a first driving mechanism and a plurality of variable power compensation guide pin assemblies (62) corresponding to the first straight grooves one by one, wherein: The variable power compensation ring (402) is coaxially sleeved outside the front group lens barrel (401), and a plurality of variable power curve grooves (4021) and a plurality of compensation curve grooves (4022) are formed on the ring wall; The variable-power movable lens barrel (407) and the compensating movable lens barrel (408) are built into the front lens barrel (401), the variable-power lens group (12) is built into the variable-power movable lens barrel (407), and the compensating lens group (13) is built into the compensating movable lens barrel (408); The zoom compensation guide pin assembly (62) comprises a first guide pin (622), the first guide pin (622) being connected to the zoom movable lens barrel (407) or the compensation movable lens barrel (408), the first guide pin (622) on the zoom movable lens barrel (407) passing through the first straight groove and the zoom curved groove (4021) in sequence in a one-to-one correspondence, and the first guide pin (622) on the compensation movable lens barrel (408) passing through the first straight groove and the compensation curved groove (4022) in sequence in a one-to-one correspondence; The first driving mechanism is used to drive the variable power compensation ring (402) to rotate around the axis, thereby driving the variable power movable lens barrel (407) and the compensation movable lens barrel (408) to move along the optical axis; The rear lens barrel (403) is connected to the front lens barrel (401), the rear fixed lens group (15) is built in the rear lens barrel (403), and the annular wall of the rear lens barrel (403) is also provided with a plurality of second straight grooves parallel to the optical axis; The electric focusing mechanism comprises a focusing ring (404), a focusing movable lens barrel (409), a second driving mechanism and a plurality of focusing guide pin assemblies (63), wherein: The focus ring (404) is coaxially sleeved outside the rear lens barrel (403), and a plurality of focus curve grooves are formed on the ring wall; The focus movable lens barrel (409) is built into the rear lens barrel (403), and the temperature focusing lens group (16) is built into the focus movable lens barrel (409); The focusing guide pin assembly (63) comprises a second guide pin (631), wherein the second guide pin (631) is connected to the focusing movable lens barrel (409) and passes through the second straight groove and the focusing curved groove in a one-to-one correspondence. The second driving mechanism is used to drive the focus ring (404) to rotate around the axis, thereby driving the focus movable lens barrel (409) to move along the optical axis; The rear group transition lens barrel (405) is connected to the rear group lens barrel (403), and the filter switch (17) is built in the rear group transition lens barrel (405); The camera interface (406) is connected to the rear group transition lens barrel (405) and is used to connect a camera.

8. The high-magnification continuous zoom fog-proof lens according to claim 7, characterized in that: The first driving mechanism comprises a first potentiometer (501), a first motor (503), a first motor gear (701), a first potentiometer gear (703) and a zoom compensation gear, wherein the zoom compensation gear is coaxially connected to the zoom compensation ring (402), the first motor gear (701) and the first potentiometer gear (703) are both meshed with the zoom compensation gear, the first motor (503) and the first potentiometer (501) are both connected to the front group lens barrel (401), and the first motor (503) is connected to the front group lens barrel (401) through The first motor gear (701) is driven to rotate, thereby driving the variable power compensation ring (402) and the first potentiometer gear (703) to rotate, thereby driving the variable power lens group (12) and the compensation lens group (13) to move along the optical axis to achieve zooming, and the first potentiometer (501) is used to detect the rotation amount of the first potentiometer gear (703) to form a first resistance signal and send it to the camera to determine the focal length of the lens, or to receive the first resistance signal sent by the camera to drive the first motor (503) to achieve zooming; The second driving mechanism comprises a second potentiometer (502), a second motor (504), a second motor gear (702), a second potentiometer gear (704) and a focusing gear, wherein the focusing gear is coaxially connected to the focusing ring (404), the second motor gear (702) and the second potentiometer gear (704) are both meshed with the focusing gear, the second potentiometer (502) and the second motor (504) are both connected to the rear lens barrel (403), and the second motor (504) drives the second motor gear (702) to rotate to drive the focusing ring (404) and the second potentiometer gear (704) to rotate, thereby driving the temperature focusing lens group (16) to move along the optical axis to achieve focusing, and the second potentiometer (502) is used to detect the rotation amount of the second potentiometer gear (704) to form a second resistance signal and send it to the camera to determine the lens defocus amount, or is used to receive the second resistance signal sent by the camera to drive the second motor (504) to achieve focusing; The zoom compensation guide pin assembly (62) further comprises two micro bearings (621) and at least one bearing gasket (623) sleeved on the first guide pin (622), wherein the bearing gasket (623) is located between the two micro bearings (621), and the micro bearing (621) close to the zoom movable lens barrel (407) is slidably connected to the corresponding first straight groove, and the micro bearing (621) away from the zoom movable lens barrel (407) is slidably connected to the corresponding zoom curve groove (4021) or compensation curve groove (4022); The focusing guide pin assembly (63) further comprises a focusing guide pin sleeve (632), wherein the focusing guide pin sleeve (632) is coaxially sleeved outside the second guide pin (631) in a one-to-one correspondence and forms a rotational connection, and the focusing guide pin sleeve (632) is also slidably connected to the corresponding second straight groove and focusing curved groove; A plurality of rolling balls (61) are also provided between the variable power compensation ring (402) and the adjacent ring wall of the front group lens barrel (401).

9. The high-magnification continuous zoom fog-proof lens according to claim 1, characterized in that: The large-magnification continuous zoom fog-penetrating lens further comprises a variable iris (14), wherein the variable iris (14) is located between the compensating lens group (13) and the rear fixed lens group (15), the air interval between the compensating lens group (13) and the variable iris (14) is 3 mm-33.2 mm, and the air interval between the variable iris (14) and the rear fixed lens group (15) is 0.1 mm-0.3 mm.

10. The high-magnification continuous zoom fog-penetrating lens according to any one of claims 1 to 9, characterized in that: Each of the lenses satisfies R<0.3% in the wavelength band of λ=500nm~1000nm; the anti-reflection film satisfies T≤0.5% in the wavelength band of λ<850nm, and T>95% in the wavelength band of λ=850nm~1000nm; the filter satisfies T>95% in the wavelength band of λ=550nm~750nm, and T<0.7% in the wavelength band of λ=850nm~1000nm, wherein λ is the wavelength, R is the reflectivity, and T is the transmittance.

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